B Series Heavy‑Duty Roller Chains are upgraded heavy‑duty transmission chains based on standard B‑series short‑pitch precision roller chains, complying with international and domestic standards such as ISO, DIN, and GB. By thickening link plates, strengthening pins and bushes, and optimizing heat treatment processes, they achieve higher tensile strength, stronger fatigue life, and better impact resistance. Specially designed for harsh working conditions with continuous heavy loads, frequent start‑stop, and repeated impacts, they are widely applicable to engineering machinery, port equipment, heavy‑duty conveyors, agricultural machinery, and other fields.
Core Design & Structure
Thickened Link Plate Design: Link plate thickness is upgraded to a larger specification, greatly improving bending and shear resistance to avoid deformation and fracture under heavy loads.
High‑Strength Core Components: Pins, bushes, and rollers are made of high‑quality alloy steels such as 40Cr, 40Mn, and 45Mn. With precision machining, the fit clearance is accurate, ensuring smooth transmission and uniform wear.
Multiple‑Row Configurations Available: Single‑row, double‑row, triple‑row, and other multi‑row configurations are provided to meet different load and space requirements.
Precise Pitch Matching: Pitch ranges from 6.0 to 38.1 mm, with common specifications including 04BH, 06BH, 08BH, 10BH, 12BH, 16BH, 24BH, etc., compatible with standard B‑series sprockets.
Key Performance Advantages
Ultra‑High Fatigue Strength: Fatigue life far exceeds standard chains, capable of withstanding long‑term cyclic impact loads and reducing downtime for maintenance.
Excellent Tensile Performance: Ultimate tensile strength is significantly higher than national/ISO standards, ensuring safer and more reliable heavy‑duty transmission.
Wear & Corrosion Resistance: Precisely heat‑treated via quenching, tempering, carburizing, etc.; surface treatments such as blackening and shot blasting are available to enhance wear resistance and rust prevention.
Low Elastic Elongation: Optimized by pre‑tensioning and running‑in processes, with low elastic elongation, high transmission accuracy, and long tensioning cycles.
Strong Compatibility: Compatible with standard B‑series sprockets; heavy‑duty capacity can be upgraded without replacing sprockets, reducing modification costs.
Typical Application Scenarios
Engineering Machinery: Transmission and conveying systems of excavators, loaders, and cranes.
Port Machinery: Quay cranes, belt conveyors, and container handling equipment.
Heavy‑Duty Conveying: Heavy‑duty conveying lines in mining, metallurgy, and building materials industries.
Agricultural Machinery: Power transmission of combine harvesters, seeders, and tractors.
Industrial Equipment: Heavy‑duty transmission units of textile machinery, printing machinery, and packaging equipment.
Operation & Maintenance Tips
Sprocket teeth are recommended to be made of 35# steel or above and quenched to improve meshing life.
Regularly check chain tension to avoid slack causing chain jumping or excessive tension accelerating wear.
Special heavy‑duty grease is recommended for heavy‑load conditions; lubricate regularly.
Avoid long‑term operation of the chain in environments beyond the working temperature range (-10℃ to 80℃).
| ISO/ANSI/DIN Chain No. | Pitch | Roller diameter | Width Between innerplate | Pin diameter | Pin length | Pin length | Inner Plate depth | Plate thickness | Tensile strength | Weight Per meter |
| P | d1 max mm | b1 min mm | d2 max mm | L max mm | Lc max mm | h2 max mm | t/T max mm | Q min kN/df | q kg/m | |
| | mm | mm | mm | mm | mm | mm | mm | mm | kN/LB | kg/m |
| 04BH | 6.000 | 4.00 | 2.80 | 1.85 | 8.4 | 9.4 | 5.0 | 0.9 | 5.0/1136 | 0.14 |
| *06BH | 9.525 | 6.35 | 5.72 | 3.58 | 14.4 | 1514 | 8.2 | 1.6 | 11.25/2557 | 0.51 |
| 08BH | 12.70 | 8.51 | 7.85 | 4.45 | 18.8 | 19.9 | 11.8 | 2.03 | 20.6/4682 | 0.79 |
| 10BH | 15.875 | 10.16 | 9.65 | 5.08 | 20.2 | 21.6 | 14.7 | 1.85 | 25.0/5681 | 1.03 |
| 12BH | 19.05 | 12.07 | 11.68 | 5.94 | 25.2 | 26.8 | 16.0 | 2.42 | 40.0/9091 | 1.45 |
| 12BV | 19.05 | 1.2.07 | 11.68 | 6.10 | 24.5 | 26.5 | 16.0 | 2.42 | 36.00/8182 | 1.43 |
| 12BHF2 | 19.05 | 112.07 | 13.50 | 5.72 | 28.8 | 30.3 | 16.5 | 2.80 | 35.0/7954 | 1.71 |
| 16BH | 25.40 | 15.88 | 17.02 | 8.90 | 35.7 | 38.9 | 24.1 | 4.0/3.1 | 80.0/8182 | 3.11 |
| 24BH | 38.10 | 25.40 | 25.40 | 14.63 | 58.6 | 6314 | 36.2 | 7.5/6.0 | 225/51136 | 9.00 |
| 24BHF2 | 38.10 | 25.40 | 25.40 | 14.63 | 57.8 | 62.2 | 37.0 | 7.2/6.0 | 225.4/51227 | 9.10 |
