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Need custom specifications or bulk pricing for your UK operation?
What Is the LH12 Series Leaf Chain?
The LH12 Series leaf chain is a plate-and-pin lifting chain engineered to serve the most demanding vertical load applications in warehousing, logistics, and heavy manufacturing environments. Built to both DIN ISO and ANSI standards, this series delivers exceptional tensile strength combined with dimensional consistency that British industrial operators have come to rely on. Whether you are sourcing replacement leaf chain for an existing forklift fleet or specifying new lifting equipment for a warehouse expansion, the LH12 range provides a proven, certified solution that meets the strict safety and performance expectations of UK buyers.
Unlike roller chains, a leaf chain uses only link plates and pins — no rollers or bushings — which means the entire cross-section contributes directly to tensile load capacity. The result is a compact, high-strength assembly that handles cyclical loading without fatigue cracking across a service life measured in millions of cycles. Each chain in the LH12 family is heat-treated and shot-peened where required, then carefully assembled and inspected before dispatch. For UK procurement teams purchasing in bulk or operators seeking a reliable leaf chain supplier with fast lead times, Ever Power offers both stock items and fully customised configurations.
Why Engineers Specify LH12 Leaf Chain
Dual-Standard Certification
Fully compliant with DIN ISO 4347 and ANSI B29.8, enabling direct OEM replacement across European and American forklift platforms without specification compromise.
High-Grade Steel Construction
Plates and pins are manufactured from alloy steel with controlled carbon content, delivering ultimate tensile strengths up to 238.8 kN on the largest LH1288 configuration.
Extended Service Life
Heat treatment and precision-ground pin bores reduce pin-plate interface wear, extending the working life of the chain and reducing maintenance intervals in high-cycle lifting applications.
Multiple Lacing Configurations
The series covers chain lacings from 2×2 through 8×8 within a single 19.05 mm pitch, giving design engineers flexibility to balance tensile load and weight per metre for any mast geometry.
Custom OEM & B2B Supply
Ever Power works directly with UK distributors, maintenance contractors, and OEM assembly lines. Custom lengths, special coatings, and private-label packaging are available with competitive MOQ and short lead times.
How the LH12 Series Works — Principle, Material & Application Scenes
A leaf chain transmits tensile force purely through alternating sets of link plates pinned together by hardened steel pins. There are no rollers, no bushings, and no sprocket engagement — the chain wraps over a smooth sheave or anchor pin at each end of the mast. When a forklift carriage rises, the chain unspools from the sheave and the entire load hangs in direct tension. This simplicity means there are fewer failure modes compared to roller chain: the dominant wear mechanism is elongation at the pin-plate interface, which is measurable and predictable. Operators using the LH12 leaf chain can therefore plan maintenance windows based on measured elongation rather than unexpected failures.
The link plates are stamped from medium-carbon alloy steel strip, then case-hardened to achieve a tough, wear-resistant surface over a ductile core — a combination that resists both fatigue cracking under cyclic loads and sudden brittle fracture under shock loads. The connecting pins are manufactured from case-hardened alloy steel with tight diameter tolerances (max 7.94 mm for the LH12 series) to maintain press-fit integrity throughout the operating life. Before shipment, every batch undergoes proof-load testing to verify that the minimum ultimate tensile strength (Q min) and average tensile strength (Q0) values meet published DIN ISO specification.
Typical Application Scenes in UK Industry
Counterbalance Forklifts
LH1244 and LH1266 are standard choices for the free-lift and full-free mast sections of 2–5 tonne counterbalance trucks used widely in UK distribution centres.
Reach Trucks & Order Pickers
The compact plate height (18.11 mm max) and precise dimensional tolerances allow LH12 leaf chains to fit the tight mast channel clearances found in narrow-aisle reach trucks.
Industrial Hoists & Cranes
Where a linear, guided lifting motion is required at a fixed pitch, the LH1288 with 195.7 kN minimum UTS provides ample safety factor for overhead crane applications.
Automated Storage Systems (AS/RS)
Precisely manufactured LH12 leaf chains ensure consistent indexing accuracy in automated stacker cranes deployed in UK e-commerce fulfilment warehouses operating 24/7 cycles.
Technical Design & Dimension Reference
Technical Specifications — LH12 Series Leaf Chain
All dimensions in mm. Tensile strength values in kN. Weight in kg/m. Pitch (P) = 19.05 mm for all variants.
| DIN ISO Chain No. | ANSI Chain No. | Pitch P (mm) | Chain Lacing | Plate h2 max (mm) | Plate T max (mm) | Pin d2 max (mm) | Pin L max (mm) | UTS Q min (kN) | Avg TS Q0 (kN) | Weight (kg/m) |
|---|---|---|---|---|---|---|---|---|---|---|
| LH1222 | BL622 | 19.05 | 2×2 | 18.11 | 3.3 | 7.94 | 17.37 | 48.9 | 63.6 | 1.45 |
| LH1223 | BL623 | 19.05 | 2×3 | 18.11 | 3.3 | 7.94 | 20.73 | 48.9 | 63.6 | 1.80 |
| LH1234 | BL634 | 19.05 | 3×4 | 18.11 | 3.3 | 7.94 | 27.43 | 75.6 | 102.8 | 2.50 |
| LH1244 | BL644 | 19.05 | 4×4 | 18.11 | 3.3 | 7.94 | 30.78 | 97.9 | 120.9 | 2.90 |
| LH1246 | BL646 | 19.05 | 4×6 | 18.11 | 3.3 | 7.94 | 37.49 | 97.9 | 120.9 | 3.60 |
| LH1266 | BL666 | 19.05 | 6×6 | 18.11 | 3.3 | 7.94 | 44.2 | 146.8 | 190.8 | 4.30 |
| LH1288 | BL688 | 19.05 | 8×8 | 18.11 | 3.3 | 7.94 | 57.61 | 195.7 | 238.8 | 5.80 |
UTS = Ultimate Tensile Strength (Q min). Avg TS = Average Tensile Strength (Q0). Values per DIN ISO 4347 / ANSI B29.8.
Customer Success Stories
Case Study — Coventry Distribution Centre
Reducing Forklift Downtime by 40% with LH1266 Leaf Chain
A third-party logistics provider operating a high-throughput ambient distribution centre near Coventry was experiencing repeated mast chain failures on a fleet of 28 counterbalance forklifts. Their incumbent chain supplier could not maintain consistent dimensional tolerances, leading to premature elongation and unplanned downtime averaging 14 hours per truck per quarter. The operations manager contacted Ever Power after finding specifications online. Following a sample evaluation and proof-load test, the site switched entirely to LH1266 (BL666) leaf chains. Over the subsequent 12-month monitoring period, unplanned chain-related downtime dropped by approximately 40%, and the average chain replacement interval extended from 8 months to over 14 months. The procurement team noted that the cost per running metre was comparable to the previous supplier, making the reliability improvement effectively cost-neutral on a per-unit basis while substantially reducing labour costs associated with in-shift maintenance.
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“We have been sourcing LH1244 and LH1266 chains from Ever Power for two years. The dimensional consistency is excellent — pin diameter tolerance is spot-on every batch, which matters enormously when you are dealing with tight mast clearances on reach trucks.”
James Thornton
Fleet Maintenance Manager · Birmingham, England
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“As a distributor supplying MHE spare parts across Scotland, I need a leaf chain supplier who can turn quotes around quickly and hold stock. Ever Power hit both marks. The LH12 series moves well — customers specifically ask for it by name now.”
Fiona MacAllister
Procurement Director · Edinburgh MHE Supplies, Scotland
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“Our cold-store facility runs forklifts around the clock at -22°C. We tried three different leaf chain suppliers before switching to the LH1288 from Ever Power. Eighteen months in and we have had zero chain-related incidents. The difference in material quality is noticeable.”
Robert Davies
Site Engineering Lead · Manchester Cold Storage Ltd, England
Our Manufacturing Capability & Custom Services
Beyond the standard LH12 catalogue range, Ever Power’s engineering team works closely with OEM customers, maintenance contractors, and specialist distributors to develop custom leaf chain solutions. This service covers non-standard pitch configurations, bespoke plate lacings, special surface treatments (nickel plating, black oxide, zinc phosphating), extended pin protrusions for specific anchor fittings, and private-label packaging for MRO distribution brands. Custom orders are supported by dedicated application engineering consultation at no additional cost, with sample lead times typically under 15 working days for prototypes and confirmed production schedules on agreed quantities. If your application falls outside the published LH12 specification, contact the Ever Power sales team — the answer is almost always yes.
Frequently Asked Questions
Ready to Source LH12 Leaf Chain for Your UK Operation?
Contact Ever Power today for competitive pricing, fast lead times, and expert technical support. Custom specifications welcome.
edit by gzl
