{"id":259,"date":"2026-07-31T07:02:43","date_gmt":"2026-07-31T07:02:43","guid":{"rendered":"https:\/\/5speedtransmission.com\/?post_type=product&p=259"},"modified":"2026-07-31T07:02:43","modified_gmt":"2026-07-31T07:02:43","slug":"finished-bore-sprockets-asian-standard","status":"publish","type":"product","link":"https:\/\/5speedtransmission.com\/pt\/produto\/finished-bore-sprockets-asian-standard\/","title":{"rendered":"Rodas dentadas com furo acabado, padr\u00e3o asi\u00e1tico"},"content":{"rendered":"
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<\/p>\n

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25B \u2013 120B<\/p>\n

Faixa de tamanho da corrente<\/p>\n<\/div>\n

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FBN \/ FBK<\/p>\n

Tipo FBN (B) e FBK (B+F)<\/p>\n<\/div>\n

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JIS B1801<\/p>\n

Padr\u00e3o Asi\u00e1tico<\/p>\n<\/div>\n

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ISO 9001<\/p>\n

Qualidade Certificada<\/p>\n<\/div>\n<\/div>\n

<\/p>\n

Rodas dentadas com furo acabado padr\u00e3o asi\u00e1tico \u2013 Vis\u00e3o geral do produto<\/h2>\n
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A gama de furos acabados \u00e9 produzida em dois tipos de cubo: FBN (Tipo B)<\/strong> \u2014 um cubo reto com furo, chaveta e parafuso de fixa\u00e7\u00e3o, fornecido com a chaveta centrada na linha central do dente (e n\u00e3o entre os dentes, como em alguns outros padr\u00f5es). A disposi\u00e7\u00e3o da chaveta no centro do dente permite que a chaveta fique vis\u00edvel por cima quando a roda dentada est\u00e1 montada no eixo, facilitando as verifica\u00e7\u00f5es de alinhamento. FBK (Tipo B+F)<\/strong> \u2014 o mesmo cubo com uma flange adicional, usado para aplica\u00e7\u00f5es que exigem reten\u00e7\u00e3o lateral positiva ou fixa\u00e7\u00e3o a um ressalto do eixo.<\/p>\n

The range covers chain sizes 25B (3\/16″ pitch) through 120B (1\u00bd” pitch), in simplex. Material is C45 carbon steel with induction-hardened teeth for sizes 35B and above. For 25B light-duty chain, the sprocket is un-hardened plain C45. Stainless steel (SUS304) variants are available for 25B (food and pharmaceutical) \u2014 designated SUSFBP. For the Asian stock bore range (NK type) see our Engrenagens de di\u00e2metro padr\u00e3o asi\u00e1ticas<\/a>Navegue pelo categoria completa de rodas dentadas<\/a>.<\/p>\n

 <\/p>\n<\/div>\n

\"Rodas
\n<\/p>\n
\n

\ud83c\udf0f Asi\u00e1tico vs ANSI vs Europeu \u2014 mesmo campo, corrente diferente<\/p>\n

Para o mesmo passo (ex.: \u00bd\u2033 \/ 12,7 mm), os tr\u00eas padr\u00f5es t\u00eam di\u00e2metros de rolo diferentes:<\/p>\n\n\n\n\n\n\n
Passo \u00bd\u2033<\/th>\nRolo \u00d8<\/th>\nPadr\u00e3o<\/th>\n<\/tr>\n
40B (Asi\u00e1tico\/JIS)<\/td>\n7,92 mm<\/td>\nJIS B1801<\/td>\n<\/tr>\n
#40 (Americano)<\/td>\n7,95 mm<\/td>\nANSI B29.1<\/td>\n<\/tr>\n
08B (Europeu)<\/td>\n8,51 mm<\/td>\nDIN 8187<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u26a0\ufe0f N\u00e3o misture padr\u00f5es de corrente \u2014 o rolete DIN 08B maior n\u00e3o se encaixar\u00e1 corretamente em perfis de dentes asi\u00e1ticos ou ANSI.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

<\/p>\n

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Localiza\u00e7\u00e3o da chaveta \u2014 Diferen\u00e7a do padr\u00e3o asi\u00e1tico<\/h2>\n

As engrenagens padr\u00e3o asi\u00e1ticas t\u00eam a chaveta usinada na linha central do dente \u2014 alinhada com o ponto m\u00e9dio do dente, e n\u00e3o entre os dentes. Essa conven\u00e7\u00e3o difere das engrenagens europeias DIN 8187 e americanas ANSI B29.1, onde a chaveta geralmente fica posicionada entre os dentes. A diferen\u00e7a \u00e9 importante por dois motivos:<\/p>\n

\n
\n

\u2714 Confirma\u00e7\u00e3o visual da instala\u00e7\u00e3o<\/p>\n

Com a chaveta alinhada com o centro do dente, o engenheiro pode confirmar a posi\u00e7\u00e3o correta de instala\u00e7\u00e3o observando a parte superior da roda dentada instalada \u2014 o dente diretamente acima da chaveta deve estar centralizado sobre a marca da chaveta no eixo. Essa verifica\u00e7\u00e3o visual \u00e9 particularmente \u00fatil durante a instala\u00e7\u00e3o de rodas dentadas grandes, onde a medi\u00e7\u00e3o da posi\u00e7\u00e3o da roda dentada \u00e9 dif\u00edcil.<\/p>\n<\/div>\n

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\u26a0\ufe0f N\u00e3o substitua por engrenagem europeia\/ANSI<\/p>\n

Uma roda dentada europeia ou ANSI n\u00e3o pode ser usada como substituta de uma roda dentada padr\u00e3o asi\u00e1tica em uma corrente asi\u00e1tica, mesmo que o passo e o furo sejam os mesmos. O perfil do dente \u2014 raio da curva de assentamento, largura e \u00e2ngulo do dente \u2014 difere entre os padr\u00f5es. O uso de corrente e roda dentada incompat\u00edveis causa engate inadequado dos roletes, desgaste acelerado e falha prematura da roda dentada em poucas semanas ap\u00f3s a instala\u00e7\u00e3o.<\/p>\n<\/div>\n

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\ud83d\udcd0 Padr\u00e3o de chaveta JIS B1301<\/p>\n

As dimens\u00f5es da chaveta est\u00e3o em conformidade com a norma JIS B1301 (revisada em 1976) \u2014 a norma japonesa para chavetas e rasgos de chaveta paralelos em di\u00e2metros m\u00e9tricos. Esta norma \u00e9 dimensionalmente pr\u00f3xima da DIN 6885, mas utiliza propor\u00e7\u00f5es de profundidade ligeiramente diferentes para di\u00e2metros de furo pequenos (abaixo de 22 mm). Utilize sempre uma chaveta JIS B1301 ou DIN 6885 em rodas dentadas com padr\u00e3o asi\u00e1tico \u2014 n\u00e3o utilize chavetas ASME B17.1 em polegadas, que possuem rela\u00e7\u00f5es largura\/profundidade diferentes.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

<\/p>\n

\n

Chave:<\/strong> Z = dentes | De = di\u00e2metro da ponta (mm) | Dp = di\u00e2metro do c\u00edrculo primitivo (mm) | BD = op\u00e7\u00f5es de di\u00e2metro do furo (mm) | BL = comprimento do furo (mm) | a = largura da chaveta (mm) | FBN = cubo tipo B; FBK = tipo B com flange; SUSFBP = a\u00e7o inoxid\u00e1vel SUS304Especifica\u00e7\u00f5es da roda dentada com furo finalizado \u2014 35B a 100B<\/span><\/p>\n<\/div>\n

 <\/p>\n

35B | Passo 9,525 mm | Di\u00e2metro do rolo 5,08 mm | Largura interna 4,78 mm | Endurecido em C45<\/h3>\n
\n\n\n\n\n\n\n\n\n\n
Z<\/th>\nDe (mm)<\/th>\nDp (mm)<\/th>\nOp\u00e7\u00f5es BD (mm)<\/th>\nBL (mm)<\/th>\nrasgo de chaveta (mm)<\/th>\n<\/tr>\n<\/thead>\n
9<\/td>\n32<\/td>\n27.85<\/td>\n*21.5 (piloto)<\/td>\n20<\/td>\n6<\/td>\n<\/tr>\n
11<\/td>\n38<\/td>\n33.81<\/td>\n*27 (piloto)<\/td>\n20<\/td>\n6<\/td>\n<\/tr>\n
13<\/td>\n44<\/td>\n39.80<\/td>\n10, 12, 14, 15, 16<\/td>\n20<\/td>\n4\u20135<\/td>\n<\/tr>\n
17<\/td>\n56<\/td>\n51.83<\/td>\n10, 12, 14, 15, 16<\/td>\n20<\/td>\n5<\/td>\n<\/tr>\n
25<\/td>\n80<\/td>\n76.00<\/td>\n14, 15, 16<\/td>\n20<\/td>\n5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

40B | Passo 12,70 mm | Di\u00e2metro do rolo 7,92 mm | Largura interna 7,85 mm | Endurecido em C45<\/h3>\n
\n\n\n\n\n\n\n\n\n\n\n
Z<\/th>\nDe (mm)<\/th>\nDp (mm)<\/th>\nOp\u00e7\u00f5es BD (mm)<\/th>\nBL (mm)<\/th>\nrasgo de chaveta (mm)<\/th>\n<\/tr>\n<\/thead>\n
9<\/td>\n42<\/td>\n37.13<\/td>\n*28 (piloto)<\/td>\n22<\/td>\n5<\/td>\n<\/tr>\n
12<\/td>\n55<\/td>\n49.07<\/td>\n10, 12, 14, 15, 16, 17<\/td>\n22<\/td>\n5<\/td>\n<\/tr>\n
15<\/td>\n67<\/td>\n61.09<\/td>\n12, 14, 15, 16, 17, 18<\/td>\n22<\/td>\n5<\/td>\n<\/tr>\n
17<\/td>\n75<\/td>\n69.11<\/td>\n12, 14, 15, 16, 17, 18, 19, 20<\/td>\n22<\/td>\n5<\/td>\n<\/tr>\n
20<\/td>\n88<\/td>\n81.19<\/td>\n14, 15, 16, 17, 18, 19, 20<\/td>\n22<\/td>\n5<\/td>\n<\/tr>\n
25<\/td>\n108<\/td>\n101.33<\/td>\n14, 15, 17, 18, 19, 20<\/td>\n22<\/td>\n6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

60B | Passo 19,05 mm | Di\u00e2metro do rolo 11,91 mm | Largura interna 12,07 mm | Endurecido em C45<\/h3>\n
\n\n\n\n\n\n\n\n\n\n
Z<\/th>\nDe (mm)<\/th>\nDp (mm)<\/th>\nOp\u00e7\u00f5es BD (mm)<\/th>\nBL (mm)<\/th>\nrasgo de chaveta (mm)<\/th>\n<\/tr>\n<\/thead>\n
9<\/td>\n63<\/td>\n58.10<\/td>\n32<\/td>\n35<\/td>\n8<\/td>\n<\/tr>\n
11<\/td>\n76<\/td>\n71.56<\/td>\n30, 32, 35<\/td>\n35<\/td>\n8<\/td>\n<\/tr>\n
13<\/td>\n89<\/td>\n84.92<\/td>\n30, 32, 35, 38, 40<\/td>\n35<\/td>\n10<\/td>\n<\/tr>\n
17<\/td>\n114<\/td>\n109.97<\/td>\n32, 35, 38, 40, 42, 45<\/td>\n35<\/td>\n10<\/td>\n<\/tr>\n
21<\/td>\n139<\/td>\n135.64<\/td>\n35, 38, 40, 42, 45, 48<\/td>\n40<\/td>\n12<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

80B | Passo 25,40 mm | Di\u00e2metro do rolo 15,88 mm | Largura interna 15,88 mm | Endurecido em C45<\/h3>\n
\n\n\n\n\n\n\n\n\n
Z<\/th>\nDe (mm)<\/th>\nDp (mm)<\/th>\nOp\u00e7\u00f5es BD (mm)<\/th>\nBL (mm)<\/th>\nrasgo de chaveta (mm)<\/th>\n<\/tr>\n<\/thead>\n
9<\/td>\n84<\/td>\n77.52<\/td>\n44 (piloto)<\/td>\n42<\/td>\n12<\/td>\n<\/tr>\n
13<\/td>\n117<\/td>\n113.27<\/td>\n40, 42, 45, 48<\/td>\n42<\/td>\n12<\/td>\n<\/tr>\n
17<\/td>\n151<\/td>\n146.28<\/td>\n42, 45, 48, 50<\/td>\n42<\/td>\n14<\/td>\n<\/tr>\n
21<\/td>\n186<\/td>\n180.75<\/td>\n45, 48, 50, 55<\/td>\n50<\/td>\n14<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

* = furo piloto (sem chaveta). Gama completa de furos e variantes em a\u00e7o inoxid\u00e1vel SUSFBP25B dispon\u00edveis \u2014 entre em contato conosco. 50B, 100B e 120B tamb\u00e9m dispon\u00edveis. Ao fazer o pedido, especifique o tamanho da corrente, o n\u00famero de dentes, o tipo (FBN ou FBK) e o di\u00e2metro do furo em mm.<\/p>\n

<\/p>\n

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\"\"<\/p>\n

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Caracter\u00edsticas t\u00e9cnicas<\/h2>\n

\"Engrenagens<\/p>\n

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Perfil de dente JIS B1801<\/h3>\n

O perfil do dente est\u00e1 em conformidade com a norma JIS B1801 \u2014 requisito para o engate correto com correntes de rolos padr\u00e3o asi\u00e1tico. O raio da curva de assentamento e a largura do dente diferem das normas DIN 8187 e ANSI B29.1 porque o di\u00e2metro do rolo padr\u00e3o asi\u00e1tico \u00e9 ligeiramente diferente de ambas. O uso de corrente asi\u00e1tica em rodas dentadas europeias ou americanas (ou vice-versa) causa assentamento incorreto do rolo e desgaste prematuro, mesmo quando o passo \u00e9 id\u00eantico. Combine com Corrente de rolos padr\u00e3o asi\u00e1tico JIS B1801<\/a>.<\/p>\n<\/div>\n

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C45 com dentes endurecidos \u2014 35B e acima<\/h3>\n

Todas as rodas dentadas FBN e FBK, de 35B a 120B, s\u00e3o fabricadas em a\u00e7o carbono C45 com flancos dos dentes endurecidos por indu\u00e7\u00e3o a 52\u201358 HRC. O furo \u00e9 usinado antes do ciclo de tratamento t\u00e9rmico e as dimens\u00f5es s\u00e3o confirmadas ap\u00f3s o endurecimento. As rodas dentadas 25B s\u00e3o para aplica\u00e7\u00f5es mais leves \u2014 a\u00e7o carbono C45 sem endurecimento dos dentes, adequadas para cargas leves em aplica\u00e7\u00f5es de transmiss\u00e3o 25B. As variantes em a\u00e7o inoxid\u00e1vel SUS304 (prefixo SUSFBP) possuem apenas furo liso e n\u00e3o s\u00e3o endurecidas pelo material.<\/p>\n<\/div>\n

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Flange tipo FBK \u2014 Reten\u00e7\u00e3o lateral<\/h3>\n

O tipo FBK adiciona uma face flangeada ao cubo, proporcionando uma superf\u00edcie de apoio contra um ressalto ou colar do eixo. Isso \u00e9 necess\u00e1rio em aplica\u00e7\u00f5es onde a roda dentada deve ser mantida axialmente no eixo por sua pr\u00f3pria geometria, em vez de depender inteiramente do parafuso de fixa\u00e7\u00e3o. O FBK \u00e9 o tipo padr\u00e3o para transmiss\u00f5es por corrente em m\u00e1quinas agr\u00edcolas e equipamentos de movimenta\u00e7\u00e3o de materiais japoneses, onde a posi\u00e7\u00e3o da roda dentada \u00e9 determinada por um ressalto no eixo, e n\u00e3o apenas por um parafuso de fixa\u00e7\u00e3o.<\/p>\n<\/div>\n

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Korea Ever-Power para acionamentos de OEMs asi\u00e1ticos<\/h3>\n

As m\u00e1quinas industriais coreanas utilizam padr\u00f5es de corrente baseados na norma JIS para todas as transmiss\u00f5es nacionais. As rodas dentadas com furo acabado, padr\u00e3o asi\u00e1tico da Korea Ever-Power, s\u00e3o a substitui\u00e7\u00e3o ideal para transmiss\u00f5es em equipamentos fabricados na Coreia em todos os setores \u2014 m\u00e1quinas de constru\u00e7\u00e3o, equipamentos agr\u00edcolas, transportadores industriais e m\u00e1quinas t\u00eaxteis. Possuem a mesma geometria do cubo, di\u00e2metros de furo e dimens\u00f5es da chaveta que as especifica\u00e7\u00f5es originais do fabricante coreano.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

<\/p>\n

Correntes e produtos relacionados correspondentes<\/h2>\n
\n

\"Corrente<\/p>\n

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Corrente de rolos compat\u00edvel com o padr\u00e3o asi\u00e1tico<\/p>\n

Utilize sua roda dentada FBN\/FBK com uma corrente de rolos padr\u00e3o asi\u00e1tico JIS B1801 com a mesma numera\u00e7\u00e3o (35B, 40B, 60B, 80B etc.). Dispon\u00edveis nas vers\u00f5es padr\u00e3o, s\u00e9rie H, autolubrificante e em a\u00e7o inoxid\u00e1vel SUS304. Nunca utilize correntes europeias DIN 8187 ou ANSI B29.1 em rodas dentadas asi\u00e1ticas.<\/p>\n

Ver Correntes de Condu\u00e7\u00e3o \u2192<\/a><\/p>\n<\/div>\n<\/div>\n

\n
\n

\"Correntes<\/p>\n

Correntes de folhas<\/a><\/h3>\n

Correntes de l\u00e2minas das s\u00e9ries BL e LH para mastros de empilhadeiras, acionamentos de portas industriais e mecanismos de eleva\u00e7\u00e3o. Capacidades de tra\u00e7\u00e3o de 11 kN a mais de 1.600 kN.<\/p>\n

Ver Cadeias de Folhas<\/a><\/p>\n<\/div>\n

\n

\"Correntes<\/p>\n

Correntes de Engenharia<\/a><\/h3>\n

Correntes soldadas de a\u00e7o, ferro fundido e forjadas para transporte industrial pesado em sider\u00fargicas, f\u00e1bricas de cimento, minera\u00e7\u00e3o e processamento qu\u00edmico.<\/p>\n

Veja as correntes de engenharia<\/a><\/p>\n<\/div>\n

\n

\"Corrente<\/p>\n

Correntes de a\u00e7o inoxid\u00e1vel<\/a><\/h3>\n

Correntes de rolos em a\u00e7o inoxid\u00e1vel SUS304 e SUS316L para ambientes aliment\u00edcios, farmac\u00eauticos e qu\u00edmicos. Adequadas para lavagem frequente, altas temperaturas e meios corrosivos.<\/p>\n

Ver Correntes SS<\/a><\/p>\n<\/div>\n

\n

\"cadeia-agr\u00edcola-1\"<\/p>\n

Cadeias Agr\u00edcolas<\/a><\/h3>\n

S\u00e9ries CA, CC e de correntes para milho, para colheitadeiras, colhedoras de algod\u00e3o, enfardadeiras e equipamentos de distribui\u00e7\u00e3o. Norma ISO 487 \/ ASME B29.100.<\/p>\n

Veja as cadeias agr\u00edcolas<\/a><\/p>\n<\/div>\n<\/div>\n

<\/p>\n

\n

\"\"<\/p>\n

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Solicite um or\u00e7amento \u2014 Rodas dentadas com furo acabado padr\u00e3o asi\u00e1tico<\/h3>\n

Especifique o tamanho da corrente (ex.: 60B), n\u00famero de dentes, tipo (FBN ou FBK) e di\u00e2metro do furo em mm. Corrente SUSFBP em a\u00e7o inoxid\u00e1vel dispon\u00edvel para 25B. Resposta em at\u00e9 um dia \u00fatil.<\/p>\n

Solicite um or\u00e7amento agora<\/a>
\nTodos os produtos Sprocket<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

As rodas dentadas com furo acabado, padr\u00e3o asi\u00e1tico da Korea Ever-Power, est\u00e3o em conformidade com a norma JIS B1801 \u2014 a norma industrial japonesa para rodas dentadas de corrente de rolos, que serve de base para o padr\u00e3o asi\u00e1tico utilizado no Jap\u00e3o, Coreia do Sul, Taiwan, China e Sudeste Asi\u00e1tico. As dimens\u00f5es da corrente JIS diferem das normas ANSI B29.1 e DIN 8187 em rela\u00e7\u00e3o ao di\u00e2metro do rolo e \u00e0 largura interna, exigindo um perfil de dente espec\u00edfico \u2014 correntes e rodas dentadas padr\u00e3o asi\u00e1tico devem sempre ser compat\u00edveis com a mesma norma.<\/p>","protected":false},"featured_media":236,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"off","_et_pb_old_content":"

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25B \u2013 120B<\/p>\r\n

Chain Size Range<\/p>\r\n\r\n<\/div>\r\n

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FBN \/ FBK<\/p>\r\n

Type FBN (B) & FBK (B+F)<\/p>\r\n\r\n<\/div>\r\n

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JIS B1801<\/p>\r\n

Asian Standard<\/p>\r\n\r\n<\/div>\r\n

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ISO 9001<\/p>\r\n

Certified Quality<\/p>\r\n\r\n<\/div>\r\n<\/div>\r\n\r\n

Asian Standard Finished Bore Sprockets \u2013 Product Overview<\/h2>\r\n
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The finished bore range is produced in two hub types: FBN (Type B)<\/strong> \u2014 a straight hub with a bore, keyway and setscrew, supplied with the keyway centred on the tooth centreline (not between teeth as in some other standards). The keyway-on-tooth-centre arrangement allows the key to be visible from above when the sprocket is mounted on the shaft, making alignment checks easier. FBK (Type B+F)<\/strong> \u2014 the same hub with an additional flange, used for applications requiring positive lateral retention or attachment to a shaft shoulder.<\/p>\r\n

The range covers chain sizes 25B (3\/16\" pitch) through 120B (1\u00bd\" pitch), in simplex. Material is C45 carbon steel with induction-hardened teeth for sizes 35B and above. For 25B light-duty chain, the sprocket is un-hardened plain C45. Stainless steel (SUS304) variants are available for 25B (food and pharmaceutical) \u2014 designated SUSFBP. For the Asian stock bore range (NK type) see our Asian stock bore sprockets<\/a>. Browse the full sprocket category<\/a>.<\/p>\r\n\r\n<\/div>\r\n

\r\n\r\n\"Korea\r\n\r\n
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\ud83c\udf0f Asian vs ANSI vs European \u2014 same pitch, different chain<\/p>\r\n

For the same pitch (e.g. \u00bd\u2033 \/ 12.7 mm), the three standards have different roller diameters:<\/p>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Pitch \u00bd\u2033<\/th>\r\nRoller \u00d8<\/th>\r\nStandard<\/th>\r\n<\/tr>\r\n
40B (Asian\/JIS)<\/td>\r\n7.92 mm<\/td>\r\nJIS B1801<\/td>\r\n<\/tr>\r\n
#40 (American)<\/td>\r\n7.95 mm<\/td>\r\nANSI B29.1<\/td>\r\n<\/tr>\r\n
08B (European)<\/td>\r\n8.51 mm<\/td>\r\nDIN 8187<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n

\u26a0\ufe0f Do not mix chain standards \u2014 the larger DIN 08B roller will not seat correctly on Asian or ANSI tooth profiles.<\/p>\r\n\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n\r\n

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Keyway Location \u2014 Asian Standard Difference<\/h2>\r\n

Asian standard sprockets have the keyway machined on the tooth centreline \u2014 aligned with the midpoint of a tooth, not between teeth. This is a different convention from European DIN 8187 and American ANSI B29.1 sprockets, where the keyway is typically positioned between teeth. The difference matters for two reasons:<\/p>\r\n\r\n

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\u2714 Visual Installation Confirmation<\/p>\r\n

With the keyway on the tooth centreline, the engineer can confirm correct installation position by looking at the top of the installed sprocket \u2014 the tooth directly above the key should be centred over the keyway mark on the shaft. This visual check is particularly useful during installation of large sprockets where gauging the sprocket position is difficult.<\/p>\r\n\r\n<\/div>\r\n

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\u26a0\ufe0f Do Not Substitute European\/ANSI Sprocket<\/p>\r\n

A European or ANSI sprocket cannot be substituted for an Asian standard sprocket on Asian chain, even if the pitch and bore are the same. The tooth profile \u2014 seating curve radius, tooth width and tooth angle \u2014 differs between standards. Running mismatched chain and sprocket causes poor roller engagement, accelerated wear and premature sprocket failure within weeks of installation.<\/p>\r\n\r\n<\/div>\r\n

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\ud83d\udcd0 JIS B1301 Keyway Standard<\/p>\r\n

Keyway dimensions conform to JIS B1301 (revised 1976) \u2014 the Japanese standard for parallel keys and keyways in metric bore sizes. This is dimensionally close to DIN 6885 but uses slightly different depth proportions for small bore sizes (below 22 mm). Always use a JIS B1301 or DIN 6885 key in Asian standard sprockets \u2014 do not use ASME B17.1 inch keys, which have different width-to-depth ratios.<\/p>\r\n\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n\r\n

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Key:<\/strong> Z = teeth \u00a0|\u00a0 De = tip diameter (mm) \u00a0|\u00a0 Dp = pitch circle diameter (mm) \u00a0|\u00a0 BD = bore diameter options (mm) \u00a0|\u00a0 BL = bore length (mm) \u00a0|\u00a0 a = keyway width (mm) \u00a0|\u00a0 FBN = Type B hub; FBK = Type B with flange; SUSFBP = SUS304 stainlessFinished Bore Sprocket Specifications \u2014 35B through 100B<\/span><\/p>\r\n\r\n<\/div>\r\n

35B \u00a0|\u00a0 Pitch 9.525 mm \u00a0|\u00a0 Roller \u00d8 5.08 mm \u00a0|\u00a0 Inner width 4.78 mm \u00a0|\u00a0 C45 hardened<\/h3>\r\n
\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Z<\/th>\r\nDe (mm)<\/th>\r\nDp (mm)<\/th>\r\nBD options (mm)<\/th>\r\nBL (mm)<\/th>\r\na keyway (mm)<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
9<\/td>\r\n32<\/td>\r\n27.85<\/td>\r\n*21.5 (pilot)<\/td>\r\n20<\/td>\r\n6<\/td>\r\n<\/tr>\r\n
11<\/td>\r\n38<\/td>\r\n33.81<\/td>\r\n*27 (pilot)<\/td>\r\n20<\/td>\r\n6<\/td>\r\n<\/tr>\r\n
13<\/td>\r\n44<\/td>\r\n39.80<\/td>\r\n10, 12, 14, 15, 16<\/td>\r\n20<\/td>\r\n4\u20135<\/td>\r\n<\/tr>\r\n
17<\/td>\r\n56<\/td>\r\n51.83<\/td>\r\n10, 12, 14, 15, 16<\/td>\r\n20<\/td>\r\n5<\/td>\r\n<\/tr>\r\n
25<\/td>\r\n80<\/td>\r\n76.00<\/td>\r\n14, 15, 16<\/td>\r\n20<\/td>\r\n5<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/div>\r\n

40B \u00a0|\u00a0 Pitch 12.70 mm \u00a0|\u00a0 Roller \u00d8 7.92 mm \u00a0|\u00a0 Inner width 7.85 mm \u00a0|\u00a0 C45 hardened<\/h3>\r\n
\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Z<\/th>\r\nDe (mm)<\/th>\r\nDp (mm)<\/th>\r\nBD options (mm)<\/th>\r\nBL (mm)<\/th>\r\na keyway (mm)<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
9<\/td>\r\n42<\/td>\r\n37.13<\/td>\r\n*28 (pilot)<\/td>\r\n22<\/td>\r\n5<\/td>\r\n<\/tr>\r\n
12<\/td>\r\n55<\/td>\r\n49.07<\/td>\r\n10, 12, 14, 15, 16, 17<\/td>\r\n22<\/td>\r\n5<\/td>\r\n<\/tr>\r\n
15<\/td>\r\n67<\/td>\r\n61.09<\/td>\r\n12, 14, 15, 16, 17, 18<\/td>\r\n22<\/td>\r\n5<\/td>\r\n<\/tr>\r\n
17<\/td>\r\n75<\/td>\r\n69.11<\/td>\r\n12, 14, 15, 16, 17, 18, 19, 20<\/td>\r\n22<\/td>\r\n5<\/td>\r\n<\/tr>\r\n
20<\/td>\r\n88<\/td>\r\n81.19<\/td>\r\n14, 15, 16, 17, 18, 19, 20<\/td>\r\n22<\/td>\r\n5<\/td>\r\n<\/tr>\r\n
25<\/td>\r\n108<\/td>\r\n101.33<\/td>\r\n14, 15, 17, 18, 19, 20<\/td>\r\n22<\/td>\r\n6<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/div>\r\n

60B \u00a0|\u00a0 Pitch 19.05 mm \u00a0|\u00a0 Roller \u00d8 11.91 mm \u00a0|\u00a0 Inner width 12.07 mm \u00a0|\u00a0 C45 hardened<\/h3>\r\n
\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Z<\/th>\r\nDe (mm)<\/th>\r\nDp (mm)<\/th>\r\nBD options (mm)<\/th>\r\nBL (mm)<\/th>\r\na keyway (mm)<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
9<\/td>\r\n63<\/td>\r\n58.10<\/td>\r\n32<\/td>\r\n35<\/td>\r\n8<\/td>\r\n<\/tr>\r\n
11<\/td>\r\n76<\/td>\r\n71.56<\/td>\r\n30, 32, 35<\/td>\r\n35<\/td>\r\n8<\/td>\r\n<\/tr>\r\n
13<\/td>\r\n89<\/td>\r\n84.92<\/td>\r\n30, 32, 35, 38, 40<\/td>\r\n35<\/td>\r\n10<\/td>\r\n<\/tr>\r\n
17<\/td>\r\n114<\/td>\r\n109.97<\/td>\r\n32, 35, 38, 40, 42, 45<\/td>\r\n35<\/td>\r\n10<\/td>\r\n<\/tr>\r\n
21<\/td>\r\n139<\/td>\r\n135.64<\/td>\r\n35, 38, 40, 42, 45, 48<\/td>\r\n40<\/td>\r\n12<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/div>\r\n

80B \u00a0|\u00a0 Pitch 25.40 mm \u00a0|\u00a0 Roller \u00d8 15.88 mm \u00a0|\u00a0 Inner width 15.88 mm \u00a0|\u00a0 C45 hardened<\/h3>\r\n
\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Z<\/th>\r\nDe (mm)<\/th>\r\nDp (mm)<\/th>\r\nBD options (mm)<\/th>\r\nBL (mm)<\/th>\r\na keyway (mm)<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
9<\/td>\r\n84<\/td>\r\n77.52<\/td>\r\n44 (pilot)<\/td>\r\n42<\/td>\r\n12<\/td>\r\n<\/tr>\r\n
13<\/td>\r\n117<\/td>\r\n113.27<\/td>\r\n40, 42, 45, 48<\/td>\r\n42<\/td>\r\n12<\/td>\r\n<\/tr>\r\n
17<\/td>\r\n151<\/td>\r\n146.28<\/td>\r\n42, 45, 48, 50<\/td>\r\n42<\/td>\r\n14<\/td>\r\n<\/tr>\r\n
21<\/td>\r\n186<\/td>\r\n180.75<\/td>\r\n45, 48, 50, 55<\/td>\r\n50<\/td>\r\n14<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/div>\r\n

* = pilot bore (no keyway). Full bore range and stainless SUSFBP25B variants available \u2014 contact us. 50B, 100B and 120B also available. Specify chain size, tooth count, type (FBN or FBK) and bore diameter mm when ordering.<\/p>\r\n\r\n

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Technical Features<\/h2>\r\n\"Finished-Bore-Sprockets-1\"\r\n
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JIS B1801 Tooth Profile<\/h3>\r\n

The tooth profile conforms to JIS B1801 \u2014 required for correct engagement with Asian standard roller chain. The seating curve radius and tooth width differ from DIN 8187 and ANSI B29.1 because the Asian standard roller diameter is slightly different from both. Running Asian chain on European or American sprockets (or vice versa) causes incorrect roller seating and premature wear even where the pitch is identical. Pair with JIS B1801 Asian standard roller chain<\/a>.<\/p>\r\n\r\n<\/div>\r\n

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C45 with Hardened Teeth \u2014 35B and Above<\/h3>\r\n

All FBN and FBK sprockets in 35B through 120B are C45 carbon steel with induction-hardened tooth flanks at 52\u201358 HRC. The bore is machined before the heat treatment cycle and confirmed dimensionally after hardening. 25B sprockets are lighter duty \u2014 plain C45 without tooth hardening, suitable for the light loads in 25B drive applications. SUS304 stainless variants (SUSFBP prefix) are plain bore only and are unhardened by material.<\/p>\r\n\r\n<\/div>\r\n

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FBK Flange Type \u2014 Lateral Retention<\/h3>\r\n

The FBK type adds a flange face to the hub, providing a bearing face against a shaft shoulder or collar. This is required in applications where the sprocket must be retained axially on the shaft by its own geometry rather than relying entirely on the setscrew. FBK is the standard type for chain drives in Japanese agricultural machinery and material handling equipment where the sprocket position is located by a shaft step rather than by a setscrew alone.<\/p>\r\n\r\n<\/div>\r\n

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Korea Ever-Power for Asian OEM Drives<\/h3>\r\n

Korean industrial machinery uses JIS-based chain standards for all domestic drives. Korea Ever-Power Asian standard finished bore sprockets are the correct replacement for drives in Korean-manufactured equipment across all sectors \u2014 construction machinery, agricultural equipment, industrial conveyors and textile machinery. The same hub geometry, bore sizes and keyway dimensions as the original Korean OEM specification.<\/p>\r\n\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n\r\n

Matching Chain & Related Products<\/h2>\r\n
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Matching Asian Standard Roller Chain<\/p>\r\n

Match your FBN\/FBK sprocket with JIS B1801 Asian standard roller chain in the same chain number (35B, 40B, 60B, 80B etc.). Standard, H-series, self-lubricating and SUS304 stainless variants available. Never run European DIN 8187 or ANSI B29.1 chain on Asian sprockets.<\/p>\r\nView Driving Chains \u2192<\/a>\r\n\r\n<\/div>\r\n<\/div>\r\n

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Leaf Chains<\/a><\/h3>\r\n

BL and LH series leaf chains for forklift masts, industrial door drives, and hoist mechanisms. Tensile ratings from 11 kN to over 1,600 kN.<\/p>\r\nView Leaf Chains<\/a>\r\n\r\n<\/div>\r\n

\r\n\r\n\"Korea\r\n

Engineering Chains<\/a><\/h3>\r\n

Welded steel, cast iron, and forged chains for heavy-duty industrial conveying in steel mills, cement plants, mining, and chemical processing.<\/p>\r\nView Engineering Chains<\/a>\r\n\r\n<\/div>\r\n

\r\n\r\n\"Korea\r\n

Stainless Steel Chains<\/a><\/h3>\r\n

SUS304 and SUS316L roller chains for food, pharmaceutical, and chemical environments. Suitable for washdown, elevated temperature, and corrosive media.<\/p>\r\nView SS Chains<\/a>\r\n\r\n<\/div>\r\n

\r\n\r\n\"agricultural-chain-1\"\r\n

Agricultural Chains<\/a><\/h3>\r\n

CA, CC, and corn-chain series for combine harvesters, cotton pickers, balers, and spreading equipment. ISO 487 \/ ASME B29.100 standard.<\/p>\r\nView Agricultural Chains<\/a>\r\n\r\n<\/div>\r\n<\/div>\r\n\r\n

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Request a Quote \u2014 Asian Standard Finished Bore Sprockets<\/h3>\r\n

Specify chain size (e.g. 60B), tooth count, type (FBN or FBK), bore diameter in mm. Stainless SUSFBP available for 25B. Response within one working day.<\/p>\r\n\r\n

Get a Quote Now<\/a>\r\nAll Sprocket Products<\/a><\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>","_et_gb_content_width":""},"product_brand":[],"product_cat":[24],"product_tag":[],"class_list":["post-259","product","type-product","status-publish","has-post-thumbnail","product_cat-sprockets","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/5speedtransmission.com\/pt\/wp-json\/wp\/v2\/product\/259","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/5speedtransmission.com\/pt\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/5speedtransmission.com\/pt\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/5speedtransmission.com\/pt\/wp-json\/wp\/v2\/comments?post=259"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/5speedtransmission.com\/pt\/wp-json\/wp\/v2\/media\/236"}],"wp:attachment":[{"href":"https:\/\/5speedtransmission.com\/pt\/wp-json\/wp\/v2\/media?parent=259"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/5speedtransmission.com\/pt\/wp-json\/wp\/v2\/product_brand?post=259"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/5speedtransmission.com\/pt\/wp-json\/wp\/v2\/product_cat?post=259"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/5speedtransmission.com\/pt\/wp-json\/wp\/v2\/product_tag?post=259"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}