Drive couplings in general
By using drive couplings a connection is made between the driving element such as an electromotor, and the pump. Drive couplings also known as shaft couplings are often used in combination with a bell housing. Findynamica has a complete range of drive couplings for powers ranging from 0,18 to 132 kW available from stock.
Aluminium drive couplings ND
The ND series drive couplings are aluminium with an elastic rubber spider between both halves of the coupling. The ND couplings can be used up to 90 kW power and 725 Nm torque. Thanks to their simple production process ND couplings are cheap to buy and have a long lifespan.
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power range
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max. torque
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ND48
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0,12 kW to 1,5 kW
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6,86 Nm
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ND65
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0,55 kW to 4 kW
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38,2 Nm
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ND86
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2,2 kW to 9 kW
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87,3 Nm
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ND108
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5,5 kW to 30 kW
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210 Nm
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ND143
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30 kW to 90 kW
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725 Nm
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Steel drive couplings OMT
OMT series drive couplings are steel couplings with a white polyamide ring with internal teeth on both sides which you can slide over the two coupling halves. OMT couplings are available in different groups as indicated below.
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power range
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max. torque
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OMT1
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0,12 kW to 0,37 kW
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19,62 Nm
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OMT2
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0,55 kW to 1,5 kW
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42,2 Nm
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OMT3
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2,2 kW to 4 kW
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112,8 Nm
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OMT4
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5,5 kW to 9 kW
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186,4 Nm
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OMT5
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11 kW to 22 kW
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269,8 Nm
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OMT6
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30 kW to 55 kW
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412 Nm
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OMT7
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75 kW to 100 kW
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715,8 Nm
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Steel drive couplings NDG
Series NDG drive couplings are steel drive couplings with an elastic rubber element between both halves of the coupling. The NDG drive couplings are available in different groups as indicated below
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power range
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max. torque
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NDG86
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2,2 kW to 4 kW
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180 Nm
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NDG108
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5,5 kW to 30 kW
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520 Nm
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NDG143
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37 kW to 55 kW
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600 Nm
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NDG160
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75 kW to 132 kW
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2400 Nm
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Chain couplings VL
Series VL chain couplings are steel drive couplings that are connected to each other through a duplex chain. In both halves of the chain coupling there is an internal spline which makes it possible to choose the right drilling for the spline shaft. The VL series drive couplings are available in different groups as indicated below.
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max. power
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VL 19
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0,75 kW
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VL 24
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1,5 kW
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VL 28
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4 kW
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VL 38
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5,5 kW tot 7,5 kW
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VL 42
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11 kW tot 15 kW
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VL 48
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22 kW
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Calculations
The torque required to drive a pump can be calculated as follows:
Required torque in Nm = (1,59 * P * Y) / 80
P = Working pressure in Bar
Y = Displacement in cc/rev
Extensive product documentation
ND-OMT-NDG
Drive couplings
VL Chain couplings