{"id":4209,"date":"2026-05-27T03:27:27","date_gmt":"2026-05-27T03:27:27","guid":{"rendered":"https:\/\/cardancoupling.top\/?post_type=product&p=4209"},"modified":"2026-05-27T08:48:50","modified_gmt":"2026-05-27T08:48:50","slug":"yl-series-flange-coupling","status":"publish","type":"product","link":"https:\/\/cardancoupling.top\/ms\/product\/yl-series-flange-coupling\/","title":{"rendered":"YL Series Flange Coupling"},"content":{"rendered":"
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Rigid Flange Coupling \u00b7 UK Industrial Supply<\/p>\n

EP YL Series Flange Coupling<\/h2>\n

High-Torque Rigid Drive Coupling \u00a0|\u00a0 63 N\u00b7m to 100,000 N\u00b7m \u00a0|\u00a0 10 Model Variants \u00a0|\u00a0 Custom Bore Available<\/p>\n

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\u2705 ISO9001 Certified<\/div>\n
\u2705 20+ Years Manufacturing<\/div>\n
\u2705 Custom Bore & Keyway<\/div>\n
\u2705 UK & Global B2B Shipping<\/div>\n<\/div>\n<\/div>\n

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What Is the EP YL Series Flange Coupling?<\/h2>\n

\"YLThe EP YL Series Flange Coupling is a precision-engineered rigid shaft coupling designed to meet the demanding requirements of heavy-duty industrial power transmission. Built from high-grade cast iron and structural steel, it provides an outstanding combination of mechanical stiffness, dimensional accuracy, and long-term fatigue resistance. The series spans ten model variants \u2014 EP-YL1 through EP-YL10 \u2014 covering nominal torque ratings from 63 N\u00b7m all the way to 100,000 N\u00b7m, making it one of the most comprehensive rigid coupling ranges available to UK industrial engineers. Whether you are operating a pump test rig in Yorkshire, a paper mill drive in Inverness, or heavy conveyor shafting across the West Midlands, the YL flange coupling delivers consistent rotational precision, zero backlash, and smooth energy transfer under sustained high-speed operation. Every unit is CNC-machined to tight dimensional tolerances, ensuring reliable bolt-flange engagement, minimal vibration transmission, and a long service life without complex maintenance requirements.<\/p>\n

The bolted flange design separates each coupling into two half-flanges keyed onto the respective shaft ends and drawn together by high-grade fasteners. This straightforward mechanical architecture not only ensures torsional rigidity but also facilitates rapid field installation and replacement without disturbing bearing housings or aligned equipment \u2014 an important consideration for maintenance teams managing planned shutdowns across UK manufacturing facilities.<\/p>\n<\/div>\n

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\ud83d\udce7\u00a0 Get a Quote \u2014 sales@cardancoupling.top<\/a><\/p>\n

Response within 24 hours \u00a0\u00b7\u00a0 Custom bore & keyway available \u00a0\u00b7\u00a0 Competitive B2B pricing for UK buyers<\/p>\n<\/div>\n

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Technical Specifications & Dimensions<\/h2>\n

The table below contains the full dimensional and performance data for all ten EP YL Series variants. Shaft diameters, flange outer diameters, and lengths are in millimetres. Torque values are in N\u00b7m. Inertia moment values are in kg\u00b7m\u00b2.<\/p>\n


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\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Type<\/th>\nNominal Torque
\nTnN (N\u00b7m)<\/th>\n		Allowable Speed
\n[n] r\/min<\/th>\n		Shaft Hole
\nDiameter d (mm)<\/th>\n		Shaft Hole
\nLength L Y.J. (mm)<\/th>\n		D (mm)<\/th>\nD1 (mm)<\/th>\nb (mm)<\/th>\nS (mm)<\/th>\nb1 (mm)<\/th>\nBolt d.<\/th>\nn<\/th>\nInertia Moment
\n(kg\u00b7m\u00b2)<\/th>\n		Weight (kg)<\/th>\n<\/tr>\n<\/thead>\n
EP-YL1<\/td>\n63<\/td>\n6300<\/td>\n22 ~ 30<\/td>\n38 ~ 82<\/td>\n120<\/td>\n48<\/td>\n36<\/td>\n8<\/td>\n52<\/td>\nM10<\/td>\n4<\/td>\n0.006<\/td>\n4.10<\/td>\n<\/tr>\n
EP-YL2<\/td>\n200<\/td>\n5800<\/td>\n30 ~ 42<\/td>\n60 ~ 112<\/td>\n130<\/td>\n68<\/td>\n36<\/td>\n8<\/td>\n52<\/td>\nM10<\/td>\n4<\/td>\n0.008<\/td>\n6.97<\/td>\n<\/tr>\n
EP-YL3<\/td>\n400<\/td>\n5000<\/td>\n40 ~ 50<\/td>\n84 ~ 112<\/td>\n150<\/td>\n80<\/td>\n40<\/td>\n8<\/td>\n56<\/td>\nM12<\/td>\n4<\/td>\n0.021<\/td>\n9.38<\/td>\n<\/tr>\n
EP-YL4<\/td>\n800<\/td>\n4400<\/td>\n50 ~ 63<\/td>\n84 ~ 142<\/td>\n170<\/td>\n100<\/td>\n40<\/td>\n8<\/td>\n56<\/td>\nM12<\/td>\n8<\/td>\n0.039<\/td>\n23.27<\/td>\n<\/tr>\n
EP-YL5<\/td>\n2000<\/td>\n3600<\/td>\n63 ~ 80<\/td>\n107 ~ 172<\/td>\n210<\/td>\n130<\/td>\n50<\/td>\n10<\/td>\n68<\/td>\nM12<\/td>\n8<\/td>\n0.122<\/td>\n30.72<\/td>\n<\/tr>\n
EP-YL6<\/td>\n5000<\/td>\n2800<\/td>\n80 ~ 100<\/td>\n132 ~ 212<\/td>\n260<\/td>\n160<\/td>\n66<\/td>\n10<\/td>\n84<\/td>\nM16<\/td>\n8<\/td>\n0.360<\/td>\n57.95<\/td>\n<\/tr>\n
EP-YL7<\/td>\n10000<\/td>\n2500<\/td>\n100 ~ 125<\/td>\n167 ~ 212<\/td>\n300<\/td>\n200<\/td>\n72<\/td>\n10<\/td>\n90<\/td>\nM16<\/td>\n10<\/td>\n0.845<\/td>\n86.10<\/td>\n<\/tr>\n
EP-YL8<\/td>\n25000<\/td>\n1900<\/td>\n125 ~ 160<\/td>\n167 ~ 302<\/td>\n400<\/td>\n260<\/td>\n80<\/td>\n10<\/td>\n98<\/td>\nM24<\/td>\n10<\/td>\n2.693<\/td>\n202.3<\/td>\n<\/tr>\n
EP-YL9<\/td>\n50000<\/td>\n1600<\/td>\n160 ~ 200<\/td>\n242 ~ 352<\/td>\n460<\/td>\n320<\/td>\n92<\/td>\n12<\/td>\n112<\/td>\nM24<\/td>\n16<\/td>\n6.962<\/td>\n326<\/td>\n<\/tr>\n
EP-YL10<\/td>\n100000<\/td>\n1200<\/td>\n200 ~ 250<\/td>\n282 ~ 410<\/td>\n590<\/td>\n400<\/td>\n104<\/td>\n12<\/td>\n124<\/td>\nM30<\/td>\n16<\/td>\n20.550<\/td>\n622<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u24d8\u00a0 Weight and moment of inertia are approximate values calculated according to the minimum diameter and maximum length of the shaft hole of the I-type coupling. The same type of shaft hole can be arbitrarily combined.<\/p>\n<\/div>\n

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Why Engineers Across the UK Choose the EP YL Flange Coupling<\/h2>\n

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Zero-Backlash Torsional Rigidity<\/strong><\/p>\n

The bolted half-flange design locks both shaft ends into absolute torsional rigidity. No elastic element means zero angular backlash \u2014 a critical property for precision servo drives, encoder-coupled machinery, and dynamometer test rigs where positional accuracy directly affects measurement quality and process output.<\/p>\n<\/div>\n

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Comprehensive 10-Model Torque Range<\/strong><\/p>\n

Ten catalogue variants spanning 63 N\u00b7m to 100,000 N\u00b7m cover everything from light automation drive shafts right through to the heaviest gearbox output couplings in power generation and marine applications \u2014 all within a single unified product family with consistent design logic and interchangeable fastener standards.<\/p>\n<\/div>\n

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High-Grade Cast & Ductile Iron<\/strong><\/p>\n

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.<\/p>\n<\/div>\n

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Fast Field Assembly & Low Maintenance<\/strong><\/p>\n

The split-flange bolt format allows clean installation and full removal without displacing connected bearings or shafts \u2014 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.<\/p>\n<\/div>\n

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ISO9001 Quality \u2014 Traceable & Documented<\/strong><\/p>\n

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.<\/p>\n<\/div>\n

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Flexible Bore Customisation<\/strong><\/p>\n

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.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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How It Works: Operating Principle, Materials & Real-World Scenarios<\/h2>\n

\"EPThe EP YL Series Flange Coupling operates on a well-proven mechanical principle: two precision-machined half-flanges are separately keyed or shrink-fitted onto the respective shaft ends, then drawn face-to-face by high-tensile bolts arranged on a defined pitch circle. When the bolts are torqued to specification, the controlled preload at the mating flange faces generates a friction-locked, torsionally rigid joint. Torque is transmitted through a combination of bolt shear resistance and flange face friction, with no compliant element between the driving and driven halves. This means there is no torsional wind-up, no angular play, and no energy storage \u2014 characteristics that make the rigid flange coupling the preferred solution wherever the machine’s bearing arrangement can permanently maintain alignment during operation.<\/p>\n

Material selection across the YL range is deliberately graded by application demand. The HT200 grey cast iron used in the smaller models provides excellent vibration damping, good machinability for tight bore tolerances, and acceptable impact resistance for most general manufacturing environments. For models EP-YL6 through EP-YL10, QT450 ductile iron provides the higher tensile strength, elongation, and impact toughness needed for heavy cyclic loading in mining, paper production, and turbine-generator drives. All exposed surfaces receive black oxide or epoxy primer treatment as standard, with additional corrosion protection options available for the wet industrial environments common across UK water treatment and coastal facilities.<\/p>\n

Typical Application Environments<\/h3>\n
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Power Generation<\/strong><\/p>\n

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.<\/p>\n<\/div>\n

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Pump & Compressor Drives<\/strong><\/p>\n

Motor-to-pump and motor-to-compressor shafting across water treatment sites, petrochemical plants, and HVAC installations throughout England, Scotland, and Wales.<\/p>\n<\/div>\n

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Paper & Textile Mills<\/strong><\/p>\n

Roll and nip drive systems demanding synchronised, vibration-free torque transmission at sustained process speeds to maintain product quality and reduce web breaks.<\/p>\n<\/div>\n

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Mining & Bulk Handling<\/strong><\/p>\n

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.<\/p>\n<\/div>\n

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UK General Manufacturing<\/strong><\/p>\n

Machine tool spindles, gearbox output coupling, and automated production line drives across Midlands fabrication shops, Northern England foundries, and South East distribution facilities.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Customer Success Story<\/h2>\n

A documented case study from one of our established UK industrial partners.<\/p>\n

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\ud83c\uddec\ud83c\udde7<\/div>\n
Hartley Industrial Pumps Ltd \u2014 Harrogate, Yorkshire<\/strong>
\nWater Treatment \/ Large-Diameter Centrifugal Pump Manufacturer \u00a0\u00b7\u00a0 EP-YL6 & EP-YL7<\/span><\/div>\n<\/div>\n

Hartley Industrial Pumps Ltd designs and tests large-diameter centrifugal pumps for UK water authorities and wastewater management companies. Their three pump test rigs \u2014 running 75 kW motors at up to 4,200 r\/min \u2014 had been fitted with disc-pack flexible couplings from a different supplier. After 18 months of service, the disc packs were showing fatigue cracking at the bolt interface, causing coupling-related downtime averaging 18 hours per month across the test floor. Hartley’s maintenance manager approached us looking for a zero-maintenance, high-rigidity replacement that could handle the full test torque without compliance.<\/p>\n

Our applications team specified the EP-YL6 flange coupling (5,000 N\u00b7m rated, 2,800 r\/min maximum) with a custom step-bore configuration: 90 mm on the motor side and 100 mm on the pump shaft side with a J7\/h6 interference fit. Units were delivered with full dimensional inspection documentation within 12 working days.<\/p>\n

Following a 6-month post-installation monitoring period, Hartley Engineering reported zero coupling-related downtime. As a secondary benefit, the torsional rigidity of the YL flange coupling improved their in-house pump torque measurement accuracy by an estimated 11\u201313%, a commercially significant gain in their pump performance certification workflow. They subsequently ordered EP-YL7 units for two additional rigs expanded later that year.<\/p>\n

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What Our B2B Customers Say<\/h3>\n
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“Three years buying EP flange couplings for our paper mill roller drives in Inverness. The bore tolerances are genuinely impressive \u2014 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.”<\/p>\n

\u2014 D. Mackenzie, Maintenance Manager<\/strong>
\nCaledonian Paper Products Ltd, Inverness, Scotland<\/span><\/p>\n

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“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.”<\/p>\n

\u2014 T. Ashworth, Procurement Engineer<\/strong>
\nNorthern Drives & Automation Ltd, Manchester, England<\/span><\/p>\n

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“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.”<\/p>\n

\u2014 R. Patel, Project Engineer<\/strong>
\nMidland Bulk Handling Systems Ltd, Birmingham, England<\/span><\/p>\n

\u2605\u2605\u2605\u2605\u2606<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Our Manufacturing Facility & Custom Coupling Capabilities<\/h2>\n

The production campus spans 55 mu (approximately 36,600 m\u00b2), with a dedicated precision coupling<\/a> workshop of 12,000 m\u00b2. The facility runs 108 sets of production machines including CNC turning centres, radial drilling machines, horizontal boring mills, CO\u2082 welding stations, heat treatment furnaces, and coordinate measuring systems. With over 20 years of continuous coupling manufacturing experience and a fully maintained ISO9001 quality management certification, the operation is structured to handle both high-volume standard production runs and technically demanding custom coupling projects simultaneously without compromising lead times or quality.<\/p>\n

Custom flange coupling engineering is genuinely a core capability \u2014 not an afterthought. Our applications team works directly with UK OEM design engineers, mechanical contractors, and procurement managers to develop solutions that fall outside the standard catalogue. Typical custom services include non-standard bore diameters and keyway profiles machined to customer drawings, step-bore half-couplings connecting shafts of different diameters at each end, special pilot boss configurations, extended hub lengths for increased shaft engagement, modified bolt-circle patterns, and alternative material grades including stainless steel 304\/316, aluminium alloy, and engineering polymers. Drawing review and feasibility confirmation are provided within 24 hours for most enquiries, and dimensional sample approval reports are issued as standard for first-off custom parts.<\/p>\n

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Custom Flange Coupling Service Overview<\/strong><\/p>\n