The NM range on this site is organized by actual model size, not by generic “small / medium / large” marketing labels. Ten model pages carry the published technical values for NM50 through NM214. Replacement elastomer enquiries and custom bore/keyway work are handled as configuration requests against those model sizes.
Choose the entity you are actually buying.
A complete NM coupling, an elastomer ring and an adjacent coupling family are not interchangeable product records. Keeping them separate prevents a specification from one construction appearing on another.
Complete NM Couplings
Ten model sizes with separate torque, speed, bore, dimension and alignment data.
Compare models →
Replacement Elastomer Rings
NBR baseline plus application-reviewed material or hardness requests.
Replacement guide →
Related Flexible Couplings
Source-pack HRC, pump-claw and star-coupling families kept separate from NM specifications.
View related families →NM50-NM214 technical table
Use the horizontal scroll bar on smaller screens. The table keeps the complete dimension set available instead of hiding columns on mobile.
| Model | Nominal torque | Speed limit | D | D1 | d max | L | S | Radial | Angular |
|---|---|---|---|---|---|---|---|---|---|
| NM50 | 5 N.m | 3000 rpm | 50 mm | 33 mm | 19 mm | 25 mm | 2 +/- 0.5 mm | 0.03 mm | 3.0 deg |
| NM67 | 13 N.m | 3000 rpm | 67 mm | 46 mm | 28 mm | 30 mm | 2.5 +/- 0.5 mm | 0.03 mm | 3.0 deg |
| 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 |
| NM97 | 45 N.m | 3000 rpm | 97 mm | 69 mm | 42 mm | 50 mm | 3.0 +/- 1.0 mm | 0.05 mm | 2.5 deg |
| NM112 | 70 N.m | 3000 rpm | 112 mm | 79 mm | 48 mm | 60 mm | 3.5 +/- 1.0 mm | 0.07 mm | 2.5 deg |
| NM128 | 140 N.m | 3000 rpm | 128 mm | 90 mm | 55 mm | 70 mm | 3.5 +/- 1.0 mm | 0.07 mm | 2.5 deg |
| NM148 | 280 N.m | 3000 rpm | 148 mm | 107 mm | 65 mm | 80 mm | 3.5 +/- 1.0 mm | 0.07 mm | 2.0 deg |
| NM168 | 500 N.m | 3000 rpm | 168 mm | 124 mm | 75 mm | 90 mm | 3.5 +/- 1.5 mm | 0.10 mm | 2.0 deg |
| NM194 | 840 N.m | 1500 rpm | 194 mm | 140 mm | 85 mm | 100 mm | 3.5 +/- 1.5 mm | 0.10 mm | 2.0 deg |
| NM214 | 1000 N.m | 1500 rpm | 214 mm | 157 mm | 95 mm | 110 mm | 4.0 +/- 2.0 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.
Open the size that matches your first torque and bore screen.
Each page repeats only that model’s supported values and adds application, interface and RFQ guidance around the data.
NBR is the documented baseline; alternatives are quotation items.
The source range describes an NBR flexible ring. When a project calls for a different hardness or polymer, specify the operating environment and required behavior instead of selecting by color. Final chemistry, hardness, temperature capability and torque behavior need production confirmation.
Useful elastomer RFQ details
Tell us the existing NM size, operating temperature, exposure to oil or cleaning chemicals, whether shock isolation or torsional stiffness is the priority, and the number of replacement rings. If you are replacing an unknown element, include measured dimensions and photos, but do not rely on color as the identifier.
Related flexible-coupling families in the source pack.
These images come from the uploaded coupling catalogue and are shown only as adjacent product families. They are not used to prove NM dimensions or ratings.
HRC Couplings
Authorized product crop from the uploaded coupling catalogue. Shown as a related family, not as NM technical evidence.
Pump Claw Couplings
Authorized product crop from the uploaded coupling catalogue. Shown as a related family, not as NM technical evidence.
Star Flexible Couplings
Authorized TS-A product crop from the uploaded coupling catalogue. Shown as a related family, not as NM technical evidence.
