Couplings - Poly Flex Australia

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 →
Model	Flange Bolt Circle Diameter PCD (F)	Flange Bolt Size	Flange Index Ring Spigot (E)	Flange Index Ring Type	Poly Flex Coupling OD (G)	Poly Flex Coupling ID	Poly Flex Coupling Thickness (A)	Flange OD (C)	Light Duty Rating (Nm)	Medium Duty Rating (Nm)	Heavy Duty Rating (Nm)	Super Heavy Duty Rating (Nm)
2.875	2 7/8" (73.025mm)	5/16" UNF	Pilot	Plain	4 5/16" (109.53mm)	1 3/8" (34.925mm)	1" (25.40mm)	2 Leg	180	210	290	N/A
402	65mm	3/8" UNF	Pilot	Plain	105mm	25mm	25.30mm	2 Leg	180	210	290	N/A
602	96.84mm	M12	Pilot	Plain	154mm	25mm	25.30mm	2 Leg	180	210	290	N/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 →
Model	Flange Bolt Circle Diameter PCD (F)	Flange Bolt Size	Flange Index Ring Spigot (E)	Flange Index Ring Type	Poly Flex Coupling OD (G)	Poly Flex Coupling ID	Poly 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)
303	97	3/8" UNF	Pilot	Plain	122mm	25mm	16mm	3 leg	180	210	290	N/A	0.43
304	4" (101.60mm)	3/8" UNF	Pilot	Plain	5 1/4" (133.35mm)	1" (25.40mm)	5/8" (16mm)	3 Leg	180	210	290	N/A	0.5
Rolco3	2 1/4" (57.15mm)	3/8" UNF SHCS	1" (25.40mm)	B	4" (101.60mm)	5/8" (16mm)	1" (25.40mm)	3" (76.20mm)	N/A	125	210	N/A	0.55
305-12	78.50mm	M8	Pilot	Plain	122mm	38mm	24.50mm	Toyota	N/A	N/A	250	N/A	0.5
305-14	78.50mm	M8	Pilot	Plain	122mm	38mm	24.50mm	Toyota	N/A	N/A	250	N/A	0.5
306D	84mm	M8	Pilot	Plain	123mm	38mm	26mm	Toyota	N/A	250	N/A	N/A	0.5
818	4 3/4" (120.65mm)	5/8" UNF	Pilot	Plain	6 5/8" (136.52mm)	2" (50.80mm)	1 1/16" (27mm)	5 3/4" (146.05mm)	N/A	1680	2400	N/A	2.9
5187 5/8"	5 1/16" (128.58mm)	5/8" UNF	Pilot	Plain	7 1/4" (184.15mm)	2 1/2" (63.50mm)	2" (50.80mm)		N/A	3200	4200	N/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 →
Model	Flange Bolt Circle Diameter PCD (F)	Flange Bolt Size	Flange Index Ring Spigot (E)	Flange Index Ring Type	Poly Flex Coupling OD (G)	Poly Flex Coupling ID	Poly 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)
404	3 3/8" (85.72mm)	3/8" UNF	2 1/2" (63.50mm)	A	5" (127mm)	1.5" (38.10mm)	1" (25.40mm)	4" (101.60mm)	230	496	610	N/A	0.6
414	70mm	M8	57mm	A	125mm	25.40mm	25mm	105mm	230	496	610	N/A	0.62
416	85mm	M10	65mm	B	152mm	50mm	25mm	105mm	230	496	610	N/A	0.7
424	78mm	M10	50mm	A	127mm	38.10mm	25mm	105mm	230	496	610	N/A	0.8
434	3 1/4" (82.55mm)	3/8" UNF	2 1/2" (63.50mm)	A	5" (127mm)	1.5" (38.10mm)	1" (25.40mm)	4" (101.60mm)	230	496	610	N/A	0.76
434P	3 1/4" (82.55mm)	3/8" UNF	2 5/8" (66.67mm)	A	5" (127mm)	1.5" (38.10mm)	1" (25.40mm)	4" (101.60mm)	230	496	610	N/A	0.78
454	90mm	M10	60mm	A	140mm	38.10mm	25mm	100mm	230	496	610	N/A	0.82
464	80mm	M10	60mm	B	127mm	38.10mm	25mm	100mm	230	496	610	N/A	0.8
474	75mm	7/16" UNF	45mm	A	120mm	38.10mm	25mm	100mm	230	496	610	N/A	1.2
490	90mm	7/16" UNF	60.03mm	A	117mm	38.10mm	28.58mm	100mm	230	496	610	N/A	0.85
494	74.5mm	M8	47mm	B	127mm	25.40mm	25mm	100mm	230	496	610	N/A	0.65
514	4 1/8" (104.77mm)	7/16" UNF	2 7/8" (73.02mm)	A	6 1/8" (155.57mm)	2" (50.80mm)	1 1/8" (28.57mm)	5" (127mm)	325	618	703	N/A	1.37
524	4 1/4" (107.95mm)	7/16" UNF	2 1/2" (63.50mm)	A	6 1/8" (155.57mm)	2" (50.80mm)	1 1/8" (28.57mm)	5" (127mm)	325	618	703	910	1.37
524 IRM	4 1/4" (107.95mm)	7/16" UNF SHCS	2 1/2" (63.50mm)	A	5 7/16" (138.11mm)	2" (50.80mm)	1 1/8" (28.57mm)	5" (127mm)	280	378	558	725	1.24
524P	108mm	M10	62.50mm	A	155.60mm	50mm	28.6mm	127mm	325	618	703	N/A	1.3
534	100mm	M10	65mm	A	152mm	50mm	25mm	127mm	325	618	703	N/A	0.95
534 IRM	100mm	M10 SHCS	65mm	A	133mm	50mm	25mm	127mm	280	378	558	725	0.83
1386	140mm	M14	Pilot	Plain	185mm	75mm	35mm	165mm	325	618	703	N/A
4128	128mm	5/8" UNC SHCS	100mm	A	170mm	58mm	38.10mm	157.50mm	325	618	703	N/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 →
Model	Flange Bolt Circle Diameter PCD (F)	Flange Bolt Size	Flange Index Ring Spigot (E)	Flange Index Ring Type	Poly Flex Coupling OD (G)	Poly Flex Coupling ID	Poly 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)
416	85mm	M10	65mm	B	152mm	50mm	25mm	105mm	325	618	703	N/A	0.70
436	3 1/4" (82.55mm)	7/16" UNF	2 1/2" (63.50mm)	A	5" (127mm)	1 1/2" (38.10mm)	1" (25.40mm)	4" (101.60mm)	325	618	703	N/A
546	3 7/8" (98.42mm)	7/16" UNF	2 1/2" (63.50mm)	B	6" (152.40mm)	2" (50.40mm)	1 1/4" (31.75mm)	4 3/4" (120.65mm)	N/A	975	1560	2180	1.6
546 IRM	3 7/8" (98.42mm)	7/16" UNF	2 1/2" (63.50mm)	B	6" (152.40mm)	2" (50.40mm)	1 1/4" (31.75mm)	4 3/4" (120.65mm)	N/A	800	1360	1950	1.55
556	105mm	M10	60mm	A	150mm	50mm	32mm	125mm	N/A	496	610	N/A	1.11
566	100mm	M10	75mm	A	152mm	50mm	25mm	125mm	N/A	496	610	N/A	1.12
616 1/2 A	4 3/4" (120.65mm)	1/2" UNC	3" (76.20mm)	A	6 3/8" (161.92mm)	2 3/8" (60.32mm)	1 1/2" (38.10mm)	5 3/4" (146.05mm)	N/A	1600	2550	N/A	2.95
616 1/2 B	4 3/4" (120.65mm)	1/2" UNC	3" (76.20mm)	B	6 3/8" (161.92mm)	2 3/8" (60.32mm)	1 1/2" (38.10mm)	5 3/4" (146.05mm)	N/A	1600	2550	N/A	2.95
616 5/8	4 3/4" (120.65mm)	5/8" UNC	3" (76.20mm)	B	6 3/8" (161.92mm)	2 3/8" (60.32mm)	1 1/2" (38.10mm)	5 3/4" (146.05mm)	N/A	1800	2750	3600	2.95
636	5 3/8" (136.52mm)	7/16" UNF	3 1/4" (82.55mm)	A	7 1/4" (184.15mm)	2" (50.40mm)	1" (25.40mm)	6 3/4" (171.45mm)	N/A	975	1560	N/A	2.4
646	125mm	M12	80mm	A	160mm	50mm	32mm	146mm	N/A	975	1560	N/A	2.44
656	4 3/4" (120.65mm)	5/8" UNC SHCS	3" (76.20mm)	B	6 1/16" (153.99mm)	2 3/8" (60.32mm)	1 1/2" (38.10mm)	5 3/4" (146.05mm)	N/A	1600	2550	N/A	2.95
1306	130mm	M8	85mm	A	162mm	60mm	25mm	155mm	N/A	N/A	915	N/A	1.5
2056 **	205mm	M16	130mm	A	260mm	75mm	38.10mm	230mm	N/A	3500	5000	N/A
2206	180mm	M20	140mm	A	240mm	75mm	38.10mm	220mm	N/A	3500	5000	N/A	6.35
2306	260mm	M20	170mm	A	337mm	100mm	38.10mm	320mm	N/A	N/A	8000	N/A	13
2306 (27)	260mm	M27	170mm	A	337mm	100mm	38.10mm	320mm	N/A	N/A	8000	N/A	13
2506	250mm	M20	160mm	A	336.55mm	100mm	38.10mm	320mm	N/A	N/A	8000	N/A	13
2506 (27)	250mm	M27	160mm	A	336.55mm	100mm	38.10mm	320mm	N/A	N/A	8000	N/A	13
2586	220mm	M20	140mm	B	300mm	100mm	42mm	258mm	N/A	N/A	8000	N/A	7.5
6146	146mm	M14 SHCS	110mm	A	195mm	75mm	38.10mm		N/A	N/A	3500	N/A
6170	170mm	M16 SHCS	130mm	A	212mm	75mm	38.10mm		N/A	N/A	4500	N/A	4.5
6196	196mm	M20	140mm	B	260mm	75mm	38.10mm	230mm	N/A	3500	5000	N/A
7206 5/8	6" (152.40mm)	5/8" UNC	3 3/4" (95.25mm)	B	8 3/8" (212.72mm)	2 7/8" (73.02mm)	1 1/2" (38.10mm)	7 1/4" (184.15mm)	N/A	3500	4800	N/A	4.4
7206 3/4 A	6" (152.40mm)	3/4" UNF	3 3/4" (95.25mm)	A	8 3/8" (212.72mm)	2 7/8" (73.02mm)	1 1/2" (38.10mm)	7 1/4" (184.15mm)	N/A	3500	4800	N/A	4.9
7206 3/4	6" (152.40mm)	3/4" UNF	3 3/4" (95.25mm)	B	8 3/8" (212.72mm)	2 7/8" (73.02mm)	1 1/2" (38.10mm)	7 1/4" (184.15mm)	N/A	3500	4800	N/A	4.9
7306 A	152mm	M16	100mm	A	195mm	75mm	38.10mm	184mm	N/A	3300	4500	N/A	3.8
7306	152mm	M16	100mm	B	195mm	75mm	38.10mm	184mm	N/A	3300	4500	N/A	3.8
7406	160mm	5/8" UNC	120mm	B	240mm	75mm	38.10mm	220mm	N/A	3800	5200	N/A	4.3
7406A	160mm	5/8" UNC	120mm	A	240mm	75mm	38.10mm	220mm	N/A	3800	5200	N/A	4.4
7506	160mm	M20	100mm	A	240mm	75mm	38.10mm	220mm	N/A	3800	5200	N/A	4.4
7606 IRM	6" (152.40mm)	M16 SHCS	3 3/4" (95.25mm)	B	7 1/4" (184.15mm)	3 7/8" (98.42mm)	1 1/4" (31.75mm)	6" (152.40mm)	N/A	N/A	3000	N/A	3
9114 IRM (3+3)^**	7.5" (190.50mm)	5/8" UNC	6" (152.40mm)	B	241mm	3 7/8" (98.42mm)	1 1/2" (38.10mm)	9" (228.60mm)	N/A	3000	4000	N/A	4.5
20150	240MM	M20	150mm	B	336.55mm	100mm	38.1	280mm	N/A	N/A	8000	N/A
24150	260mm	M24	150mm	A	400mm	100mm	50mm	300mm	N/A	N/A	18680	N/A
24160	240mm	M24	160mm	B	366.55mm	100mm	46mm	287mm	N/A	N/A	13200	N/A
24180	240mm	M24	180mm	B	336.55mm	100mm	46mm	285mm	N/A	N/A	13200	N/A
24190	270mm	M24	190mm	B	400mm	100mm	50mm	318mm	N/A	N/A	18680	N/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 →
Model	Flange Bolt Circle Diameter PCD (F)	Flange Bolt Size	Flange Index Ring Spigot (E)	Flange Index Ring Type	Poly Flex Coupling OD (G)	Poly Flex Coupling ID	Poly 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)
2308	230mm	M20	150mm	B	318mm	100mm	38.1	255mm	N/A	N/A	8600	N/A	11.00
2587	196mm	M16	140mm	B	240mm	75mm	31.75mm	225mm	N/A	N/A	5000	N/A
2808	280mm	7/8" UNF	200mm	A	360mm	75mm	50mm	345mm	N/A	N/A	12470	N/A	17.1
3308	330.20mm	1" UNF	225mm	B	425mm	130mm	60mm	415mm	N/A	N/A	25100	N/A	25.5
3408 (31)**	340mm	1"UNF	260mm	B	440mm	130mm	60mm	400mm	N/A	N/A	28000	N/A	27.5
3408	340mm	1" UNF	180mm	B	460mm	130mm	60mm	415mm	N/A	N/A	30000	N/A	29.5
7608 IRM	152.40mm	M16 SHCS	95.25mm	B	184.15mm	75mm	31.75mm	152.40mm	N/A	N/A	3810	N/A	3.6
8148**	148mm	M14 SHCS	100mm	A	212mm	60mm	38.10mm	200mm	N/A	N/A	4500	N/A	4.6
8192	192mm	5/8" UNC	130mm	B	240mm	80mm	38.10mm	220mm	N/A	N/A	5000	N/A	5.5
8196	196mm	5/8" UNC	140mm	B	280mm	75mm	38.10mm	225mm	N/A	N/A	6500	N/A	6
9114 IRM**	7 1/2" (190.50mm)	5/8" UNC	6" (152.40mm)	B	235mm	2 7/8" (73.02mm)	1 1/2" (38.10mm)	9" (228.60mm)	N/A	4000	5500	8800	5.5
9858 5/8	7 1/2" (190.50mm)	5/8" UNC	6" (152.40mm)	B	11" (279.40mm)	3 7/8" (98.42mm)	1 1/2" (38.10mm)	9" (228.60mm)	N/A	4500	6500	N/A	5.7
9858 3/4	7 1/2" (190.50mm)	3/4" UNF	6" (152.40mm)	B	11" (279.40mm)	3 7/8" (98.42mm)	1 1/2" (38.10mm)	9" (228.60mm)	N/A	5000	7000	N/A	6.6
9934	200mm	3/4" UNF	110mm	B	280mm	75mm	38.10mm	230mm	N/A	N/A	7000	N/A	6.6
10834	8 3/4" (222.25mm)	3/4" UNF	5" (127mm)	B	12 1/2" (317.50mm)	2 7/8" (73.02mm)	1 13/16" (46.03)	10 1/2" (266.70mm)	N/A	N/A	8600	N/A	9.6
11834A	9" (228.60mm)	3/4" UNF	6" (152.40mm)	B	11 1/4" (285.75mm)	3 7/8" (98.42mm)	1 13/16" (46.03)	11" (279.40mm)	N/A	N/A	8400	N/A	10.2
11834	9 1/2" (241.30mm)	3/4" UNF	6" (152.40mm)	B	13 1/4" (336.55mm)	3 7/8" (98.42mm)	1 13/16" (46.03)	11" (279.40mm)	N/A	N/A	9200	N/A	10.8
24220	300mm	M24	220mm	B	400mm	100mm	50mm	348mm	N/A	N/A	12690	N/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 →
Model	Flange Bolt Circle Diameter PCD (F)	Flange Bolt Size	Flange Index Ring Spigot (E)	Flange Index Ring Type	Poly Flex Coupling OD (G)	Poly Flex Coupling ID	Poly 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)
8170**	170mm	M14 SHCS	140mm	B	212mm	75mm	45mm	200mm	N/A	N/A	4000	8500	4.60
8212	218mm	5/8" UNC	140mm	A	270mm	75mm	38.10mm	250mm	N/A	N/A	5500	10000	6.80
9196**	196mm	M14 SHCS	140mm	B	240mm	75mm	38.10mm	220mm	N/A	N/A	4000	8500	5.80
19510	195mm	M8	180mm	A	240mm	75mm	27mm	220mm	N/A	1200	1800	N/A	3.80

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 →
Model	Flange Bolt Circle Diameter PCD (F)	Flange Bolt Size	Flange Index Ring Spigot (E)	Flange Index Ring Type	Poly Flex Coupling OD (G)	Poly Flex Coupling ID	Poly 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)
2250**	245mm	M14 SHCS	175mm	B	305mm	80mm	38.10mm	270mm	N/A	N/A	5500	N/A	9.10
3306**	190mm	M14 SHCS	145mm	B	240mm	80mm	38.10mm	225mm	N/A	N/A	4000	8000	5.90
26012**	260mm	3/4" UNF SHCS	150mm	A	340mm	80mm	38.10mm	300mm	N/A	N/A	6500	9500
29212**	292.10mm	3/4" UNF SHCS	177.72mm	B	400mm	80mm	38.10mm	340mm	N/A	N/A	5500	9000

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 →
Model	Flange Bolt Circle Diameter PCD (F)	Flange Bolt Size	Flange Index Ring Spigot (E)	Flange Index Ring Type	Poly Flex Coupling OD (G)	Poly Flex Coupling ID	Poly 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)
484	3 1/8" (79.37mm)	(4) 3/8" UNF (Rect)	2 3/8" (60.32mm)	A	5" (127mm)	1 1/2" (38.10mm)	1" (25.4mm)	3 13/16" (96.83mm)	171	309	486	N/A	0.80
545	3 3/4" (95.25mm)	(4) 7/16" UNF (Rect)	2 3/4" (69.85mm)	A	5 9/32" (134.14mm)	2" (50.80mm)	1 1/4" (31.75mm)	4 9/16" (115.88mm)	260	335	563	N/A	1.2
547	3 3/4" (95.25mm)	(4) 7/16" UNF (Rect)	2 3/4" (69.85mm)	A	6" (152.40mm)	2" (50.80mm)	1 1/4" (31.75mm)	4 9/16" (115.88mm)	300	375	603	910	1.3
1540	5 1/8" (130.09mm)	(4) 1/2" UNF (Rect)	3 35/64" (89.99mm)	A	7" (177.80mm)	2" (50.80mm)	1 7/16" (36.50mm)	5 3/4" (146.05mm)	360	670	1200	N/A	2.1
1550	4 3/4" (120.65mm)	(4) 1/2" UNF (Rect)	3 3/4" (95.25mm)	A	7" (177.80mm)	2" (50.80mm)	1 7/16" (36.50mm)	5 3/4" (146.05mm)	360	670	1200	1700	2.1
1600	6 1/8" (155.57mm)	(8) 3/8" UNF (45deg)	6 5/8" (168.27)	A	8 1/2" (215.90mm)	2 23/64" (59.99mm)	1" (25.40mm)	6 7/8" (174.62mm)	N/A	1536	2152	N/A	1.8
1700	7 1/4" (184.15mm)	(8) 3/8" UNF (45deg)	7 3/4" (196.85mm)	A	9 1/2" (241.30mm)	3" (76.20mm)	1" (25.40mm)	9" (228.60mm)	N/A	1690	2370	N/A	2.2

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
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
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
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
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
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
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
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
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
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
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