{"id":2849,"date":"2026-04-02T08:15:30","date_gmt":"2026-04-02T08:15:30","guid":{"rendered":"https:\/\/wheelsprocket.xyz\/product\/coupling-sprocket-nk40b-nk40c\/"},"modified":"2026-04-03T07:39:58","modified_gmt":"2026-04-03T07:39:58","slug":"coupling-sprocket-nk40b-nk40c","status":"publish","type":"product","link":"https:\/\/wheelsprocket.xyz\/zh\/product\/coupling-sprocket-nk40b-nk40c\/","title":{"rendered":"Coupling Sprocket NK40B \/ NK40C"},"content":{"rendered":"
\n\"NK40B<\/p>\n

Technical Specifications \u2014 NK40B \/ NK40C Coupling Sprocket<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u8303\u56f4<\/th>\n\u4ef7\u503c<\/th>\n\u7b14\u8bb0<\/th>\n<\/tr>\n<\/thead>\n
Model<\/td>\nNK40B \/ NK40C<\/td>\nAsian Standard Series<\/td>\n<\/tr>\n
\u6ca5\u9752<\/td>\n12.700 mm<\/td>\n<\/td>\n<\/tr>\n
Tooth Range<\/td>\nZ=9 \u2013 90<\/td>\n<\/td>\n<\/tr>\n
Hub Type<\/td>\nB Type Solid \/ A2 Type Weld<\/td>\n<\/td>\n<\/tr>\n
Bore Range<\/td>\nStock bore to max bore<\/td>\nFinished bore available<\/td>\n<\/tr>\n
\u6750\u6599<\/td>\nC45\u78b3\u94a2<\/td>\n\u786c\u5316\u7684\u7259\u9f7f<\/td>\n<\/tr>\n
\u7259\u9f7f\u786c\u5ea6<\/td>\nHRC 50\u201360<\/td>\n\u611f\u5e94\u6dec\u706b<\/td>\n<\/tr>\n
Surface<\/td>\nBlack oxide \/ Zinc plated<\/td>\n<\/td>\n<\/tr>\n
Coupling Type<\/td>\nRoller chain coupling (duplex wrap)<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u4e3b\u8981\u7279\u70b9<\/h2>\n
\n
\n
<\/div>\n
\n
Roller Chain Flexible Coupling<\/div>\n
Two coupling sprockets and a length of double-strand (duplex) roller chain form a compact flexible coupling that tolerates angular misalignment up to 1\u00b0 and parallel offset up to 0.5 mm.<\/div>\n<\/div>\n<\/div>\n
\n
<\/div>\n
\n
Shock-Load Absorption<\/div>\n
The roller chain element absorbs shock and vibration between motor and load \u2014 protecting gearboxes, pumps, and driven machines from torque spikes common in start-stop operations.<\/div>\n<\/div>\n<\/div>\n
\n
\u2699\ufe0f<\/div>\n
\n
Easy Maintenance<\/div>\n
Chain coupling disassembly requires only disconnecting the roller chain link \u2014 no alignment tools or heat required. Chain replacement restores full coupling performance without disturbing shaft alignment.<\/div>\n<\/div>\n<\/div>\n
\n
<\/div>\n
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High Torque Capacity<\/div>\n
Double-strand roller chain wraps two tooth profiles simultaneously, providing significantly higher torque capacity per unit diameter than jaw or disc couplings of equivalent size.<\/div>\n<\/div>\n<\/div>\n<\/div>\n

Compatibility<\/h2>\n

The NK40B \/ NK40C coupling sprocket is used as a matched pair with a duplex (double-strand) roller chain forming a complete roller-chain coupling. Both sprockets must be the same model and tooth count. Bore finished to your shaft diameter; keyway and set-screw included on solid-hub types. \u8054\u7cfb\u6211\u4eec\u7684\u56e2\u961f<\/a> for torque and misalignment calculations.<\/p>\n

\u5e94\u7528\u7a0b\u5e8f<\/h2>\n
\n
\n\"Pump<\/p>\n
\n
Pump Drives<\/div>\n
Motor-to-pump coupling in water treatment, mining dewatering, and agriculture<\/div>\n<\/div>\n<\/div>\n
\n\"Agricultural<\/p>\n
\n
Agricultural PTO<\/div>\n
PTO shaft coupling on tractors, balers, and irrigation pump drives<\/div>\n<\/div>\n<\/div>\n
\n\"Fan<\/p>\n
\n
Fan & Blower Drives<\/div>\n
HVAC fan, industrial blower, and cooling tower motor-to-shaft coupling<\/div>\n<\/div>\n<\/div>\n
\n\"Gearbox<\/p>\n
\n
\u26cf\ufe0f Gearbox Coupling<\/div>\n
Motor-to-gearbox flexible coupling on conveyor, crusher, and mixer drives<\/div>\n<\/div>\n<\/div>\n<\/div>\n

<\/span>\u7528\u6237\u8bc4\u4ef7<\/h2>\n
\n
Alan W.  \u2605\u2605\u2605\u2605\u2605<\/span>   \u6fb3\u5927\u5229\u4e9a<\/span><\/div>\n
“NK40B \/ NK40C coupling sprockets fitted to our pump drives \u2014 running flawlessly for 18 months with no chain replacement needed yet. Excellent value.”<\/div>\n
NK40B \/ NK40C Z=9 Coupling Sprocket · March 2025<\/div>\n<\/div>\n
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Dieter H.  \u2605\u2605\u2605\u2605\u2605<\/span>   Germany<\/span><\/div>\n
“Bore tolerance is excellent \u2014 h6 shaft fit, zero wobble. The chain coupling performs quieter than the jaw coupling it replaced.”<\/div>\n
NK40B \/ NK40C Z=12 Coupling Sprocket · January 2025<\/div>\n<\/div>\n
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Asha R.  \u2605\u2605\u2605\u2605\u2606<\/span>   South Africa<\/span><\/div>\n
“Good quality. Delivery to Johannesburg took 12 days \u2014 acceptable. Would have given 5 stars with faster freight.”<\/div>\n
NK40B \/ NK40C Z=10 Coupling Sprocket · February 2025<\/div>\n<\/div>\n
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Brett M.  \u2605\u2605\u2605\u2605\u2605<\/span>   New Zealand<\/span><\/div>\n
“Perfect for our irrigation pump coupling refurbishment. Fitted both sprockets and new chain in under an hour.”<\/div>\n
NK40B \/ NK40C Z=11 Coupling Sprocket · April 2025<\/div>\n<\/div>\n

\u5e38\u95ee\u95ee\u9898<\/h2>\n
\n\n►  How many teeth do I need for a coupling sprocket pair?<\/summary>\n
Both coupling sprockets must have the same tooth count. The most common tooth counts are 9, 10, 11, and 12. More teeth = smoother operation but larger coupling diameter.<\/div>\n<\/details>\n
\n\n►  What chain do I use with coupling sprockets?<\/summary>\n
Roller chain coupling assemblies use a length of double-strand (duplex) roller chain in the appropriate pitch. The chain pitch must match the sprocket pitch exactly.<\/div>\n<\/details>\n
\n\n►  How much misalignment can a roller chain coupling tolerate?<\/summary>\n
Typically \u00b11\u00b0 angular misalignment and \u00b10.5 mm parallel offset at the rated torque. Misalignment beyond these limits increases chain and sprocket wear significantly.<\/div>\n<\/details>\n
\n\n►  Do you supply the complete coupling set (sprocket pair + chain)?<\/summary>\n
Yes. We can supply matched pairs of coupling sprockets with the appropriate length of duplex chain and chain housing (cover) as a complete coupling kit. Contact us for full kit pricing.<\/div>\n<\/details>\n
\n\n►  What is the maximum torque for the NK80B coupling sprocket?<\/summary>\n
Torque capacity depends on tooth count and chain pitch. For NK80B Z=10, typical rated torque is 350\u2013500 Nm depending on speed. Contact our engineering team for a precise calculation for your application.<\/div>\n<\/details>\n
    \n
  1. Finish-bore both coupling sprockets to the respective shaft diameters; cut keyways to drawing.<\/li>\n
  2. Mount sprockets on their respective shafts; align shafts using a dial indicator \u2014 target less than 0.1 mm TIR on coupling hub face.<\/li>\n
  3. Wrap the duplex roller chain around both sprockets and close with a connecting link.<\/li>\n
  4. Install the chain coupling housing (cover) if required for guard compliance or lubrication retention.<\/li>\n
  5. Verify shaft alignment monthly during the first 3 months of operation and re-check after any unexpected load or vibration event.<\/li>\n<\/ol>\n
    \u2713 ISO 9001:2015<\/span>\u2713 ANSI B29.1<\/span>\u2713 ISO\/DIN 8187<\/span>\u2713 JIS B 1801<\/span>\u2713 BS\/DIN \u6807\u51c6<\/span>\u2713 \u82f1\u56fd\u6807\u51c6<\/span><\/div>\n
    \n
    \n\"\u6c38\u52a8\u529b\u5de5\u5382\"<\/p>\n
    \n

    \u4e3a\u4ec0\u4e48\u9009\u62e9 Ever-power Australia\uff1f<\/h3>\n

    \u6211\u4eec\u662f\u4e00\u5bb6\u5782\u76f4\u6574\u5408\u7684\u5236\u9020\u5546\uff0c\u62e5\u6709\u8d85\u8fc725\u5e74\u7684\u94fe\u4f20\u52a8\u7ecf\u9a8c\u3002\u6211\u4eec\u7684\u5de5\u5382\u5360\u573035,000\u5e73\u65b9\u7c73\uff0c\u5e74\u4ea7\u91cf\u8d85\u8fc7400\u4e07\u4e2a\u94fe\u8f6e\u3002\u6211\u4eec\u4e3a\u6fb3\u5927\u5229\u4e9a\u5404\u5730\u7684OEM\u5408\u4f5c\u4f19\u4f34\u3001\u5206\u9500\u5546\u548c\u76f4\u63a5\u5de5\u4e1a\u4e70\u5bb6\u4f9b\u8d27\uff0c\u4ea7\u54c1\u7b26\u5408GB\u3001ISO\u3001ANSI\u3001JIS\u3001DIN\u548cBS\u6807\u51c6\u3002<\/p>\n

    \nISO 9001\u8ba4\u8bc1<\/span>
    \n\u6bcf\u5e74400\u4e07\u4ef6\u4ee5\u4e0a<\/span>
    \n\u5177\u5907OEM\u80fd\u529b<\/span>
    \n\u6fb3\u5927\u5229\u4e9a\u73b0\u8d27\u4f9b\u5e94<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n
    \n

    \u51c6\u5907\u4e0b\u5355\uff1f\u7acb\u5373\u83b7\u53d6\u514d\u8d39\u62a5\u4ef7<\/h3>\n

    \u6211\u4eec\u7684\u5de5\u7a0b\u56e2\u961f\u5168\u5929\u5019 (24\/7) \u4e3a\u6fb3\u5927\u5229\u4e9a\u4f01\u4e1a\u63d0\u4f9b\u89c4\u683c\u5236\u5b9a\u3001\u5b9a\u5236\u8bbe\u8ba1\u548c\u6279\u91cf\u5b9a\u4ef7\u65b9\u9762\u7684\u534f\u52a9\u3002<\/p>\n

    \ud83d\udce9 \u7d22\u53d6\u62a5\u4ef7<\/a>
    \n 
    \n    \ud83d\udd0d\u6d4f\u89c8\u6240\u6709\u4ea7\u54c1<\/a><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

    \u8fd9 NK40B \/ NK40C coupling sprocket<\/strong> (12.700 mm pitch, 25.4) is purpose-designed for roller chain flexible coupling assemblies<\/strong>, connecting motor and driven shafts with inherent flexibility to tolerate small misalignments and dampen shock loads. Available in solid (B Type) and welded (A2 Weld) hub configurations across Z=9 \u2013 90, it is the preferred shaft coupling solution in Australian pump, fan, conveyor, and gearbox applications.<\/p>","protected":false},"featured_media":2725,"comment_status":"closed","ping_status":"open","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_cat":[6693,6986,7059],"product_tag":[6860,6858,6857,6859],"class_list":{"0":"post-2849","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-sprockets","7":"product_cat-coupling-sprockets","8":"product_cat-standard-sprockets","9":"product_tag-40-chain-coupling","10":"product_tag-chain-coupling-sprocket","11":"product_tag-coupling-sprocket-nk40","12":"product_tag-flexible-coupling-sprocket","14":"first","15":"instock","16":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/wheelsprocket.xyz\/zh\/wp-json\/wp\/v2\/product\/2849","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wheelsprocket.xyz\/zh\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/wheelsprocket.xyz\/zh\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/wheelsprocket.xyz\/zh\/wp-json\/wp\/v2\/comments?post=2849"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wheelsprocket.xyz\/zh\/wp-json\/wp\/v2\/media\/2725"}],"wp:attachment":[{"href":"https:\/\/wheelsprocket.xyz\/zh\/wp-json\/wp\/v2\/media?parent=2849"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/wheelsprocket.xyz\/zh\/wp-json\/wp\/v2\/product_cat?post=2849"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/wheelsprocket.xyz\/zh\/wp-json\/wp\/v2\/product_tag?post=2849"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}