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Couplings

Our flexible disc transmission coupling provides a damper between the gearbox and propeller shaft to isolate torsional vibration from the engine and gearbox. It also reduces to shock of forward and reverse gear changes.

Our couplings work in conjunction with the engine mounts by providing the softest element in the shaft assembly to improve performance and provide a sacrificial link that is designed to fail before gearbox damage occurs.

They are designed to cover a large percentage of gearboxes, such as Twin Disc, ZF, Dong-I, Borg Warner, Bukh, Newage, Paragon, Technodrive, Volvo, Yanmar and many more.

Available with DNV-GL “Type Approval” upon request for vessels in survey.

While designed for marine use, these couplings are used in many industrial driveline applications too.

2 Bolt Series | 3 Bolt Series | 4 Bolt Series | 6 Bolt Series | 8 Bolt Series | 10 Bolt Series | 12 Bolt Series | Spicer Series | Coupling Specs | Coupling Cross Reference | Transmission Cross Reference

2 Bolt

Two bolt couplings are used on two bolt hole output flanges. Spigots on these couplings can be either male, female, or none, as determined by the flange. Poly Flex couplings are configured to the flanges.

Swipe or scroll right to view all table data →
ModelFlange Bolt Circle Diameter PCD (F)Flange Bolt SizeFlange Index Ring Spigot (E)Flange Index Ring TypePoly Flex Coupling OD (G)Poly Flex Coupling IDPoly Flex Coupling Thickness (A)Flange OD (C)Light Duty Rating (Nm)Medium Duty Rating (Nm)Heavy Duty Rating (Nm)Super Heavy Duty Rating (Nm)Weight (kg)Data Sheet
2.8752 7/8" (73.025mm)5/16" UNFPilotPlain4 5/16" (109.53mm)1 3/8" (34.925mm)1" (25.40mm)2 Leg180210290N/A
40265mm3/8" UNFPilotPlain105mm25mm25.30mm2 Leg180210290N/A
60296.84mmM12PilotPlain154mm25mm25.30mm2 Leg180210290N/A

3 Bolt

Three bolt couplings are used on three bolt hole output flanges. Spigots on these couplings can be either male, female, or none, as determined by the flange. Poly Flex couplings are configured to the flanges.

Swipe or scroll right to view all table data →
ModelFlange Bolt Circle Diameter PCD (F)Flange Bolt SizeFlange Index Ring Spigot (E)Flange Index Ring TypePoly Flex Coupling OD (G)Poly Flex Coupling IDPoly Flex Coupling Thickness (A)Flange OD (C)Light Duty Rating (Nm)Medium Duty Rating (Nm)Heavy Duty Rating (Nm)Super Heavy Duty Rating (Nm)Weight (kg)Data Sheet
303973/8" UNFPilotPlain122mm25mm16mm3 leg180210290N/A0.43
3044" (101.60mm)3/8" UNFPilotPlain5 1/4" (133.35mm)1" (25.40mm)5/8" (16mm)3 Leg180210290N/A0.5
Rolco32 1/4" (57.15mm)3/8" UNF SHCS1" (25.40mm)B4" (101.60mm)5/8" (16mm)1" (25.40mm)3" (76.20mm)N/A125210N/A0.55
305-1278.50mmM8PilotPlain122mm38mm24.50mmToyotaN/AN/A250N/A0.5
305-1478.50mmM8PilotPlain122mm38mm24.50mmToyotaN/AN/A250N/A0.5
306D84mmM8PilotPlain123mm38mm26mmToyotaN/A250N/AN/A0.5
8184 3/4" (120.65mm)5/8" UNFPilotPlain6 5/8" (136.52mm)2" (50.80mm)1 1/16" (27mm)5 3/4" (146.05mm)N/A16802400N/A2.9
5187 5/8"5 1/16" (128.58mm)5/8" UNFPilotPlain7 1/4" (184.15mm)2 1/2" (63.50mm)2" (50.80mm)N/A32004200N/A

4 Bolt

Four bolt couplings are used on four bolt hole output flanges. Spigots can be either male or female, as determined by the flange. Poly Flex couplings are configured to the flanges.

The IV range of Poly Flex couplings is specifically developed to operate in a tensile condition created by integral V drives.

Swipe or scroll right to view all table data →
ModelFlange Bolt Circle Diameter PCD (F)Flange Bolt SizeFlange Index Ring Spigot (E)Flange Index Ring TypePoly Flex Coupling OD (G)Poly Flex Coupling IDPoly Flex Coupling Thickness (A)Flange OD (C)Light Duty Rating (Nm)Medium Duty Rating (Nm)Heavy Duty Rating (Nm)Super Heavy Duty Rating (Nm)Weight (kg)Data Sheet
4043 3/8" (85.72mm)3/8" UNF2 1/2" (63.50mm)A5" (127mm)1.5" (38.10mm)1" (25.40mm)4" (101.60mm)230496610N/A0.6
41470mmM857mmA125mm25.40mm25mm105mm230496610N/A0.62
41685mmM1065mmB152mm50mm25mm105mm230496610N/A0.7
42478mmM1050mmA127mm38.10mm25mm105mm230496610N/A0.8
4343 1/4" (82.55mm)3/8" UNF2 1/2" (63.50mm)A5" (127mm)1.5" (38.10mm)1" (25.40mm)4" (101.60mm)230496610N/A0.76
434P3 1/4" (82.55mm)3/8" UNF2 5/8" (66.67mm)A5" (127mm)1.5" (38.10mm)1" (25.40mm)4" (101.60mm)230496610N/A0.78
45490mmM1060mmA140mm38.10mm25mm100mm230496610N/A0.82
46480mmM1060mmB127mm38.10mm25mm100mm230496610N/A0.8
47475mm7/16" UNF45mmA120mm38.10mm25mm100mm230496610N/A1.2
49090mm7/16" UNF60.03mmA117mm38.10mm28.58mm100mm230496610N/A0.85
49474.5mmM847mmB127mm25.40mm25mm100mm230496610N/A0.65
5144 1/8" (104.77mm)7/16" UNF2 7/8" (73.02mm)A6 1/8" (155.57mm)2" (50.80mm)1 1/8" (28.57mm)5" (127mm)325618703N/A1.37
5244 1/4" (107.95mm)7/16" UNF2 1/2" (63.50mm)A6 1/8" (155.57mm)2" (50.80mm)1 1/8" (28.57mm)5" (127mm)3256187039101.37
524 IRM4 1/4" (107.95mm)7/16" UNF SHCS2 1/2" (63.50mm)A5 7/16" (138.11mm)2" (50.80mm)1 1/8" (28.57mm)5" (127mm)2803785587251.24
524P108mmM1062.50mmA155.60mm50mm28.6mm127mm325618703N/A1.3
534100mmM1065mmA152mm50mm25mm127mm325618703N/A0.95
534 IRM100mmM10 SHCS65mmA133mm50mm25mm127mm2803785587250.83
1386140mmM14PilotPlain185mm75mm35mm165mm325618703N/A
4128128mm5/8" UNC SHCS100mmA170mm58mm38.10mm157.50mm325618703N/A

6 Bolt

Six bolt couplings are used on six bolt hole output flanges. Spigots can be either male or female, as determined by the flange. Poly Flex couplings are configured to the flanges.  Some couplings may need a T bush kit or adaptor to clear obstructions, these can be supplied by Poly Flex.

The IV range of Poly Flex couplings is specifically developed to operate in a tensile condition created by integral V drives.

Swipe or scroll right to view all table data →
ModelFlange Bolt Circle Diameter PCD (F)Flange Bolt SizeFlange Index Ring Spigot (E)Flange Index Ring TypePoly Flex Coupling OD (G)Poly Flex Coupling IDPoly Flex Coupling Thickness (A)Flange OD (C)Light Duty Rating (Nm)Medium Duty Rating (Nm)Heavy Duty Rating (Nm)Super Heavy Duty Rating (Nm)Weight (kg)Data Sheet
41685mmM1065mmB152mm50mm25mm105mm325618703N/A0.70
4363 1/4" (82.55mm)7/16" UNF2 1/2" (63.50mm)A5" (127mm)1 1/2" (38.10mm)1" (25.40mm)4" (101.60mm)325618703N/A
5463 7/8" (98.42mm)7/16" UNF2 1/2" (63.50mm)B6" (152.40mm)2" (50.40mm)1 1/4" (31.75mm)4 3/4" (120.65mm)N/A975156021801.6
546 IRM3 7/8" (98.42mm)7/16" UNF2 1/2" (63.50mm)B6" (152.40mm)2" (50.40mm)1 1/4" (31.75mm)4 3/4" (120.65mm)N/A800136019501.55
556105mmM1060mmA150mm50mm32mm125mmN/A496610N/A1.11
566100mmM1075mmA152mm50mm25mm125mmN/A496610N/A1.12
616 1/2 A4 3/4" (120.65mm)1/2" UNC3" (76.20mm)A6 3/8" (161.92mm)2 3/8" (60.32mm)1 1/2" (38.10mm)5 3/4" (146.05mm)N/A16002550N/A2.95
616 1/2 B4 3/4" (120.65mm)1/2" UNC3" (76.20mm)B6 3/8" (161.92mm)2 3/8" (60.32mm)1 1/2" (38.10mm)5 3/4" (146.05mm)N/A16002550N/A2.95
616 5/84 3/4" (120.65mm)5/8" UNC3" (76.20mm)B6 3/8" (161.92mm)2 3/8" (60.32mm)1 1/2" (38.10mm)5 3/4" (146.05mm)N/A1800275036002.95
6365 3/8" (136.52mm)7/16" UNF3 1/4" (82.55mm)A7 1/4" (184.15mm)2" (50.40mm)1" (25.40mm)6 3/4" (171.45mm)N/A9751560N/A2.4
646125mmM1280mmA160mm50mm32mm146mmN/A9751560N/A2.44
6564 3/4" (120.65mm)5/8" UNC SHCS3" (76.20mm)B6 1/16" (153.99mm)2 3/8" (60.32mm)1 1/2" (38.10mm)5 3/4" (146.05mm)N/A16002550N/A2.95
1306130mmM885mmA162mm60mm25mm155mmN/AN/A915N/A1.5
2056 **205mmM16130mmA260mm75mm38.10mm230mmN/A35005000N/A
2206180mmM20140mmA240mm75mm38.10mm220mmN/A35005000N/A6.35
2306260mmM20170mmA337mm100mm38.10mm320mmN/AN/A8000N/A13
2306 (27)260mmM27170mmA337mm100mm38.10mm320mmN/AN/A8000N/A13
2506250mmM20160mmA336.55mm100mm38.10mm320mmN/AN/A8000N/A13
2506 (27)250mmM27160mmA336.55mm100mm38.10mm320mmN/AN/A8000N/A13
2586220mmM20140mmB300mm100mm42mm258mmN/AN/A8000N/A7.5
6146146mmM14 SHCS110mmA195mm75mm38.10mmN/AN/A3500N/A
6170170mmM16 SHCS130mmA212mm75mm38.10mmN/AN/A4500N/A4.5
6196196mmM20140mmB260mm75mm38.10mm230mmN/A35005000N/A
7206 5/86" (152.40mm)5/8" UNC3 3/4" (95.25mm)B8 3/8" (212.72mm)2 7/8" (73.02mm)1 1/2" (38.10mm)7 1/4" (184.15mm)N/A35004800N/A4.4
7206 3/4 A6" (152.40mm)3/4" UNF3 3/4" (95.25mm)A8 3/8" (212.72mm)2 7/8" (73.02mm)1 1/2" (38.10mm)7 1/4" (184.15mm)N/A35004800N/A4.9
7206 3/46" (152.40mm)3/4" UNF3 3/4" (95.25mm)B8 3/8" (212.72mm)2 7/8" (73.02mm)1 1/2" (38.10mm)7 1/4" (184.15mm)N/A35004800N/A4.9
7306 A152mmM16100mmA195mm75mm38.10mm184mmN/A33004500N/A3.8
7306152mmM16100mmB195mm75mm38.10mm184mmN/A33004500N/A3.8
7406160mm5/8" UNC120mmB240mm75mm38.10mm220mmN/A38005200N/A4.3
7406A160mm5/8" UNC120mmA240mm75mm38.10mm220mmN/A38005200N/A4.4
7506160mmM20100mmA240mm75mm38.10mm220mmN/A38005200N/A4.4
7606 IRM6" (152.40mm)M16 SHCS3 3/4" (95.25mm)B7 1/4" (184.15mm)3 7/8" (98.42mm)1 1/4" (31.75mm)6" (152.40mm)N/AN/A3000N/A3
9114 IRM (3+3)^**7.5" (190.50mm)5/8" UNC6" (152.40mm)B241mm3 7/8" (98.42mm)1 1/2" (38.10mm)9" (228.60mm)N/A30004000N/A4.5
20150240MMM20150mmB336.55mm100mm38.1280mmN/AN/A8000N/A
24150260mmM24150mmA400mm100mm50mm300mmN/AN/A18680N/A
24160240mmM24160mmB366.55mm100mm46mm287mmN/AN/A13200N/A
24180240mmM24180mmB336.55mm100mm46mm285mmN/AN/A13200N/A
24190270mmM24190mmB400mm100mm50mm318mmN/AN/A18680N/A

8 Bolt

Eight bolt couplings are used on eight bolt hole output flanges. Spigots can be either male or female, as determined by the flange. Poly Flex couplings are configured to the flanges. Some couplings may need a T bush kit or adaptor to clear obstructions, these can be supplied by Poly Flex.

Swipe or scroll right to view all table data →
ModelFlange Bolt Circle Diameter PCD (F)Flange Bolt SizeFlange Index Ring Spigot (E)Flange Index Ring TypePoly Flex Coupling OD (G)Poly Flex Coupling IDPoly Flex Coupling Thickness (A)Flange OD (C)Light Duty Rating (Nm)Medium Duty Rating (Nm)Heavy Duty Rating (Nm)Super Heavy Duty Rating (Nm)Weight (kg)Data Sheet
2308230mmM20150mmB318mm100mm38.1255mmN/AN/A8600N/A11.00
2587196mmM16140mmB240mm75mm31.75mm225mmN/AN/A5000N/A
2808280mm7/8" UNF200mmA360mm75mm50mm345mmN/AN/A12470N/A17.1
3308330.20mm1" UNF225mmB425mm130mm60mm415mmN/AN/A25100N/A25.5
3408 (31)**340mm1"UNF260mmB440mm130mm60mm400mmN/AN/A28000N/A27.5
3408340mm1" UNF180mmB460mm130mm60mm415mmN/AN/A30000N/A29.5
7608 IRM152.40mmM16 SHCS95.25mmB184.15mm75mm31.75mm152.40mmN/AN/A3810N/A3.6
8148**148mmM14 SHCS100mmA212mm60mm38.10mm200mmN/AN/A4500N/A4.6
8192192mm5/8" UNC130mmB240mm80mm38.10mm220mmN/AN/A5000N/A5.5
8196196mm5/8" UNC140mmB280mm75mm38.10mm225mmN/AN/A6500N/A6
9114 IRM**7 1/2" (190.50mm)5/8" UNC6" (152.40mm)B235mm2 7/8" (73.02mm)1 1/2" (38.10mm)9" (228.60mm)N/A4000550088005.5
9858 5/87 1/2" (190.50mm)5/8" UNC6" (152.40mm)B11" (279.40mm)3 7/8" (98.42mm)1 1/2" (38.10mm)9" (228.60mm)N/A45006500N/A5.7
9858 3/47 1/2" (190.50mm)3/4" UNF6" (152.40mm)B11" (279.40mm)3 7/8" (98.42mm)1 1/2" (38.10mm)9" (228.60mm)N/A50007000N/A6.6
9934200mm3/4" UNF110mmB280mm75mm38.10mm230mmN/AN/A7000N/A6.6
108348 3/4" (222.25mm)3/4" UNF5" (127mm)B12 1/2" (317.50mm)2 7/8" (73.02mm)1 13/16" (46.03)10 1/2" (266.70mm)N/AN/A8600N/A9.6
11834A9" (228.60mm)3/4" UNF6" (152.40mm)B11 1/4" (285.75mm)3 7/8" (98.42mm)1 13/16" (46.03)11" (279.40mm)N/AN/A8400N/A10.2
118349 1/2" (241.30mm)3/4" UNF6" (152.40mm)B13 1/4" (336.55mm)3 7/8" (98.42mm)1 13/16" (46.03)11" (279.40mm)N/AN/A9200N/A10.8
24220300mmM24220mmB400mm100mm50mm348mmN/AN/A12690N/A

10 Bolt

Ten bolt couplings are used on ten bolt hole output flanges. Spigots can be either male or female, as determined by the flange. Poly Flex couplings are configured to the flanges. Some couplings may need a T bush kit or adaptor to clear obstructions, these can be supplied by Poly Flex.

Swipe or scroll right to view all table data →
ModelFlange Bolt Circle Diameter PCD (F)Flange Bolt SizeFlange Index Ring Spigot (E)Flange Index Ring TypePoly Flex Coupling OD (G)Poly Flex Coupling IDPoly Flex Coupling Thickness (A)Flange OD (C)Light Duty Rating (Nm)Medium Duty Rating (Nm)Heavy Duty Rating (Nm)Super Heavy Duty Rating (Nm)Weight (kg)Data Sheet
8170**170mmM14 SHCS140mmB212mm75mm45mm200mmN/AN/A400085004.60
8212218mm5/8" UNC140mmA270mm75mm38.10mm250mmN/AN/A5500100006.80
9196**196mmM14 SHCS140mmB240mm75mm38.10mm220mmN/AN/A400085005.80
19510195mmM8180mmA240mm75mm27mm220mmN/A12001800N/A3.80

12 Bolt

Twelve bolt couplings are used on twelve bolt hole output flanges. Spigots can be either male or female, as determined by the flange. Poly Flex couplings are configured to the flanges. Some couplings may need a T bush kit or adaptor to clear obstructions, these can be supplied by Poly Flex.

Swipe or scroll right to view all table data →
ModelFlange Bolt Circle Diameter PCD (F)Flange Bolt SizeFlange Index Ring Spigot (E)Flange Index Ring TypePoly Flex Coupling OD (G)Poly Flex Coupling IDPoly Flex Coupling Thickness (A)Flange OD (C)Light Duty Rating (Nm)Medium Duty Rating (Nm)Heavy Duty Rating (Nm)Super Heavy Duty Rating (Nm)Weight (kg)Data Sheet
2250**245mmM14 SHCS175mmB305mm80mm38.10mm270mmN/AN/A5500N/A9.10
3306**190mmM14 SHCS145mmB240mm80mm38.10mm225mmN/AN/A400080005.90
26012**260mm3/4" UNF SHCS150mmA340mm80mm38.10mm300mmN/AN/A65009500
29212**292.10mm3/4" UNF SHCS177.72mmB400mm80mm38.10mm340mmN/AN/A55009000

Spicer Series

Spicer or Uni-Joint couplings are used on drive shaft flanges configured to standard Spicer. Spigots can be either male or female, as determined by the flange. These coupling range from four to eight bolt couplings.

Swipe or scroll right to view all table data →
ModelFlange Bolt Circle Diameter PCD (F)Flange Bolt SizeFlange Index Ring Spigot (E)Flange Index Ring TypePoly Flex Coupling OD (G)Poly Flex Coupling IDPoly Flex Coupling Thickness (A)Flange OD (C)Light Duty Rating (Nm)Medium Duty Rating (Nm)Heavy Duty Rating (Nm)Super Heavy Duty Rating (Nm)Weight (kg)Data Sheet
4843 1/8" (79.37mm)(4) 3/8" UNF (Rect)2 3/8" (60.32mm)A5" (127mm)1 1/2" (38.10mm)1" (25.4mm)3 13/16" (96.83mm)171309486N/A0.80
5453 3/4" (95.25mm)(4) 7/16" UNF (Rect)2 3/4" (69.85mm)A5 9/32" (134.14mm)2" (50.80mm)1 1/4" (31.75mm)4 9/16" (115.88mm)260335563N/A1.2
5473 3/4" (95.25mm)(4) 7/16" UNF (Rect)2 3/4" (69.85mm)A6" (152.40mm)2" (50.80mm)1 1/4" (31.75mm)4 9/16" (115.88mm)3003756039101.3
15405 1/8" (130.09mm)(4) 1/2" UNF (Rect)3 35/64" (89.99mm)A7" (177.80mm)2" (50.80mm)1 7/16" (36.50mm)5 3/4" (146.05mm)3606701200N/A2.1
15504 3/4" (120.65mm)(4) 1/2" UNF (Rect)3 3/4" (95.25mm)A7" (177.80mm)2" (50.80mm)1 7/16" (36.50mm)5 3/4" (146.05mm)360670120017002.1
16006 1/8" (155.57mm)(8) 3/8" UNF (45deg)6 5/8" (168.27)A8 1/2" (215.90mm)2 23/64" (59.99mm)1" (25.40mm)6 7/8" (174.62mm)N/A15362152N/A1.8
17007 1/4" (184.15mm)(8) 3/8" UNF (45deg)7 3/4" (196.85mm)A9 1/2" (241.30mm)3" (76.20mm)1" (25.40mm)9" (228.60mm)N/A16902370N/A2.2

Coupling Specs

The Poly Flex flexible drive 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 our couplings are machined on a purpose built flange jigs and have a maximum runout of (0.002″ or 0.05mm). Spigots are machined to tolerance within (+/- 0.002″ or +/- 0.05mm). To ensure maximum strength, durability and performance of your flexible coupling strict installation guidelines must be followed which are included with each coupling sold by Poly Flex. The table below (table 1a) is a guide for the recommended torque ratings for the bolts used that screw into our couplings.

Note: Over-tensioning of the bolts that screw into the coupling during assembly may cause internal damage to the Poly Flex coupling and therefore will result in a coupling that will not function properly as it is designed to do so. Poly Flex couplings are sold with anti-seize applied to the thread of the inserted bolts to ensure easy maintenance and removal.

Note: If anti-seize is removed, bolts will seize up over time.

Coupling Bolt Size
Recommended Torque Settings
High Tensile Grade
  ft-lbs Nm  
Metric
8mm 12 16 8.8
10mm 24 32 8.8
12mm 40 54 8.8
14mm 45 60 8.8
16mm 45 60 8.8
20mm 70 95 8.8
24mm 88 120 8.8
27mm 110 150 8.8
3/8″ 24 32 Gr5
Imperial
7/16″ 35 48 Gr5
1/2″ 40 54 Gr8
5/8″ 45 60 Gr8
3/4″ 65 88 Gr8
7/8″ 80 108 Gr8
1″ 90 122 Gr8

Electrical Isolation

All Poly Flex couplings electrically isolate the shaft and propeller from the engine/gearbox. This can be rectified by installing a shaft strap.

General Maintenance

Misalignment increases stresses on the drive train (gearbox), which decreases the capacity and life of the coupling and causes premature wear of the stern bearings. If the engine is mounted on rubber mounts it is recommended that the alignment is checked every 6 months due to the design and materials used in rubber mounts, which tend to settle. Check every 12 months if the engine is sitting on Poly Flex mounts. Alignment must be carried out while the vessel is in the water and with the flexible coupling removed.

Coupling Cross Reference

Coupling Cross Reference
Globe Drivesaver to Poly Flex
Drivesaver Poly Flex   Drivesaver Poly Flex
303 N/A   1058 10834-4-95
353 N/A   1058PR 10834-4-95
354 N/A      
      1108 11834-4-95
404 N/A   1108A 11834A-4-95
404A 434-4-90 or 95      
404AC 434P-4-90 or 95   1308 N/A
404V 464-4-90 or 95      
404S N/A   4756 546IRM-4-95
424Y 424-4-90      
4756 546-4-95   5756 616 1/2″B-4-95
4756A 546IRM-4-95   5756A 616 1/2″A-4-95
4756APR 546IRM-4-80D   5756APR 616 1/2″A-4-80D
4756PR 546IRM-4-80D   5756AZF 616 1/2″-4-95 (F & F)
454 434P-4-90 or 95   5756AZFPR 616 1/2″-4-80D (F & F)
      5756B 616 5/8″-4-95
504 524-4-90 or 95      
504A 514-4-90 or 95   6256PR 636-4-95
504AC 514-4-90 or 95      
504APR 514-4-80D   7256 7206 5/8″-4-95
504H 524IRM-4-95   7256PR 7206 5/8″-4-80D
504HPR 524IRM-4-80D   7256ZPR 7608IRM-4-95
504PR 524-4-80D      
524Y 534IRM-4-95   7306Z 7606IRM-4-95
554 N/A      
554PR N/A   8010Z 8170-4-95
      8010ZPR 8170-4-80D
908 9858 5/8″ or 3/4″-4-95   8078Z N/A
908A N/A   8858ZPR 8196-4-95
908PR 9858 5/8″ or 3/4″-4-95      
908S 9114-4-95      
908AC 9114-4-80D      
Always Remember To Check Torque Ratings
Coupling Cross Reference
R & D to Poly Flex
R & D Poly Flex   R & D Poly Flex
RA900-003 546-4-95   910-035 N/A
910-001 434-4-90 or 95   910-036 N/A
910-002 424-4-90   910-037 524-4-90 or 95
910-003 616 1/2″-4-95   910-038 N/A
910-004 434-4-90 or 95   910-039 7606IRM-4-95 + Bush Kit
910-005 434P-4-90 or 95   910-040 7606IRM-4-95
910-006 616 5/8″-4-95      
910-007 464-4-90 or 95   910-041 N/A
910-009 524-4-90 or 95   910-042 24160-4-95
      910-043 424-4-90
910-012 534-4-90 or 95   910-044 524-4-90 or 95
910-013 494-4-90   910-045 N/A
910-014 434-4-90 or 95   910-046 9858 3/4″-4-95
910-015 N/A   910-047 20150-4-95
910-016 N/A   910-048 9858 3/4″-4-95 + Bush Kit
910-017 7606IRM-4-95 + Bush Kit   910-049 8170-4-95 + Bush Kit
910-018 7606IRM-4-95      
910-019 464-4-90 or 95   910-050 9114-4-95 + Bush Kit
      910-051 11834-4-95
910-020 464-4-90 or 95   910-052 546-4-95
910-021 N/A   910-053 2206-4-95
910-022 9114-4-95 + Bush Kit   910-054 616 1/2″-4-95
910-024 10834-4-95 + Bush Kit   910-055 434-4-95
910-025 616 1/2″-4-95   910-057 524-4-80D
910-026 616 5/8″ or 656-4-95   910-058 7306-4-95
910-027 8196-4-95   910-059 464-4-90 or 95
910-028 494-4-90      
910-029 524-4-90, 95, 80D   910-060 N/A
910-030 N/A   910-061 524-4-95
      910-062 6170-4-95
910-032 616 1/2″A-4-95   910-063 616 1/2″-4-95
910-033 616 5/8″ or 656-4-95   910-064 7206 5/8″-4-95
910-034 524-4-95   910-068 424-4-90
Always Remember To Check Torque Ratings
Note: Due to design parameters, R & D couplings are sometimes quite a bit thicker than the comparable Poly Flex Coupling. Please note these differences and check drawings before ordering. Installing the Poly Flex Coupling may require other modifications to drive line components.
Coupling Cross Reference
Isoflex to Poly Flex
Isoflex Poly Flex   Isoflex Poly Flex
IC-3100-95 305-12   IFC-6400-HT 7606IRM-4-80D + Bush Kit
IC-3200-95 305-14   IFC-6400-95 7606IRM-4-80D + Bush Kit
IC-3300-95 306D   IFC-6500-95 2306-4-95
      IFC-6600-95 2056-4-95 + Bush Kit
IFC-4200-90 424-4-90      
IFC-4300-SP 434P-4-90 or 95   IFC-8100-HT 9858 5/8″ or 3/4″-4-80D
IFC-4300-95 434-4-90 or 95   IFC-8100-95 9858 5/8″ or 3/4″-4-95
IFC-4400-95 534-4-90 or 95   IFC-8200-HT 9114IRM-4-80D
IFC-4500-HT 524-4-80D   IFC-8200-95 9114IRM-4-95
IFC-4500IV-HT 524-4-80D   IFC-8300-95 7608IRM-4-95 + Bush Kit
IFC-4500-95 524-4-90 or 95   IFC-8400-HT 9934-4-80D
IFC-4550-HT 524-4-80D   IFC-8400-95 9934-4-95
IFC-4550-95 524-4-95   IFC-8534-95 10834-4-95
IFC-4600-95 464-4-90 or 95   IFC-8600-95 2308-4-95
IFC-4700-95 547-4-90 or 95   IFC-8690-95 11834A-4-95
IFC-4800-95 484-4-90 or 95   IFC-8695-HT 11834-4-80D
IFC-4900-95 1550-4-95   IFC-8695-95 11834-4-95
      IFC-8700-95 2808-4-95
IFC-6000-HT 546IRM-4-80D   IFC-8800-95 3408-4-95
IFC-6000-95 546IRM-4-95   IFC-8900-95 24220-4-95 (180 Spigot)
IFC-6100IV-HT 616 1/2″B-4-80D   IFC-81610-HT 1600-4-80D
IFC-6100-HT 616 1/2″B-4-80D   IFC-81710-HT 1700-4-80D
IFC-6100-95 616 1/2″B-4-95      
IFC-6125-95 616 1/2″A-4-95   IFC-10325-HT 8170-4-80D
IFC-6150-HT 616 5/8″-4-80D      
IFC-6150-95 616 5/8″-4-95   IFC-4700-95 547-4-90, 95, 80D
IFC-6155-HT 656-4-80D   IFC-4800-95 484-4-90 or 95
IFC-6155-95 656-4-95   IFC-4900-95 1550-4-95
IFC-6300IV-HT 7206 5/8″ or 3/4″-4-80D   IFC-81610-HT 1600-4-80D
IFC-6300-HT 7206 5/8″ or 3/4″-4-80D   IFC-81710-HT 1700-4-80D
IFC-6300-95 7206 5/8″ or 3/4″-4-95      
Always Remember To Check Torque Ratings

Transmission Cross Reference

Transmission Cross Reference
Manufactuer Poly Flex   Manufactuer Poly Flex
ARONA   DONG I Cont
Arona 303   198mm Flange  
ADVANCE   DMT 110A 6170
Gear 100 566 + Adaptor   DMT 130AL 6170
Gear 135 10834 + Bush Kit   DMT 140H 6170
ALLISON   218mm Flange  
7 1/4″ Flange     DMT 144 2206
M 7206 5/8″   DMT 150H 2206
9″ Flange     DMTP 5100 2206
M25 9858 5/8″   DMTP 5100X 2206
MH 9858 3/4″   230mm Flange  
BORG WARNER   DMT 135HL 6196
4″ Flange     257mm Flange  
BW 70C 434   DMT 190H 2586
BW 71C 434   DMT 200H 2586
BW 500 434   DMT 240H 2586
BW 1000 434   278mm Flange  
BW 1500 434   DMT 260H 20150
5″ Flange     DMT 280H 20150
BW 71C 524   285mm Flange  
BW 72C 524   DMT 400H 24180
BW 1000 524   DMT 550H 24180
Velvet Drive 5000A 524   287mm Flange  
6″ Flange     DMT 170HL 24160
BW 73C 616 1/2″ B   DMT 180HL 24160
BW 7000 616 1/2″ B   DMT 220DL 24160
Note: Borg Warner is now part of ZF Group   318mm Flange  
BUKH   DMT 190HL 24190
4″ Flange     DMT 200HL 24190
4 Bolt 494   DMT 260HL 24190
CAPITOL   DMT 280HL 24190
7700 and many others 9858   DMT 300HL 24190
CMC   DMT 330DL 24190
125mm Flange     DMTP 7500 24190
CMC 566   320mm Flange  
DONG I   DMT 430H 24150
112mm Flange     348mm Flange  
DMT 25AL 490   DMT 400HL 24220
157.5mm Flange     DMT 450DL 24220
DMT 50A 4128   DMT 460HL 24220
DMT 50T 4128   DMT 560HL 24220
177.5mm Flange     DMT 561HL 24220
DMT 70T 7306A   DMT 600DL 24220
DMT 90A 7306A   DMTP 6500 24220
DMT 95H 7306A   400mm Flange  
DMT 100T 7306A   DMT 600BL 3408(31)
DMT 100IV 7306A      
THE ABOVE IS A GUIDE ONLY. Please check with Manufacturer.
Transmission Cross Reference
Manufactuer Poly Flex   Manufactuer Poly Flex
LEVI DRIVE   PARAGON
8000 Series 2308   4″ Flange  
HARDY SPICER UNI JOINTS   P13 434P
1310 484   200 434P
1350 545 or 547   300 434P
1410 545 or 547   5″ Flange  
1480 1550   PM 514
1510 1550   PMB 514
1550 1550   PL 514
1610 1600   P15 514
1710 1700   6″ Flange  
MB-2-158 1540   RC Series 636
NEWAGE PRM   RUGERINI
4″ Flange     Rugerini 303
Delta 434   ROLCO
PRM 80 434   Rolco Rolco 3
PRM 120 434   SAAB
PRM 150 434   Saab 454
5″ Flange     TECHNODRIVE
PRM 101 524   4″ Flange  
PRM 140 524   TMC 30 434
PRM 160 524   TMC 40P 434
PRM 260 524   TMC 50 434
PRM 602 524   TMC 60 434
6″ Flange     TMC 60E 434
PRM 175 616 1/2″ A   TMC 80 434
PRM 260 616 1/2″ A   TM 260 434
PRM 265 616 1/2″ A   5″ Flange  
PRM 301 616 1/2″ A   TMC 93 524
PRM 302 616 1/2″ A   TMC 93A 524
PRM 310 616 1/2″ A   TMC 170 524
PRM 401 616 1/2″ A   TMC 170A 524
PRM 402 616 1/2″ A   TMC 260 524
PRM 500 616 1/2″ A   TMC 345 524 IRM
PRM 601 (3:1) 616 1/2″ A   TMC 345A 524 IRM
PRM 750 616 5/8″   TMC 485A 524 IRM
PRM 1000 (3:1) 616 5/8″   TMC 545A 524
7 1/4″ Flange     TM 880A 524
PRM 601 (4:1) 7206 5/8″   6″ Flange  
PRM 1000 (4:1) 7206 5/8″   TM 130B 616 5/8″
PRM 1200 SC 7206 5/8″   TM 260 616 5/8″
PRM 1500 SC 7206 5/8″   TM 265 616 5/8″
PRM 1750 SC 7206 5/8″   TM 265A 616 5/8″
10 1/2″ Flange     TM 1200A 7608 IRM + Bush Kit
PRM 1200 DC 10834 + Bush Kit (25.4)   7 3/4″ Flange  
PRM 1500 DC 10834 + Bush Kit (25.4)   TMC 200B 7206 5/8″
PRM 1750 DC 10834 + Bush Kit (25.4)      
THE ABOVE IS A GUIDE ONLY. Please check with Manufacturer.
Transmission Cross Reference
Manufactuer Poly Flex   Manufactuer Poly Flex
TECHNODRIVE (Cont)   TWIN DISC (Cont)
9″ Flange     7 1/4″ Flange  
TM 360 9934 (Check OD)   MG 506 DC 7206 3/4″
TMP   MG 507-1 7206 3/4″
1200 524 IRM   MG 507-1 SC 7206 3/4″
TWIN DISC   MG 507-2 SC 7206 3/4″
4″ Flange     MG 507 A-2 7206 3/4″
MG 340 434   MG 509 SC 7206 3/4″
MG 360 434   MG 509 DC 7206 3/4″
MG 5010 SC 434   MG 509 CP 7206 3/4″
MG 5011 SC 434   MG 5065A 7606 IRM + Bush Kit
MG 5010 V 434   MG 5065 SC 7606 IRM + Bush Kit
4 3/4″ Flange     MG 5075 A 7206 3/4″
MG 502 546   MG 5075 SC 7206 3/4″
MG 502-1 546   MG 5075 IV 7206 3/4″
MG 502A 546 IRM   MG 5081 7606 IRM + Bush Kit
MG 502V 546   MG 5081 A 7606 IRM + Bush Kit
5″ Flange     MG 5081 SC 7606 IRM + Bush Kit
MG 5005 A 524   MG 5082 A 7206 3/4″
MG 5010 A 524 IRM   MG 5082 SC 7206 3/4″
MG 5011 A 524 IRM   MG 5085 7206 3/4″
MG 5011 SC 524 IRM   MG 5085 A 7206 3/4″
MG 5012 SC 524   MG 5085 SC 7206 3/4″
MG 5015 A 524   MG 5090 A 7206 3/4″
MG 5020 SC 524   MG 5090 SC 7206 3/4″
MG 5055 A 524   MG 5091 7206 3/4″
6″ Flange     MG 5091 A 7206 3/4″
MG 506 616 5/8″   MG 5095 A 7606 IRM + Bush Kit
MG 506-1 616 5/8″   MGX 5095 A 7606 IRM + Bush Kit
MG 506-1A 616 5/8″   MGX 5095 SC 7606 IRM + Bush Kit
MG 506 SC 616 5/8″   9″ Scalloped Flange  
MG 507 616 5/8″   MG 5111 SC 9114 (3+3) + Bush Kit
MG 507 A-1 616 5/8″   MG 5114 SC 9114 (3+3) + Bush Kit
MG 507-2 616 5/8″   9″ Flange  
MG 507 A-2 616 5/8″   MG 510 9858 3/4″ + Bush Kit
MG 5010 DC 616 5/8″   MG 510 A 9858 3/4″ + Bush Kit
MG 5050 656   MG 510 SC 9858 3/4″ + Bush Kit
MG 5050 A 656   MG 514 U 9858 3/4″ + Bush Kit
MG 5050 SC 656   MG 514 CU 9858 3/4″ + Bush Kit
MG 5050 V 616 5/8″   MG 5111A 9114 + Bush Kit
MG 5061 616 5/8″   MG 5111 V 9114 + Bush Kit
MG 5061 A 656   MG 5114 A 9114 + Bush Kit
MG 5061 SC 616 5/8″   MG 5114 V 9114 + Bush Kit
MG 5061 V 616 5/8″   MG 5135 A 9114 + Bush Kit
MG 5062 V 616 5/8″   MG 5145 A 9934 + Bush Kit
MGX 5065 A 656   MGX 5145 A 9934 + Bush Kit
      MGX 5147 A 9934
THE ABOVE IS A GUIDE ONLY. Please check with Manufacturer.
Transmission Cross Reference
Manufactuer Poly Flex   Manufactuer Poly Flex
Twin Disc (Cont)   YANMAR / KANSAKI (Cont)
10 1/2″ Flange     4″ Flange  
MG 509 DC 10834 + Bush Kit (25.4)   30 H 424
MG 510 DC 10834 + Bush Kit (25.4)   30 G 424
MG 511 10834 + Bush Kit (25.4)   KBW 10 424
MG 512 10834 + Bush Kit (25.4)   KM 2 P-1 424
MG 513 10834 + Bush Kit (25.4)   KM 35 A-2 424
MG 514 SC 10834 + Bush Kit (25.4)   KM 35 P 424
MG 514 DC 10834 + Bush Kit (25.4)   5″ Flange  
MG 5091 DC 10834 + Bush Kit (25.4)   30 G 534
MG 5111 DC 10834 + Bush Kit (25.4)   30 H 534
MG 5113 10834 + Bush Kit (25.4)   30 M 534
MG 5114DC 10834 + Bush Kit (25.4)   KBW 20 534
VOLVO   KBW 21 534
4″ Flange     KM 4 534
MD 10 A 464   KMH 4 534 IRM
MD 38 464   KMH 4 A 534 IRM
MD 7 A 464   KM 4 A-2 534 IRM
MD 11 C 464   KMH 40 524
2000 Series 464   KMH 50 A 524 IRM
MS 2 464   KMH 50 V 524 IRM
MS 10 464   YX 30-2 556
MS 15 464   5 1/2″ Flange  
MS 25 464   KM 5 524 IRM
RB 464   KM 5 A 524 IRM
5″ Flange     LH Series 524
MS 524   6″ Flange  
MS 3 524   KMH 60 A 656
MS 4 524   KMH 61 A 656
MS 4 A 524   KMH 60 V 616 5/8″
MS 5 524   7″ Flange  
HS 25 A 524   YX 71-4 6146
HS 45 A 524   8 3/4″ Flange  
HS 63 A 524   YP 50 LE 7506
YANMAR / KANSAKI   YP 60 LP 7506
4″ Flange     YX 120 8192
YSE 8 424   9 1/4″ Flange  
YSME 8 424   YXH 160 2056 + Bush Kit
YSBE 8 424   12 1/2″ Flange  
YSE 12 424   YXH 180 2306
YSMW 12 424   YXH 240 2306
YSBE 12 424      
20 M 424      
20 H 424      
20 G 424      
JH-2-TF 424      
30M 424      
THE ABOVE IS A GUIDE ONLY. Please check with Manufacturer.
Transmission Cross Reference
Manufactuer Poly Flex   Manufactuer Poly Flex
ZF / HURTH   ZF / HURTH (Cont)
HBW HSW ZF     HSW IRM ZF  
4″ Flange     4 3/4″ Flange  
5     434     220A-1 220A 546 IRM
10     434       220 546
35     434       220V 546
40   4M 434       225A 546 IRM
50   5M 434   HSW IRM ZF  
100   10M 434   6″ Flange  
  125H 12 434       45-1 616 1/2″ A
125   12M 434   800A     616 1/2″ A
  150 15M 434   800A2   80A  
  150A 15MA 434   800A3   80-1A  
    15MIV 434   800V1   80IV 616 1/2″ A
  220   434   800V2   80-1IV 616 1/2″ A
  250 25M 434       85 616 5/8″
  250A 25A 434 + Spacer       85A 616 5/8″
  250H 25 434       85IV 616 5/8″
    25MA 434     220PL 220 656
    30M 434     220V-2   616 1/2″ A
    45A 434       220IV 616 1/2″ A
  450D 45C 434       280 616 5/8″
Din PCD 404       280A 616 5/8″
SAE PCD 434     280V-LD 280-1 616 5/8″
HBW HSW ZF         280-1A 616 5/8″
5″ Flange       280PL 280IV 616 5/8″
360     524       285A 616 5/8″
360A     524       285IV 616 5/8″
400     524       286IV 616 5/8″
450 450H2 45-1 524       300TS 616 5/8″
  450A2 45A 524 IRM       300-1TS 616 5/8″
  450D 45C 524       300ATS 616 5/8″
    50A2 524       300-1ATS 616 5/8″
    50A3 524       300VTS 616 5/8″
  600   524     301A-2 301A 616 5/8″
  630   524     301PL-2 301C 616 5/8″
  630H1 63 524     300VTS 300-1VTS 616 5/8″
  630A1 63A 524       110ATS 616 5/8″
  630D 63C 524       110IVTS 616 1/2″ A
    63IV 524     IRM ZF  
  630V   524   8″ Flange  
    88C 524     311PL 311 8170 + Bush Kit
    90TS 524       325A (V) 8170 + Bush Kit
    90ATS 524     350PL-2 350 8170 + Bush Kit
    110TS 524     350A-2 350A 8170 + Bush Kit
    901VTS 524     350PL-1   8170 + Bush Kit
            350A-1   8170 + Bush Kit
THE ABOVE IS A GUIDE ONLY. Please check with Manufacturer.
Transmission Cross Reference
Manufactuer Poly Flex   Manufactuer Poly Flex
ZF / HURTH (Cont)          
  IRM ZF            
8″ Flange            
    350TS 8170 + Bush Kit          
    350ATS 8170 + Bush Kit          
    350V 8170 + Bush Kit          
  350V-LD 350IV 8170 + Bush Kit          
    550A 8170 + Bush Kit          
    665 8170 + Bush Kit          
    665A 8170 + Bush Kit          
    665V 8170 + Bush Kit          
    ZF            
8 3/4″ Flange            
    3000 3306 + Bush Kit          
    3050 3306 + Bush Kit          
    3060 3306 + Bush Kit          
    3060A 3306 + Bush Kit          
    3060V 3306 + Bush Kit