{"id":906,"date":"2026-09-10T04:01:57","date_gmt":"2026-09-10T04:01:57","guid":{"rendered":"https:\/\/nm-coupling.net\/products\/nm67-flexible-coupling\/"},"modified":"2026-09-10T06:14:03","modified_gmt":"2026-09-10T06:14:03","slug":"nm67-flexible-coupling","status":"publish","type":"ep_nm_product","link":"https:\/\/nm-coupling.net\/th\/products\/nm67-flexible-coupling\/","title":{"rendered":"NM67 Flexible Coupling"},"content":{"rendered":"
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Model specifications<\/span><\/p>\n

NM67 technical data<\/h2>\n<\/div>\n

NM67 steps up bore capacity to 28 mm while keeping a relatively short 30 mm axial length. It is a useful candidate when a compact machine has outgrown NM50 on shaft size but does not need the larger envelope of the mid-range couplings.<\/p>\n<\/div>\n

\u0e41\u0e1a\u0e1a\u0e2d\u0e22\u0e48\u0e32\u0e07<\/th>Nominal torque<\/th>Speed limit<\/th>D<\/th>D1<\/th>d max<\/th>L<\/th>S<\/th>Radial<\/th>Angular<\/th><\/tr><\/thead>
NM67<\/a><\/strong><\/td>13 N.m<\/span><\/td>3000 rpm<\/span><\/td>67 mm<\/span><\/td>46 mm<\/span><\/td>28 mm<\/span><\/td>30 mm<\/span><\/td>2.5 +\/- 0.5 mm<\/span><\/td>0.03 mm<\/span><\/td>3.0 deg<\/span><\/td><\/tr><\/tbody><\/table><\/div>

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.<\/p><\/section>\n

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Shaft interface<\/span><\/p>\n

Fit and machining checks<\/h2>\n

The 67 mm outside diameter and 46 mm D1 dimension should be checked against covers, brackets and pump guards. On replacement work, do not assume that an old 25 or 28 mm shaft automatically means NM67; verify the installed envelope and keyway as well.<\/p>\n<\/div>\n

Operating duty<\/span><\/p>\n

Where this size fits<\/h2>\n

With 13 N.m nominal torque and a 3000 rpm speed limit, NM67 can be screened for small pump, fan and general machine drives. The final choice still depends on starting behavior and the driven equipment, not the motor frame alone.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Alignment and assembly<\/h2>\n

NM67 uses a 2.5 +\/- 0.5 mm separation. Its stated radial allowance is 0.03 mm and angular allowance is 3.0 degrees. Keep those values as commissioning boundaries after final base and piping adjustments.<\/p>\n

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D \/ D1<\/strong>67 \/ 46 mm<\/span><\/div>\n
L \/ S<\/strong>30 mm \/ 2.5 +\/- 0.5 mm<\/span><\/div>\n
Alignment<\/strong>0.03 mm radial \/ 3.0 deg angular<\/span><\/div>\n<\/div>\n<\/div>\n
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Prepare the NM67 RFQ<\/h2>\n

Quote requests should identify the motor-side bore, driven-side bore and their keyways separately. Add actual running rpm and the duty description so the 13 N.m rating is evaluated in the right context.<\/p>\n

Use the NM selection guide →<\/a><\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Flexible element<\/span><\/p>\n

Material and service conditions<\/h2>\n<\/div>\n

Specify the elastomer by material requirement rather than colour. NBR is standard for this range; unusual temperature or fluid exposure should be stated before the replacement element is confirmed.<\/p>\n<\/div>\n

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Element<\/h3>\n

State the required material or service environment; do not identify elastomer chemistry by colour alone.<\/p>\n<\/div>\n

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Machining<\/h3>\n

List the driving and driven bores and keyways separately, including controlled fits where required.<\/p>\n<\/div>\n

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Speed<\/h3>\n

NM67 is rated to 3000 rpm; verify actual running speed before final selection.<\/p>\n<\/div>\n

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Torque<\/h3>\n

The nominal rating is 13 N.m. Describe unusual starts, reversing or shock in the enquiry.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Compare the nearest NM sizes<\/h2>\n

When NM67 is close to its torque or bore ceiling, compare NM82. If the duty is much lighter and both shafts fit below 19 mm, NM50 may offer a smaller envelope.<\/p>\n

NM50<\/a>NM82<\/a><\/div>\n<\/div>\n
Compare all NM sizes<\/a><\/div>\n<\/div>\n<\/section>\n
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NM67 quick answers<\/h2>\n
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\nWhat torque and speed define NM67?<\/summary>\n
NM67 is listed at 13 N.m nominal torque with a 3000 rpm rated speed limit.<\/div>\n<\/details>\n
\nHow large can the finished bore be?<\/summary>\n
The stated maximum bore is 28 mm. Bore, keyway and fit still need to be checked together for the ordered hub.<\/div>\n<\/details>\n
\nWhat shaft data should I send?<\/summary>\n
Send the driving and driven shaft diameters, both keyways, running speed, duty, quantity and any drawing-controlled fit.<\/div>\n<\/details>\n<\/div>\n<\/section>","protected":false},"excerpt":{"rendered":"

NM67 provides 13 N.m nominal torque, up to 28 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.<\/p>","protected":false},"featured_media":934,"template":"","class_list":["post-906","ep_nm_product","type-ep_nm_product","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/nm-coupling.net\/th\/wp-json\/wp\/v2\/ep_nm_product\/906","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nm-coupling.net\/th\/wp-json\/wp\/v2\/ep_nm_product"}],"about":[{"href":"https:\/\/nm-coupling.net\/th\/wp-json\/wp\/v2\/types\/ep_nm_product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nm-coupling.net\/th\/wp-json\/wp\/v2\/media\/934"}],"wp:attachment":[{"href":"https:\/\/nm-coupling.net\/th\/wp-json\/wp\/v2\/media?parent=906"}],"curies":[{"name":"\u0e14\u0e31\u0e1a\u0e40\u0e1a\u0e34\u0e25\u0e22\u0e39\u0e1e\u0e35","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}