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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.

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.

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
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-lbsNm 
Metric
8mm12168.8
10mm24328.8
12mm40548.8
14mm45608.8
16mm45608.8
20mm70958.8
24mm881208.8
27mm1101508.8
3/8″2432Gr5
Imperial
7/16″3548Gr5
1/2″4054Gr8
5/8″4560Gr8
3/4″6588Gr8
7/8″80108Gr8
1″90122Gr8

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
DrivesaverPoly Flex DrivesaverPoly Flex
303N/A 105810834-4-95
353N/A 1058PR10834-4-95
354N/A   
   110811834-4-95
404N/A 1108A11834A-4-95
404A434-4-90 or 95   
404AC434P-4-90 or 95 1308N/A
404V464-4-90 or 95   
404SN/A 4756546IRM-4-95
424Y424-4-90   
4756546-4-95 5756616 1/2″B-4-95
4756A546IRM-4-95 5756A616 1/2″A-4-95
4756APR546IRM-4-80D 5756APR616 1/2″A-4-80D
4756PR546IRM-4-80D 5756AZF616 1/2″-4-95 (F & F)
454434P-4-90 or 95 5756AZFPR616 1/2″-4-80D (F & F)
   5756B616 5/8″-4-95
504524-4-90 or 95   
504A514-4-90 or 95 6256PR636-4-95
504AC514-4-90 or 95   
504APR514-4-80D 72567206 5/8″-4-95
504H524IRM-4-95 7256PR7206 5/8″-4-80D
504HPR524IRM-4-80D 7256ZPR7608IRM-4-95
504PR524-4-80D   
524Y534IRM-4-95 7306Z7606IRM-4-95
554N/A   
554PRN/A 8010Z8170-4-95
   8010ZPR8170-4-80D
9089858 5/8″ or 3/4″-4-95 8078ZN/A
908AN/A 8858ZPR8196-4-95
908PR9858 5/8″ or 3/4″-4-95   
908S9114-4-95   
908AC9114-4-80D   
Always Remember To Check Torque Ratings
Coupling Cross Reference
R & D to Poly Flex
R & DPoly Flex R & DPoly Flex
RA900-003546-4-95 910-035N/A
910-001434-4-90 or 95 910-036N/A
910-002424-4-90 910-037524-4-90 or 95
910-003616 1/2″-4-95 910-038N/A
910-004434-4-90 or 95 910-0397606IRM-4-95 + Bush Kit
910-005434P-4-90 or 95 910-0407606IRM-4-95
910-006616 5/8″-4-95   
910-007464-4-90 or 95 910-041N/A
910-009524-4-90 or 95 910-04224160-4-95
   910-043424-4-90
910-012534-4-90 or 95 910-044524-4-90 or 95
910-013494-4-90 910-045N/A
910-014434-4-90 or 95 910-0469858 3/4″-4-95
910-015N/A 910-04720150-4-95
910-016N/A 910-0489858 3/4″-4-95 + Bush Kit
910-0177606IRM-4-95 + Bush Kit 910-0498170-4-95 + Bush Kit
910-0187606IRM-4-95   
910-019464-4-90 or 95 910-0509114-4-95 + Bush Kit
   910-05111834-4-95
910-020464-4-90 or 95 910-052546-4-95
910-021N/A 910-0532206-4-95
910-0229114-4-95 + Bush Kit 910-054616 1/2″-4-95
910-02410834-4-95 + Bush Kit 910-055434-4-95
910-025616 1/2″-4-95 910-057524-4-80D
910-026616 5/8″ or 656-4-95 910-0587306-4-95
910-0278196-4-95 910-059464-4-90 or 95
910-028494-4-90   
910-029524-4-90, 95, 80D 910-060N/A
910-030N/A 910-061524-4-95
   910-0626170-4-95
910-032616 1/2″A-4-95 910-063616 1/2″-4-95
910-033616 5/8″ or 656-4-95 910-0647206 5/8″-4-95
910-034524-4-95 910-068424-4-90
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
IsoflexPoly Flex IsoflexPoly Flex
IC-3100-95305-12 IFC-6400-HT7606IRM-4-80D + Bush Kit
IC-3200-95305-14 IFC-6400-957606IRM-4-80D + Bush Kit
IC-3300-95306D IFC-6500-952306-4-95
   IFC-6600-952056-4-95 + Bush Kit
IFC-4200-90424-4-90   
IFC-4300-SP434P-4-90 or 95 IFC-8100-HT9858 5/8″ or 3/4″-4-80D
IFC-4300-95434-4-90 or 95 IFC-8100-959858 5/8″ or 3/4″-4-95
IFC-4400-95534-4-90 or 95 IFC-8200-HT9114IRM-4-80D
IFC-4500-HT524-4-80D IFC-8200-959114IRM-4-95
IFC-4500IV-HT524-4-80D IFC-8300-957608IRM-4-95 + Bush Kit
IFC-4500-95524-4-90 or 95 IFC-8400-HT9934-4-80D
IFC-4550-HT524-4-80D IFC-8400-959934-4-95
IFC-4550-95524-4-95 IFC-8534-9510834-4-95
IFC-4600-95464-4-90 or 95 IFC-8600-952308-4-95
IFC-4700-95547-4-90 or 95 IFC-8690-9511834A-4-95
IFC-4800-95484-4-90 or 95 IFC-8695-HT11834-4-80D
IFC-4900-951550-4-95 IFC-8695-9511834-4-95
   IFC-8700-952808-4-95
IFC-6000-HT546IRM-4-80D IFC-8800-953408-4-95
IFC-6000-95546IRM-4-95 IFC-8900-9524220-4-95 (180 Spigot)
IFC-6100IV-HT616 1/2″B-4-80D IFC-81610-HT1600-4-80D
IFC-6100-HT616 1/2″B-4-80D IFC-81710-HT1700-4-80D
IFC-6100-95616 1/2″B-4-95   
IFC-6125-95616 1/2″A-4-95 IFC-10325-HT8170-4-80D
IFC-6150-HT616 5/8″-4-80D   
IFC-6150-95616 5/8″-4-95 IFC-4700-95547-4-90, 95, 80D
IFC-6155-HT656-4-80D IFC-4800-95484-4-90 or 95
IFC-6155-95656-4-95 IFC-4900-951550-4-95
IFC-6300IV-HT7206 5/8″ or 3/4″-4-80D IFC-81610-HT1600-4-80D
IFC-6300-HT7206 5/8″ or 3/4″-4-80D IFC-81710-HT1700-4-80D
IFC-6300-957206 5/8″ or 3/4″-4-95   
Always Remember To Check Torque Ratings

Transmission Cross Reference

Transmission Cross Reference
ManufactuerPoly Flex ManufactuerPoly Flex
ARONA DONG I Cont
Arona303 198mm Flange 
ADVANCE DMT 110A6170
Gear 100566 + Adaptor DMT 130AL6170
Gear 13510834 + Bush Kit DMT 140H6170
ALLISON 218mm Flange 
7 1/4″ Flange  DMT 1442206
M7206 5/8″ DMT 150H2206
9″ Flange  DMTP 51002206
M259858 5/8″ DMTP 5100X2206
MH9858 3/4″ 230mm Flange 
BORG WARNER DMT 135HL6196
4″ Flange  257mm Flange 
BW 70C434 DMT 190H2586
BW 71C434 DMT 200H2586
BW 500434 DMT 240H2586
BW 1000434 278mm Flange 
BW 1500434 DMT 260H20150
5″ Flange  DMT 280H20150
BW 71C524 285mm Flange 
BW 72C524 DMT 400H24180
BW 1000524 DMT 550H24180
Velvet Drive 5000A524 287mm Flange 
6″ Flange  DMT 170HL24160
BW 73C616 1/2″ B DMT 180HL24160
BW 7000616 1/2″ B DMT 220DL24160
Note: Borg Warner is now part of ZF Group 318mm Flange 
BUKH DMT 190HL24190
4″ Flange  DMT 200HL24190
4 Bolt494 DMT 260HL24190
CAPITOL DMT 280HL24190
7700 and many others9858 DMT 300HL24190
CMC DMT 330DL24190
125mm Flange  DMTP 750024190
CMC566 320mm Flange 
DONG I DMT 430H24150
112mm Flange  348mm Flange 
DMT 25AL490 DMT 400HL24220
157.5mm Flange  DMT 450DL24220
DMT 50A4128 DMT 460HL24220
DMT 50T4128 DMT 560HL24220
177.5mm Flange  DMT 561HL24220
DMT 70T7306A DMT 600DL24220
DMT 90A7306A DMTP 650024220
DMT 95H7306A 400mm Flange 
DMT 100T7306A DMT 600BL3408(31)
DMT 100IV7306A   
THE ABOVE IS A GUIDE ONLY. Please check with Manufacturer.
Transmission Cross Reference
ManufactuerPoly Flex ManufactuerPoly Flex
LEVI DRIVE PARAGON
8000 Series2308 4″ Flange 
HARDY SPICER UNI JOINTS P13434P
1310484 200434P
1350545 or 547 300434P
1410545 or 547 5″ Flange 
14801550 PM514
15101550 PMB514
15501550 PL514
16101600 P15514
17101700 6″ Flange 
MB-2-1581540 RC Series636
NEWAGE PRM RUGERINI
4″ Flange  Rugerini303
Delta434 ROLCO
PRM 80434 RolcoRolco 3
PRM 120434 SAAB
PRM 150434 Saab454
5″ Flange  TECHNODRIVE
PRM 101524 4″ Flange 
PRM 140524 TMC 30434
PRM 160524 TMC 40P434
PRM 260524 TMC 50434
PRM 602524 TMC 60434
6″ Flange  TMC 60E434
PRM 175616 1/2″ A TMC 80434
PRM 260616 1/2″ A TM 260434
PRM 265616 1/2″ A 5″ Flange 
PRM 301616 1/2″ A TMC 93524
PRM 302616 1/2″ A TMC 93A524
PRM 310616 1/2″ A TMC 170524
PRM 401616 1/2″ A TMC 170A524
PRM 402616 1/2″ A TMC 260524
PRM 500616 1/2″ A TMC 345524 IRM
PRM 601 (3:1)616 1/2″ A TMC 345A524 IRM
PRM 750616 5/8″ TMC 485A524 IRM
PRM 1000 (3:1)616 5/8″ TMC 545A524
7 1/4″ Flange  TM 880A524
PRM 601 (4:1)7206 5/8″ 6″ Flange 
PRM 1000 (4:1)7206 5/8″ TM 130B616 5/8″
PRM 1200 SC7206 5/8″ TM 260616 5/8″
PRM 1500 SC7206 5/8″ TM 265616 5/8″
PRM 1750 SC7206 5/8″ TM 265A616 5/8″
10 1/2″ Flange  TM 1200A7608 IRM + Bush Kit
PRM 1200 DC10834 + Bush Kit (25.4) 7 3/4″ Flange 
PRM 1500 DC10834 + Bush Kit (25.4) TMC 200B7206 5/8″
PRM 1750 DC10834 + Bush Kit (25.4)   
THE ABOVE IS A GUIDE ONLY. Please check with Manufacturer.
Transmission Cross Reference
ManufactuerPoly Flex ManufactuerPoly Flex
TECHNODRIVE (Cont) TWIN DISC (Cont)
9″ Flange  7 1/4″ Flange 
TM 3609934 (Check OD) MG 506 DC7206 3/4″
TMP MG 507-17206 3/4″
1200524 IRM MG 507-1 SC7206 3/4″
TWIN DISC MG 507-2 SC7206 3/4″
4″ Flange  MG 507 A-27206 3/4″
MG 340434 MG 509 SC7206 3/4″
MG 360434 MG 509 DC7206 3/4″
MG 5010 SC434 MG 509 CP7206 3/4″
MG 5011 SC434 MG 5065A7606 IRM + Bush Kit
MG 5010 V434 MG 5065 SC7606 IRM + Bush Kit
4 3/4″ Flange  MG 5075 A7206 3/4″
MG 502546 MG 5075 SC7206 3/4″
MG 502-1546 MG 5075 IV7206 3/4″
MG 502A546 IRM MG 50817606 IRM + Bush Kit
MG 502V546 MG 5081 A7606 IRM + Bush Kit
5″ Flange  MG 5081 SC7606 IRM + Bush Kit
MG 5005 A524 MG 5082 A7206 3/4″
MG 5010 A524 IRM MG 5082 SC7206 3/4″
MG 5011 A524 IRM MG 50857206 3/4″
MG 5011 SC524 IRM MG 5085 A7206 3/4″
MG 5012 SC524 MG 5085 SC7206 3/4″
MG 5015 A524 MG 5090 A7206 3/4″
MG 5020 SC524 MG 5090 SC7206 3/4″
MG 5055 A524 MG 50917206 3/4″
6″ Flange  MG 5091 A7206 3/4″
MG 506616 5/8″ MG 5095 A7606 IRM + Bush Kit
MG 506-1616 5/8″ MGX 5095 A7606 IRM + Bush Kit
MG 506-1A616 5/8″ MGX 5095 SC7606 IRM + Bush Kit
MG 506 SC616 5/8″ 9″ Scalloped Flange 
MG 507616 5/8″ MG 5111 SC9114 (3+3) + Bush Kit
MG 507 A-1616 5/8″ MG 5114 SC9114 (3+3) + Bush Kit
MG 507-2616 5/8″ 9″ Flange 
MG 507 A-2616 5/8″ MG 5109858 3/4″ + Bush Kit
MG 5010 DC616 5/8″ MG 510 A9858 3/4″ + Bush Kit
MG 5050656 MG 510 SC9858 3/4″ + Bush Kit
MG 5050 A656 MG 514 U9858 3/4″ + Bush Kit
MG 5050 SC656 MG 514 CU9858 3/4″ + Bush Kit
MG 5050 V616 5/8″ MG 5111A9114 + Bush Kit
MG 5061616 5/8″ MG 5111 V9114 + Bush Kit
MG 5061 A656 MG 5114 A9114 + Bush Kit
MG 5061 SC616 5/8″ MG 5114 V9114 + Bush Kit
MG 5061 V616 5/8″ MG 5135 A9114 + Bush Kit
MG 5062 V616 5/8″ MG 5145 A9934 + Bush Kit
MGX 5065 A656 MGX 5145 A9934 + Bush Kit
   MGX 5147 A9934
THE ABOVE IS A GUIDE ONLY. Please check with Manufacturer.
Transmission Cross Reference
ManufactuerPoly Flex ManufactuerPoly Flex
Twin Disc (Cont) YANMAR / KANSAKI (Cont)
10 1/2″ Flange  4″ Flange 
MG 509 DC10834 + Bush Kit (25.4) 30 H424
MG 510 DC10834 + Bush Kit (25.4) 30 G424
MG 51110834 + Bush Kit (25.4) KBW 10424
MG 51210834 + Bush Kit (25.4) KM 2 P-1424
MG 51310834 + Bush Kit (25.4) KM 35 A-2424
MG 514 SC10834 + Bush Kit (25.4) KM 35 P424
MG 514 DC10834 + Bush Kit (25.4) 5″ Flange 
MG 5091 DC10834 + Bush Kit (25.4) 30 G534
MG 5111 DC10834 + Bush Kit (25.4) 30 H534
MG 511310834 + Bush Kit (25.4) 30 M534
MG 5114DC10834 + Bush Kit (25.4) KBW 20534
VOLVO KBW 21534
4″ Flange  KM 4534
MD 10 A464 KMH 4534 IRM
MD 38464 KMH 4 A534 IRM
MD 7 A464 KM 4 A-2534 IRM
MD 11 C464 KMH 40524
2000 Series464 KMH 50 A524 IRM
MS 2464 KMH 50 V524 IRM
MS 10464 YX 30-2556
MS 15464 5 1/2″ Flange 
MS 25464 KM 5524 IRM
RB464 KM 5 A524 IRM
5″ Flange  LH Series524
MS524 6″ Flange 
MS 3524 KMH 60 A656
MS 4524 KMH 61 A656
MS 4 A524 KMH 60 V616 5/8″
MS 5524 7″ Flange 
HS 25 A524 YX 71-46146
HS 45 A524 8 3/4″ Flange 
HS 63 A524 YP 50 LE7506
YANMAR / KANSAKI YP 60 LP7506
4″ Flange  YX 1208192
YSE 8424 9 1/4″ Flange 
YSME 8424 YXH 1602056 + Bush Kit
YSBE 8424 12 1/2″ Flange 
YSE 12424 YXH 1802306
YSMW 12424 YXH 2402306
YSBE 12424   
20 M424   
20 H424   
20 G424   
JH-2-TF424   
30M424   
THE ABOVE IS A GUIDE ONLY. Please check with Manufacturer.
Transmission Cross Reference
ManufactuerPoly Flex ManufactuerPoly Flex
ZF / HURTH ZF / HURTH (Cont)
HBWHSWZF  HSWIRMZF 
4″ Flange  4 3/4″ Flange 
5  434  220A-1220A546 IRM
10  434   220546
35  434   220V546
40 4M434   225A546 IRM
50 5M434 HSWIRMZF 
100 10M434 6″ Flange 
 125H12434   45-1616 1/2″ A
125 12M434 800A  616 1/2″ A
 15015M434 800A2 80A 
 150A15MA434 800A3 80-1A 
  15MIV434 800V1 80IV616 1/2″ A
 220 434 800V2 80-1IV616 1/2″ A
 25025M434   85616 5/8″
 250A25A434 + Spacer   85A616 5/8″
 250H25434   85IV616 5/8″
  25MA434  220PL220656
  30M434  220V-2 616 1/2″ A
  45A434   220IV616 1/2″ A
 450D45C434   280616 5/8″
Din PCD404   280A616 5/8″
SAE PCD434  280V-LD280-1616 5/8″
HBWHSWZF    280-1A616 5/8″
5″ Flange   280PL280IV616 5/8″
360  524   285A616 5/8″
360A  524   285IV616 5/8″
400  524   286IV616 5/8″
450450H245-1524   300TS616 5/8″
 450A245A524 IRM   300-1TS616 5/8″
 450D45C524   300ATS616 5/8″
  50A2524   300-1ATS616 5/8″
  50A3524   300VTS616 5/8″
 600 524  301A-2301A616 5/8″
 630 524  301PL-2301C616 5/8″
 630H163524  300VTS300-1VTS616 5/8″
 630A163A524   110ATS616 5/8″
 630D63C524   110IVTS616 1/2″ A
  63IV524  IRMZF 
 630V 524 8″ Flange 
  88C524  311PL3118170 + Bush Kit
  90TS524   325A (V)8170 + Bush Kit
  90ATS524  350PL-23508170 + Bush Kit
  110TS524  350A-2350A8170 + Bush Kit
  901VTS524  350PL-1 8170 + Bush Kit
      350A-1 8170 + Bush Kit
THE ABOVE IS A GUIDE ONLY. Please check with Manufacturer.
Transmission Cross Reference
ManufactuerPoly Flex ManufactuerPoly Flex
ZF / HURTH (Cont)     
 IRMZF      
8″ Flange      
  350TS8170 + Bush Kit     
  350ATS8170 + Bush Kit     
  350V8170 + Bush Kit     
 350V-LD350IV8170 + Bush Kit     
  550A8170 + Bush Kit     
  6658170 + Bush Kit     
  665A8170 + Bush Kit     
  665V8170 + Bush Kit     
  ZF      
8 3/4″ Flange      
  30003306 + Bush Kit     
  30503306 + Bush Kit     
  30603306 + Bush Kit     
  3060A3306 + Bush Kit     
  3060V3306 + Bush Kit