Flexible Shaft Couplings

R&D marine flexible shaft couplings

Contoured flexible disc molded in tough yet resilient polyurethane, to absorb vibrations, noise and propeller thrust.
Provides electric isolation of the shaft line.
Supplied with bolts and nuts ready for installing.

For engines up to 230 HP / 100 rpm @ propeller shaft.
Wide range of adaptor plates and spacers available upon request.
Formula to calculate power of coupling required @ 100 rpm: 100 x P x R / n

Example:
Motor power (P): 120 HP – Rotation speed (n): 2000 rpm
Reduction ratio (R): 2
Power required @ 100 rpm = 12 HP

		Gearbox Flange Dimensions					Flexible Coupling Details
Ref.	Compatibility	Diameter mm (in.)	Bolt Qty	Hole dia. (mm)	Bolt Pitch Circle (mm)	Register (mm)	Diameter (mm)	Length (mm)	Bolt dia. (mm)	Capacity @ 100 rpm
DR014	BW, PRM, ZF-Hurth, Technodrive	101.6 (4.00)	4	10.0	82.55	63.5	114.3	32.5	M10	3 HP
DR007	Volvo	101.6 (4.00)	4	10.0	80.0	60.0	114.3	43.7	M10	3 HP
DR002	Yanmar	101.6 (4.00)	4	10.0	78.00	50.0	114.3	32.5	M10	3 HP
DR001	BW, PRM, ZF-Hurth, Technodrive	101.6 (4.00)	4	10.0	82.55	63.5	114.3	32.5	M10	5 HP
DR020	Volvo	101.6 (4.00)	4	10.0	80.0	60.0	114.3	32.5	M10	5 HP
DR043	Yanmar	101.6 (4.00)	4	10.0	78.0	50.0	114.3	32.5	M10	5 HP
DR005	Paragon	101.6 (4.00)	4	9.7	82.55	66.7	114.3	34.5	3/8 UNF	7 HP
DR004	BW, PRM, ZF-Hurth	101.6 (4.00)	4	10.0	82.55	63.5	114.3	35.6	M10	8 HP
DR044	BW, PRM, ZF-Hurth, Volvo	127.0 (5.00)	4	11.2	107.9	63.5	143.0	45	7/16 UNF	8 HP
DR012	Yanmar	127.0 (5.00)	4	10.0	100.0	65.0	143.0	45.0	M10	10 HP
DR009	BW, PRM, ZF-Hurth	127.0 (5.00)	4	11.2	107.9	63.5	143.0	45.0	7/16 UNF	13 HP
DR010 *	Volvo	127.0 (5.00)	4	11.2	107.9	63.5	143.0	45.0	7/16 UNF	13 HP
DR029	BW, ZF-Hurth, Volvo	127.0 (5.00)	4	11.2	107.9	63.5	143.0	52.4	7/16 UNF	20 HP
DR003 **	BW, PRM, ZF-Hurth, Twin Disc	146.0 (5.75)	6	12.7	120.6	76.2	152.4	47.5	1/2 UNF	20 HP
DR006	Twin Disc, ZF-Hurth	146.0 (5.75)	6	16.0	120.6	76.2	152.4	47.5	1/2 UNF	20 HP
DR025 **	BW, PRM, ZF-Hurth, Twin Disc	146.0 (5.75)	6	12.7	120.6	76.2	152.4	49.8	1/2 UNF	28 HP
DR026	Twin Disc	146.0 (5.75)	6	16.0	120.6	76.2	152.4	49.8	1/2 UNF	28 HP
DR032 **	BW, PRM, ZF-Hurth, Twin Disc	146.0 (5.75)	6	12.7	120.6	76.2	152.4	55.4	1/2 UNF	37 HP
DR033	Twin Disc, ZF-Hurth	146.0 (5.75)	6	16.0	120.6	76.2	152.4	55.4	1/2 UNF	37 HP
DR017	Twin Disc	184.2 (7.25)	6	19.0	152.4	95.2	190.5	60.7	5/8 UNF	40 HP
DR040	PRM	184.2 (7.25)	6	16.0	152.4	95.2	190.5	63.3	5/8 UNF	55 HP
DR022	Twin Disc	228.6 (9.0)	8	12.7	190.5	152.4	222.2	44.5	1/2 UNF	65 HP

* DR010 is supplied with 70mm screws, DR009 with 57mm screws.
** TP384: 54mm spacer for DR003, DR025 & DR032 mounting on IRM220A & TP1248 for Twin Disc 502.

Flexible Shaft Couplings