{"id":248,"date":"2026-07-31T05:49:43","date_gmt":"2026-07-31T05:49:43","guid":{"rendered":"https:\/\/5speedtransmission.com\/?post_type=product&p=248"},"modified":"2026-07-31T06:17:24","modified_gmt":"2026-07-31T06:17:24","slug":"steel-stock-bore-sprockets-american-standard","status":"publish","type":"product","link":"https:\/\/5speedtransmission.com\/ja\/product\/steel-stock-bore-sprockets-american-standard\/","title":{"rendered":"Steel Stock Bore Sprockets American Standard"},"content":{"rendered":"
\n

<\/p>\n

\n
\n

#25 \u2013 #240<\/p>\n

\u30c1\u30a7\u30fc\u30f3\u30b5\u30a4\u30ba\u7bc4\u56f2<\/p>\n<\/div>\n

\n

Z=9 \u2013 120<\/p>\n

\u6b6f\u306e\u672c\u6570\u7bc4\u56f2<\/p>\n<\/div>\n

\n

ANSI B29.1<\/p>\n

\u6a19\u6e96<\/p>\n<\/div>\n

\n

ISO 9001<\/p>\n

\u8a8d\u8a3c\u54c1\u8cea<\/p>\n<\/div>\n<\/div>\n

<\/p>\n

American Standard Steel Stock Bore Sprockets \u2013 Product Overview<\/h2>\n
\n
\n

Stock bore sprockets are supplied with an unfinished bore \u2014 a pilot bore drilled for reference, with the hub left full so the bore can be machined to any shaft diameter from the minimum pilot bore up to the maximum bore for that hub size. The keyway and setscrew are machined to your specification at the time of boring. This makes stock bore the most flexible option for non-standard shaft sizes, metric or inch shaft diameters, and applications requiring tolerances or keyway forms outside the standard finished bore range.<\/p>\n

Material is C45 medium carbon steel. Tooth flanks are induction-hardened to 52\u201358 HRC while the hub bore area remains unhardened and machinable. All sprockets are phosphate-treated for corrosion protection during storage and early service. The most commonly ordered sizes \u2014 #40, #50, #60 and #80 in Z=12 through Z=60 \u2014 are held in stock for immediate despatch. For non-stocked sizes, lead time is 7\u201314 working days. Pair with standard roller drive chain<\/a>\u00a0for a complete matched drive.<\/p>\n<\/div>\n

\n
\n

\"\u30b9\u30c6\u30f3\u30ec\u30b9\u88fd\u30b9\u30d7\u30ed\u30b1\u30c3\u30c8-1\"\ud83d\udcd0 ANSI vs European \u2014 key difference<\/p>\n

ANSI chain and DIN 8187 chain have the same pitch for many sizes but different roller diameters and inner widths. An ANSI sprocket will not run correctly with European chain and vice versa<\/strong> \u2014 even where the pitch matches. Always confirm which chain standard is in use before ordering.<\/p>\n\n\n\n\n\n
Chain<\/th>\n\u6a19\u6e96<\/th>\nRegion<\/th>\n<\/tr>\n
#40 \/ #50 \/ #60<\/td>\nANSI B29.1<\/td>\nAmericas, Korea<\/td>\n<\/tr>\n
06B \/ 08B \/ 10B<\/td>\nDIN 8187<\/td>\nEurope<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n

<\/p>\n

\n

How to Read an ANSI Chain Number<\/h2>\n

The ANSI chain number is not arbitrary \u2014 it encodes the pitch and configuration of the chain. Understanding it lets you confirm the sprocket specification from the chain number stamped on the chain link plate.<\/p>\n

\n
\n

#4<\/span>0<\/span><\/p>\n

4<\/span> = pitch in eighths of an inch
\n4 \u00f7 8 = \u00bd\u2033 = 12.70 mm pitch<\/strong>
\n0<\/span> = standard (rollerized)<\/p>\n<\/div>\n

\n

#6<\/span>0<\/span><\/p>\n

6<\/span> = pitch in eighths
\n6 \u00f7 8 = \u00be\u2033 = 19.05 mm pitch<\/strong>
\n0<\/span> = standard rollerized<\/p>\n<\/div>\n

\n

#4<\/span>1<\/span><\/p>\n

4<\/span> = \u00bd\u2033 pitch
\n1<\/span> = lightweight (reduced roller)
\n#41 = light-duty \u00bd\u2033<\/strong><\/p>\n<\/div>\n

\n

#8<\/span>0<\/span>-2<\/span><\/p>\n

8<\/span> = 1\u2033 pitch
\n-2<\/span> = duplex (two strands)
\n1\u2033 pitch duplex chain<\/strong><\/p>\n<\/div>\n<\/div>\n

Suffix -2 = duplex, -3 = triplex. No suffix = simplex. #25 and #35 are light-duty sizes with smaller rollers relative to pitch. Always match the chain number exactly when ordering sprockets \u2014 the suffix matters.<\/p>\n<\/div>\n

<\/p>\n

\n

\u5217\u30ad\u30fc:<\/strong> Chain = ANSI chain number \u00a0|\u00a0 Pitch = chain pitch (in \/ mm) \u00a0|\u00a0 Roller \u00d8 = roller diameter (mm) \u00a0|\u00a0 Z range = available tooth counts \u00a0|\u00a0 de max = tip diameter at max Z \u00a0|\u00a0 Bore max = maximum bore at hub (mm) \u00a0|\u00a0 Available: S=simplex, D=duplex, T=triplex<\/p>\n<\/div>\n

ANSI Sprocket Specifications by Chain Size<\/h2>\n

\"Steel-Stock-Bore-Sprockets-dimension-1\"<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Chain<\/th>\nPitch (in \/ mm)<\/th>\nRoller \u00d8 (mm)<\/th>\n\u5185\u5e45\uff08mm\uff09<\/th>\nZ Range<\/th>\nde max (mm)<\/th>\nBore max (mm)<\/th>\nAvailable<\/th>\n<\/tr>\n<\/thead>\n
#25<\/td>\n\u00bc\u2033 \/ 6.35<\/td>\n3.30<\/td>\n3.18<\/td>\n9 \u2013 120<\/td>\n243.1<\/td>\n25<\/td>\nS<\/td>\n<\/tr>\n
#35<\/td>\n\u215c\u2033 \/ 9.525<\/td>\n5.08<\/td>\n4.78<\/td>\n6 \u2013 90<\/td>\n273.9<\/td>\n32<\/td>\nS, D<\/td>\n<\/tr>\n
#40<\/td>\n\u00bd\u2033 \/ 12.70<\/td>\n7.95<\/td>\n7.85<\/td>\n9 \u2013 90<\/td>\n363.5<\/td>\n50<\/td>\nS, D, T<\/td>\n<\/tr>\n
#50<\/td>\n\u215d\u2033 \/ 15.875<\/td>\n10.16<\/td>\n9.53<\/td>\n9 \u2013 90<\/td>\n454.5<\/td>\n60<\/td>\nS, D, T<\/td>\n<\/tr>\n
#60<\/td>\n\u00be\u2033 \/ 19.05<\/td>\n11.91<\/td>\n12.70<\/td>\n9 \u2013 90<\/td>\n545.3<\/td>\n75<\/td>\nS, D, T<\/td>\n<\/tr>\n
#80<\/td>\n1\u2033 \/ 25.40<\/td>\n15.88<\/td>\n15.88<\/td>\n9 \u2013 90<\/td>\n727.0<\/td>\n90<\/td>\nS, D, T<\/td>\n<\/tr>\n
#100<\/td>\n1\u00bc\u2033 \/ 31.75<\/td>\n19.05<\/td>\n19.05<\/td>\n9 \u2013 76<\/td>\n770.0<\/td>\n100<\/td>\nS, D, T<\/td>\n<\/tr>\n
#120<\/td>\n1\u00bd\u2033 \/ 38.10<\/td>\n22.23<\/td>\n25.40<\/td>\n9 \u2013 76<\/td>\n927.0<\/td>\n110<\/td>\nS, D, T<\/td>\n<\/tr>\n
#140<\/td>\n1\u00be\u2033 \/ 44.45<\/td>\n25.40<\/td>\n25.40<\/td>\n9 \u2013 57<\/td>\n812.0<\/td>\n115<\/td>\nS, D<\/td>\n<\/tr>\n
#160<\/td>\n2\u2033 \/ 50.80<\/td>\n28.58<\/td>\n31.75<\/td>\n8 \u2013 57<\/td>\n930.0<\/td>\n125<\/td>\nS, D<\/td>\n<\/tr>\n
#200<\/td>\n2\u00bd\u2033 \/ 63.50<\/td>\n39.67<\/td>\n38.10<\/td>\n8 \u2013 45<\/td>\n916.0<\/td>\n140<\/td>\nS, D<\/td>\n<\/tr>\n
#240<\/td>\n3\u2033 \/ 76.20<\/td>\n47.63<\/td>\n50.80<\/td>\n8 \u2013 38<\/td>\n928.0<\/td>\n160<\/td>\nS, D<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Common stock sizes (#40\u2013#80, Z=12\u201360) available for immediate despatch. All other sizes 7\u201314 working days. S=Simplex, D=Duplex, T=Triplex. Contact us with chain number, tooth count, strand and required bore diameter to confirm availability and lead time.<\/p>\n

<\/p>\n

\n

ANSI vs DIN 8187 \u2014 Technical Differences that Matter<\/h2>\n

Many engineers assume ANSI and European chain are interchangeable where pitches match \u2014 they are not. The differences in roller diameter and inner width mean the tooth profile must be different to achieve correct roller seating. Mixing standards causes premature wear and potential chain jump.<\/p>\n

\n\n\n\n\n\n\n\n\n
Dimension<\/th>\nANSI #40 (\u00bd\u2033)<\/th>\nDIN 8187 08B-1 (\u00bd\u2033)<\/th>\nImpact on sprocket<\/th>\n<\/tr>\n<\/thead>\n
\u30d4\u30c3\u30c1<\/td>\n12.70 mm<\/td>\n12.70 mm<\/td>\nIdentical \u2014 pitch circle diameter is the same for a given Z<\/td>\n<\/tr>\n
Roller diameter<\/td>\n7.95 mm<\/td>\n8.51 mm<\/td>\nLarger DIN roller won’t seat correctly in ANSI tooth profile \u2014 sits too high<\/td>\n<\/tr>\n
Inner width<\/td>\n7.85 mm<\/td>\n7.75 mm<\/td>\nDifferent tooth width machined \u2014 chain doesn’t seat correctly if wrong standard<\/td>\n<\/tr>\n
Tooth profile<\/td>\nANSI B29.1<\/td>\nDIN 8187<\/td>\nNot interchangeable<\/strong> \u2014 always match sprocket standard to chain standard<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

<\/p>\n

\n

\"\"<\/p>\n

\n

\u6280\u8853\u7684\u7279\u5fb4<\/h2>\n

\"Korea<\/p>\n

\n
\n

ANSI B29.1 Tooth Profile \u2014 Full Compliance<\/h3>\n

The tooth form is machined to the ANSI B29.1 involute profile, including the correct seating curve radius, tip relief and tooth width for the respective chain number. Every size undergoes dimensional inspection against the ANSI standard before despatch. Sprockets bearing the ANSI B29.1 designation can be run with any compliant chain from any manufacturer without adjustment.<\/p>\n<\/div>\n

\n

Inch and Metric Shaft Bore Available<\/h3>\n

American machinery uses inch shafts as standard \u2014 \u00bd”, \u215d”, \u00be”, 1″, 1\u00bc”, 1\u00bd” and so on. Korean machinery frequently uses metric shafts \u2014 15 mm, 20 mm, 25 mm, 30 mm. Korea Ever-Power bores stock bore sprockets to either inch or metric shaft diameters on request. Specify the shaft diameter in the exact form required (e.g. “1-\u00bc” or “32 mm”) when ordering to avoid conversion errors.<\/p>\n<\/div>\n

\n

C45 Steel \u2014 Induction-Hardened Teeth<\/h3>\n

The same material specification as our European standard range: C45 medium carbon steel, hub left soft and machinable, tooth flanks induction-hardened to 52\u201358 HRC. The hardening depth penetrates at least 1.5 mm below the tooth surface, ensuring the hardened layer outlasts the useable tooth profile before the soft substrate is reached. Phosphate-treated surface for corrosion protection.<\/p>\n<\/div>\n

\n

Matching ANSI Roller Chain<\/h3>\n

Every ANSI sprocket in this range should be paired with the correct American standard roller chain \u2014 the chain number must match the sprocket’s chain number exactly. Pair #40, #50, #60 or #80 ANSI roller chain<\/a> with the corresponding sprocket. Do not pair with DIN 8187 European chain of the same pitch \u2014 the tooth profiles are incompatible despite the equal pitch.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

<\/p>\n

\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3<\/h2>\n
\n
\n

North American Industrial Machinery<\/h3>\n

The Americas standard for industrial machinery chain drives is ANSI B29.1. Any equipment designed or manufactured in the USA, Canada, Mexico, Colombia or Brazil will use ANSI chain. #40 and #50 are the most common sizes in light and medium industrial conveyors; #60 and #80 cover the majority of heavy industrial and agricultural OEM drives in North America. Stock bore is the standard MRO specification for replacement drives.<\/p>\n<\/div>\n

\n

Korean-Manufactured Equipment<\/h3>\n

Korea uses ANSI B29.1 as its domestic chain standard \u2014 Korean industrial machinery from manufacturers including Doosan, Hyundai Heavy Industries and agricultural OEMs all specify ANSI chain. This is why Korea Ever-Power stocks the full ANSI sprocket range alongside the European range. Replacement sprockets for Korean equipment imported into Europe or Australia must be ordered to ANSI specification, not DIN 8187, even though the pitch may appear identical.<\/p>\n<\/div>\n

\n

Export Machinery for Americas Markets<\/h3>\n

European and Asian OEMs designing machinery for North American or South American markets must specify ANSI chain and sprockets to ensure local service parts availability. #50 and #60 ANSI sprockets are stocked by virtually every industrial supply house in the USA, Canada and Brazil \u2014 replacing a DIN 8187 sprocket in an American workshop requires a specialist import order. Our \u30b9\u30d7\u30ed\u30b1\u30c3\u30c8\u306e\u5168\u7bc4\u56f2<\/a> covers both standards for export machine builders.<\/p>\n<\/div>\n<\/div>\n

\"chain-sprocket-1\"<\/p>\n

\u30de\u30c3\u30c1\u30f3\u30b0\u30c1\u30a7\u30fc\u30f3\u304a\u3088\u3073\u95a2\u9023\u88fd\u54c1<\/h2>\n
\n

\"American<\/p>\n

\n

Matching ANSI Roller Chain<\/p>\n

Pair your ANSI sprocket with American standard roller chain in the same chain number \u2014 #40, #50, #60 or #80 simplex, duplex or triplex. Standard, heavy H-series and self-lubricating variants available in ANSI B29.1 specification for all sizes in this range.<\/p>\n

View Sprocket and Chains \u2192<\/a><\/p>\n<\/div>\n<\/div>\n

\n
\n

\"Korea<\/p>\n

\u8449\u306e\u9396<\/a><\/h3>\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>\n

\u8449\u306e\u9023\u9396\u3092\u898b\u308b<\/a><\/p>\n<\/div>\n

\n

\"Korea<\/p>\n

\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u30c1\u30a7\u30fc\u30f3<\/a><\/h3>\n

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

\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u30c1\u30a7\u30fc\u30f3\u3092\u898b\u308b<\/a><\/p>\n<\/div>\n

\n

\"Korea<\/p>\n

\u30b9\u30c6\u30f3\u30ec\u30b9\u30b9\u30c1\u30fc\u30eb\u30c1\u30a7\u30fc\u30f3<\/a><\/h3>\n

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

SS\u30c1\u30a7\u30fc\u30f3\u3092\u898b\u308b<\/a><\/p>\n<\/div>\n

\n

\"\u8fb2\u696d\u30b5\u30d7\u30e9\u30a4\u30c1\u30a7\u30fc\u30f31\"<\/p>\n

\u8fb2\u696d\u30b5\u30d7\u30e9\u30a4\u30c1\u30a7\u30fc\u30f3<\/a><\/h3>\n

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

\u8fb2\u696d\u30b5\u30d7\u30e9\u30a4\u30c1\u30a7\u30fc\u30f3\u3092\u898b\u308b<\/a><\/p>\n<\/div>\n<\/div>\n

<\/p>\n

\u3088\u304f\u3042\u308b\u8cea\u554f<\/h2>\n
\n
\nMy equipment was made in Korea \u2014 should I order ANSI or European sprockets?<\/summary>\n
Korea uses ANSI B29.1 as its domestic standard \u2014 Korean-manufactured equipment uses ANSI chain and ANSI sprockets. The chain number stamped on the chain link plate will be in ANSI format: #40, #50, #60, #80 and so on. Order ANSI sprockets in the corresponding number. If the chain number uses a different format (e.g. 08B, 10B, 12B) the equipment uses European DIN 8187 chain \u2014 order European sprockets. If you are unsure, measure the roller diameter of your existing chain and compare against the ANSI and DIN tables above \u2014 the roller diameter is the most reliable way to distinguish the two standards when the pitch is the same.<\/div>\n<\/details>\n
\nWhat is the difference between #40 and #41 chain and sprockets?<\/summary>\n
#40 is the standard \u00bd\u2033 pitch ANSI roller chain with full-diameter rollers (7.95 mm). #41 is a lightweight variant with the same \u00bd\u2033 pitch but a smaller roller diameter and narrower inner width \u2014 it is a lighter, lower-cost chain for applications where the load capacity of #40 is not required. #40 and #41 sprockets are NOT interchangeable \u2014 a #41 chain will not seat correctly on a #40 sprocket because the seating curve is machined for the #40 roller diameter. Always match the full chain number including the digit suffix. #41 is primarily used in light conveyors, vending machines and light domestic applications.<\/div>\n<\/details>\n
\nCan I bore the sprocket to an inch shaft size on a metric specification?<\/summary>\n
Yes \u2014 we bore and keyway stock bore sprockets to any shaft specification, inch or metric, up to the maximum bore for that hub. The keyway is machined to the appropriate standard for the shaft: ANSI\/ASME B17.1 key dimensions for inch shafts, ISO\/DIN 6885 for metric shafts. Specify the shaft diameter exactly \u2014 “1 inch” and “25 mm” are close but not the same (25.4 mm vs 25.0 mm); the bore tolerance must be correct for the actual shaft diameter. For inch shafts with a keyway, specify the key width and depth or state the shaft diameter and we will apply the standard ASME B17.1 key size for that shaft diameter.<\/div>\n<\/details>\n
\nAre #100, #120 and larger sizes held in stock?<\/summary>\n
#100 and #120 are stocked in the most common tooth counts (Z=11, 13, 15, 17, 19, 21, 25) for immediate despatch. #140 and #160 are semi-stocked \u2014 most sizes available within 7 working days. #200 and #240 are made-to-order \u2014 lead time 14\u201321 working days depending on tooth count and strand configuration. For all large-chain-number sizes above #100, contact us to confirm current stock availability and lead time before placing an order. Bore machining is done at the time of order for all sizes.<\/div>\n<\/details>\n
\"ever-power-service-1\"<\/div>\n<\/div>\n

<\/p>\n

\n

\"\"<\/p>\n

\n

Request a Quote for American Standard Sprockets<\/h3>\n

Specify ANSI chain number (e.g. #60), tooth count, strand (simplex\/duplex\/triplex), shaft diameter in inches or mm, and keyway requirement. Response within one working day.<\/p>\n

\u4eca\u3059\u3050\u898b\u7a4d\u3082\u308a\u3092\u4f9d\u983c\u3059\u308b<\/a>
\n\u3059\u3079\u3066\u306e\u30b9\u30d7\u30ed\u30b1\u30c3\u30c8\u88fd\u54c1<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

Korea Ever-Power American standard stock bore sprockets cover the full ANSI B29.1 chain range from #25 (6.35 mm pitch, 1\/4″) through #240 (76.2 mm pitch, 3″), in simplex, duplex and triplex configurations. The tooth profile is machined to the ANSI B29.1 involute form \u2014 compatible with any roller chain manufactured to American ANSI standards, including chains from U.S., Canadian, Mexican and South Korean manufacturers.<\/p>","protected":false},"featured_media":241,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[24],"product_tag":[],"class_list":["post-248","product","type-product","status-publish","has-post-thumbnail","product_cat-sprockets","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/5speedtransmission.com\/ja\/wp-json\/wp\/v2\/product\/248","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/5speedtransmission.com\/ja\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/5speedtransmission.com\/ja\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/5speedtransmission.com\/ja\/wp-json\/wp\/v2\/comments?post=248"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/5speedtransmission.com\/ja\/wp-json\/wp\/v2\/media\/241"}],"wp:attachment":[{"href":"https:\/\/5speedtransmission.com\/ja\/wp-json\/wp\/v2\/media?parent=248"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/5speedtransmission.com\/ja\/wp-json\/wp\/v2\/product_brand?post=248"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/5speedtransmission.com\/ja\/wp-json\/wp\/v2\/product_cat?post=248"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/5speedtransmission.com\/ja\/wp-json\/wp\/v2\/product_tag?post=248"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}