Product appearance varies with coupling size and finished bore. Use the model table below for dimensions and send both shaft details for machining.
NM82 Flexible Coupling
NM82 provides 28 N.m nominal torque, up to 32 mm bore capacity and a rated speed limit of 3000 rpm. It is suited to compact pumps, fans and light machinery when torque, shaft fit, alignment and installation space are all within the model limits.
NM82 technical data
NM82 sits between the compact NM67 and the larger-bore NM97. Its 32 mm maximum bore makes it relevant to many small and medium rotating-equipment interfaces where shaft fit becomes the first sizing filter.
| Model | Nominal torque | Speed limit | D | D1 | d max | L | S | Radial | Angular |
|---|---|---|---|---|---|---|---|---|---|
| NM82 | 28 N.m | 3000 rpm | 82 mm | 53 mm | 32 mm | 40 mm | 3.0 +/- 1.0 mm | 0.05 mm | 3.0 deg |
D, D1, d max, L, S and radial values are in millimetres. Angular displacement is shown in degrees. On smaller screens, drag the table horizontally to view all columns.
Fit and machining checks
Check the 82 mm outside diameter, 53 mm D1 and 40 mm length against the actual machine space. A coupling can satisfy torque and still be awkward to install if the guard opening or shaft projection is limited.
Where this size fits
The nominal rating is 28 N.m with a 3000 rpm speed limit. NM82 can be evaluated for pump sets, blowers and machinery with moderate continuous duty, but loaded starts and repeated cycling should be stated rather than hidden inside a generic motor-power figure.
Alignment and assembly
Use the 3.0 +/- 1.0 mm S value when positioning the hubs. The stated radial limit is 0.05 mm and the angular limit is 3.0 degrees; verify them after the machines are fully assembled and tightened.
Prepare the NM82 RFQ
An efficient NM82 RFQ includes both bore/keyway requirements, running speed, design torque or motor power, the driven machine and quantity. For a retrofit, add the old coupling envelope so installation space can be compared before machining.
Material and service conditions
The standard NBR element provides the flexible connection for this range. If service includes oil, heat, chemicals or unusual cycling, describe that environment and request the required polymer or hardness explicitly.
Compare the nearest NM sizes
If a shaft exceeds 32 mm or the torque margin is too small, move the comparison to NM97. Where packaging is very tight, also check whether NM67 can satisfy both bore and duty.
