• Providing a damper between the gearbox and propeller shaft to isolate vibration from the engine and gearbox.
• Dampens the noise and vibration from the propeller shaft.
• Reduces the shock of forward and reverse gear changes.
• Works in conjunction with the engine mounts by providing the softest element in the shaft assembly to improve performance.
• Acts when overloaded (by running aground or knotting a rope around the shaft) by shearing at a designed point to protect the engine, gearbox, and vessel.

The Poly Flex flexible coupling range is moulded from engineering heat-cured polymer alloys of the highest standards, and all metal components are plated in SA5 cobalt zinc, increasing the metal life that normal zinc plating would give by 600%. All flexible couplings are machined on purpose-built flange jigs and have a maximum runout of 0.002” or 0.05mm. Spigots are machined to a tolerance within +/- 0.002” or +/- 0.05mm.  To ensure maximum strength, durability, and performance of a Poly Flex flexible coupling, an installation guideline is included when sold. All these quality-controlled measures make Poly Flex flexible couplings ideal for any market, including USA manufacturing.

Purchasing one of Poly Flex’s flexible couplings within Australia or overseas, like USA, is easy with a few measurements. You will need to know the measurements of your current gearbox and propeller shaft flanges. A vernier calliper is the best tool to use to measure the following:

• PCD (F) Known As Pitch Circle Diameter:
  • When looking at the gearbox flange, you will find a hole pattern where one hole is aligned with another hole directly opposite it. To find the PCD measure the outside edge of the hole to the inside edge of the hole directly opposite, as shown in figure a. It is good practice to measure more than one hole and take the average.
• Number And Size Of Bolts (B):
  • The number of bolts is determined by the number of holes in the gearbox flange. Our flexible couplings range from a 3-bolt pattern up to a 12-bolt pattern. To determine the size of the bolts, simply measure the inside diameter of the holes in the gearbox flange.
• Spigot (E) Male Or Female:
  • To determine whether the spigot is male or female, check which way it is facing on the gearbox flange. If it is protruding, it is male, and if it is recessed, it is female. If male, measure the outside diameter of the spigot on the gearbox flange using a vernier calliper (figure b). If female, measure the inside diameter of the spigot on the gearbox flange using a vernier calliper (figure c).

• Torque Calculation:
  • For our flexible couplings to work correctly, they must be strong enough to handle and control the torque rating specified for the installation within US manufacturing. In other words, it must be able to carry the torque rating loads output by the engine/gearbox during normal operation but at the same time be able to shear at a designed point to protect both the engine and gearbox. Poly Flex recommends that you use these formulas to calculate the rating of the installation.

For more information regarding Poly Flex flexible couplings and their benefits within the US manufacturing sector, please click here. To find out how Poly Flex can solve your vibration issues, contact us today!

The post Top Qualities Of Flexible Couplings In US Manufacturing appeared first on Poly Flex Australia.

Poly Flex has worked closely with The Prop Shop in Washington, USA to stock a range of off-the-shelf half couplings ready for dispatch and installation in response to the growing demand for half couplings in the USA. All Poly Flex half couplings are shaft machined with a H7 morse taper shank reamer assuring the bore is done accurately. All metal components are plated with SA5 cobalt zinc for maximum corrosion resistance and durability.

Quality control plays a pivotal role in daily operations at Poly Flex. We take great pride in our ability to design and produce a wide spectrum of products, incorporating our CNC machining for all our internally designed and manufactured products, including our extensive range of half couplings. This allows Poly Flex to offer a wide range of half couplings to the US market, depending on the customer’s application.

Poly Flex half couplings are a steel mating component used between the gearbox and output shaft designed to transmit power from the drive train to a driven shaft. Poly Flex manufactures a wide variety of half couplings for the USA market designed to suit multiple applications depending on the shaft setup, including a parallel clamp steel coupling, a pilot steel coupling, and a taper lock steel coupling.

Parallel Clamp Coupling

Firstly, a parallel clamp coupling is our most popular and commonly used half coupling. A parallel clamp half coupling is used in straight shaft applications. It allows the customer to tighten the coupling onto the shaft using socket head cap screws going through the body of it. In smaller horsepower applications, a keyway or grub screw may not be necessary. Poly Flex constantly carry stock of four-inch to six-inch parallel clamp couplings to suit popular or common gearboxes. However, we also carry blank flange custom parallel clamps for applications that aren’t common.

Pilot Bored Coupling

Secondly, Poly Flex manufactures a pilot bored coupling, the most widely recognised half coupling worldwide. A pilot-bored half coupling is commonly utilised in tapered shaft applications. However, it can also be used with straight shafts. These couplings commonly have a keyway or grub screw installed to stop the shaft from slipping. Poly Flex has a wide range of standard stock and regularly manufactures custom pilot bored half couplings to suit the customer’s application.

Taper Lock Coupling

Lastly, a taper lock coupling is used in tight, hard-to-reach straight shaft applications. A taper lock half coupling uses four socket head cap screws found on top of the coupling to tighten the coupling onto the shaft, usually without a keyway or grub screw. These couplings are used in lower horsepower applications, with a common stock of four-inch and five-inch couplings on our shelf. Poly Flex also carries blank flange options for custom manufacturing.

How Keyway Cutting And Shaft Machining Are Used In The Production Of Half Couplings

At Poly Flex, all our shaft machining and keyway cutting procedures are done on the JFMT Ji-460 lathe. We consistently monitor and inspect this lathe, ensuring that all half couplings leaving our factory meet our second-to-none expectations. All half couplings are precision bored with an H7 Morse taper shank reamer, attaining superior accuracy in hole diameter. All half couplings are clocked prior to shaft machining and keyway cutting and checked after machining for accuracy. This allows Poly Flex to dispatch half couplings internationally, including in the USA, knowing our product will fit and perform as it should. Poly Flex proudly designs and manufactures all our half couplings, allowing them to be easily modified to suit a customer’s application.For more information regarding our extensive half coupling range for the USA marine industry, please click here.  Alternatively, contact us today to discuss all your manufacturing needs.

The post The Role Of Half Couplings In USA Marine Settings appeared first on Poly Flex Australia.

1. The Cost Of Waiting Too Long For Engine Mount Replacements.

Being aware of common symptoms of damaged or worn engine mounts will help you identify if and when engine mount replacements are on the agenda:

1. Increased Vibrations:

One of the most common symptoms of damaged or worn engine mounts is increased vibration during operation. If you notice that your engine is making more noise or you feel more vibration than usual when started, this is a key sign of worn mounting systems that may need to be replaced. When engine mounts are damaged or worn the anti-vibration properties weaken as the mount can no longer perform at 100%. An increase in vibration leads to the engine making more noise, causing damage if left for an extended period.

2. Rough Start:

Upon starting your engine, you may notice an excessive lurch that doesn’t feel right. This is another common symptom of needing engine mount replacements. When running it may steady into a constant vibration, another telltale sign. You may also experience a lurch when turning the engine off.

3. A Rough Ride:

Another common sign that engine mount replacements are needed is a jolt when changing gears. Another indication is if you notice the engine is working harder under load. If your engine doesn’t have the same smooth feeling, a worn engine mount could be the cause.

4. Excessive Noise:

Excessive noise from the engine is a by-product of failed mounting systems. The increased movement causes the engine to become misaligned and contact other components, leading to impact sounds that become quite noticeable.

5. Visual Wear:

With use, engine mounting systems do change in appearance. However, if significant corrosion, cracks, or crumbling are seen, the mounts will likely be worn. If any cracks or crumbling to the engine mounts properties are noticed, this will limit performance depending on the severity and root cause. The effectiveness of mounting systems relies on their form and shape, as any changes can damage the engine. If you notice any visual wear on the engine mounts, engine mount replacements should be at the top of the agenda.

2. Standard Engine Mount Replacements

Poly Flex engine mount replacements are a high quality, high performance, durable and robust true marine propulsion mounting system designed with sufficient vertical deflection to obtain proven vibration isolation with minimum thrust and lateral deflection under load and inertia due to conditions. Made from high-quality engineering-grade polyurethane, these replacement mounts prevent rust and are resistant to oil and fuel. They are designed to isolate vibration across the rev range without compromising the alignment of the driveline. Designed as a fail-safe system that is capable of holding the same weight inverted to avoid the engine tearing away from its anchor point in rough conditions or in the event of a capsize. Poly Flex engine mount replacements allow for easy replacement of the core and hardware, limiting the need to replace the whole unit. They control thrust in all directions due to the core design being 360 degrees and can handle shock upon impact due to a 400% stretch factor in the polyurethane base material. All the metal components are coated in SA5 Cobalt Zinc, inhibiting rust for extended life and due to the polyurethane design, no electrolysis occurs between aluminium and steel structures.

3. Factors Affecting The Need For Engine Mount Replacements.

There are many reasons as to why engine mount replacements are needed. Below are some of the most common:

1. Poor Installation:

While you can install your engine mount replacements yourself, it is always recommended to get a reputable and qualified mechanic to either install the mounting systems or check the final installation and adjust where needed. This will ensure that your new engine mount replacements will be installed properly to perform as they should and last longer.

2. Ageing:

A common cause of engine mount failure is age. The materials used to make engine mounts are prone to wear over time and may lose anti-vibration properties, lessening the function of your engine. Age and stress can lead to engine mount breakdown. As soon as this is noticed, made obvious by more vibration and excessive noise, you should seek engine mount replacements.

3. Accident Involvement:

If you have experienced an accident, you should always check for internal damage, such as engine mount failure. The jolt of an accident can cause mounting systems to become damaged, which will worsen over time, leading to increased vibration and excessive noise.

4. Operation Techniques:

Excessive operation, including over-revving and improper use of gear change, can cause severe damage to your mounting systems. Practicing proper operation techniques can extend the life of your engine mounts significantly.

5. Fluid Leaks:

Especially in rubber mounting systems, fluid leaks could cause the material to soften, leading to failure.

4. How Long Until You Need to Replace Engine Mounts, and Should You Replace Them All At Once?

Usually, engine mounting systems tend to last at least 5-7 years, depending on the application. However, it is always recommended to get them checked regularly when maintenance work is conducted. Making sure your mounting systems are maintained and in alignment will keep your operating experience as smooth as possible. While replacing all mounting systems at once isn’t needed, it is always recommended. When one engine mount is damaged, more pressure is put on the remaining, causing them to work harder and accelerate the wear. If you only replace one engine mount, it is recommended you pay close attention to the others, as the accelerated wear could cause failure soon after. Therefore, you may have to change more than one mounting system, if not all, depending on how much damage has been caused. As such, it is recommended all engine mount replacements should be installed at the same time.For more information regarding Poly Flex Mounting Systems, including our Core Replacement and Engine Mount Assembly Procedure, click here. For all other enquiries regarding engine mount replacements,  contact us today.

The post How Much Does It Cost To Replace Engine Mounts appeared first on Poly Flex Australia.

The most common reasons for vibration minimizing mount failure are:

• General wear and tear damage to the rubber/polymer material.
• Metal components damaged by corrosion.
• Improper installation.
• Under sizing.
• Hard shifting.
• Groundings.
• High loading impact/excessive g force caused by running hard in a high sea state.
• Poor vessel structure, such as weak stringers or a flexing hull.

Of the reasons above, improper mount installation is most often the cause of poor engine mount performance. It is important to ensure installation is done correctly. This will ensure your investment is protected, avoid premature engine wear, prevent damage, and, most importantly, improve overall passenger comfort and safety.

Boats are designed to provide a comfortable experience for passengers, making smooth operation the top priority. One crucial component that significantly enhances the ride quality is the use of vibration minimizing mounts.

Poly Flex’s high-quality, durable, and robust true propulsion vibration minimizing mounts have controlled thrust and lateral deflection under propulsion load and inertia due to sea conditions. Poly Flex analyses the engine set-up and tailors our engine mounts to suit the application. This way, we can establish that the vibration minimizing mount will work to its desired performance before installation.

With over 1600 vibration minimizing mounts and workloads ranging from 10 to 2200 kilograms per mount, Poly Flex can assist with a commonly stocked item; however, should a custom engine mount be required, Poly Flex has the capacity to manufacture products to suit a customer’s requirements.

Made from high-quality engineering-grade polyurethane, these vibration minimizing mounts prevent rust and are resistant to oil and fuel. They are designed to isolate vibration across the rev range without compromising the alignment of the driveline. The system is designed as a fail-safe system capable of holding the same weight inverted to avoid the engine tearing away from its anchor point in rough conditions or in the event of a capsize.

Poly Flex vibration minimizing mounts allow for easy replacement of the core and hardware, limiting the need to replace the whole unit. They control thrust in all directions due to the core design being 360 degrees and can handle shock upon impact due to a 400% stretch factor in the polyurethane base material. All the metal components are coated in SA5 Cobalt Zinc, inhibiting rust for extended life. Due to the polyurethane design, no electrolysis occurs between aluminium and steel structures.

All Poly Flex engine mounts are Det Norske Veritas (DNV) type approved for vessels in survey. Poly Flex has been providing Australian-made quality and performance that is second to none since 1981, and with a strong focus on customer service, we hope to continue for many more years to come.

Please feel free to contact us with any questions you may have or to place an order.

The post How To Find The Best Vibration Minimizing Mounts To Stop Vibrations In Boats appeared first on Poly Flex Australia.

Poly Flex’s in-house Australian production of precision flexible couplings for the USA market has filled the gap for an expedited product that can be supplied without long wait times. Poly Flex’s ability to produce its entire range in-house allows it to manufacture and dispatch custom orders within a few working days and get them to customers in the USA quickly. Couplings can be manufactured to accommodate a range of coupling bolt configurations, including 2,3,4,6,8,10,12, and custom coupling bolt holes.

The export of flexible couplings in the USA has become important within the engineering landscape. Polyurethane flexible couplings in the USA find applications in a diverse range of industries. Poly Flex’s extensive flexible coupling range is designed to cover a large percentage of recognised brands, such as Twin Disc, ZF, Dong-I, Borg Warner, Bukh, Newage, Paragon, Technodrive, Volvo, and Yanmar.

The demand for flexible couplings in the USA has grown over recent years, with wait times for products becoming greater. Poly Flex’s flexible couplings are all designed in our facility. Poly Flex constantly carries stock, meaning orders can be expedited and dispatched quickly allowing Poly Flex to quickly send customers a finished product ready for installation.

Poly Flex has worked closely with The Prop Shop in Washington, USA, to stock a range of off-the-shelf flexible couplings ready for dispatch and installation in response to the growing demand in the USA.

Poly Flex offers in-stock flexible couplings, providing solutions to customers in the commercial sector in the USA and other countries that require quick turnaround to minimise downtime. For more information, including our off-the-shelf range, please click here. 

Alternatively, contact us today for any custom manufacturing requirements.

The post Sending Australian-Made Flexible Couplings To the USA appeared first on Poly Flex Australia.

Why Are Poly Flex Couplings Suitable For Use In Light Engines?

Poly Flex flexible couplings for engines are moulded from engineering heat cured polymer alloys meeting the highest standards. Poly Flex uses various hardness polymer alloys to achieve the most desirable vibration control balanced with durability, including:

• 80A durometer (green) light duty
• 90A durometer (red) medium duty
• 95A durometer (light blue) heavy duty
• 80D durometer (dark blue) super heavy duty

This allows Poly Flex to tailor a flexible coupling to customer requirements based on factors such as:

• Vessel construction
• Engine/Gearbox make and model
• Engine horsepower
• Engine RPM
• Gearbox reduction ratio
• Engine/Gearbox configuration
• Vessel use

Important Design Factors In Couplings For Engines.

All flexible couplings for engines are tested to determine the torque rating in Newton-Metre, allowing Poly Flex to supply an appropriate hardness flexible coupling to suit any application. Poly Flex design all flexible couplings to be rated at 50%-70% maximum allowable static torque to allow for dynamic loads. To ensure maximum strength, durability and performance, all flexible couplings for engines are dispatched with installation guidelines outlining the process and recommended torque settings for the bolts. Poly Flex flexible couplings are provided with all hardware necessary to install, meaning no further machining or bolting is needed between the existing flanges.

How Do Couplings For Engines Enhance Performance?

A flexible coupling provides a damper between the gearbox and output flange, helping isolate torsional vibration and reduce shocks from forward and reverse gear changes. With an extensive range of flexible couplings for engines, Poly Flex covers a large percentage of gearboxes, including but not limited to Twin Disc, ZF, Dong-I, Borg Warner, Bukh, Newage, Paragon, Technodrive, Volvo, and Yanmar.

Poly Flex manufactures a wide range of flexible couplings for engines that are continuously expanding. Poly Flex is a leading manufacturer and supplier located in Brisbane that has been supplying Australian-made flexible couplings worldwide. For more information, including our entire stocked range, please click here.

The post What Are The Best Couplings For Light Engines? appeared first on Poly Flex Australia.

Precise rudder alignment is crucial for effective steering and overall vessel performance. Poly Flex’s range of rudder bearing systems is designed to provide exceptional alignment precision. This accuracy ensures that the rudder operates smoothly and efficiently, reducing the strain on the vessel’s steering mechanism and enhancing navigational control.

Poly Flex rudder bearings are made from Polenite, a unique range of engineering heat-cured polymer alloys. One significant benefit of using Polenite is its superior corrosion resistance. Traditional rudder bearings often involve dissimilar metals, which can lead to electrolysis and accelerated corrosion. The Polenite material used in Poly Flex rudder bearing systems effectively minimises the risk, ensuring longer-lasting performance and reduced maintenance needs.

Poly Flex rudder bearing systems are renowned for their strength and durability. These bearings are not just about ensuring smooth performance; they are designed to withstand the harsh conditions of the marine environment. The top and bottom bearings are impregnated with a dry lubricant, which enhances their durability and performance. This impregnation allows the bearings to function effectively under various marine conditions, providing reliable support for the rudder system.

Maintenance is a critical aspect of any marine component, and Poly Flex rudder bearings are designed with ease of maintenance in mind. The inclusion of nitrile ‘O’ rings and grease seal, along with all-stainless-steel grease nipples, makes maintaining these rudder bearing systems straightforward. This design ensures that regular maintenance can be performed quickly and efficiently, minimising downtime and ensuring the continuous operation of the tugboat.

Poly Flex understands that different vessels have unique requirements. Our rudder bearing systems come in shaft sizes ranging from 1” to 3”, offering versatility and customisation options. This range ensures that our rudder bearing systems can accommodate various vessel specifications, making them suitable for a wide range of tugboats. This customisation capability means that each bearing system can be tailored to meet the requirements of the vessel, ensuring optimal performance.

All Poly Flex rudder bearing systems are proudly designed and manufactured in our Brisbane-based facility. This local production ensures that each component meets the highest standards of quality and precision. Our commitment to manufacturing excellence means that our rudder bearing systems are reliable, durable, and perfectly suited for the demanding conditions of the marine environment.

When it comes to choosing the best rudder bearing systems for tugboats, Poly Flex stands out in the marine environment. Our rudder bearing systems made from Polenite offer unmatched alignment precision, superior corrosion resistance and exceptional durability. The ease of maintenance and the ability to customise these bearings to fit various vessel requirements further enhance their appeal. Proudly designed and manufactured in Australia, Poly Flex rudder bearing systems are the top choice for ensuring smooth and reliable operation in tugboats.For more information on our rudder bearing systems and how they can benefit your vessel, visit Poly Flex.

The post What Are The Best Rudder Bearings For Tug Boats? appeared first on Poly Flex Australia.

1. Reduction Of Vibrations

Vibration isolation couplings are specifically engineered to reduce the transmission of vibrations from the engine and gearbox to the vessel. If not managed properly, these vibrations can lead to discomfort for passengers and potential damage to the vessel’s structure. By absorbing and dampening these vibrations, vibration isolation couplings ensure a quieter and more comfortable environment on board.

2. Enhanced Comfort For Passengers

For passengers on cruise ships and ferries, comfort is paramount. Excessive vibrations can cause discomfort and even seasickness. Vibration isolation couplings play a vital role in mitigating these vibrations, providing a smoother and more enjoyable ride. This enhanced comfort can make a significant difference in the overall passenger experience, encouraging repeat travel and positive reviews.

3. Compatibility With A Wide Range Of Gearboxes

Poly Flex offers over 200 vibration isolation coupling models designed to cover a large percentage of gearboxes, including popular brands such as Twin Disc, ZF, Dong-I, Borg Warner, Bukh, Newage, Paragon, Technodrive, Volvo, Yanmar, and many more. This extensive compatibility ensures that our vibration isolation couplings can be integrated into virtually any cruise ship or ferry, providing versatile and reliable performance.

4. Wide Range Of Workloads

Our vibration isolation couplings are capable of handling workloads ranging from 10 to 2500 horsepower, catering to various applications. This flexibility allows us to provide the right coupling solution for all applications, from small ferries to large cruise ships. Additionally, Poly Flex offers over 1600 engine mounting systems with workloads ranging from 10 to 2000 kilograms per mount, further enhancing the stability and smooth operation of the vessel.

5. Durability And Reliability

Cruise ships and ferries operate under demanding conditions, requiring components that can withstand continuous use and harsh marine environments. Poly Flex vibration isolation couplings are manufactured to the highest standards of durability and reliability. Our couplings are designed to endure the rigours of marine operations, providing long-lasting performance and peace of mind for vessel operators.

6. Improved Vessel Longevity

By effectively managing vibrations, vibration isolation couplings help protect other critical components of the vessel, such as the drivetrain and hull. This protection reduces wear and tear, leading to fewer maintenance requirements and extending the overall lifespan of the vessel. Operators can enjoy lower maintenance costs and longer service intervals, enhancing the economic efficiency of their operations.

7. Custom Solutions For Unique Requirements

Poly Flex understands that every vessel has unique requirements. In addition to our standard range of vibration isolation couplings, we offer custom solutions tailored to customer needs. Whether it’s a particular gearbox model or a unique power configuration, our engineering team can design and manufacture couplings that perfectly fit the application, ensuring optimal performance.

Vibration isolation couplings are essential for providing a smooth and comfortable ride on cruise ships and ferries. By reducing engine and gearbox vibrations, enhancing passenger comfort, and offering compatibility with a wide range of gearboxes, Poly Flex’s vibration isolation couplings deliver unmatched performance and reliability. With over 200 vibration isolation coupling models and over 1600 engine mount models, we have the right solution for any marine application. Contact Poly Flex for more information on how Poly Flex can enhance your vessel’s performance and passenger comfort.

The post How Vibration Isolation Couplings Give Cruise Ship And Ferry Passengers A Smoother Ride appeared first on Poly Flex Australia.

1. Torsional Vibration Isolation

A primary benefit of flexible couplings is their ability to isolate torsional vibration. When fishing vessels are in operation a lot of torsional vibration can be generated. A flexible coupling acts as a damper, effectively absorbing and isolating vibrations. This prevents the transfer of vibration to other components of the vessel reducing wear and tear and improving the longevity of the vessel.

2. Reduction Of Shocks From Gear Changes

Fishing vessels frequently shift between forward and reverse gears, causing sudden shocks to the drivetrain. Flexible couplings are designed to absorb the shocks, providing smoother gear changes. This not only enhances the crew’s comfort but also protects the mechanical components from damage, ensuring a more reliable and efficient operation.

3. Ease Of Installation

Poly Flex flexible couplings are supplied with all the necessary hardware for installation. This means no additional machining or bolting is required between the existing flanges. Additionally, flexible couplings come with detailed installation guidelines outlining the process and recommended torque settings for the bolts. This ease of installation saves time and reduces the risk of errors during the setup, making it a hassle-free solution for fishing fleets.

4. Customised Torque Rating

At Poly Flex, the torque rating of flexible couplings in Newton Meters (Nm) is determined by several factors, including vessel horsepower, gearbox reduction ratio, and RPM. This customisation ensures that each coupling is precisely matched to the vessel’s requirements. Whether the vessel is used for pleasure or commercial purposes, Poly Flex flexible couplings are designed to provide optimal performance and reliability.

5. Standard And Custom Designs

Poly Flex offers standard designed flexible couplings and custom manufacturing to meet the diverse needs of the marine industry. Our standard designs are readily available and suitable for a wide range of gearboxes. For vessels with unique requirements, Poly Flex provides a custom solution tailored to specific needs. This flexibility ensures that our flexible couplings can accommodate any operational demand, providing a perfect fit for any vessel.

6. Manufactured In Australia, Exported To The World

Poly Flex takes pride in manufacturing high-quality flexible couplings in Australia and exporting them worldwide. Its commitment to quality and precision engineering ensures that Poly Flex products meet the highest standards. By producing locally and distributing globally, Poly Flex provides reliable and efficient solutions to fishing fleets around the world.

In conclusion, flexible couplings offer advantages for fishing fleets. From isolating torsional vibration and reducing gear change shocks to offering easy installation, flexible couplings are essential for maintaining the smooth operation and longevity of marine vessels.

If you are looking to enhance your vessel’s performance and reliability, consider the benefits of Poly Flex flexible couplings. With expertise and dedication to quality, Poly Flex is your trusted partner for all your flexible coupling needs.For more information on Poly Flex products and services, contact us today.

The post What Are The Advantages Of Flexible Couplings For Fishing Fleets? appeared first on Poly Flex Australia.

What happens when commercial engine mounts are not changed regularly?

No matter the quality of your engine mounts, they will begin to wear over time due to the factors above and eventually will require replacement. Not replacing an engine mount that is worn out can lead to the following:

Engine Damage:

Excessive engine movement may occur due to failed marine engine mounts causing misalignment. Damaged or worn mounting systems may cause the engine to slide around in all directions, which can be particularly noticeable when working hard under load.

Risk:

If a marine engine mount breaks under load, it will no longer effectively support the engine. Damaged components can create a safety hazard for yourself and others.

Is there a schedule for replacing marine engine mounts, and should all mounts be replaced at once?

While replacing all mounting systems at once isn’t needed, it is always recommended. When one marine engine mount is damaged, more pressure is put on the remaining, causing them to work harder and accelerate the wear. If you only replace one marine engine mount, it is recommended you pay close attention to the others, as the accelerated wear could cause failure soon after. Therefore, you may have to change more than one mounting system, if not all, depending on how much damage has been caused. As such, it is recommended that all replacement mounts be installed at the same time.

Alignment is key when installing marine engine mounts!

It is important to install the marine engine mounts parallel to the engine’s centreline. The engine bed/bracket must be parallel to both planes (the mounting surface must be parallel with the engine crankshaft centreline). If the marine engine mounts are not installed parallel, they will become “point loaded,” with one end of the engine mounts polymer core compressed and the other unevenly tensioned. This could result in poor performance, a higher potential for stud fracturing, or premature failure.

Hints and tips when installing marine engine mounts.

Height Matters:

It is important the engine bracket isn’t posted too far up the stud. The engine bracket is supported by the adjusting stud. Ideally, the engine bracket should sit as low as possible on the adjusting stud. The higher up the bracket sits on the adjusting stud, the more stressed the stud becomes from the propeller’s thrust risking a break. Over-extending can lead to broken studs or failure due to thrust because the polymer core is deformed. If the brackets end up too high on the stud, shimming is the solution. Shim the engine mount from the bottom using non-compressible materials such as steel, aluminium, fibreglass, or polyurethane.

Support The Engine Mounts Properly:

Engines mounted on weaker stringers can lead to transmission failures. This is due to the most damaging part of the misalignment being taken by the transmission coupling and output shaft bearings. If the marine engine mounts can’t be installed directly on the stringer, it is recommended that heavy-duty brackets that don’t flex be built.

Use The Correct Hardware:

Stainless steel hardware doesn’t have the tensile strength and rigidity needed for most installations when securing the engine mounting systems to the stringer. The ideal fastener is grade eight mild steel to handle the expected loads, and washers should be thick and heavy-duty. All Poly Flex marine engine mounts come ready to install with suitable hardware.

Ensure The Load Is Equal:

Each marine engine mount must carry the appropriate load. Having different loaded engine mounting systems can cause problems with balance, resulting in poor isolation and premature failure. Unevenly loaded marine engine mounts can, in fact, cause more vibration, defeating the purpose of an isolation mounting system. The ideal goal is to balance the weight of the engine/gearbox on each engine mount for the most even distribution.

Ensure The Surface Is Clean:

Mating surfaces for engine mounts should not be painted. Under heavy compression, even a thin layer of paint can cause a loss of tension. Ensure the engine bed is clean of any debris or rust before installing the engine mounting systems. For more detailed information about commercial marine engine mounts, please contact us today.

The post When Do Marine Engine Mounts Need To Be Changed On Commercial Vessels? appeared first on Poly Flex Australia.

Engine mounting system for boats

Poly Flex’s engine mounting systems for boats have countless benefits making them a trusted and reliable isolation system. All engine mounting systems are fail-safe/captured designs made from a lightweight engineering heat-cured polymer alloy that will not rust. They can handle shock on impact due to a 400% stretch factor in the base material. There is no electrolysis between aluminium and steel structures, and our engine mounts for boats will hold the same weight inverted. Poly Flex vibration isolation cores can be replaced easily when needed without replacing the whole mounting system. They are resistant to oil and diesel, all parts are available for replacement, and due to our vibration-minimizing mount cores having a 360-degree design, thrust can be controlled in all directions. All the metal components of Poly Flex mounting systems for boats are protected with a cobalt zinc coating. A few characteristics of the cobalt zinc coating process include enhanced corrosion resistance for the base metal compared to traditional zinc plating of the same thickness. Additionally, brighter lustre is produced when the cobalt zinc coating is applied. Electroplating cobalt zinc to the metal results in a uniform ductility that will be able to achieve up to six times the corrosion resistance of conventional zinc plating.

Can you install an engine mounting system for boats yourself?

When a customer purchases engine mounts for boats, it is important to ensure installation is done correctly. Improper engine mount installation is often the cause of poor replacement engine mount performance. Replacing engine mounts for boats correctly ensures your investment is protected, avoids premature wear of the engine, prevents damage, and, most importantly, improves the overall customer experience.

What fixings are needed to attach an engine mount?

Stainless steel hardware doesn’t have the tensile strength and rigidity needed for most installations when securing the engine mounting systems to the stringer. The ideal fastener is grade eight mild steel to handle the expected loads, and washers should be thick and heavy-duty. All Poly Flex marine engine mounts come ready to install with suitable hardware.

Do Poly Flex engine mounting systems for boats come with installation instructions?

All Poly Flex engine mounts for boats are proudly designed, manufactured, and tested in-house. To ensure maximum strength, durability, and performance, all engine mounts are dispatched with installation guidelines that outline the process. For more information regarding our extensive engine mount range, please click here. Alternatively, contact us today.

The post What Is An Engine Mounting System For Boats? appeared first on Poly Flex Australia.

Common working vessels include but are not limited to:

Tugs:

A tugboat is a type of working boat designed to push/pull other vessels to another location or manoeuvre into position.

Barges:

Barges are vessels that are designed to be loaded either on top or inside of it to carry a product to a location. They are either self-propelled or pushed/pulled by tugs.

Crew Boats:

Crew boats are designed to carry personnel to other locations. In most cases, crew boats also have large back decks that can accommodate deck cargo. They are also known as sea-going taxis.

Supply Boats:

Supply boats are designed to carry large amounts of deck cargo and have internal tanks for various liquid products for oil field rigs. They are known as sea-going trucks.

Fishing Vessels:

Fishing vessels are designed to accomplish various fishing activities. They vary in size and type depending on the intended fishery.

Patrol/Security Vessels:

Patrol/security vessels are designed to patrol the coast and enforce regulations. They are commonly used in harbour activities to enforce closures or keep unwanted vessels a safe distance from a location or ship.

Cargo Vessels:

Cargo vessels are used to transport various types of cargo all over the world.

Engine mounts for working boats are diverse, with different types, materials, and sizes available depending on the engine’s overall weight, horsepower, and the vessel’s use. Poly Flex analyses the engine set-up and tailors the engine mount to suit the working boat.

What are common engine mount problems commercial vessels experience?

Being aware of the common symptoms of damaged engine mounts for working boats will help vessels identify when maintenance work is on the agenda, allowing companies to get back on the water earning money faster. These can include:

• Increased vibration.
• Rough start.
• A rough ride.
• Excessive noise.
• Visual wear.

Which marine engine mounts are suitable for large working boats?

Poly Flex’s high-quality, durable, and robust true propulsion engine mounts for working boats have controlled thrust and lateral deflection under propulsion load and inertia due to sea conditions. Poly Flex analyses the engine set-up and tailors our engine mounts to suit the working boat. This way, we can establish that the engine mount will work to its desired performance before installation.

Do engine mounts for commercial vessels need to be custom-made?

With over 1600 engine mounts for boat models, and workloads ranging from 10 to 2200 kilograms per mount, Poly Flex can assist with a commonly stocked item; however, should a custom engine mount be required, Poly Flex has the capacity to manufacture products to suit a customer’s requirements.

What is the standard delivery time for marine engine mounts for commercial vessels?

If the item is not already in stock, Poly Flex recommends allowing one to three business days for the manufacture and dispatch of engine mounts for boats.

Optimum performance from engine mounts for working boats!

Poly Flex engine mounts for boats are a high quality, high performance, durable and robust true marine propulsion mounting system designed with sufficient vertical deflection to obtain proven vibration isolation with minimum thrust and lateral deflection under load and inertia due to conditions.

Made from high-quality engineering-grade polyurethane, these mounts for boats prevent rust and are resistant to oil and fuel. They are designed to isolate vibration across the rev range without compromising the alignment of the driveline. The system is designed as a fail-safe system capable of holding the same weight inverted to avoid the engine tearing away from its anchor point in rough conditions or in the event of a capsize.

Poly Flex mounting systems for boats allow for easy replacement of the core and hardware, limiting the need to replace the whole unit. They control thrust in all directions due to the core design being 360 degrees and can handle shock upon impact due to a 400% stretch factor in the polyurethane base material. All the metal components are coated in SA5 Cobalt Zinc, inhibiting rust for extended life. Due to the polyurethane design, no electrolysis occurs between aluminium and steel structures.

All Poly Flex engine mounts for boats are Det Norske Veritas (DNV) type approved for vessels in survey. Poly Flex has been providing Australian-made quality and performance that is second to none since 1981, and with a strong focus on customer service, we hope to continue for many more years to come.

Please feel free to Contact Us with any questions you may have or to place an order.

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