EP-GL Series Chain Coupling

Wide Torque Range in One Family

Fifteen models covering 40 N·m to 25,000 N·m allow procurement teams to rationalise their approved coupling supplier list to a single product platform, simplifying spares management across multiple drive stations throughout a UK plant or across multiple sites.

Built-in Misalignment Tolerance

The roller chain construction accommodates angular, parallel, and axial shaft misalignment simultaneously. This reduces parasitic side loads on connected bearings and seals — a tangible benefit on UK plant floors where perfect alignment is difficult to maintain across seasonal temperature swings and long production cycles.

Fast On-Site Chain Replacement

Worn chain elements can be swapped out with basic hand tools without disconnecting the hubs from their shafts or disturbing shaft alignment. For UK maintenance teams working within tight planned shutdown windows, this means coupling servicing rarely adds to the critical path of a scheduled outage.

Dual Speed Configuration

Each EP-GL model carries separate speed ratings for open and covered variants. Fitting the protective cover more than doubles the permissible speed on several models, unlocking suitability for higher-speed pump, fan, and compressor drives without moving to a more expensive coupling type.

Standard Chain Sizes — Local Sourcing

Chain sizes follow international standards from TG95X2 through TG635X2. This means emergency replacement chains can often be sourced from UK industrial distributors without relying on proprietary supply chains, reducing spare-parts lead times during unplanned downtime events.

ISO 9001 Certified Manufacturing

Every EP-GL coupling leaves the facility under a certified ISO 9001 quality management system. Material certificates and dimensional inspection documentation are available to support UK procurement audit trails, supplier qualification processes, and project engineering records.

How the Chain Coupling Works

Two sprocket hub assemblies are keyed to the respective shaft ends and locked with set screws or interference fits. A continuous double-row (duplex) roller chain loops around both sprockets, engaging the precision-formed teeth to transfer torque between the driving and driven shaft. The inherent flexibility of the chain link assembly — each link can flex laterally relative to its neighbours — provides the misalignment-absorbing characteristic that distinguishes this coupling type from rigid alternatives.

Where a protective cover is fitted, the housing encloses the chain in a close-tolerance cavity that retains grease or oil. This sustained lubrication significantly reduces pin-and-bushing wear rates and eliminates the need for the frequent manual re-greasing that open configurations require.

Materials & Surface Treatments

Sprocket hubs are machined from medium-carbon alloy steel — typically 45# or 40Cr grade — with tooth flanks induction-hardened to resist abrasive wear during extended cyclic loading. Chain components use carburised steel pins and hardened bushings manufactured to close pitch tolerances, ensuring uniform load distribution across all simultaneously engaged teeth and minimising noise at operating speed.

Protective covers are produced from ductile iron or engineering polymer depending on model size. Optional surface treatments — zinc phosphate, black oxide, or custom paint — are available for environments with elevated corrosion risk, such as coastal UK facilities or chemical process sites.

Where EP-GL Is Used Across the UK

The EP-GL series is routinely found across the full width of UK heavy industry:

• Aggregate and quarrying conveyor primary drives in the Midlands, Wales, and northern England
• Paper and corrugated packaging machine drives in Lancashire and Yorkshire
• Food and beverage processing lines requiring enclosed, lubricant-retaining covers for hygiene compliance
• Pump and compressor drives in the UK offshore and onshore energy sector
• Bulk material handling and cement processing across UK industrial estates
• Agricultural machinery primary drives across rural England and Scotland

We have been running EP-GL8 couplings on our paper mill conveyor drives in Lancashire for over three years. Zero unplanned stoppages tied to the couplings themselves. The on-site chain replacement procedure is genuinely straightforward, and the cost versus European catalogue alternatives was very competitive.

— Production Engineer, Integrated Paper Mill, Lancashire, England

★★★★★

We needed an 88 mm shaft bore — not a standard catalogue size. Ever Power machined it to our drawing within 12 working days, and the dimensional accuracy was exactly right on arrival. The sprocket tooth surface finish was noticeably cleaner than parts from our previous supplier. We will be specifying EP-GL for our site expansion next financial year.

— Maintenance Supervisor, Aggregates Processing Plant, West Yorkshire, England

★★★★★

Competitive pricing and the technical datasheet matched the actual delivered dimensions — that matters during incoming inspection. The covered EP-GL12 units have performed cleanly on our fish processing drives in Aberdeenshire. They meet our hygiene protocol requirements and the covers have not leaked lubricant into the production area.

— Procurement Manager, Seafood Processing Facility, Aberdeenshire, Scotland

★★★★★

✓ Custom Shaft Bores & Keyways

Non-standard bore diameters and keyway profiles machined to your drawings or supplied dimensions

✓ Surface Treatment Options

Zinc phosphate, black oxide, custom painting for corrosive UK industrial environments

✓ Bespoke Cover Designs

Tailored protective covers for specific space envelopes, IP ratings, or hygiene requirements

✓ Full Inspection Documentation

Material certs, dimensional reports, and test records for UK audit and compliance programmes

✓ Prototype to Volume Production

Single-unit prototypes through to large repeat production batches with consistent tolerances

✓ Free Pre-Sales Engineering

Torque calculations, service factor guidance, and model selection reviews at no cost before purchase

What is the maximum torque capacity of the EP-GL Series chain coupling available for heavy-duty conveyor and processing drive applications in the United Kingdom?

The EP-GL15 — the largest model in the series — carries a nominal torque rating of 25,000 N·m and accepts shaft bore diameters from 140 mm to 190 mm. This puts it well within the capacity range for primary belt conveyor drives, rolling mill main drive stations, and large pump installations. For applications involving shock or cyclic impact loads (typical of quarrying and crushing lines), a service factor of 1.5 to 2.5 should be applied to the calculated running torque before confirming the model selection. Our technical team can assist with service factor guidance at no charge — contact [email protected].

How much does an EP-GL Series chain coupling cost, and can UK industrial buyers get a price quote for custom shaft bores or bulk order quantities?

Pricing for EP-GL chain couplings is based on model size, shaft bore specification, surface treatment, and order volume. Standard catalogue configurations are priced competitively against European alternatives, and volume orders attract additional discounts. Custom shaft bores carry a one-time tooling charge on the first order, which is waived on repeat orders of the same specification. To receive a detailed price quotation, email [email protected] with your required model number, shaft bore dimensions, quantity, and any other configuration requirements. Quotations are typically returned within one business day.

Which EP-GL Series chain coupling model should I select for a 75 mm shaft diameter on a primary belt conveyor drive in a UK quarrying or mining plant?

For a 75 mm shaft diameter the EP-GL11 is the closest standard fit, with a shaft bore range of 75 to 100 mm and a nominal torque of 4,000 N·m. Before finalising the selection, calculate your actual drive torque from the motor rated power and speed — using T = (9,550 x P) / n — then apply a service factor appropriate to your load profile (typically 1.5 to 2.5 for quarrying applications with moderate impact loading). If the resulting design torque exceeds 4,000 N·m, step up to the EP-GL12 at 6,300 N·m. Send your motor data to [email protected] for a free selection review.

Where can businesses across England, Scotland, and Wales find a reliable EP-GL chain coupling supplier with technical support and documented international delivery to the UK?

Ever Power supplies EP-GL chain couplings to UK customers directly from its manufacturing facility via established international freight partners, with pre-sales technical support and post-order tracking available through [email protected]. Standard configurations are generally available from production stock with lead times of 7 to 14 days to UK addresses. Customised shaft bore specifications typically require 10 to 15 working days from drawing approval. Full shipping documentation, including commercial invoice, packing list, and material certificates, is provided with every order.

When should I fit a protective cover on my EP-GL chain coupling installed in a UK food processing or aggregate plant, and does the cover change the speed rating?

A protective cover is recommended for any installation involving dust, moisture, chemical splash, or food-grade hygiene requirements — which in UK practice covers the majority of aggregate, food processing, cement, and outdoor pump applications. Beyond the environmental protection, fitting the cover also raises the maximum permissible speed substantially: the EP-GL5 goes from 800 r/min uncovered to 3,150 r/min covered, and the EP-GL8 from 500 r/min to 2,240 r/min. This means the covered configuration is not just an environmental upgrade but often the correct engineering choice for higher-speed pump and centrifugal fan drives as well.

How do I calculate and select the correct EP-GL Series chain coupling size for my UK manufacturing plant or food processing facility drive system?

Selection follows three steps. First, calculate running torque: T (N·m) = (9,550 x P(kW)) / n(r/min). Second, apply a service factor based on load character — 1.25 to 1.5 for smooth, steady loads on food processing lines; 1.5 to 2.0 for moderate shock (conveyors, mixers); 2.0 to 2.5 for heavy cyclic impact (crushing, milling). Third, select the lowest EP-GL model whose nominal torque exceeds the design torque, and verify the shaft bore range covers both connected shaft diameters. If you need help working through these steps, send your motor nameplate data and shaft dimensions to [email protected] — our engineers will provide a full selection recommendation at no charge.