Representative NM coupling illustration. Final bore, keyway, hub material and elastomer request are confirmed in the quotation.
NM194 Flexible Coupling
NM194 is the NM194 model in the EVER POWER NM range, with 840 N.m nominal torque, 85 mm maximum bore and a published speed limit of 1500 rpm. It is a starting point for higher-torque industrial pump, compressor and process-equipment drives; final selection still depends on actual duty and shaft data.
NM194 technical specifications
Use these published values to screen the size. Bore machining, keyway, hub material, elastomer specification and transient duty are quotation items rather than assumptions.
| Model | Nominal torque | Speed limit | D | D1 | d max | L | S | Radial | Angular |
|---|---|---|---|---|---|---|---|---|---|
| NM194 | 840 N.m | 1500 U/min | 194 mm | 140 mm | 85 mm | 100 mm | 3.5 +/- 1.5 mm | 0.10 mm | 2.0 deg |
D, D1, d max, L, S and radial values are in millimetres. Angular displacement is shown in degrees. Table scrolls horizontally on narrow screens.
Check the shaft interface before ordering.
Most wrong-coupling orders begin with an incomplete shaft description. Measure both sides independently and do not assume identical bores.
Where NM194 can fit
This size can be evaluated for pump, compressor, blower, mixer, conveyor and general machinery connections when the required continuous torque stays within the published nominal rating and the shaft bores fit the available hub capacity. Real duty matters: starts per hour, reversing, shock, ambient conditions and the driven machine can all change the appropriate size.
Use the coupling to accommodate the documented alignment allowance, not as a substitute for poor machine alignment. If the shafts cannot be brought within the published radial and angular values, correct the machine setup before commissioning.
What to send for a useful quote
Give us the driving and driven shaft diameters, keyway dimensions, running speed, design torque or motor power, quantity and destination. If the application sees frequent starts, reversing or shock, mention that as well. For replacements, a photo of the old hubs and elastomer can help identify the interface, but dimensional confirmation still takes priority.
Specify what the duty actually needs.
The baseline product information identifies an NBR elastomer and lubrication-free operation. Alternative elastomer hardness or hub materials should be treated as RFQ options and confirmed against the application rather than inferred from color.
Compare adjacent NM sizes before freezing the bore.
A larger hub may solve a bore constraint, but moving up a size also changes the coupling envelope. Compare torque, bore capacity, D, L and speed together.
