ANSI/ISO Standard BL Series Leaf Chain Manufacturer | Heavy-Duty Lifting Solutions
Heavy-duty vertical lifting operations require structural integrity, superior yield strength, and maximum safety margins. JINQIU CHAIN, a leading BL series leaf chain manufacturer and global supplier, provides complete, high-capacity supply chain services for foreign OEMs, large industrial distributors, dealers, and terminal forklift manufacturing plants worldwide. Operating from our 60,000㎡ ISO-certified manufacturing facility, our BL (LH) heavy-duty leaf chains fully conform to ANSI B29.8, ISO 4347, and DIN 8152 standards, delivering uncompromising tension capacity for demanding material handling equipment.
Engineering Precision for Heavy-Duty Dynamic Lifting
Thicker Link Plates & Heavy Pins: Engineered with link plate thicknesses and pin diameters matching heavy-duty ANSI standards, ensuring maximum fatigue endurance under repeated peak loading.
In-House Carbonitriding & Heat Treatment: Pins and alloy plates undergo proprietary heat treatment and induction hardening, creating deep outer casing hardness and exceptional core toughness to prevent fatigue fracturing.
100-Ton Tensile Verification: Every batch of JINQIU BL leaf chains undergoes factory pre-stretching and dynamic fatigue testing up to 100 tons, guaranteeing strict pitch uniformity and zero sudden elongation.
50+ Professional Engineers: Our expert engineering team provides swift technical support, custom CAD drawings, non-standard lacing combinations (e.g., BL422, BL644, BL866, BL1044), and tailored end clevis attachments for OEM machinery.
Engineered for Forklifts, Port Reach Stackers & Mining Elevators
Unplanned downtime in heavy material handling is costly and dangerous. JINQIU’s BL series heavy-duty leaf chains feature high-precision blanked link plates, shot-peened surface treatment, and hot-dip extreme-pressure synthetic pre-lubrication to maximize wear life. Partnering directly with China's leading chain source ensures global distributors receive factory-direct pricing, stable volume delivery, and comprehensive OEM/ODM custom manufacturing services.
BL Series Leaf Chain Technical Overview (ANSI B29.8 / ISO 4347)
| BL Chain Model | Standard Lacing Options | Primary Machinery Application |
| BL422 to BL566 (0.500" - 0.625" Pitch) | 2x2, 2x3, 3x4, 4x4, 4x6, 6x6 | Standard industrial forklift masts, light hydraulic stackers, & machine lifts |
| BL622 to BL888 (0.750" - 1.000" Pitch) | 2x2, 3x4, 4x4, 4x6, 6x6, 8x8 | Heavy counter-balanced forklifts, boom lifts, & construction elevators |
| BL1022 to BL1688 (1.250" - 2.000" Pitch) | 4x4, 4x6, 6x6, 8x8 (Heavy Lacing) | Port container reach stackers, heavy harbor cranes, & steel mill lifting machinery |
Ensure ultimate safety and durability for your lifting machinery with JINQIU’s BL series leaf chain. Contact our engineering consultants today for factory-direct quotes, certified tensile test reports, and custom clevis fittings.
√ ANSI B29.8 / ISO 4347 Standards √ 50+ Professional Engineers √ 100-Ton Tensile Verification
√ 60,000㎡ ISO Certified Factory √ Forklift OEM Custom Clevis & Attachments
