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
Engine

Fuel Filters & Fittings

Racor Spin-on & Turbine Series, High-flow Series, Snapp filters, CCV filters...

Water-in-fuel Detection

Water-in-fuel detection for diesel applications. Suitable for Racor water separator…

Fuel Level Senders and Gauges

Tubular, swing-arm, float and horizontal senders. Fuel & fuel/water gauges.

Tachometers & Hour Meters

San Giorgio Sein instruments, VDO instruments...

Engine Monitoring

Gauges and senders for engine monitoring.

Exhaust Systems

Mufflers, waterlocks, goose necks and air vents for wet exhaust systems.

Hoses and Exhaust Parts

Wet exhaust hose, exhaust tubing, elbows, transom outlets, fuel delivery hose, hose…

Flexible Engine Mountings

R&D marine comprehensive range of fail safe flexible engine mountings.

Damper Drive Plates

R&D marine damper drive plates.

Split Half Couplings

Split half couplings accomodate the variations that occur with normal shaft tolerances.

Rope Cutters

R&D marine rope cutters will prevent a loose line from wrapping around your propeller.

Propeller Shaft Bearings

Water lubricated propeller shaft bearings, to suit metric and imperial shafts.

Propeller Shafts & Accessories

Machined propeller shafts and stern glands.

Fans & Blowers

In-line blowers, centrifugal blowers, axial blowers and cabinet fans.

Insulation

Accoustic foam panels.

Oils, Lubricants & Additives

Engine oils, transmission fluids, engine flush additives, fuel additives, coolants…

Spark Plugs

NGK spark plugs.