example

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FLEXIBLE SHAFT COUPLINGS

• Reduce noise and vibration • Simple to install • Cost effective • Aids engine alignment and allows easy checking • ‘Fail safe’ design

Example: Ford 150 HP @ 2500 RPM PRM 750 2:1 reduction gearbox 6” flange, 3” register, 4.75” PCD, 6 holes, 0.50” diameter To calculate the power of the coupling required: (HP of engine x reduction of gearbox x 100) divided by revs = HP per 100 RPM (150 x 2 x 100) divided by 2500 = 12 HP per 100 RPM Therefore you would need an 807103 R & D flexible shaft coupling. • Designed to absorb thrust • Contoured resilient polyester elastomer disc • Supplied complete with bolts and nuts (excluding 807121 and 807160 ) • Minimum to maximum gap difference = 0.25mm / 0.010” • Earth bonding system available

HOW TO SELECT YOUR FLEXIBLE R & D COUPLING

You will need the following details: •

Engine horse power and engine speed Gearbox type and reduction ratio

•

• Gearbox flange details: Diameter of flange, diameter of register, pitch circle diameter (The pitch circle diameter is the distance between the centre of the hole at 12 o’clock position to the centre of the hole at the 6 o’clock position) of fixing holes, size and quantity of holes. Use the following tables for more detail

R & D FLEXIBLE SHAFT COUPLING BASIC SELECTION GUIDE

DRIVETRAIN Gearbox BorgWarner

Application

Part no.

Gearbox Application

Part no.

807114, 807101, 807104

807109, 807144 807160 (no bolts)

500, 1000 + 71C 4”

TMP

5” Flange

807109

71C 5” 72C 5”

Replaces Silentbloc 50 coupling MG502 (with adaptor 807248)

807109, 807129, 807144

807103, 807125, 807132 807106, 807126, 807133

807109, 807129

5000

MG5050, MG5061 MG506, MG507 MG5081, MG5091 MG509, 510, 511

Twin Disc

807103, 807125, 807132

807106, 807126, 807133, 807117

73C + 7000

807128, 807113 807121 (no bolts) 807114, 807101

807117 807117 807107

Bukh

Enfield & Sonic -

Hurth*

Volvo MS and RB

807114, 807101, 807104

807119, 807120

50, 100, 125, 150, 250

MS2

807109, 807129

807109

360, 450 + 630

MS3, MS4

807106, 807126, 807133

807109, 807129 807102, 807143

800

MS5

807003

Lister

Yanmar

4” 5”

807114, 807101, 807104

807112 807137

Newage PRM Delta 150, 80, 120

807109

100, 101, 140, 160, 260 175, 265, 500, 750, 310 401, 402, 601 3:1, 1000 3:1

130mm

807103, 807125

807109, 807129

IRM41, IRM50

807103, 807125, 807132

IRM220A (with adaptor 807247)

807118, 807140

IRM301 807106, 807126, 807133 Twin Disc 502 (with adaptor 807248) 807103, 807125, 807132

601, 1000 (4:1 only)

807105

Paragon

4”

807114, 807101, 807104

Technodrive Model TM 4”

*Where a Hurth gearbox is fitted behind a Volvo Penta engine, the coupling may have a 60mm register and 4 bolts on 80mm PCD.

SHAFT COUPLINGS

807125

807133

Part no.

Gearbox Flange Dimensions

Flexible Coupling Details

Earth Bonding Strip

Diameter

No. of Bolts

Bolt Hole Diameter

Bolt PCD

Maximum Diameter

Length

Bolt Diameter

Capacity (HP per 100 RPM)

inch

Shaft Couplings To Suit 6 Bolt Flange

807003 807103 807106 807125 807126 807132 807133 807117 807118 807140

807739 807739 807739 807740 807740 807742 807742 807740 807740 807741

120.7 4.75” 146 5.75” 146 5.75” 146 5.75” 146 5.75” 146 5.75” 146 5.75” 184.2 7.25” 184.2 7.25” 184.2 7.25”

6 11.2 0.44” 98.5 3.875” 63.5 2.5” 150.9 5.94” 69.9 2.75” 7/16” UNF 10

6 6 6 6 6 6 6 6 6

12.7 0.50” 120.6 4.75” 76.2 3” 16 0.63” 120.6 4.75” 76.2 3” 12.7 0.50” 120.6 4.75” 76.2 3” 16 0.63” 120.6 4.75” 76.2 3” 12.7 0.50” 120.6 4.75” 76.2 3” 16 0.63” 120.6 4.75” 76.2 3”

152.4 6” 152.4 6” 152.4 6” 152.4 6” 152.4 6” 152.4 6”

47.5 1.87” 1/2” UNF 47.5 1.87” 1/2” UNF 49.8 1.96” 1/2” UNF 49.8 1.96” 1/2” UNF 55.4 2.18” 1/2” UNF 55.4 2.18” 1/2” UNF

20 20 28 28 37 37 40 40 55

19 0.75” 152.4 6” 16 0.625” 152.4 6” 19 0.75” 152.4 6”

95.25 3.75” 190.5 7.50” 60.7 2.39” 5/8” UNF 95.25 3.75” 190.5 7.50” 60.7 2.39” 5/8” UNF 95.25 3.75” 190.5 7.50” 63.3 2.49” 5/8” UNF

For extra isolation, use two flexible couplings in conjunction with a coupling bobbin, see page 39. To convert imperial into metric, multiply by 25.4

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