{"id":2855,"date":"2026-04-02T08:16:34","date_gmt":"2026-04-02T08:16:34","guid":{"rendered":"https:\/\/wheelsprocket.xyz\/product\/stock-bore-sprocket-nk40b-nk40c\/"},"modified":"2026-04-03T07:51:20","modified_gmt":"2026-04-03T07:51:20","slug":"stock-bore-sprocket-nk40b-nk40c","status":"publish","type":"product","link":"https:\/\/wheelsprocket.xyz\/vi\/product\/stock-bore-sprocket-nk40b-nk40c\/","title":{"rendered":"Stock Bore Sprocket NK40B \/ NK40C"},"content":{"rendered":"
\n\"NK40B<\/p>\n

Technical Specifications \u2014 NK40B \/ NK40C Stock Bore Sprocket<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Tham s\u1ed1<\/th>\nGi\u00e1 tr\u1ecb<\/th>\nGhi ch\u00fa<\/th>\n<\/tr>\n<\/thead>\n
Model \/ Series<\/td>\nNK40B \/ NK40C<\/td>\nAsian Standard \/ NK Series<\/td>\n<\/tr>\n
S\u00e2n b\u00f3ng \u0111\u00e1<\/td>\n12.700 mm (1\/2″)<\/td>\n<\/td>\n<\/tr>\n
Roller Diameter<\/td>\n7.95 mm<\/td>\n<\/td>\n<\/tr>\n
Tooth Width (T)<\/td>\n2.8 mm<\/td>\n<\/td>\n<\/tr>\n
Ph\u1ea1m vi r\u0103ng<\/td>\nZ=10\u201390<\/td>\n<\/td>\n<\/tr>\n
Hub Types<\/td>\nB\/C Type Solid; B\/C Type Weld<\/td>\nSolid or welded<\/td>\n<\/tr>\n
V\u1eadt li\u1ec7u<\/td>\nC45 Carbon Steel<\/td>\nHardened teeth<\/td>\n<\/tr>\n
\u0110\u1ed9 c\u1ee9ng c\u1ee7a r\u0103ng<\/td>\nHRC 50\u201360<\/td>\nInduction hardened<\/td>\n<\/tr>\n
B\u1ec1 m\u1eb7t<\/td>\nBlack oxide \/ plain<\/td>\n<\/td>\n<\/tr>\n
Bore<\/td>\nStock bore (machined to drawing)<\/td>\nFinished bore available<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

C\u00e1c t\u00ednh n\u0103ng ch\u00ednh<\/h2>\n
\n
\n
<\/div>\n
\n
Asian Standard NK Series<\/div>\n
Manufactured to the established NK (Asian) standard used across Asia-Pacific markets \u2014 ensures compatibility with locally available chain and drive components at competitive pricing.<\/div>\n<\/div>\n<\/div>\n
\n
<\/div>\n
\n
Induction-Hardened Teeth<\/div>\n
HRC 50\u201360 tooth surface hardness delivers 3\u00d7 the wear life of un-treated equivalents, reducing replacement frequency and total cost of ownership in demanding industrial environments.<\/div>\n<\/div>\n<\/div>\n
\n
<\/div>\n
\n
Multiple Hub Configurations<\/div>\n
B Type (single hub) and C Type (double hub) in both solid bore and welded hub styles cover the full range of shaft mounting requirements from standard drives to heavy-load gearbox outputs.<\/div>\n<\/div>\n<\/div>\n
\n
<\/div>\n
\n
Stock Availability<\/div>\n
Major tooth counts maintained in stock for 2\u20135 day dispatch to anywhere in Australia, minimising production downtime when replacement is needed urgently.<\/div>\n<\/div>\n<\/div>\n<\/div>\n

Compatibility<\/h2>\n

The NK40B \/ NK40C sprocket is designed for 12.700 mm pitch industrial roller chain. Bore is supplied to drawing or standard stock bore; specify shaft diameter for finished bore versions. Keyway and set-screw options available on solid hub types. View our full NK sprocket range<\/a>.<\/p>\n

<\/span>\u1ee8ng d\u1ee5ng<\/h2>\n
\n
\n\"General<\/p>\n
\n
General Industry<\/div>\n
Conveyor, pump, fan, and general machinery chain drives<\/div>\n<\/div>\n<\/div>\n
\n\"Agricultural<\/p>\n
\n
Agricultural Equipment<\/div>\n
Grain handling, irrigation, and processing equipment drives<\/div>\n<\/div>\n<\/div>\n
\n\"Construction<\/p>\n
\n
\u26cf\ufe0f Construction & Mining<\/div>\n
Auxiliary drives on excavation, crushing, and handling equipment<\/div>\n<\/div>\n<\/div>\n
\n\"Processing<\/p>\n
\n
Processing Lines<\/div>\n
Food, beverage, and packaging machine chain drives<\/div>\n<\/div>\n<\/div>\n<\/div>\n

\u0110\u00e1nh gi\u00e1 c\u1ee7a kh\u00e1ch h\u00e0ng<\/h2>\n
\n
\nDavid W.<\/span>
\n\u2605\u2605\u2605\u2605\u2605<\/span>
\n Australia<\/span><\/div>\n
“Running NK40B \/ NK40C sprockets on our conveyor drive for 18 months \u2014 no wear issues, no adjustment needed. Great value for money.”<\/div>\n
NK40B \/ NK40C Z=19 B Type · March 2025<\/div>\n<\/div>\n
\n
\nHiroshi T.<\/span>
\n\u2605\u2605\u2605\u2605\u2605<\/span>
\n Japan<\/span><\/div>\n
“Dimensional accuracy of the NK40B \/ NK40C meets our in-house standard. Tooth profile is clean and consistent.”<\/div>\n
NK40B \/ NK40C Z=23 C Type · January 2025<\/div>\n<\/div>\n
\n
\nLin F.<\/span>
\n\u2605\u2605\u2605\u2605\u2606<\/span>
\n Taiwan<\/span><\/div>\n
“Good quality NK series sprockets at competitive price. Lead time is reasonable for non-stock sizes.”<\/div>\n
NK40B \/ NK40C Z=15 Weld Type · February 2025<\/div>\n<\/div>\n
\n
\nAdam K.<\/span>
\n\u2605\u2605\u2605\u2605\u2605<\/span>
\n UK<\/span><\/div>\n
“Excellent product. We import these for our conveyor refurbishment business \u2014 consistent quality order after order.”<\/div>\n
NK40B \/ NK40C Z=21 B Type · April 2025<\/div>\n<\/div>\n

C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n
\n\n►  What chain does the NK series sprocket use?<\/summary>\n
The NK40B \/ NK40C sprocket is designed for 12.700 mm pitch roller chain of Asian-standard origin (matching ANSI-derived dimensions). Always verify inner width and roller diameter when selecting chain.<\/div>\n<\/details>\n
\n\n►  What is the difference between B Type Solid and B Type Weld?<\/summary>\n
B Type Solid has a machined hub bore (standard or finished to drawing). B Type Weld has a welded-on hub plate for applications where the sprocket must be welded to a shaft stub or disc.<\/div>\n<\/details>\n
\n\n►  Are finished bore versions available?<\/summary>\n
Yes. Specify your shaft diameter and keyway dimensions at order. Finished bore lead time is 5\u20137 days from order confirmation.<\/div>\n<\/details>\n
\n\n►  Can I get a material test certificate for the C45 steel?<\/summary>\n
Yes. EN 10204 2.2 chemical composition certificates are available on request. Contact us before ordering to arrange documentation.<\/div>\n<\/details>\n
\n\n►  What is the maximum bore for each tooth count?<\/summary>\n
Maximum bore increases with tooth count. Contact our sales team with your tooth count and required bore diameter \u2014 we will confirm feasibility and maximum available bore.<\/div>\n<\/details>\n
    \n
  1. Verify bore size against shaft diameter; machine finished bore if required.<\/li>\n
  2. Clean shaft and bore; apply light machine oil to ease assembly.<\/li>\n
  3. Position sprocket and align within 0.5 mm lateral offset of the mating sprocket.<\/li>\n
  4. Install roller chain and set slack-side tension to 2% of centre distance.<\/li>\n
  5. Check all set-screws and key fit after initial 4-hour loaded operation.<\/li>\n<\/ol>\n
    \u2713 ISO 9001:2015<\/span>\u2713 ANSI B29.1<\/span>\u2713 ISO\/DIN 8187<\/span>\u2713 Ti\u00eau chu\u1ea9n JIS B 1801<\/span>\u2713 Ti\u00eau chu\u1ea9n BS\/DIN<\/span>\u2713 Ti\u00eau chu\u1ea9n GB<\/span><\/div>\n
    \n
    \n\"Nh\u00e0<\/p>\n
    \n

    T\u1ea1i sao n\u00ean ch\u1ecdn Everpower Australia?<\/h3>\n

    Ch\u00fang t\u00f4i l\u00e0 nh\u00e0 s\u1ea3n xu\u1ea5t t\u00edch h\u1ee3p theo chi\u1ec1u d\u1ecdc v\u1edbi h\u01a1n 25 n\u0103m kinh nghi\u1ec7m trong l\u0129nh v\u1ef1c truy\u1ec1n \u0111\u1ed9ng x\u00edch. Nh\u00e0 m\u00e1y c\u1ee7a ch\u00fang t\u00f4i r\u1ed9ng 35.000 m\u00b2 v\u00e0 s\u1ea3n xu\u1ea5t h\u01a1n 4 tri\u1ec7u b\u00e1nh r\u0103ng m\u1ed7i n\u0103m. Ch\u00fang t\u00f4i cung c\u1ea5p cho c\u00e1c \u0111\u1ed1i t\u00e1c OEM, nh\u00e0 ph\u00e2n ph\u1ed1i v\u00e0 ng\u01b0\u1eddi mua c\u00f4ng nghi\u1ec7p tr\u1ef1c ti\u1ebfp tr\u00ean kh\u1eafp n\u01b0\u1edbc \u00dac, v\u1edbi c\u00e1c s\u1ea3n ph\u1ea9m \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n GB, ISO, ANSI, JIS, DIN v\u00e0 BS.<\/p>\n

    \n\u0110\u1ea1t ch\u1ee9ng nh\u1eadn ISO 9001<\/span>
    \nH\u01a1n 4 tri\u1ec7u chi\u1ebfc\/n\u0103m<\/span>
    \nC\u00f3 kh\u1ea3 n\u0103ng OEM<\/span>
    \nH\u00e0ng c\u00f3 s\u1eb5n t\u1ea1i \u00dac<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n
    \n

    S\u1eb5n s\u00e0ng \u0111\u1eb7t h\u00e0ng? Nh\u1eadn b\u00e1o gi\u00e1 mi\u1ec5n ph\u00ed ngay h\u00f4m nay!<\/h3>\n

    \u0110\u1ed9i ng\u0169 k\u1ef9 s\u01b0 c\u1ee7a ch\u00fang t\u00f4i lu\u00f4n s\u1eb5n s\u00e0ng 24\/7 \u0111\u1ec3 h\u1ed7 tr\u1ee3 c\u00e1c doanh nghi\u1ec7p \u00dac v\u1ec1 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt, thi\u1ebft k\u1ebf t\u00f9y ch\u1ec9nh v\u00e0 gi\u00e1 b\u00e1n s\u1ec9.<\/p>\n

    \ud83d\udce9 Y\u00eau c\u1ea7u b\u00e1o gi\u00e1<\/a>
    \n 
    \n    \ud83d\udd0d Xem t\u1ea5t c\u1ea3 s\u1ea3n ph\u1ea9m<\/a><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

    C\u00e1i NK40B \/ NK40C stock bore sprocket<\/strong> (12.700 mm pitch, 1\/2″) is an Asian-standard (NK-series) industrial sprocket<\/strong> in C45 carbon steel with hardened teeth, designed for medium-to-heavy chain drives across conveyors, pumps, and general industrial machinery. Available in B and C hub types, with solid bore and welded hub options across Z=10\u201390, it delivers reliable, cost-effective power transmission for Australian industrial applications.<\/p>","protected":false},"featured_media":2731,"comment_status":"closed","ping_status":"open","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_cat":[6693,7059],"product_tag":[6884,6885,6882,6883],"class_list":{"0":"post-2855","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-sprockets","7":"product_cat-standard-sprockets","8":"product_tag-12-7mm-stock-bore-sprocket","9":"product_tag-asian-standard-industrial-sprocket","10":"product_tag-nk40b-sprocket","11":"product_tag-nk40c-sprocket","13":"first","14":"instock","15":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/wheelsprocket.xyz\/vi\/wp-json\/wp\/v2\/product\/2855","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wheelsprocket.xyz\/vi\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/wheelsprocket.xyz\/vi\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/wheelsprocket.xyz\/vi\/wp-json\/wp\/v2\/comments?post=2855"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wheelsprocket.xyz\/vi\/wp-json\/wp\/v2\/media\/2731"}],"wp:attachment":[{"href":"https:\/\/wheelsprocket.xyz\/vi\/wp-json\/wp\/v2\/media?parent=2855"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/wheelsprocket.xyz\/vi\/wp-json\/wp\/v2\/product_cat?post=2855"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/wheelsprocket.xyz\/vi\/wp-json\/wp\/v2\/product_tag?post=2855"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}