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Half Couplings

Also Known As Shaft Couplings, Adapter Plates, Steel Couplings, Steel Coupling Spacers

Poly Flex steel half couplings, coupling spacers and custom cotton reel adaptors are all CNC machined and designed in our facility, they are a steel mating component which is used between the gearbox and the output shaft, with or without a flexible coupling.

Adapter plates and cotton reel adaptors are available on request.

Metal components are plated in SA5 cobalt zinc for maximum corrosion resistance and durability.

Poly Flex products are available directly from our manufacturing facility in Australia and via our USA, Europe, Asia Pacific and Middle East distributors. Find a distributor.

Parallel Clamp Steel Half Couplings | Pilot Bored Steel Half Couplings | Taper Lock Steel Half Couplings | Custom Parallel Clamp Steel Half Couplings | Custom Pilot Bored Steel Half Couplings | Custom Taper Lock Steel Half Couplings | Steel Shaft Coupling Spacers | Custom Steel Shaft Coupling Spacers | Steel Shaft Coupling Adaptor | Custom Cotton Reel Adaptors | Shaft Machining And Keyway Cutting

Parallel Clamp Steel Half Couplings

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ModelFlange ODPCDBolt Hole ClearanceSpigot DiameterSpigot Type & DepthShaft SizeBody LengthBoss DiameterWeight kgData Sheet
424101.6mm (4")78mm (3.071")4 x 11mm (0.433")50mm (1.969")Male 2.5mm (0.098")16 - 38mm (5/8 - 1 1/2")90mm (3.543")71mm (2.795")2.4 (5.29lb)
4344" (101.6mm)3 1/4" (82.55mm)4 x 10.5mm (0.413")2 1/2" (63.5mm)Male 2.5mm (0.098")16 - 38mm (5/8 - 1 1/2")90mm (3.543")71mm (2.795")2.4 (5.29lb)
434F4" (101.6mm)3 1/4" (82.55mm)4 x 10.5mm (0.413")2 1/2" (63.5mm)Female 3.8mm (0.150")16 - 38mm (5/8 - 1 1/2")90mm (3.543")71mm (2.795")2.3 (5.07lb)
434P4" (101.6mm)3 1/4" (82.55mm)4 x 10.5mm (0.413")2 5/8" (66.7mm)Male 2.5mm (0.098")16 - 38mm (5/8 - 1 1/2")90mm (3.543")71mm (2.795")2.4 (5.29lb)
464101.6mm (4")80mm (3.150")4 x 10.5mm (0.413")60mm (2.362")Female 3.8mm (0.150")16 - 38mm (5/8 - 1 1/2")90mm (3.543")71mm (2.795")2.3 (5.07lb)
494101.6mm (4")74.5mm (2.933")4 x 8.5mm (0.335")47mm (1.850")Female 3.8mm (0.150")16 - 38mm (5/8 - 1 1/2")90mm (3.543")71mm (2.795")2.3 (5.07lb)
5245" (127mm)4 1/4" (107.95mm)4 x 11.5mm (0.453")2 1/2" (63.5mm)Male 3.5mm (0.138")22 - 50mm (7/8 - 2")93.5mm (3.681")80mm (3.150")3.5 (7.71lb)
5285.24" (133.09mm)4 1/4" (107.95mm)8 x 11.5mm (0.453")2 1/2" (63.5mm)Male 3.5mm (0.138")22 - 50mm (7/8 - 2")93.5mm (3.681")80mm (3.150")3.6 (7.93lb)
534127mm (5")100mm (3.937")4 x 10.5mm (0.413")65mm (2.559")Male 3.5mm (0.138")22 - 50mm (7/8 - 2")93.5mm (3.681")80mm (3.150")3.5 (7.71lb)
5464 3/4" (120.65mm)3 7/8" (98.42mm)6 x 11.5mm (0.453")2 1/2" (63.5mm)Female 5mm (0.197")22 - 63mm (7/8 - 2 1/2")116.1mm (4.572")95mm (3.740")4.9 (10.80lb)
616 1/2" A6" (152.4mm)4 3/4" (120.65mm)6 x 13mm (0.512")3" (76.2mm)Male 5mm (0.197")38.1 - 76mm (1 1/2 - 3")135.3mm (5.327")120mm (4.724")9.1 (20.06lb)
616 1/2" B6" (152.4mm)4 3/4" (120.65mm)6 x 13mm (0.512")3" (76.2mm)Female 5.7mm (0.224")38.1 - 76mm (1 1/2 - 3")135.3mm (5.327")120mm (4.724")8.6 (18.95lb)
616 5/8"6" (152.4mm)4 3/4" (120.65mm)6 x 16.5mm (0.650")3" (76.2mm)Female 5.7mm (0.224")38.1 - 76mm (1 1/2 - 3")135.3mm (5.327")120mm (4.724")8.6 (18.95lb)

Pilot Bored Steel Half Couplings

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ModelFlange ODPCDBolt Hole ClearanceSpigot DiameterSpigot Type & DepthShaft SizeBody LengthBoss DiameterWeight kgData Sheet
424101.6mm (4")78mm (3.071")4 x 11mm (0.433")50mm (1.969")Male 2.5mm (0.098")16 - 38mm (5/8 - 1 1/2")90mm (3.543")71mm (2.795")2.6 (5.73lb)
4344" (101.6mm)3 1/4" (82.55mm)4 x 10.5mm (0.413")2 1/2" (63.5mm)Male 2.5mm (0.098")16 - 38mm (5/8 - 1 1/2")90mm (3.543")71mm (2.795")2.6 (5.73lb)
464101.6mm (4")80mm (3.150")4 x 10.5mm (0.413")60mm (2.362")Female 3.8mm (0.150")16 - 38mm (5/8 - 1 1/2")90mm (3.543")71mm (2.795")2.5 (5.51lb)
5245" (127mm)4 1/4" (107.95mm)4 x 11.5mm (0.453")2 1/2" (63.5mm)Male 3.5mm (0.138")22 - 50mm (7/8 - 2")93.5mm (3.681")80mm (3.150")3.8 (8.37lb)
5285" (133.09mm)4 1/4" (107.95mm)8 x 11.5mm (0.453")2 1/2" (63.5mm)Male 3.5mm (0.138")22 - 50mm (7/8 - 2")93.5mm (3.681")80mm (3.150")3.9 (8.59lb)
534127mm (5")100mm (3.937")4 x 10.5mm (0.413")65mm (2.559")Male 3.5mm (0.138")22 - 50mm (7/8 - 2")93.5mm (3.681")80mm (3.150")3.8 (8.37lb)
5464 3/4" (120.65mm)3 7/8" (98.42mm)6 x 11.5mm (0.453")2 1/2" (63.5mm)Female 5mm (0.197")22 - 63mm (7/8 - 2 1/2")116.1mm (4.572")95mm (3.740")5.3 (11.68lb)
616 1/2" A6" (152.4mm)4 3/4" (120.65mm)6 x 13mm (0.512")3" (76.2mm)Male 5mm (0.197")25 - 76mm (1 1/2 - 3")135.3mm (5.327")120mm (4.724")9.4 (20.72lb)
616 1/2" B6" (152.4mm)4 3/4" (120.65mm)6 x 13mm (0.512")3" (76.2mm)Female 5.7mm (0.224")25 - 76mm (1 1/2 - 3")135.3mm (5.327")120mm (4.724")9.3 (20.50lb)
616 5/8"6" (152.4mm)4 3/4" (120.65mm)6 x 16.5mm (0.650")3" (76.2mm)Female 5.7mm (0.224")25 - 76mm (1 1/2 - 3")135.3mm (5.327")120mm (4.724")9.2 (20.28lb)

Taper Lock Steel Half Couplings

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ModelFlange ODPCDBolt Hole ClearanceSpigot DiameterSpigot Type & DepthShaft SizeBody LengthBoss DiameterWeight kgData Sheet
424101.6mm (4")78mm (3.071")4 x 11mm (0.433")50mm (1.969")Male 2.5mm (0.098")16 - 31.75mm (5/8 - 1 1/4")66mm (2.598")65mm (2.559")1.6 (3.52lb)
4344" (101.6mm)3 1/4" (82.55mm)4 x 10.5mm (0.413")2 1/2" (63.5mm)Male 2.5mm (0.098")16 - 31.75mm (5/8 - 1 1/4")66mm (2.598")65mm (2.559")1.6 (3.52lb)
464101.6mm (4")80mm (3.150")4 x 10.5mm (0.413")60mm (2.362")Female 3.8mm (0.150")16 - 31.75mm (5/8 - 1 1/4")66mm (2.598")65mm (2.559")1.5 (3.30lb)
5245" (127mm)4 1/4" (107.95mm)4 x 11.5mm (0.453")2 1/2" (63.5mm)Male 3.5mm (0.138")22 - 44.45mm (7/8 - 1 3/4")90.6mm (3.567")80mm (3.150")3.3 (7.27lb)
534127mm (5")100mm (3.937")4 x 10.5mm (0.413")65mm (2.559")Male 3.5mm (0.138")22 - 44.45mm (7/8 - 1 3/4")90.6mm (3.567")80mm (3.150")3.3 (7.27lb)

Custom Parallel Clamp Steel Half Couplings

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ModelFlange ODPCDBolt Hole ClearanceSpigot DiameterSpigot Type & DepthShaft SizeBody LengthBoss DiameterWeight kgData Sheet
4" SB4" (101.6mm)As RequiredAs RequiredAs RequiredAs Required16 - 38mm (5/8 - 1 1/2")90mm (3.54")71mm (2.79")2.6
5" SB5"As RequiredAs RequiredAs RequiredAs Required16 - 38mm (5/8 - 1 1/2")90mm (3.54")71mm (2.79")3.4
6" SB6"As RequiredAs RequiredAs RequiredAs Required16 - 38mm (5/8 - 1 1/2")90mm (3.54")71mm (2.79")4.2
5" MB5"As RequiredAs RequiredAs RequiredAs Required22 - 50mm (7/8 - 2")93.5mm (3.68")80mm (3.15")3.9
6" MB6"As RequiredAs RequiredAs RequiredAs Required22 - 50mm (7/8 - 2")93.5mm (3.68")80mm (3.15")5.1
5" LB5"As RequiredAs RequiredAs RequiredAs Required22 - 63mm (7/8 - 2 1/2")116.1mm (4.57")95mm (3.74")5.6
6" LB6"As RequiredAs RequiredAs RequiredAs Required22 - 63mm (7/8 - 2 1/2")116.1mm (4.57")95mm (3.74")6.9
6" XLB6"As RequiredAs RequiredAs RequiredAs Required38.1 - 76mm (1 1/2" - 3")135.3mm (5.32")120mm (4.72")10.1
7" XLB7"As RequiredAs RequiredAs RequiredAs Required38.1 - 76mm (1 1/2" - 3")135.3mm (5.32")120mm (4.72")
8" XLB8"As RequiredAs RequiredAs RequiredAs Required38.1 - 76mm (1 1/2" - 3")135.3mm (5.32")120mm (4.72")
9" XLB9"As RequiredAs RequiredAs RequiredAs Required38.1 - 76mm (1 1/2" - 3")135.3mm (5.32")120mm (4.72")

Custom Pilot Bored Steel Half Couplings

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ModelFlange ODPCDBolt Hole ClearanceSpigot DiameterSpigot Type & DepthShaft SizeBody LengthBoss DiameterWeight kgData Sheet
4" SB4"As RequiredAs RequiredAs RequiredAs Required16 - 38mm (5/8 - 1 1/2")90mm (3.54")71mm (2.79")2.6
5" SB127mm (5")As RequiredAs RequiredAs RequiredAs Required16 - 38mm (5/8 - 1 1/2")90mm (3.54")71mm (2.79")3.4
6" SB6"As RequiredAs RequiredAs RequiredAs Required16 - 38mm (5/8 - 1 1/2")90mm (3.54")71mm (2.79")4.2
5" MB5"As RequiredAs RequiredAs RequiredAs Required22 - 50mm (7/8 - 2")93.5mm (3.68")80mm (3.15")3.9
6" MB6"As RequiredAs RequiredAs RequiredAs Required22 - 50mm (7/8 - 2")93.5mm (3.68")80mm (3.15")5.1
5" LB5"As RequiredAs RequiredAs RequiredAs Required22 - 63mm (7/8 - 2 1/2")116.1mm (4.57")95mm (3.74")5.6
6" LB6"As RequiredAs RequiredAs RequiredAs Required22 - 63mm (7/8 - 2 1/2")116.1mm (4.57")95mm (3.74")6.9
6" XLB6"As RequiredAs RequiredAs RequiredAs Required38.1 - 76mm (1 1/2" - 3")135.3mm (5.32")120mm (4.72")10.1
7" XLB7"As RequiredAs RequiredAs RequiredAs Required38.1 - 76mm (1 1/2" - 3")135.3mm (5.32")120mm (4.72")
8" XLB8"As RequiredAs RequiredAs RequiredAs Required38.1 - 76mm (1 1/2" - 3")135.3mm (5.32")120mm (4.72")
9" XLB9"As RequiredAs RequiredAs RequiredAs Required38.1 - 76mm (1 1/2" - 3")135.3mm (5.32")120mm (4.72")

Custom Taper Lock Steel Half Couplings

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ModelFlange ODPCDBolt Hole ClearanceSpigot DiameterSpigot Type & DepthShaft SizeBody LengthBoss DiameterWeight kg
4" TL4"As RequiredAs RequiredAs RequiredAs Required16 - 31.75mm 5/8 - 1 1/4"76.5mm65mm1.7
5" TL5"As RequiredAs RequiredAs RequiredAs Required22 - 44.45mm 7/8 - 1 3/4"90.6mm80mm

Steel Shaft Coupling Spacers

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ModelFlange OD (G)PCD (F)Bolt Hole ClearanceSpigot Diameter (E)Spigot Type & DepthThickness (A)Weight kg
424101.6mm78mm4 x 11mm50mmMale 2.6mm Female 5mm30mm1.5
4344"3 1/4"4 x 10.5mm2 1/2"Male 2.6mm Female 5mm30mm1.5
464101.6mm80mm4 x 10.5mm60mmFemale 5mm Male 2.8mm30mm1.5
5245"4 1/4"4 x 11.5mm2 1/2"Male 3mm Female 5mm38mm3
534127mm100mm4 x 10.5mm65mmMale 3mm Female 5mm38mm3

Custom Steel Shaft Coupling Spacers

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ModelFlange OD (G)PCD (F)Bolt Hole ClearanceSpigot Diameter (E)Spigot Type & DepthThickness (A)Weight kg
4" CSP4"As RequiredAs RequiredAs RequiredAs Required30 mm1.8
5" CSP5"As RequiredAs RequiredAs RequiredAs Required38mm3.7
6" CSP6"As RequiredAs RequiredAs RequiredAs Required38mm
7" CSP6"As RequiredAs RequiredAs RequiredAs RequiredAs Required
8" CSP6"As RequiredAs RequiredAs RequiredAs RequiredAs Required
9" CSP6"As RequiredAs RequiredAs RequiredAs RequiredAs Required

Steel Shaft Coupling Adaptor

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ModelFlange OD (G)PCD Gearbox Shaft SideBolt Hole Clearance Gearbox Shaft SideSpigot Diameter Gearbox Shaft SideSpigot Type & Depth Gearbox Shaft SideThickness (A)Weight kg
434 to 4244" (101.6mm)3 1/4" 78mm4 x 10.5mm 4 x 11mm2 1/2" 50mmMale 2.6mm Female 5mm15mm
434 to 4644" (101.6mm)3 1/4" 80mm4 x 10.5mm 4 x 10.5mm2 1/2" 60mmMale 2.6mm Male 2.8mm15mm

Custom Cotton Reel Adaptors

What Machine Does Poly Flex Use For Shaft Machining And Keyway Cutting?

Quality control plays a pivotal role in the machining of shafts. Consistent inspections are carried out to verify that the shaft dimensions conform to specified standards, guaranteeing that the end product is accurately machined and ready for installation. At Poly Flex, all our shaft couplings are meticulously crafted from start to finish within our top-notch CNC lathe and mill systems to ensure their perfect alignment. These couplings are precision-bored to the exact shaft size using an H7 Morse taper shank reamer, ensuring they match the precise specifications of each customer. Before and after shaft machining, they are meticulously checked for accuracy. The use of a reamer in boring a shaft is employed to attain superior precision in hole diameter.

For all shaft machining and keyway cutting procedures, Poly Flex employs the JFMT Ji-460 Lathe, exclusively dedicated to these tasks. We consistently monitor and inspect this lathe to ensure that all shaft couplings leaving our factory meet the highest quality standards.

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Lathe

Poly Flex incorporates CNC machining into our daily operations for all our internally designed and produced items, encompassing various aspects of our CNC machining procedures. We take great pride in our ability to design and manufacture a wide spectrum of products, ranging from large production line orders to personalised one-of-a-kind orders and prototypes.