Kuvaus
What Makes the LL48 Series the Standard for Heavy-Lift Applications?
The LL48 Series leaf chain — often called a plate link chain or balance chain — represents one of the most mechanically demanding product categories in industrial power transmission. Unlike roller chains, leaf chains carry purely tensile loads with no sprocket engagement, making their construction, heat treatment, and surface finish critical to long-term service life. In warehouse logistics, manufacturing facilities, and port handling operations across the United Kingdom, the LL48 Series has earned a reputation as the go-to solution wherever loads demand consistent, high-tensile reliability with predictable fatigue behaviour. These chains conform fully to DIN 8152 and ISO 4347, giving procurement engineers the confidence that every measured parameter — pitch, plate thickness, pin diameter, and breaking load — falls within documented tolerances.
The LL48 family spans four primary variants: LL4822, LL4844, LL4866, and LL4888. The naming convention itself carries engineering meaning — the “48” denotes the pitch series (76.20 mm), while the trailing digits define the lacing configuration, from 2×2 through to the robust 8×8 arrangement. Moving up the lacing count dramatically increases both ultimate tensile strength (from 560 kN to 2240 kN) and average tensile strength (from 627.2 kN to 2508.8 kN), giving design engineers a scalable solution family without changing the mounting interface or chain pitch. This modularity is precisely why UK materials handling OEMs and MRO teams specify the LL48 Series across multiple machine platforms, reducing spare-part complexity while maximising operational uptime.
Key Performance Advantages
Exceptional Tensile Strength
Ultimate tensile loads ranging from 560 kN (LL4822) up to 2240 kN (LL4888) are achieved through precision cold-drawn alloy steel plates, consistent heat-treatment cycles, and controlled shot-peening — processes that simultaneously raise fatigue limit and reduce residual surface stress.
DIN 8152 / ISO 4347 Compliance
Full conformance to recognised international standards means the LL48 Series integrates seamlessly with certified forklift masts, hoist yokes, and counterbalance systems manufactured to CE marking requirements — a non-negotiable for UK PUWER and LOLER compliance documentation.
Scalable Lacing Configuration
The 2×2, 4×4, 6×6, and 8×8 lacing options within the same 76.20 mm pitch series allow engineers to step up load capacity incrementally without redesigning mounting brackets, anchor pins, or sheave layouts — dramatically cutting engineering overhead during machine upgrades.
Low Weight-to-Strength Ratio
At just 18.50 kg/m for the LL4822 and 70.40 kg/m for the LL4888, the LL48 Series delivers industry-leading load capacity per unit mass. This characteristic directly translates to higher net payload for forklift trucks and lower inertial loads in high-cycle hoist applications.
Corrosion-Resistant Surface Options
Standard zinc-phosphate pre-treatment combined with heavy-duty grease packing provides adequate protection for indoor and sheltered outdoor UK environments. For offshore, food processing, or chemically aggressive sites, we offer stainless steel variants and specialist platings — all available as custom orders with short lead times.
Predictable Elongation Wear Signal
Unlike roller chains, the wear elongation of a leaf chain develops linearly with service hours, making periodic inspection routines straightforward. This behaviour enables planned maintenance scheduling — a key factor for UK facilities operating under HSE Approved Code of Practice L117 (LOLER) inspection regimes.
Technical Specifications & Design Data
The following specification table covers all four standard variants within the LL48 Series. All dimensions conform to DIN 8152 and ISO 4347. Data is drawn from factory test reports and should be used for application engineering, not as the sole basis for safety calculations. Contact our technical team for load case analysis on specific lifting applications across England, Scotland, Wales, and Northern Ireland.
| DIN/ISO Chain No. | Pitch P (mm) | Plate Lacing | Plate Depth h2 max (mm) | Plate Thickness T max (mm) | Pin Diameter d2 max (mm) | Pin Length L max (mm) | Ultimate Tensile Strength Q min (kN/lbf) | Average Tensile Strength Q0 (kN) | Weight per Metre q (kg/m) |
|---|---|---|---|---|---|---|---|---|---|
| LL4822 | 76.20 | 2 x 2 | 63.88 | 10.0 | 29.24 | 54.6 | 560.0 / 127272 | 627.2 | 18.50 |
| LL4844 | 4 x 4 | 92.6 | 1120.0 / 254545 | 1554.4 | 35.70 | ||||
| LL4866 | 6 x 6 | 133.4 | 1680.0 / 377953 | 1880.0 | 53.00 | ||||
| LL4888 | 8 x 8 | 174.2 | 2240.0 / 509091 | 2508.8 | 70.40 |
All values conform to DIN 8152 / ISO 4347. Dimensions subject to manufacturing tolerances. Contact factory for certified test certificates.
Construction, Materials & Industrial Applications
Working Principle
A leaf chain transmits tensile force through interlocked steel plates connected by hardened alloy pins, forming an articulating link structure. Unlike roller chains, there are no bushings or rollers — the pin rotates directly against the plate bore, meaning load distribution across the lacing width is the primary structural variable. In a forklift mast, two parallel leaf chains run over guide sheaves in the mast channels; as the hydraulic ram extends, chain tension equalises lift force across the carriage. The LL48 Series handles this cyclical tensile loading for millions of cycles by virtue of precisely controlled inner and outer plate hole geometry, which minimises stress concentration at the critical pin-hole interface.
Material Composition
Plates are cold-drawn from alloy steel strip with a carbon content calibrated for optimum balance between tensile strength and fracture toughness. After punching and profiling, plates undergo carburising or through-hardening heat treatment in controlled atmosphere furnaces, followed by oil quenching and low-temperature tempering to relieve brittleness. Pin blanks are precision-ground from case-hardened alloy rod to achieve a defined surface hardness gradient — hard outer case for wear resistance, tough core to resist bending fatigue. Shot-peening after heat treatment induces beneficial compressive residual stresses on plate surfaces, a process proven to extend fatigue life in high-cycle lifting duty by 30–50% compared to non-peened equivalents.
Typical UK Application Scenarios
The LL48 Series sees primary deployment in counterbalanced forklift trucks and reach trucks operating in UK distribution warehouses, cold-store facilities, and automotive manufacturing plants. Secondary applications include bridge cranes and jib hoists in heavy engineering workshops across the West Midlands, Sheffield steel fabricators, and North Sea oil & gas supply base operations in Aberdeen. Port handling equipment along the Humber and Thames Estuary, as well as quarrying and mining machinery in Wales and the North of England, represent a growing end-market where the LL4866 and LL4888 variants handle loads that smaller-pitch chains simply cannot sustain without excessive strand multiplication.
Customer Success Stories
Real results from industrial buyers who rely on LL48 Series leaf chains in demanding UK and European environments.
Automotive Parts Distribution — West Midlands, England
Birmingham-Based Automotive Logistics Provider Reduces Chain Replacement Frequency by 40%
A third-party logistics company operating a fleet of 48 reach trucks across three distribution centres near Birmingham had been replacing OEM leaf chains every 14 months on average, triggering LOLER re-examination costs and unplanned downtime. After switching to LL4844 Series chains from Ever Power, and implementing the recommended lubrication intervals, their maintenance team recorded an average replacement interval extension to 22 months on the same fleet — a 57% improvement. The engineering manager noted that the consistency of pin diameter tolerances across production batches was a key factor: previous suppliers had shown measurable variation that caused uneven chain elongation across dual-strand mast installations, accelerating fatigue. The LL4844 batch reports now accompany each delivery, allowing incoming inspection to be completed in minutes rather than requiring full dimensional re-checks. Total annual maintenance cost reduction across the three sites exceeded £34,000.
“We’ve been fitting LL4866 chains into our 12-tonne overhead cranes at our Sheffield forge for three years. The dimensional accuracy means our crane service team can install them straight from the box without any shimming or re-measurement. Zero in-service failures since we made the switch.”
“Procurement lead time was our biggest concern when we first contacted Ever Power. They delivered a full pallet of LL4888 chains to our Aberdeen supply base within 12 working days — certified, batch-documented, and ready for our offshore certification process. The price was competitive and the after-sales support from their technical team is genuinely excellent.”
“We specified LL4822 chains for a custom automated stacker we designed for a food distribution client near Bristol. The weight-per-metre figure was critical — every extra kilogram in the mast assembly reduces net payload. Ever Power’s LL4822 at 18.50 kg/m was the lightest certified option we found at that tensile rating. The custom pin-length option they offered saved us significant fabrication cost on the anchor plates.”
Manufacturing Capability & Custom Chain Solutions
Ever Power operates a vertically integrated manufacturing facility equipped with precision stamping presses, multi-zone heat treatment furnaces, automated shot-peening lines, and co-ordinate measurement machines that verify critical dimensions on a statistical sampling basis for every production batch. Our in-house quality system is aligned with ISO 9001, and all LL48 Series chains are subjected to tensile proof loading as standard — not merely dimensional inspection — before despatch. For UK buyers requiring third-party certification bodies such as Lloyd’s Register, DNV, or Bureau Veritas, we can arrange witnessed tests and issue compliant certificates at competitive additional cost.
Our Product Customisation Capabilities
Non-standard pin lengths — extended or shortened to your exact anchor plate geometry, available from MOQ 10 metres.
Special surface treatments — nickel plating, zinc-nickel, black oxide, or specialist polymer coating for corrosive or food-grade environments.
Pre-assembled anchor links & connecting links — supplied ready for installation to reduce field assembly time and error risk.
Stainless steel variants — austenitic (304/316) for offshore, marine, and pharmaceutical lifting applications demanding full corrosion immunity.
Private-label packaging — OEM-branded chain for materials handling equipment manufacturers supplying the UK aftermarket.
Batch traceability documentation — heat number, tensile test report, dimensional CMM data, and material certificate available on request for safety-critical applications.
Trusted Leaf Chain Supplier for UK Industry
UK procurement teams face a specific set of constraints when sourcing lifting chains: LOLER inspection intervals demand reliable service-life data; PUWER requires documented conformity of lifting accessories; and import lead times following supply chain disruptions have driven many MRO buyers toward suppliers with proven despatch reliability. Ever Power addresses each of these requirements directly. Our LL48 Series leaf chains ship with full dimensional and tensile documentation as standard, reducing the administrative burden on your engineering and safety teams. We maintain stock of the most common LL48 variants — LL4822 and LL4844 — to support urgent replacement requirements for facilities across Greater London, the East Midlands, Yorkshire, and beyond.
Our technical sales team includes application engineers with backgrounds in mechanical handling and lifting equipment who understand the regulatory framework UK buyers operate within. Whether you are sourcing replacement chains for a certified forklift fleet, specifying chains for a new OEM design, or evaluating the cost of upgrading from an LL46 to LL48 series for increased load capacity, we can provide the detailed technical support and competitive pricing that helps you make the right decision quickly.
