{"id":2362,"date":"2026-03-23T02:34:48","date_gmt":"2026-03-23T02:34:48","guid":{"rendered":"https:\/\/gear-type-coupling.top\/?post_type=product&p=2362"},"modified":"2026-03-24T07:36:47","modified_gmt":"2026-03-24T07:36:47","slug":"yl-series-flange-coupling","status":"publish","type":"product","link":"https:\/\/gear-type-coupling.top\/ro\/product\/yl-series-flange-coupling\/","title":{"rendered":"YL Series Flange Coupling"},"content":{"rendered":"
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Precision Power Transmission \u00b7 ISO9001 Certified \u00b7 UK B2B Supply<\/p>\n

YL Type Rigid Flange Coupling<\/h2>\n

Zero-backlash shaft connection engineered for high-torque industrial drives. Supplied with full material traceability to procurement teams across the United Kingdom and globally.<\/p>\n

Get a Quote<\/a>
\nTalk to an Engineer<\/a><\/div>\n<\/div>\n

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\u2714 ISO9001:2015 Certified<\/span>
\n\u2714 20+ Years Manufacturing<\/span>
\n\u2714 Custom Bore & Keyway Options<\/span>
\n\u2714 Full Material Traceability<\/span>
\n\u2714 Export to 40+ Countries<\/span><\/div>\n<\/div>\n

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Prezentare general\u0103 a produsului<\/h2>\n

\"cuplaj<\/p>\n

\u2460 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. \u2461 The same type of shaft hole can be arbitrarily combined.<\/p>\n

Request a Quote \u2192<\/a><\/div>\n<\/div>\n

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What Is a YL Type Rigid Flange Coupling?<\/h2>\n

The YL type rigid flange coupling is a bolted flange connector designed to create a permanently stiff, coaxially aligned union between two rotating shafts. Unlike flexible or jaw-type couplings, this design tolerates zero angular or axial misalignment \u2014 a requirement that, in practice, compels engineers to prepare and verify shaft alignment with precision tools, and in doing so, guarantees a higher overall drivetrain accuracy and dramatically reduces vibration in sensitive machinery. The coupling consists of two flanged hubs keyed onto each shaft end and fastened face-to-face with a pattern of high-tensile bolts. Torque is transmitted purely through shear forces acting on the bolt group, making the joint extraordinarily stiff and ideal wherever torsional compliance would introduce positioning error, timing drift, or resonance problems in the connected equipment.<\/p>\n

In the United Kingdom’s demanding industrial environment \u2014 from compressor stations serving North Sea operations to water treatment facilities managed by Thames Water and Anglian Water in East Anglia, to heavy-duty conveyor drives in Yorkshire steel plants \u2014 engineers regularly specify the rigid flange coupling wherever power density is high and shaft speeds are moderate. The YL series covers a broad range of bore diameters, with Type I (straight bore) and Type II (tapered bore) hub options available, so that the same coupling body can accommodate different shaft configurations on a single drivetrain. This combinatorial flexibility shortens lead times and simplifies the management of spare-parts holdings in multi-machine facilities where a single maintenance team may be responsible for dozens of rotating assets.<\/p>\n

Manufactured from either high-strength HT250 grey cast iron or 45# carbon steel, the YL rigid flange coupling achieves a practical balance between weight, machinability, and structural integrity. All mating flange faces are finish-ground to guarantee perpendicularity between the face and the bore axis. Every production batch undergoes process controls covering raw-material certification, dimensional inspection, surface finish verification, and functional load-path analysis under the ISO9001:2015 quality management system, ensuring that each coupling despatched to a UK customer arrives with complete traceability documentation that satisfies supplier-audit requirements under procurement frameworks such as PAS 55 and ISO 55000.<\/p>\n

\"Cuplare\"<\/p>\n<\/div>\n

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Why UK Engineers Choose the YL Rigid Flange Coupling<\/h2>\n
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\u2699\ufe0f<\/p>\n

Zero-Backlash Transmission<\/h3>\n

The all-metal flange joint eliminates the elastic play that rubber or polyurethane elements introduce into flexible couplings. This characteristic is critical in servo-driven presses, extruders, printing lines, and precision test-bench dynamometers where positioning repeatability directly determines finished-product quality. UK aerospace and defence supply chain engineers specifically call for zero-backlash couplings to comply with tight component tolerance schedules and traceability mandates.<\/p>\n<\/div>\n

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Wide Torque Range<\/h3>\n

YL rigid flange couplings are rated from compact units handling 63 Nm right through to heavy-duty assemblies managing 10,000 Nm and beyond. This makes the series equally at home on a small pump motor shaft and on the output end of an industrial gearbox driving a large centrifugal fan in a combined-heat-and-power plant. With a single product family covering such a wide performance envelope, procurement teams can consolidate their approved supplier lists and reduce the administrative overhead of managing multiple coupling types.<\/p>\n<\/div>\n

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Flexible Bore Configurations<\/h3>\n

The YL series supports Type I straight-bore and Type II tapered-bore hub designs, which can be freely combined on the same coupling body. This means a maintenance team can standardise on a single coupling part number while accommodating different shaft diameters on either side of a drive \u2014 reducing the range of spares held in stores and accelerating the repair cycle during planned maintenance shutdowns, which is particularly valuable at high-throughput facilities where every hour of downtime carries a measurable production cost.<\/p>\n<\/div>\n

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ISO9001-Backed Quality Assurance<\/h3>\n

Every YL rigid flange coupling leaving the HZPT facility passes documented process controls covering raw-material certification, dimensional inspection, surface finish measurement, and load-path verification under ISO9001:2015. Full traceability from casting or forging through to final despatch is maintained, which directly addresses the supply-chain audit requirements that UK engineering contractors and facility operators increasingly impose on critical rotating component suppliers.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Technical Parameters \u2014 YL Series<\/h2>\n

Representative performance data for standard YL model range. Custom bore diameters, alternative materials (SS304, SS316, ductile iron), and non-standard surface treatments are available on request. Contact our engineering team for a datasheet matched specifically to your application.<\/p>\n

\"cuplajAll specifications subject to manufacturing tolerances. Values shown are for standard Type I (straight bore) configurations. Custom keyway dimensions, interference fits (H7\/k6, H7\/r6), and corrosion-protection coatings are available.<\/p>\n<\/div>\n

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Operating Principle, Materials & Application Scenarios<\/h2>\n
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How the Coupling Transmits Torque<\/h3>\n

Torque travels from the driving shaft through a keyed or interference-fit hub into the first flange body, across a precision-ground mating face secured by a bolt pattern, and into the second keyed hub on the driven shaft. Because the entire joint is metallic and mechanically compressed, there is no elastic deformation under rated load \u2014 torsional stiffness is effectively infinite within the design envelope. A correctly installed YL rigid flange coupling introduces no measurable lag between input and output motion, which is essential in synchronised multi-axis systems and in test-bench applications where measurement accuracy depends on the coupling itself adding no angular error.<\/p>\n<\/div>\n

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Material Selection Guide<\/h3>\n

Standard YL3 to YL7 couplings use HT250 grey cast iron, which offers excellent vibration damping, good machinability, and adequate tensile strength for the majority of industrial pump and fan drives. From YL9 upwards, hub and flange bodies are machined from 45# medium-carbon steel, providing higher yield strength and fatigue resistance for applications with cyclic loading or shock starting. For food-processing, pharmaceutical, and coastal\/offshore installations where chlorinated cleaning agents or salt-laden air are present, our SS304 and SS316 variants are the recommended choice, meeting the hygienic design requirements demanded by UK food industry standards and British coastal infrastructure codes.<\/p>\n<\/div>\n<\/div>\n

Where the YL Coupling Is Applied Across UK Industry<\/h3>\n
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Water & Utilities<\/p>\n

Pump-to-motor shaft connections at sewage treatment and clean-water supply stations operated by Thames Water, Severn Trent, and Yorkshire Water.<\/p>\n<\/div>\n

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\u26a1<\/p>\n

Generarea de energie<\/p>\n

Generator set drive trains in UK combined-heat-and-power plants, standby diesel facilities, and grid-stabilisation equipment.<\/p>\n<\/div>\n

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\ud83c\udfed<\/p>\n

Heavy Manufacturing<\/p>\n

Conveyor, mixer, and extruder drives in steel, cement, and aggregate processing facilities across the West Midlands and North East.<\/p>\n<\/div>\n

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\ud83c\udf0a<\/p>\n

Marine & Offshore<\/p>\n

Auxiliary pump systems on North Sea support vessels and offshore platform utility drives, where SS316 variants provide reliable corrosion resistance.<\/p>\n<\/div>\n

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\ud83c\udf7d\ufe0f<\/p>\n

Food & Beverage<\/p>\n

Stainless steel YL couplings on mixer, conveyor, and bottling line drives in UK food factories requiring full washdown compliance.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Customer Success Story<\/h2>\n
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STUDIU DE CAZ<\/div>\n
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Severn Water Treatment Solutions Ltd \u2014 West Midlands, United Kingdom<\/p>\n

Industry: Municipal Water & Wastewater Treatment \u00b7 Application: High-Duty Centrifugal Pump Drive Shafts<\/p>\n<\/div>\n<\/div>\n

The challenge:<\/strong> Severn Water Treatment Solutions was operating sixteen centrifugal pump units at a regional treatment facility near Coventry, each driven by a 75 kW electric motor running at 1,480 rpm. Their incumbent rigid couplings \u2014 sourced from a domestic UK intermediary \u2014 were showing fatigue cracking at the bolt circle after approximately 18 months of continuous service. With planned downtime costing the facility upwards of \u00a34,500 per hour, unscheduled coupling failures were operationally and financially unsustainable. The procurement team needed an ISO-certified supplier able to deliver YL9 rigid flange couplings with tighter bore tolerances and verifiable material traceability against their supply-chain audit protocol.<\/p>\n

The solution:<\/strong> After reviewing the application data and shaft drawings, our engineering team recommended YL9 couplings machined from 45# carbon steel with a H7\/k6 bore fit, ground flange faces to Ra 1.6 \u00b5m, and a phosphate anti-corrosion coating appropriate for the humid pump-house environment. Material test certificates and dimensional inspection reports were issued with every batch. A consignment of 32 couplings was delivered to the Birmingham facility in under three weeks from order confirmation, including all supporting quality documentation.<\/p>\n

The outcome:<\/strong> Twenty-eight months after installation, zero coupling failures have been recorded across all sixteen pump units. The facility extended its planned maintenance interval for this component from 18 months to 30 months, releasing engineer time for higher-value asset care tasks. The procurement team has since specified our YL series as the sole-approved rigid coupling for a six-pump expansion project currently under construction at a second site in Staffordshire.<\/p>\n<\/div>\n

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What Our Clients Say<\/h3>\n
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\u2605\u2605\u2605\u2605\u2605\u2605<\/p>\n

“We sourced YL7 rigid flange couplings for our aggregate conveyor drives in Derbyshire. Lead times were well within what our domestic suppliers could offer, the dimensional accuracy was spot on, and material certificates arrived with the goods \u2014 no chasing required. The couplings have run continuously for over two years without a single issue.”<\/p>\n

\u2014 James Whitfield, Maintenance Manager<\/p>\n

Broadstone Aggregates Ltd, Derbyshire, UK<\/p>\n<\/div>\n

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\u2605\u2605\u2605\u2605\u2605\u2605<\/p>\n

“We needed stainless YL11 couplings for a North Sea platform utility pump project, with keyway dimensions outside the standard catalogue. HZPT turned around a custom quotation inside 24 hours, confirmed the specification in a single drawing revision, and delivered on schedule. The quality documentation met our client’s DNV requirements without exception.”<\/p>\n

\u2014 Lars Eriksen, Senior Mechanical Engineer<\/p>\n

NordSea Technical Solutions, Aberdeen, Scotland<\/p>\n<\/div>\n

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\u2605\u2605\u2605\u2605\u2605\u2605<\/p>\n

“As an OEM manufacturer of industrial blowers in Birmingham, we build torque-sensitive drive trains where every component counts. The YL5 rigid flange couplings from HZPT are machined to tighter tolerances than anything else we have benchmarked at a comparable price point. They are now written into our approved parts list across the entire product range.”<\/p>\n

\u2014 Sarah Thornton, Product Design Lead<\/p>\n

PrecisionFlow Engineering Ltd, Birmingham, UK<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Manufactured by HZPT \u2014 Your Custom Coupling Partner<\/h2>\n
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\"Cuplare\"<\/div>\n<\/div>\n

HZPT occupies a 55-mu manufacturing campus in Hangzhou, China, with a 12,000 m\u00b2 production workshop housing 108 dedicated sets of equipment \u2014 CNC lathes, machining centres, coordinate measuring machines, CO\u2082 welding systems, cutting lines, and coating facilities. Over two decades of cuplare<\/a> manufacturing experience are embedded in the institutional knowledge of the production team, and the facility has held ISO9001 certification continuously through multiple audit cycles. Today, HZPT exports to more than 40 countries, with a growing base of UK and European repeat customers in the power, water, and mining sectors who value the combination of competitive pricing, engineering expertise, and documented quality assurance that a direct manufacturer relationship provides.<\/p>\n

Noastre product customisation service<\/strong> is a genuine differentiator that sets HZPT apart from catalogue-only distributors. Whether you need a non-standard bore to fit a legacy shaft, a modified flange PCD to match existing bolt patterns on an ageing installation, a special phosphate or electroless nickel coating for a corrosive environment, or a fully bespoke material grade to satisfy a project specification, our engineering team can work from your drawing, your dimensions, or simply a description of the application. We have developed custom rigid flange couplings for UK clients across nuclear decommissioning support facilities, tidal power test rigs, high-speed bottling lines, and specialised mining equipment. Typical custom lead times run four to six weeks from drawing approval, with remote engineering support available throughout via video call. Our team supports UK procurement professionals from initial technical review right through to installation guidance.<\/p>\n

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20+<\/p>\n

Years manufacturing couplings<\/p>\n<\/div>\n

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108<\/p>\n

Sets of production equipment<\/p>\n<\/div>\n

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12,000<\/p>\n

m\u00b2 production workshop<\/p>\n<\/div>\n

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40+<\/p>\n

Countries served globally<\/p>\n<\/div>\n<\/div>\n

Get a Quote for Custom YL Couplings \u2192<\/a><\/div>\n<\/div>\n

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\u00centreb\u0103ri frecvente<\/h2>\n

Common questions from UK engineers and procurement professionals about YL type rigid flange couplings.<\/p>\n

\nWhat is the price of a YL type rigid flange coupling for UK industrial buyers, and how can I get a competitive quote from a trusted supplier?<\/summary>\n
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Pricing depends on model size, bore diameter, material grade, and order quantity. Standard HT250 units in the YL3\u2013YL7 range are cost-effective even for moderate quantities, while custom-bored or steel YL9\u2013YL14 couplings carry a premium reflecting the additional CNC machining involved. To receive an accurate quotation for your specific application, email sales@gear-type-coupling.top<\/a> with the model size, bore diameter, keyway dimensions, required quantity, and your delivery address in the United Kingdom. We respond to UK-originated enquiries within one business day in most cases.<\/p>\n<\/div>\n<\/details>\n

\nHow do I select the correct YL rigid flange coupling size for a centrifugal pump or compressor shaft in a UK power generation facility?<\/summary>\n
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Coupling selection starts with three key parameters: the transmitted design torque (Nm), the shaft speed (rpm), and the shaft diameter on each side of the drive. Calculate the design torque by multiplying the motor’s rated torque by a service factor \u2014 typically 1.5 to 2.0 for steady pump duty, rising to 2.5 or higher for compressors with shock starts. Match this design torque against the nominal torque values in the YL selection table, ensure the bore range covers both shaft diameters, and check that the maximum coupling speed exceeds your operating speed. If you share your motor nameplate data and shaft drawing with our engineering team, we will confirm the correct model selection and bore specification for you at no charge.<\/p>\n<\/div>\n<\/details>\n

\nWhere can I find a reliable rigid flange coupling supplier in the UK who offers custom bores, material certificates, and fast delivery?<\/summary>\n
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HZPT, trading through gear-type-coupling.top, is a direct manufacturer supplying UK procurement teams with standard and custom YL series couplings from its Hangzhou production facility. As a manufacturer \u2014 not an intermediary \u2014 we can confirm custom bore specifications quickly, issue material test certificates and dimensional inspection reports with every batch, and typically despatch within four to six weeks of drawing approval for custom orders. Standard catalogue items are available for air-freight despatch to UK addresses, with typical transit times of five to seven working days.<\/p>\n<\/div>\n<\/details>\n

\nWhat is the difference between a rigid flange coupling and a flexible jaw coupling, and when should a UK maintenance engineer specify each type?<\/summary>\n
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A rigid flange coupling transmits torque through an all-metal joint with zero torsional compliance \u2014 ideal where shaft alignment is precise and positioning accuracy is critical, such as on generator sets, precision test rigs, or high-speed blower drives. A flexible jaw coupling incorporates a compliant polyurethane or rubber spider element that accommodates small degrees of angular, parallel, or axial misalignment and absorbs shock and vibration. Choose a rigid coupling when shaft alignment can be confirmed with laser or dial-gauge tools and torsional stiffness is operationally important. Choose a flexible coupling when installation conditions introduce unavoidable misalignment, vibration damping is needed, or the drive experiences frequent start-stop shock loads.<\/p>\n<\/div>\n<\/details>\n

\nHow should a YL type rigid flange coupling be correctly installed and aligned on a North Sea offshore pump application?<\/summary>\n
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Before mating the flanges, verify shaft alignment with a laser alignment tool or dial test indicator (DTI). Radial runout measured at the flange face should not exceed 0.02 mm TIR for operational speeds above 1,500 rpm. Hub installation should use thermal expansion or hydraulic press methods matched to the specified interference fit \u2014 never impact with a hammer. Once flanges are mated, torque bolts incrementally in a cross-star pattern to the manufacturer’s specified value, and recheck alignment after initial torquing. In offshore and coastal environments, use a corrosion-resistant bolt lubricant, specify SS316 hubs, and schedule a torque check at the first planned maintenance visit after six months in service.<\/p>\n<\/div>\n<\/details>\n

\nWhich material is the better choice for a rigid coupling on a washdown food-processing line in a UK factory \u2014 cast iron, carbon steel, or stainless steel?<\/summary>\n
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For food processing, dairy, beverage production, and pharmaceutical applications where equipment is routinely cleaned with water, steam, or chlorinated agents, neither standard grey cast iron nor unprotected carbon steel is appropriate without surface treatment. The preferred choice for UK food-industry applications is our SS316 stainless steel coupling variant, which resists pitting corrosion from hypochlorite-based cleaning products and meets hygienic design expectations under UK Food Standards Agency guidance. Where budget constraints apply, a 45# steel coupling with electroless nickel plating offers useful corrosion resistance at lower cost for environments that use less aggressive cleaning regimens.<\/p>\n<\/div>\n<\/details>\n<\/div>\n

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Ready to Source YL Rigid Flange Couplings for Your UK Project?<\/h2>\n

Send us your shaft data and application requirements. Our engineers will recommend the right model, confirm bore availability, and issue a competitive quotation \u2014 typically within 24 hours for UK-based enquiries.<\/p>\n

Get a Quote Now<\/a><\/p>\n

\u2709 sales@gear-type-coupling.top \u00a0|\u00a0 YL Type Rigid Flange Couplings \u00a0|\u00a0 ISO9001:2015 Certified \u00a0|\u00a0 Custom Bore Solutions Available<\/p>\n

editat de gzl<\/p>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

YL rigid flange coupling \u2014 bolted, zero-backlash shaft connector. HT250 cast iron (YL3\u20137) or 45# carbon steel (YL9+); SS316 option. ISO9001. Custom bore & keyway. 63\u201310,000 Nm.<\/p>","protected":false},"featured_media":2504,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[5933],"product_tag":[],"class_list":{"0":"post-2362","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-coupling","8":"first","9":"instock","10":"shipping-taxable","11":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/gear-type-coupling.top\/ro\/wp-json\/wp\/v2\/product\/2362","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gear-type-coupling.top\/ro\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/gear-type-coupling.top\/ro\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/gear-type-coupling.top\/ro\/wp-json\/wp\/v2\/comments?post=2362"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/gear-type-coupling.top\/ro\/wp-json\/wp\/v2\/media\/2504"}],"wp:attachment":[{"href":"https:\/\/gear-type-coupling.top\/ro\/wp-json\/wp\/v2\/media?parent=2362"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/gear-type-coupling.top\/ro\/wp-json\/wp\/v2\/product_brand?post=2362"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/gear-type-coupling.top\/ro\/wp-json\/wp\/v2\/product_cat?post=2362"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/gear-type-coupling.top\/ro\/wp-json\/wp\/v2\/product_tag?post=2362"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}