YL Series Flange Coupling

Zero-Backlash Torsional Rigidity

The bolted half-flange design locks both shaft ends into absolute torsional rigidity. No elastic element means zero angular backlash — a critical property for precision servo drives, encoder-coupled machinery, and dynamometer test rigs where positional accuracy directly affects measurement quality and process output.

Comprehensive 10-Model Torque Range

Ten catalogue variants spanning 63 N·m to 100,000 N·m cover everything from light automation drive shafts right through to the heaviest gearbox output couplings in power generation and marine applications — all within a single unified product family with consistent design logic and interchangeable fastener standards.

High-Grade Cast & Ductile Iron

Smaller variants (EP-YL1 to EP-YL5) are produced from HT200 grey cast iron for cost-effective durability. Larger models (EP-YL6 upward) use QT450 ductile iron for superior impact resistance under cyclic loading. All bore and flange surfaces are precision CNC-machined to ensure consistent fit, surface finish, and dimensional repeatability from batch to batch.

Fast Field Assembly & Low Maintenance

The split-flange bolt format allows clean installation and full removal without displacing connected bearings or shafts — a genuine advantage for UK maintenance teams managing tight planned maintenance windows in process industries. There are no wear elements to replace, no lubrication requirements, and no re-torquing schedules beyond standard bolt inspection intervals.

ISO9001 Quality — Traceable & Documented

Every unit is manufactured under a fully certified ISO9001 quality management system. Dimensional inspection records, material test certificates, and surface treatment verification are maintained for each production batch. UK procurement engineers requiring traceability documentation for engineering approval or regulatory compliance can request these records at the time of order.

Flexible Bore Customisation

Non-catalogue shaft diameters, metric and imperial keyway profiles, and custom hub engagement lengths are routinely machined to customer drawings. Step-bore half-couplings accommodating different shaft sizes on each end are a common request from UK OEM and retrofit project teams. Custom surface treatments including galvanising, nickel plating, and food-grade epoxy are also available on request.

Power Generation

Turbine-to-generator couplings in thermal and hydroelectric stations, where high sustained torque, zero backlash, and rotational accuracy directly affect protection relay performance and synchronisation.

Pump & Compressor Drives

Motor-to-pump and motor-to-compressor shafting across water treatment sites, petrochemical plants, and HVAC installations throughout England, Scotland, and Wales.

Paper & Textile Mills

Roll and nip drive systems demanding synchronised, vibration-free torque transmission at sustained process speeds to maintain product quality and reduce web breaks.

Mining & Bulk Handling

Heavy conveyor drives, crusher main drives, and rotary mixers across UK quarry and aggregate operations where structural rigidity and high inertia management are non-negotiable.

UK General Manufacturing

Machine tool spindles, gearbox output coupling, and automated production line drives across Midlands fabrication shops, Northern England foundries, and South East distribution facilities.

“Three years buying EP flange couplings for our paper mill roller drives in Inverness. The bore tolerances are genuinely impressive — every unit has come within 0.01 mm of drawing spec. Delivery to Scotland takes about ten working days, which is workable for our planned maintenance schedule.”

— D. Mackenzie, Maintenance Manager
Caledonian Paper Products Ltd, Inverness, Scotland

“We needed a non-standard 115 mm bore with a DIN keyway and a longer-than-catalogue hub engagement. The technical team handled the drawing review efficiently and confirmed machining feasibility within 24 hours. Exactly what a busy procurement engineer needs from a coupling supplier.”

— T. Ashworth, Procurement Engineer
Northern Drives & Automation Ltd, Manchester, England

“Reviewed three suppliers before selecting EP YL for our West Midlands conveyor upgrade. The price was competitive, the datasheet had all the information we actually needed without having to chase, and the sample landed two weeks after enquiry. Very straightforward process, will order again.”

— R. Patel, Project Engineer
Midland Bulk Handling Systems Ltd, Birmingham, England

England & Wales

Standard delivery to all major industrial regions: the Midlands, Yorkshire, the North West, the South East, and South Wales manufacturing corridors.

Scotland & Northern Ireland

Full mainland Scotland and Northern Ireland coverage via established freight forwarding partnerships, with tracked delivery and documentation.

Export-Ready Documentation

DDP/DDU shipping terms, commercial invoice, packing list, and material certificate supplied as standard for European and global B2B export orders.

Sample Lead Times

Standard catalogue samples dispatched within 3–5 working days. Custom-machined samples within 10–15 working days from confirmed drawing approval.

The EP YL Series covers nominal torques from 63 N·m (EP-YL1) to 100,000 N·m (EP-YL10). To select the right model, calculate your maximum drive torque from motor power and shaft speed, then apply a service factor — typically 1.5 to 2.5 for industrial applications depending on load type and start-stop frequency. The resulting design torque should fall comfortably within your chosen model’s nominal rating. Our applications team assists UK engineers with model selection free of charge: email [email protected] with your motor power (kW), shaft speed (r/min), and shaft diameters.

Unit pricing varies by model size, bore specification, surface treatment, and order volume. Smaller variants like the EP-YL1 and EP-YL2 are cost-effective even in single-unit quantities, while the larger EP-YL8 to EP-YL10 models are priced based on custom configuration. Tiered bulk pricing is available for orders of 10 units or more. For a formal written quotation with per-unit pricing and total order cost — suitable for UK engineering purchase approvals — contact us at [email protected] with your required model, bore diameter, quantity, and delivery postcode.

cardancoupling.top supplies EP YL Series Flange Couplings to UK buyers with factory-direct pricing, full custom bore and keyway machining, and delivery typically within 5–15 working days depending on specification. We cover all of England, Scotland, Wales, and Northern Ireland, and export to Europe and beyond with DDP shipping options. Standard catalogue items ship fastest; bespoke-bore units follow drawing approval. Reach our team at [email protected] to discuss your requirements or request a sample.

Standard units use HT200 grey cast iron (EP-YL1 to EP-YL5) or QT450 ductile iron (EP-YL6 upward), with black oxide or epoxy primer surface treatment. These perform reliably in typical indoor industrial environments. For wet, chemically aggressive, or coastal settings — common in UK water treatment, coastal power stations, and food processing facilities — we offer custom variants with stainless steel 304 or 316 flanges, hot-dip galvanised finish, or food-grade epoxy coating. Please specify the operating environment when requesting a quote so the correct treatment option can be recommended.

Each EP-YL model covers a specific shaft diameter range — for example, the EP-YL5 handles shafts from 63 mm to 80 mm. Measure the actual finished diameter of both your drive shaft and driven shaft. If the two shafts differ in diameter, request a step-bore configuration where each half-coupling is machined to its respective shaft size. Always confirm the bore against the full specifications table on this page before ordering. For non-standard sizes falling between two model ranges, our team can advise on the most practical solution.

A rigid flange coupling is the right choice when your machine design guarantees that shaft-to-shaft alignment — parallel, angular, and axial — is permanently maintained by the bearing housings throughout normal operation. It is particularly well suited to precision machine tool spindle drives, dynamometer rigs, encoder-coupled servo drives, and any application where torsional compliance would introduce measurement error or positional lag. If your installation involves thermal expansion between bearing housings, vibration isolation requirements, or mounting flexibility that creates misalignment during operation, a flexible coupling — jaw, disc, or grid type — is more appropriate and will prevent premature bearing failure.