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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

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 kits or adaptors are required 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 kits or adaptors are required 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 kits or adaptors are required 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 kits or adaptors are required 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