SWP-F 롱 빅 플렉스 타입 유니버설 조인트 커플링

90° Misalignment Tolerance

The double universal joint design accommodates extreme angular offset without sacrificing torque capacity or introducing harmful vibration into the drive train.

High Nominal Torque Range

Torque capacity scales from 16 kN·m on the SWP160F all the way to 1,250 kN·m on the SWP640F, covering light through extremely heavy-duty industrial drive applications.

Single-Piece Construction

The unified body design eliminates multiple joint interfaces, cutting installation time and providing a more predictable service interval for planned maintenance schedules.

Dual-Bearing Cross Shaft Support

Two precision bearings cradle the cross shaft, distributing radial forces symmetrically and reducing localised wear that would otherwise shorten coupling service life.

Low Noise & Low Vibration

Precision machining tolerances and carefully selected bearing grades keep operational noise well below typical industrial thresholds, meeting requirements for noise-sensitive plant environments.

High Transmission Efficiency

The SWP-F universal joint coupling transfers the vast majority of input power directly to the output shaft with minimal internal losses, contributing to overall system energy efficiency.

🔧 Material Composition

The body forgings are produced from alloy steel grades such as 42CrMo4, selected for their combination of high tensile strength (typically exceeding 900 MPa), toughness, and fatigue resistance. All bearing surfaces receive precision grinding and, where specified, case hardening to achieve a surface hardness in the 58–62 HRC range. Exposed external surfaces are treated with zinc phosphate primer followed by industrial epoxy paint to resist the humid, salt-laden atmosphere common in coastal UK industrial zones from Aberdeen to Portsmouth.

⚙ How It Works

The SWP-F universal joint coupling operates on the Cardan joint principle extended through a double-yoke configuration. Input torque enters the first yoke, passes through the cross-spider assembly, transfers into the intermediate elongated shaft section, then continues through a second cross-spider to the output yoke. This twin-joint geometry means angular velocity fluctuations generated at the first joint are largely cancelled by the second joint when both joint angles are equal, resulting in near-uniform output speed even at significant misalignment angles — a critical quality for precision process machinery.

🏭 Application Scenarios

In the UK agricultural sector, SWP-F couplings connect PTO-driven attachments on tractors operating over the uneven terrain of the Midlands and Scottish Highlands. In heavy construction, they link the hydraulic pump drives of crawler excavators where chassis flex creates continuous shaft misalignment. North Sea offshore supply vessels rely on these couplings to connect diesel engine outputs to deck winch gear boxes. Steel rolling mills and paper mills throughout England and Wales use larger SWP550F and SWP640F variants on primary drive lines handling sustained high-torque loads twenty-four hours a day.

★★★★★

“We fitted SWP285F units on our aggregate crusher drive six months ago. The noise drop alone was noticeable within the first week. We have not touched them since — exactly what we needed for our remote quarry site in the Peak District.”

— James H., Plant Engineer

Aggregates & Quarrying, Derbyshire, UK

★★★★★

“The customised bore diameter on the SWP390F units arrived perfectly machined to our drawing. Lead time was three weeks, which is impressive for bespoke parts. Our paper mill in Lancashire has been running without a single drive fault for over a year.”

— Sarah M., Maintenance Manager

Pulp & Paper Manufacturing, Lancashire, UK

★★★★★

“We operate a fleet of heavy self-propelled harvesters across the East Anglian flatlands. The SWP200F has held up through two full harvest seasons, including grain header changes with heavy crop loads. Very competitive price, good technical support.”

— Richard T., Fleet Operations Director

Arable Farming & Agricultural Contracting, Norfolk, UK

What is the price range of SWP-F universal joint couplings for UK industrial buyers, and how can I get a quote?

Unit pricing for the SWP-F universal joint coupling series varies based on model size, bore specification, surface treatment, and order quantity. Smaller models such as the SWP160F are competitively priced for light industrial budgets, while large-bore models like the SWP640F are priced for heavy industrial procurement. To receive a precise quote tailored to your UK project requirements, please email [email protected] with your model, required bore dimensions, quantity, and delivery location. Quotes are typically returned within one business day.

Which SWP-F coupling model should I select for a heavy-duty agricultural PTO drive application in the UK with frequent angular misalignment?

For agricultural PTO applications, the correct SWP-F model depends on the rated PTO power output and shaft diameter. Light tractors up to 100 hp typically pair well with SWP200F, while high-horsepower combine harvesters and heavy-duty forage machinery often require SWP250F or SWP285F depending on the gear ratio and operating torque. Our engineering team can recommend the right model once you provide the input torque, shaft diameter, and maximum operating angle. Contact us to discuss your specific machinery application.

How long does delivery to the UK typically take when ordering SWP-F couplings, and do you ship to Scotland, Wales, and Northern Ireland?

Standard catalogue models are usually available for despatch within 5–10 working days. Shipping by sea freight to UK ports (Felixstowe, Southampton, or Liverpool) typically adds 25–35 days from dispatch. Air freight options are available for urgent requirements, reducing transit to approximately 5–7 days. We serve all mainland UK regions including Scotland, Wales, and Northern Ireland, as well as offshore islands through standard forwarding agents. Please mention your delivery postcode when requesting a quote so we can include accurate freight costs.

Where can I find a reliable SWP-F universal joint coupling supplier who can also provide custom bore sizes for mining equipment in the UK?

gear-type-coupling.top is an established international supplier of SWP-F universal joint couplings with specific experience serving the UK mining, quarrying, and heavy plant sectors. Our factory offers full custom bore machining, meaning we can produce any bore diameter with keyway geometry to your drawing in either metric or imperial units. We have supplied coupling solutions to mineral processing operations in South Wales and coal handling facilities in County Durham. Email us your technical drawing or dimensional requirements to start the process.

What is the maximum torque capacity of the SWP-F coupling range, and how does it compare to standard universal joints used in UK construction machinery?

The top of the SWP-F range, the SWP640F, carries a nominal torque rating of 1,250 kN·m with a fatigue torque of 630 kN·m, making it one of the highest-capacity couplings in its class. By contrast, standard single-piece universal joints commonly found on medium construction equipment typically cap out between 50 and 200 kN·m. For large excavators, road milling machines, and heavy tunnelling equipment operating on UK infrastructure projects, the SWP-F series provides a meaningful torque headroom that prevents coupling failure under peak demand loads.

How do I correctly install and maintain the SWP-F long big flex type universal joint coupling to maximise its service life in a paper mill environment?

Installation begins with verifying that the shaft diameters match the specified D2 bore tolerance (H7) and that keyways are machined to the correct B×h dimension listed in the selection table. The coupling should be pressed or thermally expanded onto the shaft to avoid damaging the bore surface. During initial commissioning, the operating angle should be measured with a digital inclinometer to confirm it is within the specified β limit. For continuous-duty paper mill drives, we recommend greasing the cross-spider bearing assemblies every 500 hours of operation using EP2-grade lithium grease, and performing a visual inspection of the cross shaft for scoring or fretting corrosion every 2,000 hours. Full replacement intervals depend on load duty cycle but typically exceed 30,000 hours in correctly specified installations.