{"id":758,"date":"2026-05-26T06:17:38","date_gmt":"2026-05-26T06:17:38","guid":{"rendered":"https:\/\/automatictransmissionpart.com\/?post_type=product&p=758"},"modified":"2026-05-26T06:17:38","modified_gmt":"2026-05-26T06:17:38","slug":"ep20b-1-european-finished-bore-sprockets-11-4x3-4","status":"publish","type":"product","link":"https:\/\/automatictransmissionpart.com\/zh\/product\/ep20b-1-european-finished-bore-sprockets-11-4x3-4\/","title":{"rendered":"EP20B-1 \u6b27\u6d32\u6807\u51c6\u5b54\u5f84\u94fe\u8f6e 1\u20331\/4\u00d73\/4\u201d"},"content":{"rendered":"
\n

EP20B-1 European Finished Bore Sprockets | Best European Sprockets Series 1″1\/4\u00d73\/4” Power Transmission<\/h2>\n

Precision-engineered European finished bore sprockets manufactured to exacting European standard specifications, delivering reliable power transmission for Colombian industrial machinery and conveyor systems.<\/p>\n

Unlike rough-bore alternatives requiring secondary machining operations, finished bore sprockets arrive completely machined with precision bore dimensions matching standardized shaft diameters, enabling immediate installation without additional processing requirements. This manufacturing approach proves particularly valuable for Colombian facility operators seeking convenient replacement components supporting rapid maintenance procedures without requiring specialized machining equipment or skilled toolmaking personnel. The 20B-1 European standard series incorporates 1 inch pitch specifications with 1-1\/4 inch by 3\/4 inch finished bore dimensions supporting standardized 20B roller chain configurations prevalent throughout Colombian manufacturing, agricultural, and materials handling installations. Modern European finished bore sprockets emphasize precise tooth geometry ensuring optimal engagement with compatible roller chains, promoting extended service life and efficient power transmission throughout demanding duty cycles.<\/p>\n<\/div>\n

1. \u6280\u672f\u89c4\u683c\u548c\u6027\u80fd\u53c2\u6570<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Tooth Count (Z)<\/th>\nOutside Diameter (mm)<\/th>\nHub Diameter (mm)<\/th>\nTooth Height (mm)<\/th>\nOverall Length (mm)<\/th>\nBore Size (mm)<\/th>\n<\/tr>\n<\/thead>\n
09<\/td>\n108<\/td>\n92.84<\/td>\n40<\/td>\n63<\/td>\n31.75 \u00d7 19.56<\/td>\n<\/tr>\n
10<\/td>\n117.9<\/td>\n102.74<\/td>\n40<\/td>\n70<\/td>\n31.75 \u00d7 19.56<\/td>\n<\/tr>\n
11<\/td>\n127.8<\/td>\n112.68<\/td>\n45<\/td>\n77<\/td>\n31.75 \u00d7 19.56<\/td>\n<\/tr>\n
12<\/td>\n137.8<\/td>\n122.68<\/td>\n45<\/td>\n88<\/td>\n31.75 \u00d7 19.56<\/td>\n<\/tr>\n
13<\/td>\n147.8<\/td>\n132.65<\/td>\n45<\/td>\n98<\/td>\n31.75 \u00d7 19.56<\/td>\n<\/tr>\n
13 (variant)<\/td>\n147.8<\/td>\n132.65<\/td>\n45<\/td>\n98<\/td>\n31.75 \u00d7 19.56<\/td>\n<\/tr>\n
14<\/td>\n157.8<\/td>\n142.68<\/td>\n45<\/td>\n108<\/td>\n31.75 \u00d7 19.56<\/td>\n<\/tr>\n
15<\/td>\n167.9<\/td>\n152.72<\/td>\n45<\/td>\n118<\/td>\n31.75 \u00d7 19.56<\/td>\n<\/tr>\n
16<\/td>\n177.9<\/td>\n162.75<\/td>\n50<\/td>\n120<\/td>\n31.75 \u00d7 19.56<\/td>\n<\/tr>\n
17<\/td>\n187.9<\/td>\n172.78<\/td>\n50<\/td>\n120<\/td>\n31.75 \u00d7 19.56<\/td>\n<\/tr>\n
18<\/td>\n198<\/td>\n182.85<\/td>\n50<\/td>\n120<\/td>\n31.75 \u00d7 19.56<\/td>\n<\/tr>\n
19<\/td>\n208.1<\/td>\n192.91<\/td>\n50<\/td>\n120<\/td>\n31.75 \u00d7 19.56<\/td>\n<\/tr>\n
20<\/td>\n218.1<\/td>\n202.98<\/td>\n50<\/td>\n120<\/td>\n31.75 \u00d7 19.56<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Complete specifications demonstrate European finished bore sprocket performance scaling across tooth count configurations from 9-tooth through 20-tooth variants. The standard 31.75mm \u00d7 19.56mm finished bore dimension accommodates 1-1\/4 inch shafts with 3\/4 inch keyways, supporting widespread Colombian industrial equipment installations. All specifications maintain C45 carbon steel material composition ensuring adequate strength characteristics for demanding power transmission applications.<\/p>\n

\"automatictransmissionpart-products-EP20B-1<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n
\u7269\u54c1<\/th>\n\u6beb\u7c73<\/th>\n<\/tr>\n<\/thead>\n
\u94fe\u8f6e<\/td>\n<\/td>\n<\/tr>\n
\u9f7f\u534a\u5f84 r<\/td>\n32<\/td>\n<\/tr>\n
\u534a\u5f84\u5bbd\u5ea6 C<\/td>\n3.5<\/td>\n<\/tr>\n
\u9f7f\u5bbd h1<\/sub><\/td>\n18.5<\/td>\n<\/tr>\n
\u94fe<\/td>\n<\/td>\n<\/tr>\n
\u6ca5\u9752<\/td>\n31.75<\/td>\n<\/tr>\n
\u5185\u90e8\u5bbd\u5ea6<\/td>\n19.56<\/td>\n<\/tr>\n
\u6eda\u8f6e \u03a6<\/td>\n19.05<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

 <\/p>\n

\n

2. Five Critical Advantages of European Standard Finished Bore Sprockets<\/h2>\n
\n

Immediate Installation Without Secondary Machining Requirements<\/h3>\n

European finished bore sprockets eliminate time-consuming and costly secondary machining operations through precision-manufactured bore dimensions matching standardized shaft specifications. Colombian facility maintenance personnel can implement sprocket replacements within minutes rather than days required for custom-bore machining, substantially reducing equipment downtime and supporting responsive maintenance scheduling essential for competitive manufacturing operations.<\/p>\n<\/div>\n

\n

Universal Compatibility with European Standard Chain Systems<\/h3>\n

European standard sprockets maintain dimensional consistency with internationally recognized specifications, ensuring seamless compatibility with 20B roller chains manufactured by diverse global suppliers. Colombian facilities benefit from standardized specifications enabling straightforward procurement of replacement sprockets and chains from multiple suppliers, reducing supply chain dependencies and supporting competitive component sourcing strategies.<\/p>\n<\/div>\n

\n

Simplified Inventory Management Through Standardized Specifications<\/h3>\n

Standardized European finished bore sprockets enable Colombian manufacturers to maintain consolidated spare parts inventories supporting multiple equipment installations throughout facility operations. The 1-1\/4 inch by 3\/4 inch finished bore specification accommodates diverse machinery types, reducing inventory complexity and carrying costs while ensuring immediate component availability for emergency replacement scenarios preventing extended production disruptions.<\/p>\n<\/div>\n

\n

Superior Manufacturing Quality and Dimensional Precision<\/h3>\n

European standard manufacturing emphasizes rigorous quality control procedures and precision machining tolerances ensuring consistent tooth geometry, accurate bore dimensions, and proper pitch spacing throughout production runs. Colombian facility operators benefit from superior dimensional accuracy promoting optimal chain engagement, reducing wear patterns, and extending transmission component service life compared to economy alternatives manufactured to less stringent quality specifications.<\/p>\n<\/div>\n

\n

Cost-Effective Long-Term Value Through Extended Service Life<\/h3>\n

Despite modestly higher initial acquisition costs compared to rough-bore alternatives, European finished bore sprockets deliver superior long-term economic value through extended operational service intervals, reduced maintenance frequency, and elimination of custom machining expenses. Colombian manufacturers recover initial investment premiums through decreased lifetime costs and improved equipment availability supporting consistent production scheduling throughout extended equipment service periods.<\/p>\n<\/div>\n<\/div>\n

\n

3. Operating Principles and Chain Engagement Mechanisms<\/h2>\n

European finished bore sprockets operate through positive mechanical engagement between precision-machined tooth profiles and compatible roller chain components, transmitting rotational motion through direct contact rather than friction-dependent systems characteristic of belt-drive alternatives. The 20B-1 European standard series incorporates 31.75mm pitch specifications matching internationally standardized roller chain dimensions, ensuring universal compatibility across equipment manufactured throughout global markets. During operation, individual chain rollers engage sequentially with sprocket teeth as the driving shaft rotates, transmitting torque through connecting links to the driven sprocket and attached machinery. Precise tooth geometry proves critical for reliable operation, with European standard specifications establishing tooth radius, width, and profile characteristics optimizing roller engagement while minimizing friction and wear patterns throughout extended service intervals. The finished bore configuration provides precision shaft mounting surfaces ensuring concentric sprocket rotation essential for smooth chain engagement and extended bearing life. Colombian facility operators implementing European finished bore sprockets benefit from standardized specifications supporting straightforward replacement component procurement and reliable equipment integration without custom machining requirements. Proper sprocket alignment and chain tension maintenance prove essential for optimal performance, with Colombian facility maintenance protocols emphasizing periodic inspection procedures identifying wear patterns signaling necessary component replacement before catastrophic failure disrupts production schedules. Understanding these operating principles enables facility managers to implement appropriate maintenance procedures maximizing transmission system reliability throughout extended equipment service periods characteristic of Colombian industrial operations.<\/p>\n<\/div>\n

\n

4. \u6750\u6599\u6210\u5206\u548c\u5236\u9020\u6807\u51c6<\/h2>\n

European finished bore sprockets manufactured to 20B-1 specifications incorporate precision-forged C45 carbon steel providing optimal balance between mechanical strength, machinability, and cost-effectiveness for demanding power transmission applications. The C45 material designation indicates approximately 0.45 percent carbon content establishing adequate hardness and wear resistance while maintaining sufficient ductility preventing brittle fracture under shock loading conditions characteristic of Colombian industrial equipment operations. Manufacturing procedures emphasize precision forging establishing consistent grain structures throughout sprocket body profiles, promoting fatigue resistance essential for extended service life under cyclic loading patterns. Subsequent heat treatment processes enhance surface hardness characteristics through controlled heating and quenching procedures, establishing wear-resistant tooth surfaces while maintaining adequate core ductility. Precision machining operations establish finished bore dimensions within tight tolerance specifications ensuring proper shaft fit and concentric rotation essential for smooth chain engagement and extended bearing life. European standard manufacturing emphasizes rigorous quality verification procedures including dimensional inspection, material certification, and load testing confirming component performance characteristics before shipment to Colombian customers. The standardized manufacturing approach ensures consistent component quality regardless of production facility location, supporting reliable supply chain management for Colombian facility operators sourcing replacement sprockets from multiple global suppliers. Surface treatment options including zinc plating or black oxide coating provide enhanced corrosion protection valuable for Colombian facility environments experiencing high humidity or outdoor equipment installations, extending component service life beyond unprotected steel alternatives.<\/p>\n<\/div>\n

\n

5. Application Scenarios for European Standard Sprockets<\/h2>\n
\n
\n

Industrial Conveyor and Materials Handling Systems<\/h3>\n

European finished bore sprockets provide reliable drive solutions for Colombian manufacturing facility conveyors, bucket elevators, and material transport systems. The standardized 20B-1 configuration supports diverse conveyor speeds and load capacities while maintaining dimensional compatibility with internationally sourced roller chains supporting convenient component procurement strategies.<\/p>\n<\/div>\n

\n

Agricultural Equipment and Processing Machinery<\/h3>\n

Colombian agricultural operations utilize European standard sprockets for harvest equipment drives, grain handling systems, and processing machinery transmission. The finished bore configuration enables rapid field repairs and maintenance procedures essential for minimizing downtime during critical harvest periods when equipment availability directly impacts production outcomes.<\/p>\n<\/div>\n

\n

Mining Operations and Heavy Equipment Transmission<\/h3>\n

Mining equipment throughout Colombian extraction operations depends on robust European finished bore sprockets for conveyor drives, ore handling systems, and material transport equipment. The C45 steel construction provides adequate durability for demanding mining environments while standardized specifications support convenient spare parts inventory management across multiple facility locations.<\/p>\n<\/div>\n

\n

Food Processing and Packaging Line Drives<\/h3>\n

Food and beverage manufacturing facilities employ European standard sprockets for ingredient conveying, product handling, and packaging machinery drives. The precision manufacturing and standardized dimensions ensure reliable operation supporting consistent production scheduling essential for Colombian food industry competitive positioning and regulatory compliance requirements.<\/p>\n<\/div>\n

\n

Textile and Manufacturing Production Equipment<\/h3>\n

Colombian textile producers utilize European finished bore sprockets for fabric transport systems, processing machinery, and production line drives requiring precise speed control and reliable power transmission. Standardized specifications support rapid equipment modifications and production changes essential for responsive manufacturing operations serving diverse market requirements.<\/p>\n<\/div>\n

\n

Power Generation and Utility Infrastructure<\/h3>\n

Utility and power generation facilities implement European standard sprockets for auxiliary equipment drives, material handling systems, and facility maintenance equipment. The reliable performance and standardized specifications support essential infrastructure operations requiring consistent equipment availability and straightforward component replacement procedures.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

\"automatictransmissionpart-products-EP20B-1<\/p>\n

\n

6. \u6cd5\u89c4\u9075\u4ece\u6027\u548c\u56fd\u9645\u6807\u51c6<\/h2>\n

European finished bore sprockets manufactured to ISO 606 specifications comply with internationally recognized standards establishing sprocket dimensions, tolerance requirements, and performance characteristics ensuring reliable equipment compatibility across diverse machinery installations throughout Colombian facilities. The European standard designation reflects dimensional specifications optimized for European-manufactured chains while maintaining compatibility with ISO-standard equivalents widely available throughout global markets. Colombian regulatory frameworks increasingly emphasize equipment safety standards requiring properly designed transmission components preventing unexpected failure risks, with European standard sprockets meeting established mechanical design criteria supporting facility compliance objectives. Machine manufacturers throughout Colombia design equipment incorporating European standard transmission components, establishing consistent specifications across diverse production machinery types supporting convenient spare parts procurement and simplified maintenance planning. Quality management system standards including ISO 9001 govern manufacturing processes for premium European finished bore sprockets, ensuring consistent component quality through documented procedures, rigorous inspection protocols, and continuous improvement initiatives. Colombian facilities sourcing replacement sprockets should verify supplier compliance with applicable international standards and quality management systems, ensuring component reliability throughout extended equipment service periods. Environmental regulations applicable to Colombian manufacturing operations emphasize sustainable practices and material stewardship, with responsible sprocket manufacturers implementing recyclable material specifications and environmentally conscious production methodologies supporting facility sustainability objectives. Understanding applicable standards enables Colombian procurement specialists to specify appropriate European finished bore sprockets meeting technical performance requirements while supporting regulatory compliance and corporate sustainability commitments.<\/p>\n<\/div>\n

\n

7. About Precision Sprocket Manufacturing Excellence<\/h2>\n

Professional sprocket manufacturers maintain advanced production facilities incorporating precision forging equipment, controlled heat treatment systems, and rigorous quality verification procedures ensuring consistent European finished bore sprocket characteristics throughout extensive production volumes. Experienced engineering teams evaluate application requirements, operating conditions, and performance specifications enabling precise sprocket recommendations optimizing power transmission efficiency balanced against cost considerations for Colombian facility operators. Established manufacturers maintain comprehensive technical documentation supporting proper European standard sprockets selection, installation procedures, and maintenance schedules enabling optimal equipment performance throughout extended service intervals. Commitment to quality manufacturing and responsive customer support distinguishes leading producers, with technical assistance available for Colombian facilities requiring guidance regarding European finished bore sprockets specifications matching specific equipment requirements and operating conditions.<\/p>\n

\u8f66\u95f4<\/h3>\n
\n
\"\u5236\u9020\u5de5\u5382\"
\n\"Production
\n\"\u8d28\u91cf\u63a7\u5236\"
\n\"Advanced<\/div>\n<\/div>\n<\/div>\n
\n

8. Related Power Transmission Components<\/h2>\n

Complete power transmission systems require carefully selected chains and gearboxes ensuring optimal integration with European finished bore sprockets and reliable system operation. Standardized transmission components support seamless compatibility enabling one-stop procurement simplifying facility supply chain management throughout Colombian operations.<\/p>\n

\n
\n

\u7cbe\u5bc6\u6eda\u5b50\u94fe\u7cfb\u7edf<\/h3>\n

We provide \u6eda\u5b50\u94fe <\/a>solutions manufactured to European standard specifications ensuring seamless compatibility with finished bore sprockets. Our chain engineering emphasizes precise pitch dimensions and roller characteristics promoting optimal sprocket engagement and extended transmission system service life.<\/p>\n

\"Industrial<\/p>\n<\/div>\n

\n

Industrial Gearbox Solutions<\/h3>\n

\u6211\u4eec\u7684 \u53d8\u901f\u7bb1 <\/a>manufacturing delivers precision speed reduction components complementing European finished bore sprockets installations. Precision gearbox engineering enables torque multiplication and speed modification supporting diverse Colombian industrial equipment requirements.<\/p>\n

\"Precision<\/p>\n<\/div>\n<\/div>\n

Integrated transmission solutions combining European finished bore sprockets with compatible chains and gearboxes enable Colombian manufacturers to achieve optimal equipment performance through standardized component specifications supporting straightforward maintenance and convenient replacement procedures throughout extended equipment service periods.<\/p>\n<\/div>\n

\n

\u5173\u4e8e\u6b27\u6d32\u6807\u51c6\u94fe\u8f6e\u7684\u5e38\u89c1\u95ee\u9898<\/h2>\n
\nQ1. What are standard sprocket sizes for European finished bore sprockets used in Colombian industrial equipment?<\/summary>\n

European standard sprocket sizes for 20B-1 series range from 9-tooth through 60-tooth configurations, with finished bore dimensions of 31.75mm \u00d7 19.56mm (1-1\/4 inch \u00d7 3\/4 inch) accommodating standardized shaft specifications. Colombian facilities should select tooth counts based on desired speed ratios and power transmission requirements, with larger tooth counts providing smoother operation while smaller sprockets enable compact equipment designs.<\/p>\n<\/details>\n

\nQ2. What size is a standard chain sprocket compatible with European finished bore sprocket specifications?<\/summary>\n

The 20B-1 European standard series utilizes 31.75mm pitch roller chains commonly designated as 1-1\/4 inch pitch, maintaining dimensional compatibility with ISO 606 specifications. Colombian facility operators can source compatible chains from multiple global suppliers ensuring standardized specifications support straightforward component replacement without equipment modification requirements.<\/p>\n<\/details>\n

\nQ3. How should Colombian manufacturers select appropriate European finished bore sprockets for specific conveyor applications?<\/summary>\n

Proper European finished bore sprockets selection requires evaluation of transmitted power calculated from motor horsepower and operating speed, shaft center-to-center distances affecting chain length requirements, and desired speed ratios established through sprocket tooth count selection. Colombian facility engineers should consult performance tables establishing recommended sprocket specifications for particular application requirements and duty cycle characteristics.<\/p>\n<\/details>\n

\nQ4. Which maintenance schedules maximize European finished bore sprockets service life in Colombian facility operations?<\/summary>\n

Regular lubrication maintenance proves critical for maximizing sprocket and chain service life, with adequate lubrication preventing accelerated wear patterns. Colombian facility operators should implement monthly visual inspections assessing tooth wear, quarterly lubrication system verification, and annual comprehensive transmission assessments. Proper chain tension maintenance prevents premature sprocket wear while reducing mechanical shock stresses throughout power transmission systems.<\/p>\n<\/details>\n

\nQ5. When should Colombian equipment operators consider European finished bore sprockets replacement rather than rough-bore alternatives?<\/summary>\n

European finished bore sprockets prove optimal when immediate installation without secondary machining becomes priority, when standardized shaft dimensions eliminate custom-bore requirements, or when facility spare parts inventory consolidation provides cost advantages. Colombian facilities lacking machining capabilities benefit significantly from finished bore specifications eliminating specialized equipment requirements and enabling rapid maintenance implementation by general maintenance personnel.<\/p>\n<\/details>\n

\nQ6. How do European standard sprockets compare with alternative transmission specifications available for Colombian equipment installations?<\/summary>\n

European standard sprockets provide dimensional compatibility with international equipment manufacturers while maintaining reliable performance characteristics comparable to alternative specifications. Colombian facilities operating European-manufactured equipment benefit from standardized specifications ensuring component compatibility, while those with diverse equipment portfolios appreciate universal availability supporting convenient spare parts procurement from multiple global suppliers.<\/p>\n<\/details>\n<\/div>\n

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EP20B-1 European Finished Bore Sprockets (1-1\/4″\u00d73\/4″) are precision-made from C45 steel for industrial power transmission. Designed for 31.75mm pitch chains, they feature tooth counts Z=9\u201320, with precise dimensions: pitch circle diameter (d\u209a) 92.84\u2013202.98mm, hub height (H) 40\u201350mm, and bore sizes from 25\u201370mm. The sprockets\u2019 tooth geometry (tooth radius 32mm, width 18.5mm) ensures smooth engagement with 19.05mm roller diameter chains, delivering reliable performance in medium-load applications.<\/p>","protected":false},"featured_media":759,"template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[45],"product_tag":[],"class_list":["post-758","product","type-product","status-publish","has-post-thumbnail","product_cat-european-standard-finished-bore-sprocket","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/automatictransmissionpart.com\/zh\/wp-json\/wp\/v2\/product\/758","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/automatictransmissionpart.com\/zh\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/automatictransmissionpart.com\/zh\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/automatictransmissionpart.com\/zh\/wp-json\/wp\/v2\/media\/759"}],"wp:attachment":[{"href":"https:\/\/automatictransmissionpart.com\/zh\/wp-json\/wp\/v2\/media?parent=758"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/automatictransmissionpart.com\/zh\/wp-json\/wp\/v2\/product_brand?post=758"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/automatictransmissionpart.com\/zh\/wp-json\/wp\/v2\/product_cat?post=758"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/automatictransmissionpart.com\/zh\/wp-json\/wp\/v2\/product_tag?post=758"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}