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Marine propeller shaft flexible coupling 4 Bolt
Marine propeller shaft flexible coupling 8 Bolt
Marine propeller shaft flexible coupling 6 Bolt
Marine Flexible Propeller Shaft Couplings- R & D
Flexible Propeller Shaft Couplings absorb shock and protect your driveline and absorb vibrations and compensates for some misalignment. These Flexible couplings can withstand saltwater and harsh chemicals and are easy to install, your boat can stay in the water and can be used in industrial applications.Headland Engineering is authorised distributor of these marine products direct in Australia.R & D Marine has developed a wide range of competitively priced Flexible shaft Couplings to fit all major installations on boats and marine applications and is mounted between gear box flange and propeller shaft flange and acts as a damper. The R & D marine Flexible prop shaft Couplings reduce engine noise, vibration transmission and are designed to accept propeller thrust, a separate thrust bearing and bulkhead are not required.
  • The boat shaft couplings are made from a polyester elastomer which is not affected by salt water, diesel and lubrication fluids.
  • If electrical continuity is required, an earthing connector can be fitted in the centre of most boat and marine prop shaft flexible Couplings.
  • Installation is quick and easy for the propeller shaft coupling as the R & D Coupling requires no machining and comes supplied with bolts to connect between the two existing shaft flanges.
  • The boat flexible coupling can be easily adjusted and checked for alignment on installation and during service checks is quick and easy using the red cone headed bolt.
  • The marine propeller shaft couplings are available ex-stock and worldwide through distribution network.
  • Available for Yanmar, Twin Disc, ZF Hurth, Bukh, Beta, Nanni Diesel, Technodrive, Volvo Penta, Newage PRM, Vetus Borg Warner application
  • Available in comprehensive range of sizes for marine and boat engines 5 to 1500 HP.

R & D Marine flexible disc transmission couplings provide a damper between the gearbox and propeller shaft to isolate torsional vibration from the engine and gearbox. The high precision flexible couplings provide the softest element in the shaft assembly to improve performance and provide a sacrificial link that is designed to fail before gearbox damage occurs. These boat propeller shaft couplings 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 BUREAU VERITAS & LLOYDS REGISTER of shipping approval for select couplings as per brochure and are designed for marine use, these couplings are used in many industrial driveline applications too.
Flexible Coupling Information: The R&D 910 Series couplings are made of a flexible, curved disc that is moulded in a new, durable polyester elastomer. When the boat structure flexes or the engine moves on its rubber vibration isolation mountings, the contoured disc can freely flex to correct any temporary misalignment of the engine and shaft. It also provides clearance for bolt heads. The disc between the two half couplings receives forward thrust in compression, and the disc between the two failsafe straps receives reverse thrust in compression. The steel straps ensure that the drive is maintained in both forward and backward and make the coupling fail safe in the unlikely case of a disc failure. Although couplings are normally non-conductive, if necessary, we may provide a rubber element impregnated with silver to fit in the middle of the coupling between the two failsafe straps to provide continuity. Information about Flexible Coupling is as follows.
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2 BOLT COUPLINGS
Used on two bolt hole output flanges
Gearbox Flange Dimensions
Flexible Coupling Details
Flexible Coupling
Manufacturer
Diameter mm inch
No. Bolts
No. Dia. of Holes mm inch
Bolt Pitch Circle mm inch
Register mm inch
Diameter mm inch
Length mm inch
Bolt Diameter
Capacity/ 100 rpm kw HP
Ref
910-021
Enfield, Sonic
101.6 4.00
2
11.2 0.44
76.0 3.00
----
108.00 4.25
41.7 1.64
7/16 UNF
1.87 2.5
910-060
TMP
112.8 4.44
2
11.2 0.44
81.0 3.19
----
112.8 4.44
38.1 1.50
7/16 UNF
2.42 3.25
4 BOLT COUPLINGS
Used on four bolt hole output flanges
Gearbox Flange Dimensions
Flexible Coupling Details
Flexible Coupling
Manufacturer
Diameter mminch

No. Bolts
No. Dia. of Holesmminch
Bolt Pitch Circlemminch
Registermminch
Diametermminch
Lengthmminch
Bolt Diameter
Capacity/100 rpmkw HP

Ref
910-001
B/W, PRM, ZF-Hurth, Technodrive
101.6 4.00
4
10.00 0.39
82.55 3.25
63.5 2.50
114.3 4.5
32.5 1.28
M10
3.73 5
910-002
Yanmar
101.6 4.00
4
10.00 0.39
78.00 3.07
50.00 1.97
114.3 4.5
32.5 1.28
M10
2.24 3
910-004
B/W,PRM, ZF-Hurth
101.6 4.00
4
10.00 0.39
82.55 3.25
63.5 2.50
114.34.5
35.61.40
M10
5.97 8
910-005
Paragon
101.6 4.00
4
9.7 0.38
82.55 3.25
66.7 2.63
114.3 4.5
34.5 1.35
3/8 UNF
5.22 7

910-007
Volvo
101.6 4.00
4
10.00 0.39
80.00 3.15
60.00 2.36
114.3 4.5
43.7 1.72
M10
2.24 4



910-009
B/W PRM, ZF-Hurth, Volvo
127.0 5.00
4
11.2 0.44
107.9 4.25
63.5 2.50

143.0 5.63

45.0 1.77
7/16 UNF
9.69 13


X O
910-012
Yanmar
127.0 5.00
4
10.00 0.39
100.00 3.93
65.00 2.56
135.00 5.31
45.00 1.77
M10
7.46 10



910-013
Bukh
90.00 5.00
4
8.1 FF0D0D
74.5 2.93
47.0 1.85
114.3 4.5
32.5 1.28
M8
2.24 3



910-014
B/W, PRM, ZF-Hurth, Volvo
101.6 4.00
4
10.00 0.39
82.55 3.25
63.5 2.50
114.3 4.5
32.5 1.28
M10
2.24 3



910-019
Volvo
101.6 4.00
4
10.00 0.39
80.00 3.15
60.0 2.36
114.3 4.5
32.5 1.28
M10
2.24 3


910-020
Volvo
101.6 4.00
4
10.0 0.39
80.0 3.15
60.0 2.36
114.3 4.5
32.5 1.28
M10
3.73 5


910-028
Bukh
90.0 3.54
4
8.1 0.32
74.5 2.93
47.0 1.85
114.3 4.5
32.5 1.28
M8
3.73 5


910-034
Open Centre V Drive 52mm Bore
127.0 5.00
4
11.2 0.44

107.9 4.25

63.5 2.50

162.0 6.38

45.0 1.77

7/16 UNF
8.95 12



910-029
B/W, ZF-Hurth, Volvo
127.0 5.0
4
11.2 0.44
107.9 4.25
63.5 2.50
143.0 5.63
52.4 2.06
7/16 UNF
14.92 20


910-036
Twin Disc
127.0 5.0
4
10.0 0.39
104.8 4.13
63.5 2.50
143.0 5.63
45.0 1.77
M10
7.46 10


910-037
Yanmar
130.00 5.12
4
12.3 0.48
107.9 4.25
63.5 2.50
143.0 5.63
51.1 2.01
7/16 UNF
9.69 13


910-043
Yanmar
101.6 4.00
4
10.0 0.39
78.0 3.07
50.0 1.97
114.3 4.5
32.5 1.28
M10
3.73 5


910-044
B/W, PRM, ZF-Hurth, Volvo
127.0 5.00
4
11.2 0.44
107.9 4.25
63.5 2.50
143.0 5.6
45.0 1.77
7/16 UNF
5.97 8



910-055
Open Centre V Drive 52mm Bore
127.0 5.0
4
11.2 0.44

107.9 4.25

63.5 2.50

162.0 6.38

45.0 1.77

7/16 UNF
5.2 7



910-057
B/W, Hurth, Volvo
127.0 5.00

4
11.2 0.44
107.9 4.25
63.5 2.50
143.09 5.63
52.4 2.06
7/16 UNF
18.64 25



910-059
Volvo
101.6 4.00

4
10.0 0.39
80.0 3.15
60.0 2.36
114.3 4.5
35.6 1.40
M10
5.96 8


910-061
Open Centre V Drive 52 mm Bore
127.0 5.00
4
11.2 0.44
107.9 4.25
63.5 2.50
162.0 6.38
52.6 2.07
7/16UNF
14.16 19


910-065
Dong-I DMT 18 A. DMT 25AL
112.0 4.41
4
12.0 0.47
90.0 3.54
62.0 2.44
114.0 4.49
45.5 1.79
M12
5.97 8


910-067
ZF 631V
130.0 5.12
4
11.5 0.45
107.9 4.25
63.5 2.50
162.0 6.38
52.25 2.06
7/16 UNF
17.91 24


910-068
Yanmar
101.6 4.00
4
10.0 0.39
78.0 3.07
50.0 1.97
114.3 4.5
35.9 1.41
M10
5.97 8


6 BOLT COUPLINGS
Used on Six bolt hole output flanges
Gearbox Flange Dimensions
Flexible Coupling Details
Flexible Coupling
Manufacturer
Dia.mm Inch
No. Bolts
No. Dia. of Holesmminch
Bolt Pitch Circlemminch
Registermminch
Dia.mmInch
Lengthmminch
Bolt Diameter
Capacity/100 rpmkw HP
Ref
910-003
B/W, PRM, ZF-Hurth, Twin Disc
146.05.75
6
12.70.50
120.64.75
76.23.00
152.4 6.0
47.51.87
1/2 UNF
14.92 20
X O
910-006
Twin Disc, ZF-Hurth
146..0 5.75
6
16.0 0.63
120.64.75
76.2 3.00
152.4 6.0
47.5 1.87
1/2 UNF
14.92 20
O X O
910-015
Self-Change 350 HD
222.2 8.75
6
11.2 0.44
190.5 7.50
152.4 6.00
222.2 8.75
44.5 1.75
7/16 UNF
32.1 43
O
910-016
Self-change 700HD
260.4 10.25
6
16.0 0.63
228.6 9.00
152.4 6.00
276.4 10.88
58.0 2.28
5/8 UNF
48.47 65
X O
910-017
Twin Disc
184.2 7.25
6
19.0 0.75
152.4 6.00
95.25 3.75
190.5 7.5
60.7 2.39
5/8 UNF
29.84 40
O X O
910-018
PRM
184.2 7.25
6
16.0 0.63
152.4 6.00
95.25 3.75
190.5 7.5
60.7 2.39
5/8 UNF
29.84 40
X O
910-025
B/W, PRM, ZF-Hurth, Twin Disc
146.0 5.75
6
12.7 0.5
120.6 4.75
76.2 3.00
152.4 6.0
49.8 1.96
1/2 UNF
20.88 28
X O
910-026
Twin Disc
146.0 5.75
6
16.0 0.63
120.6 4.75
76.2 3.00
152.4 6.00
49.8 1.96
1/2 UNF
20.88 28
O X O
910-032
B/W, PRM, ZF-Hurth, Twin Disc
146.0 5.75
6
12.7 0.5
120.6 4.75
76.2 3.00
152.4 6.0
55.4 2.18
1/2 UNF
27.6 37
910-033
Twin Disc, ZF-Hurth
146.0 5.75
6
16.0 0.63
120.6 4.75
76.2 3.00
152.4 6.0
55.4 2.18
1/2 UNF
27.6 37
O
910-017
Twin Disc
184.2 7.25
6
19.0 0.75
152.4 6.00
95.25 3.75
190.5 7.5
60.7 2.39
5/8 UNF
29.84 40
910-038
Taipeoungyang TK 250
178.0 7.00
6
14.3 0.56
152.0 5.984
100.0 3.94
190.5 7.50
63.3 2.49
M14
41.0 55
o O
910-039
Twin Disc
184.2 7.25
6
19.0 0.75
152.4 6.0
95.25 3.75
190.5 7.50
63.3 2.49
5/8 UNF
41.0 55
O
910-040
PRM
184.2 7.25
6
16.0 0.63
152.4 6.00
95.25 3.75
190.5 7.50
63.3 2.49
5/8 UNF
41.0 55
O
910-042
Dong-I DMT 170HL
287.2 11.3
6
25.1 0.98
240.0 9.45
160.0 6.30
292.1 11.5
58.4 2.30
5/8 UNF
67.0 90
O
910-047
Dong-I DMT 260 H
292.1 11.5
6
21.0 0.826
240.0 9.45
150.0 5.90
292.1 11.5
58.4 2.30
5/8 UNF
67.0 90
910-052
Lister
120.7 4.75
6
11.2 0.44
98.5 3.88
63.5 2.50
150.9 5.94
69.9 2.75
7/16 UNF
7.46 10
O
910-053
Dong-I, DMT 150 H
218.0 8.58
6
20.0 0.79
180.0 7.09
140.0 5.51
222.2 8.75
45.0 1.77
1/2 UNF
35.8 48
910-054
Open Centre V Drive 58mm Bore
146.0 5.75
6
12.7 0.50

120.6 4.75

76.2 3.00

172.0 6.77

47.5 1.87

1/2 UNF
17.9 24

910-058
Dong-I DMT 70T, 90T, 100T
178.0 7.0
6
16.0 0.63
152.0 5.984
100.0 3.94
190.5 7.50
63.3 2.49
5/8 UNF
41.0 55

910-062
Dong-I DMT 140H
198.0 7.80
6
16.0 0.63
170.0 6.69
130.0 5.12
210.0 8.27
48.2 1.90
M16
47.0 63
910-063
Open Centre V Drive 58mm Bore
146.0 5.75
6
12.7 0.50
120.6 4.75

76.2 3.00

172.0 6.77

55.5 2.185

1/2 UNF
23.8 32
910-064
Open Centre V Drive 67mm Bore
184.2 7.25
6
16.0 0.63

152.4 6.00

95.25 3.75

230.0 9.06
63.8 2.51

5/8 UNF
37.3 50

X O
8 BOLT COUPLINGS
Used on eight bolt hole output flanges
Gearbox Flange Diameter
Flexible Coupling Details
Flexible Coupling
Manufacturer
Dia.mmInch
No. Bolts
No. Dia. of Holesmminch
Bolt Pitch Circlemminch
Registermminch
Dia.mmInch
Lengthmminch
Bolt Diameter
Capacity/100 rpmkw HP
Ref
910-022
Twin Disc
228.6 9.00
8
22.6 0.89
190.5 7.50
152.4 6.00
222.2 8.75
44.5 1.75
1/2 UNF
48.47 65
O X O
910-024
Twin Disc
266.7 10.5
8
25.4 1.00
222.2 8.75
127.0 5.00
276.4 10.88
56.7 2.23
5/8 UNF
63.38 85
O X O
910-027
ZF W 320 320A
225 8.86
8
17.0 0.67
196 7.72
140 5.51
228.6 9.0
44.5 1.75
1/2 UNF
48.47 65
O
910-030
292.1 11.5
8
25.4 1.00
247.6 9.75
152.4 6.00
292.1 11.5
58.4 2.30
5/8 UNF
89.48 120
O X O
910-035
340.0 13.38
8
25.4 1.00
295.3 11.63
152.4 6.00
348.0 13.7
108.0 4.25
5/8 UNF
119.3 160
O
910-041
292.1 11.5
8
25.4 1.00
247.6 9.75
152.4 6.00
292.1 11.5
58.4 2.30
5/8 UNF
104.4 140
O
910-045
340.0 13.38
8
25.4 1.00
295.3 11.63
152.4 6.00
348.0 13.7
108.0 4.25
3/4 UNF
171.5 230
o O
910-046
Allison M25
228.6 9.00
8
19.0 0.75
190.0 7.50
152.4 6.00
222.2 8.75
44.5 1.75
1/2 UNF
48.47 65
O
910-050
Twin Disc 510A/5 114A
230.0 9.00
8
22.6 0.89
190.5 7.50
152.4 6.00
230.0 9.00
101.6 4.0
1/2 UNF
63.38 85
O
910-051
Twin Disc MG 521
279.4 11.00
8
19.0 0.75
241.3 9.50
152.4 6.00
260.4 11.25
58.4 2.30
5/8 UNF
89.48 120
O
910-066
Twin Disc MG5111
228.6 9.00
8
22.6 0.89
190.0 7.50
152.4 6.00
228.6 9.00
101.1 3.98
1/2 UNF
63.43 85
10 BOLT COUPLINGS
Used on ten bolt hole output flanges
Gearbox Flange Diameter
Flexible Coupling Details
Flexible Coupling
Manufacturer
Dia.mmInch
No. Bolts
No. Dia. of Holesmminch
Bolt Pitch Circlemminch
Registermminch
Dia.mmInch
Lengthmminch
Bolt Diameter
Capacity/100 rpmkw HP
Ref
910-049
ZF 325-1A Volvo Flange
205.0 8.07
10
18.0 0.71
170.0 6.69
140.0 5.51
223.0 8.78
124.0 4.88
M18
56.0 5.0
6 (8) BOLT COUPLINGS
Gearbox Flange Diameter
Flexible Coupling Details
Flexible Coupling
Manufacturer
Diameter mm Inch
No Bolts
No. Dia. of Holesmminch
Bolt Pitch Circlemminch
Registermminch
Dia. mm Inch
Lengthmminch
Bolt Diameter
Capacity/100 rpmkw HP
Ref
910-048
Twin Disc MG 5111 SC
228.69.00
6 (8)
22.6 0.89
190.5 7.50
152.4 6.00
222.2 8.75
62.7 2.47
1/2 UNF
48.47 65
O X O
INSTALLATION PROCEDURE FOR R & D MARINE COUPLINGS
1. Roughly align engine and stern gear without flexible coupling i.e. only two rigid half couplings pushed together.2. Bolt “R & D Marine” coupling between the two rigid couplings. Tightening details as below.
3. Check alignment of engine by placing feeler gauges between the RED CONE HEADED BOLT and the rigid half coupling. Repeat for the SAME bolt at 90° intervals by rotating the shaft.4. If the gap is the same in all four positions, the engine is accurately aligned. Recommended minimum to maximum gap difference: 0.25 mm / .010 inch. 5. Run installation to bring engine compartment to working temperature. Re-check torque settings.
Recommended tightening torque:
  • M8 - 27 Nm 20 lbsft
  • 3/8 UNF - 40 Nm 30 lbsft
  • M10 - 54 Nm 40 lbsft
  • 7/16 UNF - 81 Nm 60 lbsft
  • M12 - 108 Nm 80 lbsft
  • 1/2 UNF - 100 Nm 75 lbsft
  • 5/8 UNF - 210 Nm 155 lbsft
  • M18 - 338 Nm 250 lbsft
  • 3/4 UNF - 366 Nm 270 lbsft
COUPLING SELECTION GUIDE
Data Required for Selection of Flexible Coupling:
  • Horsepower (H.P.) of Engine
  • RPM/ Speed of Engine
  • Reduction Ratio of the Gear Box
  • No of bolt holes on the gear box flange
  • Outer diameter of Gear Box flange
  • Size of holes on Gear box flange
  • PCD or the distance between opposite holes on Gear Box flange
  • Gear Box model no. can help in confirming fitment of the flexible Coupling.
ALLISON M25 9" Flange 910-046 BORG WARNER4" Flange 910-001, 910-004, 910-01470C 71C500 10001500 5" Flange 910-009(BW) 910-029, 910-044(BW), 910-05771C 72C50006" Flange 910-003, 910-025, 910-03273C 7000 BUKH 4" Flange 910-013, 910-028 DONG IDMT 70T 178 mm Flange 910-058DMT 90TDMT 100TDMT 134H 198 mm Flange 910-062DMT 140HDMT 144H 218 mm Flange 910-053DMT 150HDMT 170HL 287 mm Flange 910-042DMT 260H 292 mm Flange 910-047 ENFIELD and SONIC DRIVES 2 Bolt 910-021 LISTER 4 1⁄2" Flange 910-052 NEWAGE PRM S= Shallow Case, D= Deep Case4" Flange 910-001, 910-004, 910-014Delta 80 120150 5" Flange 910-009(PR) 910-044(PR) 101 910-029 140 160 260 6" Flange 910-003, 910-025, 910-032 175 265 301 302 310 401 402 500 750 601 3:1 1000 3:1 7 1⁄4" Flange 910-018, 910-040601 4:11000 4:1 1200S 1500S1750S 10 1⁄2" Flange 910-0241200D 1500D1750D PARAGON4" Flange 910-005 SELF CHANGE GEARS 8 3⁄4" Flange 910-015 350HD 10 3⁄4" Flange 910-016 700 TAIPEOUNGYANG178 mm Flange 910-038TK250
TECHNODRIVE4” Flange 910-001, 910-004, 910-014TMC30 TMC40TMC50TMC60TM260 5" Flange 910-009(PR) 910-029 TM93 - needs spacer 202-560 910-044(PR)TM93ATM170TM170ATM345TM345ATM485ATM545ATM880A 6" Flange 910-006,910-026,910-033TM130BTM200B up to 1.28: 1 TM265TM265A 7 1⁄4" Flange 910-018TMC200B up to 4.48: 1TM1200A TMP2 Bolt 910-0605" Flange 910-009(PR) 910-044(PR)12000 TWIN DISC SC= Shallow Case, DC= Deep Case 4" Flange 910-001, 910-004, 910-014 MG 340 MG 360 MG5010SC MG5011SC MG5010V 4 3⁄4" Flange Adaptor 202-148 with MG502-I 910-003, 910-025, 910-032 MG502-V 5" Flange 4 1⁄8PCD 910-036 MG5010A MG5011A 5" Flange 4 1⁄4PCD 910-009(PR) 910-044(PR) MG5005A 910-029, 910-057 MG5012SC MG5015A MG5020SC MG5055A 6" Flange 910-006, 910-026, 910-033 MG5010DC MG5050 MG5050-V MG5050-A MG5061SC MG5061-A MG5061V MG5062V MG506-1 MG506A-1 MG507-1 MG507A-1 MG5075IV MG5075-A MG5075SC 7 1⁄4" Flange 910-017, 910-039 MG506DC MG5065A MG507-1 MG507-1SC MG507-2SC MG507A-2 MG5075A - needs adaptor 202-356 MG5075SC MG5075IV MG5081SC MG5081A - needs adaptor 202-356 MG5082A MG5082SC MG5085SC - needs adaptor 202-356 MG5085A - needs adaptor 202-356 MG5090A MG509SC MG509U MG5091SC MG5095A MGX5095A
TWIN DISC cont`d 9" Scalloped Flange 910-048 MG5111SC MG5114SC 9" Flange 910-022, 910-050MG510SC MG510AMG5111AMG5114AMG5111V,MG5114VMG514CUMG514UMG5135AMG&MGX5126A - Special long bolts for flange10 1⁄2" Flange 910-024 MG509DC MG510DC MG5111DC MG5114DC MG5113 MG514 VOLVO4" Flange 910-007 MS RB 4" Flange 910-019, 910-020, 910-059 MS 2 MS 10MS 15MS25 5" Flange 910-009(VO), 910-029MS 3 910-044(VO), 910-057 MS4MS5HS25AHS45AHS63A6" Flange 910-006, 910-026 HS80A 910-033HS85AE YANMAR (KANZAKI)4" Flange 78mm PCD 910-002 KBW10 910-043 KM2 910-068 KM3 KM35 5" Flange 100mm PCD 910-012 KBW20 KBW21 KM4 KM4A KMH4A 5 1⁄2"Flange 4 1⁄4PCD 910-009, 910-029, 910-037 KM40 910-057 KM5 KMH40A KMH41A KMH50 KMH50A KMH50V 910-034, 910-055, 910-061 KMH51A 5 1⁄2"Flange 4 1⁄4PCD 910-034, 910-055, 910-061 KMVH50 910-067 6" Flange 910-006, 910-026, 910-033 KMH6 KMH60 KMH61A KMH61V 910-063 ZF-HURTH4" Flange 910-001, 910-004, 910-014 ZF 35 HBW 35 40 HBW 4M 50 HBW 5M 100 HBW 10M 125H HSW 12 125 HBW 12M 150 HBW 15M 150A HBW 15MA 250 HBW 25M 250H HSW 25 250A HSW 25A 25MA 30M 45A 1.25:1 450D HSW 45C
ZF HURTH cont`d 4 3⁄4" Adaptor 202-384 with 910-003, 910-025, 910-032 ZF 220A-1 IRM 220A 225Az5" Flange 910-009(PR), 910-029 910-044(PR), 910-057HBW HSW ZF 360 450H2 450A2 45A 450D 45C 450D 63 630A1 63A 630D 63C 88C 90TS 90ATS 110TS6" Flange 13.2 mm bolt holes 910-003, 910-025, 910-032 ZF45-1 6" Flange 16.3mm bolt holes 910-006, 910-026, 910-033 HSW IRM ZF800A2 80A800A3 80-1A 85A 220 needs adaptor 202-329 280A 280-1 280V-LD 280-1A 280PL 280IV 280 285A 285IV 286 286A 286IV 300TS 300-1TS 300ATS 300-1ATS 301PL-2 301C 301A-2 301A 300VTS 300IVTS 110ATS 110IVTS7 1⁄4" Flange 910-017, 910-039IRM3118" Flange 910-049IRM ZF 311PL 311 325-1A Volvo 335A 350PL-2 350 350A-2 350A 350PL-1 350A-1 350 TS 350 ATS350V 350V350V-LD 350 IV 360A 500A 500-1A8 3⁄4" Flange 910-027IRM ZF320-2 W320 320A ZF-HURTH V DRIVE4" Flange Adaptor 202-351 withHSW ZF 910-034, 910-055, 910-061150V 15M IV5" Flange 910-034, 910-055, 910-061 HSW ZF 910-067 90 IVTS630V 63 IV6" Flange 910- 054, 910-063HSW ZF 110 IVTS220V-2 220 IV800V 80 IV800V2 80-1IV7 1⁄4" Flange Adaptor 202-552 with ZF 910-064 302 IV8" Flange 910-049 ZF 325 IV 350-IV 370V 500-1 IV
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Calculation for Selection of Flexible Coupling
I. For 150 HP at the RPM of 2500II. Bord Warner Velvel Drive 72C with Reduction Ratio 2:1III. 5” Flange, 2.500 Diameter RegisterIV. 4.250 Pitch Circle Diameter, 4 off Holes 0.437 Diameter To Calculate the power of Coupling required Horse Power of Engine/Engine Speed x Reduction Ratio x 100 = HP/100rpm 150 x 2 x 100 = 12 HP/100 rpm Coupling Required 910-009 Borg Warner
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The R & D 910 Series couplings consist of a contoured flexible disc moulded in tough yet resilient new type Polyester Elastomer. The contoured disc gives clearance for bolt heads and is able to flex freely to take up any temporary misalignment of the engine and shaft, due to flexing of the boat structure or the engine moving on its rubber vibration isolation mountings. Forward thrust is taken in compression on the disc between the two half couplings and reverse thrust is taken again in compression on the disc between the two fail safe straps. In the unlikely event of a disc failure, the steel straps make the coupling fail safe and ensure drive is maintained in both forward and reverse.
Why R&D Marine Flexible Shaft Couplings?Polyurethane flange creates a flexible barrier to reduce drivetrain noise and vibration to quiet your drivetrain Absorbs transmission shock load caused by the propeller and high-speed gear changes. This helps to reduce and avoid costly transmission damage Fail safe design, both forward and reverse thrust is taken in compression from the steel straps, giving a durable design even in extreme conditions
ADVANTAGES OF R & D MARINE FLEXIBLE COUPLINGSThe polyurethane disc is backed up by two metal compression straps, one on either side of the flexible coupling. These metal straps hold the system in constant compression whether the drivetrain is in forward or reverse. This feature extends the life of the system dramatically.The R & D Marine Flexible Coupling will also absorb shock loads resulting from gear changes, or the propeller striking a submerged object. The polyurethane disk will distort with light shock loads and is designed to be sacrificial in the event of severe shock load, saving on expensive drivetrain repairs. If the disc is destroyed from massive shock load the metal compression straps keep the coupling intact ensuring that the drive system is functional in both forward and reverse.

  • Fail Safe

    Fail-safe design ensures continued drive in case of flexible element failure. Exceptional vibration isolation and noise reduction capabilities.Accepts propeller thrust, eliminating the need for separate thrust bearings.

  • Resitance

    Durable polyester elastomer construction, resistant to saltwater, diesel, and oils

  • Quality

    Competitively priced without compromising quality or performance. Trusted by marine professionals worldwide for reliability and longevity. Wide range of configurations for diverse engine and gearbox combinations. Simple periodic alignment checks with red cone-headed bolts
Delivery: We deliver all over Australia directly to both private and commercial customers by courier and post, items can be pre-ordered. Items can also be exported to the US, Europe or Oceania on request via FEDEX or DHL at highly competitive rates
For further inquiries, please complete the contact form below to provide more specific details.
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compressor
Damper Drive plate
Kockum sonics
Flexible coupling
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Steel Shaft Coupling
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