Beschrijving
EP-525H Reinforced Motorcycle Chain – Short Pitch Precision Roller Chain for High-Performance Applications
Engineered for demanding motorcycle and industrial transmission systems, our EP-525H represents the pinnacle of short pitch precision roller chain technology. Manufactured with advanced heat treatment processes and premium alloy steel components, this single row roller chain delivers exceptional tensile strength, wear resistance, and operational reliability across diverse mechanical power transmission applications.
1. Technical Parameters & Specifications
| ISO/ANSI/DIN Kettingnr. |
YHK Kettingnr. |
Pitch P (mm) | Roller Diameter d1 max (mm) | Width between inner plates b1 min (mm) | Pin diameter d2 max (mm) | Pin length L max (mm) | Pin length Lc max (mm) | Inner plate depth h2 max (mm) | Plate thickness T max (mm) | Tensile strength Q min (kN/bf) | Average tensile strength Q0 (kN) | Weight per meter q (kg/m) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 15 | *03C | 4.7625 | 2.48 | 2.38 | 1.62 | 6.10 | 6.90 | 4.30 | 0.60 | 1.80/409 | 2.0 | 0.08 |
| *25 | *04C-1 | 6.3500 | 3.30 | 3.18 | 2.31 | 7.90 | 8.40 | 6.00 | 0.80 | 3.50/795 | 5.0 | 0.15 |
| *35 | *06C-1 | 9.5250 | 5.08 | 4.77 | 3.58 | 12.40 | 13.17 | 9.00 | 1.30 | 7.90/1795 | 11.3 | 0.33 |
| 41 | 085-1 | 12.7000 | 7.77 | 6.25 | 3.58 | 13.75 | 15.00 | 9.91 | 1.30 | 6.67/1516 | 12.6 | 0.41 |
| 40 | 08A-1 | 12.7000 | 7.95 | 7.85 | 3.96 | 16.60 | 17.80 | 12.00 | 1.50 | 14.10/3205 | 18.6 | 0.62 |
| 50 | 10A-1 | 15.8750 | 10.16 | 9.40 | 5.08 | 20.70 | 22.20 | 15.09 | 2.03 | 22.20/5045 | 31.3 | 1.02 |
| 60 | 12A-1 | 19.0500 | 11.91 | 12.57 | 5.94 | 25.90 | 27.70 | 18.00 | 2.42 | 31.80/7227 | 43.2 | 1.50 |
| 80 | 16A-1 | 25.4000 | 15.88 | 15.75 | 7.92 | 32.70 | 35.00 | 24.00 | 3.25 | 56.70/12886 | 74.3 | 2.60 |
| 100 | 20A-1 | 31.7500 | 19.05 | 18.90 | 9.53 | 40.40 | 44.70 | 30.00 | 4.00 | 88.50/20114 | 107.6 | 3.91 |
| 120 | 24A-1 | 38.1000 | 22.23 | 25.22 | 11.10 | 50.30 | 54.30 | 35.70 | 4.80 | 127.00/28864 | 163.1 | 5.62 |
| 140 | 28A-1 | 44.4500 | 25.40 | 25.22 | 12.70 | 54.40 | 59.00 | 41.00 | 5.60 | 172.40/39182 | 222.5 | 7.50 |
| 160 | 32A-1 | 50.8000 | 28.58 | 31.55 | 14.27 | 64.80 | 69.60 | 47.80 | 6.40 | 226.80/51545 | 266.9 | 10.10 |
| 180 | 36A-1 | 57.1500 | 35.71 | 35.48 | 17.46 | 72.80 | 78.60 | 53.60 | 7.20 | 280.20/63682 | 361.1 | 13.45 |
| 200 | 40A-1 | 63.5000 | 39.68 | 37.85 | 19.85 | 80.30 | 87.20 | 60.00 | 8.00 | 353.80/80409 | 466.8 | 16.15 |
| 240 | 48A-1 | 76.2000 | 47.63 | 47.35 | 23.81 | 95.50 | 103.00 | 72.39 | 9.50 | 510.30/115977 | 671.6 | 23.20 |
*Bush chain: d1 in the table indicates the external diameter of the bush
2. Advanced Short Pitch Precision Roller Chain Engineering
The EP-525H chain belongs to the prestigious A-Series short pitch precision roller chains family, specifically designed for applications requiring superior power transmission efficiency and extended service life. This motorcycle chain features precision-manufactured components including hardened steel rollers, heat-treated pins, and specially formulated bushings that work in perfect synchronization to deliver smooth, reliable power transfer. The 525 pitch designation indicates optimized dimensions for high-speed motorcycle applications while maintaining compatibility with standard sprocket configurations. Our manufacturing process incorporates state-of-the-art CNC machining, precision grinding, and multi-stage heat treatment protocols that ensure every chain link meets international quality standards including ISO, ANSI, DIN, and BS specifications. Whether deployed in motorcycles navigating the challenging terrain of Colombian mountain roads or industrial conveyor systems operating in humid tropical environments, the EP-525H maintains consistent performance through rigorous operating conditions. The chain’s reinforced construction addresses specific demands of modern high-torque engines and variable-speed transmission systems commonly found in Latin American markets.
What distinguishes our short pitch transmission precision roller and bush chains from conventional offerings is the meticulous attention to dimensional accuracy and surface finish quality. Each roller undergoes precision grinding to achieve mirror-like surface smoothness, significantly reducing friction coefficients and extending wear life. The bush and pin interference fit is calibrated to micron-level precision, ensuring optimal pre-load that prevents premature wear while maintaining necessary flexibility for smooth articulation around sprockets. This level of precision manufacturing is particularly critical for motorcycle applications where chain vibration and noise must be minimized for rider comfort and mechanical efficiency. The EP-525H chain incorporates specially designed sealing systems that retain factory-applied lubricant while excluding environmental contaminants such as dust, moisture, and corrosive chemicals frequently encountered in industrial and outdoor applications across Colombia and neighboring South American regions.
3. Vijf belangrijke productvoordelen
Superior Tensile Strength Engineering
Manufactured from premium-grade alloy steel with carbon content optimized for maximum tensile strength, the EP-525H achieves breaking loads exceeding industry standards by significant margins. Advanced heat treatment processes including carburizing and tempering create a wear-resistant surface layer while maintaining a tough, shock-absorbent core structure ideal for high-impact motorcycle and industrial applications.
Precision Dimensional Control
Every component in our short pitch precision roller chains undergoes multi-stage quality inspection using advanced CMM measurement systems and laser scanning technology. Pitch accuracy is maintained within ±0.05mm tolerances, ensuring perfect meshing with sprockets and eliminating premature wear caused by dimensional irregularities. This precision is essential for high-speed motorcycle applications where chain elongation must be minimized.
Extended Lubrication Retention
The EP-525H features advanced sealing technology that retains factory-applied high-performance lubricants for extended periods, significantly reducing maintenance requirements compared to non-sealed chain alternatives. Special O-ring or X-ring seals (depending on configuration) prevent lubricant loss while blocking dust, water, and chemical contaminants common in Colombian tropical and mountainous environments.
Multi-Environment Durability
Engineered to perform reliably across temperature extremes from -20°C to +150°C, the EP-525H maintains consistent mechanical properties in diverse climatic conditions. Corrosion-resistant surface treatments including zinc plating or special coating options protect against oxidation in humid coastal regions and high-altitude environments throughout Latin America, extending chain service life significantly.
International Standards Compliance
Our single row roller chain production adheres to multiple international standards including ISO 606, ANSI B29.1, DIN 8187, and BS 228, ensuring universal compatibility with global sprocket systems and facilitating easy integration into existing machinery. Comprehensive quality documentation and traceability systems meet regulatory requirements across European, North American, and South American markets including Colombian import standards.
4. Working Principle of Short Pitch Precision Roller Chains
The operational mechanics of the EP-525H roller chain system exemplify fundamental principles of positive engagement power transmission technology. Unlike belt drives that rely on friction, roller chains achieve power transfer through precise mechanical engagement between chain rollers and sprocket teeth, delivering near-zero slip and exceptional efficiency ratings typically exceeding 98% under optimal conditions. The working cycle begins as the driving sprocket rotates, with its teeth engaging sequentially with the chain rollers positioned at precise pitch intervals. As each roller enters the root diameter of the sprocket tooth, it creates a positive mechanical lock that transfers rotational force from the drive sprocket to the chain assembly. The chain then conveys this mechanical energy along its length to the driven sprocket, where the process reverses as rollers disengage from teeth and new rollers engage in continuous cyclic motion.
Critical to this operation is the articulation mechanism formed by the pin-bushing-roller assembly within each chain link. The hardened steel pin serves as the pivot axis, press-fitted into the outer link plates with precisely calibrated interference to prevent rotation. The bushing, press-fitted into the inner link plates, rotates freely around the stationary pin when the chain flexes during sprocket engagement. The roller, mounted on the outside of the bushing, rotates independently to minimize sliding friction as it contacts sprocket teeth. This triple-element bearing system distributes wear across multiple surfaces and enables the smooth, low-friction operation characteristic of precision roller chains. The pitch dimension, measuring 15.875mm for the 525 series, represents the distance between pin centers and determines the chain’s fundamental operating characteristics including speed capability, load capacity, and sprocket compatibility. Proper tensioning is essential to roller chain function, as insufficient tension allows excessive slack that causes irregular tooth engagement and accelerated wear, while over-tensioning increases bearing loads and power losses. Optimal tension typically allows 2-3% sag in the slack span between sprockets, balancing engagement precision with mechanical efficiency considerations vital for motorcycle performance and industrial reliability.
5. Material Composition & Heat Treatment
The exceptional performance characteristics of the EP-525H short pitch precision roller chain derive directly from our sophisticated material selection and advanced metallurgical processing protocols. Each component undergoes specific material engineering to optimize its functional requirements within the complete chain assembly. The link plates, which bear primary tensile loads during power transmission, are manufactured from SAE 1045 or equivalent medium-carbon steel alloy containing 0.42-0.50% carbon, 0.60-0.90% manganese, and trace elements including silicon and phosphorus. This composition provides an optimal balance between tensile strength and ductility, enabling the plates to withstand shock loads without brittle fracture while maintaining dimensional stability under continuous cyclic stressing. Following precision stamping and hole-punching operations, the plates undergo controlled atmosphere heat treatment consisting of austenitizing at 840-860°C, followed by oil quenching and tempering at 400-450°C to achieve final hardness values of 38-45 HRC, delivering tensile strengths exceeding 800 MPa.
The pins and bushings, which form the articulation joints experiencing complex stress patterns including bending, shear, and wear, require superior material properties achieved through case-hardening processes. Manufactured from SAE 8620 or similar chromium-molybdenum alloy steel containing approximately 0.20% carbon, 0.50% chromium, 0.50% nickel, and 0.20% molybdenum, these components undergo carburizing heat treatment where carbon is diffused into the surface layer at 900-930°C for 6-10 hours, creating a wear-resistant case with 0.60-0.80% carbon content. Following carburization, the components are quenched and tempered to develop a hardness gradient with surface hardness of 58-62 HRC gradually decreasing to a tough core of 30-40 HRC, providing exceptional resistance to wear while maintaining shock absorption capability. The rollers, experiencing rolling contact stress against sprocket teeth, are precision-machined from SAE 1045 steel and through-hardened to 52-58 HRC to resist surface fatigue and maintain dimensional accuracy throughout extended service life. All steel materials are sourced from certified suppliers with full material traceability and undergo incoming inspection including chemical composition analysis, grain structure examination, and mechanical property testing to ensure compliance with specifications before entering production, guaranteeing consistent quality that meets international standards for roller chain applications across automotive, motorcycle, industrial machinery, and agricultural equipment sectors prevalent in Colombian and South American markets.
6. Toepassingsscenario's
High-Performance Motorcycles
The EP-525H excels in sport motorcycles, touring bikes, and adventure motorcycles requiring reliable power transmission under demanding conditions. Engineered to handle torque outputs from 600cc to 1200cc engines, this chain maintains consistent performance during aggressive acceleration, sustained high-speed cruising, and challenging terrain navigation common in Colombian mountain passes and coastal highways. The sealed design protects against dust and moisture intrusion prevalent in tropical climates.
Industrial Conveyor Systems
Widely deployed in material handling applications including food processing plants, packaging machinery, and automated assembly lines. The chain’s precision pitch ensures accurate product positioning while its robust construction withstands continuous operation in environments with temperature fluctuations, moisture exposure, and chemical contamination. Ideal for Colombian manufacturing facilities processing coffee, textiles, and agricultural products requiring reliable mechanical conveyance.
Agricultural Equipment
Essential component in agricultural machinery including combine harvesters, planters, and irrigation systems operating across Latin American farming operations. The chain delivers dependable performance in dusty field conditions, resisting abrasive soil particles while maintaining proper tension during variable load operations. Corrosion-resistant treatments protect against agricultural chemicals and humid storage conditions typical in tropical farming regions throughout Colombia and neighboring countries.
Power Generation Equipment
Critical application in backup generators, small-scale hydroelectric installations, and renewable energy systems where reliable mechanical power transmission is essential. The EP-525H maintains timing accuracy necessary for generator synchronization while withstanding thermal cycling and vibration inherent in engine-driven generator sets. Particularly suitable for remote installations in Colombian mountainous regions where maintenance access is limited and extended service intervals are required.
Textile Machinery
Employed in spinning frames, weaving looms, and fabric finishing equipment requiring precise speed control and minimal vibration. The chain’s smooth operation reduces product defects while its durability ensures continuous production uptime critical for textile manufacturing competitiveness. Well-suited for Colombian textile industry facilities maintaining traditional weaving techniques alongside modern automated production systems where consistent mechanical reliability directly impacts product quality and manufacturing efficiency.
Mining Operations
Proven performance in underground conveyor systems, ore processing equipment, and ventilation machinery operating in harsh mining environments. Enhanced corrosion resistance and robust construction withstand exposure to mineral dust, moisture, and mechanical shock common in Colombian mining operations extracting coal, gold, and emeralds. The chain’s high tensile strength handles heavy material loads while sealed lubrication systems reduce maintenance requirements in challenging underground accessibility conditions.
7. International Regulatory Compliance
The EP-525H short pitch precision roller chain is manufactured in full compliance with comprehensive international standards and regional regulatory requirements governing mechanical power transmission components across global markets. In Colombia, roller chain imports and deployment must satisfy regulations established by the Superintendencia de Industria y Comercio (SIC) regarding product safety, technical specifications, and consumer protection. Our chains meet Colombian NTC standards aligned with international norms, facilitating smooth customs clearance and regulatory approval for industrial machinery installations. The manufacturing facility maintains ISO 9001:2015 quality management certification ensuring consistent production processes and comprehensive traceability documentation required for Colombian import compliance.
European Union machinery directive 2006/42/EC and harmonized standard EN 818-7 establish requirements for chain safety factors, marking, and documentation applicable to equipment exported to European markets. Our chains incorporate appropriate safety factors exceeding 5:1 for lifting applications and 7:1 for shock-loading scenarios, with permanent identification marking including manufacturer information, chain designation, and working load limits as mandated. United States OSHA regulations 1910.212 and 1910.219 govern mechanical power transmission guarding and maintenance safety requirements, which our technical documentation addresses through comprehensive installation and maintenance manuals provided with each shipment. The chains comply with ANSI B29.1 dimensional and strength specifications recognized across North American industrial sectors. For Asian-Pacific markets, conformance with Japanese JIS B1801 standards and Chinese GB/T 1243 specifications ensures broad compatibility with regional machinery and facilitates regulatory acceptance. Brazilian ABNT NBR regulations governing imported industrial components are satisfied through our ISO certification and comprehensive quality documentation system. All materials used in chain manufacture comply with RoHS directives restricting hazardous substances, and environmental management follows ISO 14001 protocols addressing sustainability concerns increasingly emphasized in Latin American regulatory frameworks.
8. About Our Manufacturing Excellence
Our precision roller chain manufacturing facility represents over two decades of continuous investment in advanced production technology and quality management systems. We maintain strict adherence to ISO 9001:2015 quality management standards, with every production lot undergoing rigorous dimensional inspection, tensile strength testing, and wear resistance verification before release. Our engineering team continuously collaborates with motorcycle manufacturers, industrial equipment designers, and end-users throughout Latin America to refine product specifications and develop customized solutions addressing specific application challenges.
Workshop
9. Related Products – Complete Transmission Solutions
We provide comprehensive power transmission solutions beyond precision roller chains, offering complete system compatibility through our full range of complementary components. Our integrated approach ensures optimal performance when roller chains are paired with precision-manufactured sprockets and gear systems, delivering superior reliability and extended service life across your entire drivetrain assembly. This one-stop supply capability simplifies procurement, ensures perfect dimensional compatibility, and reduces integration complexity for motorcycle manufacturers and industrial equipment builders throughout Colombia and Latin America.
Precision Sprockets
Our manufacturing facility produces high-precision sprockets engineered specifically for optimal meshing with our short pitch precision roller chains. Manufactured from case-hardened alloy steel with tooth profiles machined to exacting tolerances, these sprockets ensure smooth power transmission, minimal wear, and extended chain service life. Available in various tooth counts and bore configurations to match your specific application requirements, our sprockets undergo the same rigorous quality control as our chains, guaranteeing system compatibility and performance reliability.
Industrial Gears
Complementing our chain drive solutions, we manufacture comprehensive gear systems including spur gears, helical gears, bevel gears, and worm gears for complex power transmission applications. These precision-ground gears integrate seamlessly with chain-driven systems in multi-stage speed reduction assemblies, enabling complete drivetrain solutions from a single trusted supplier. Our gear manufacturing capabilities leverage the same advanced CNC machining and heat treatment technologies employed in chain production, ensuring consistent quality and performance across your entire mechanical power transmission system.
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Redacteur: PXY
