Description
The SWP-F is the long big flex variant of the SWP universal joint coupling family — designed for applications with the largest combination of axial flex and angular misalignment in the SWP range. The long, flexible cross shaft handles total misalignment angles up to 90 degrees while maintaining the high torque ratings of the SWP family. Single-piece body design simplifies installation; two cross-shaft support bearings distribute loading for extended service life. This industrial shaft coupling variant is the engineering default for agricultural equipment and construction machinery with the most demanding articulation requirements.
SWP-F Specifications and Dimensional Range
The SWP-F range covers gyration diameters from 225 mm to 600 mm. Maximum operating angle is 90 degrees through the double-joint geometry combined with the long flexible cross shaft. Torque ratings match the equivalent SWP-A flex variant at any given gyration diameter. The single-piece long body design provides the largest combined flex envelope in the SWP range.
| Model | Gyration Ø D (mm) | Nominal Torque Tn (kN·m) | Fatigue Tn Tf (kN·m) | Flex Angle β (°) | Bore D₂ (mm) | Lmin (mm) |
|---|---|---|---|---|---|---|
| SWP225F | 225 | 63 | 31.5 | ≤90° | 40–125 | 880 |
| SWP250F | 250 | 90 | 45 | ≤90° | 50–140 | 960 |
| SWP285F | 285 | 160 | 80 | ≤90° | 60–155 | 1080 |
| SWP315F | 315 | 250 | 125 | ≤90° | 65–160 | 1180 |
| SWP350F | 350 | 400 | 200 | ≤90° | 80–185 | 1300 |
| SWP390F | 390 | 560 | 280 | ≤90° | 90–200 | 1400 |
| SWP450F | 450 | 800 | 400 | ≤90° | 100–230 | 1560 |
| SWP500F | 500 | 1,000 | 500 | ≤90° | 120–260 | 1700 |
| SWP600F | 600 | 1,600 | 800 | ≤90° | 160–300 | 2000 |
The long flexible cross shaft is supported by two intermediate bearings that distribute loading and prevent shaft whip at high operating speeds and large flex angles. The single-piece body design eliminates the field-assembly complexity of multi-component variants.
SWP-F Long Big Flex Type Universal Joint Coupling – double universal joint with large flex angle capability. Ever Power Flange Couplings Australia Ltd.
What Distinguishes the SWP-F from Other Universal Joint Types
The SWP-F is the engineering choice for applications requiring the largest combined flex envelope — substantial axial compliance combined with extreme angular misalignment up to 90 degrees. The long, flexible cross shaft accommodates the combined geometric variation that simpler variants cannot handle. Two cross-shaft support bearings distribute the loading that the long shaft would otherwise concentrate at the end joints.
Agricultural equipment with extreme articulation, construction machinery with multi-axis driveline geometry, and certain industrial applications with combined high-flex high-angle requirements all match the SWP-F profile. The single-piece body design simplifies field installation compared to multi-component variants — the assembly arrives at site ready to bolt onto the existing shaft flanges.
Single-Piece Design Benefits Field Service
The single-piece long body construction means the entire coupling assembly is manufactured and tested as one unit, eliminating the field-assembly bolt torque sequence that multi-component variants require. Field installation reduces to flange-to-shaft connections only — typically 1 to 2 hours for an experienced maintenance crew. The factory-tested single-piece design also eliminates the risk of incorrect field assembly that can compromise joint geometry on multi-component variants.
Construction and Material Specification
Material specification follows the SWP family standard: 35CrMo alloy steel forging, full quench-and-temper heat treatment, induction-hardened journals to HRC 58-64. Two intermediate support bearings on the long flexible cross shaft distribute loading that would otherwise concentrate at the end joints.
All bearings are sealed and pre-lubricated at assembly. The single-piece body is dimensionally inspected and torque-tested before shipment to confirm correct geometry. Flange interfaces follow standard industrial conventions. Optional surface treatments for agricultural and construction equipment service are available.
Double universal joint design accommodates up to 90 degrees of misalignment. Suitable for the most demanding articulated driveline applications.
Extended length provides maximum flex envelope. Two intermediate support bearings distribute loading and prevent shaft whip at high speed.
Factory-assembled and tested as one unit. Eliminates field assembly complexity. Field installation reduces to flange-to-shaft connections only.
Distributes loading along the length of the flexible cross shaft. Prevents shaft whip at high operating speeds. Reduces wear concentration at end joints.
Same material specification as the SWP family. Induction-hardened journals on all bearing surfaces.
Dimensional inspection and torque test before shipment. Eliminates field-assembly geometry errors.
Industrial Applications Across Heavy Industry
SWP-F applications cluster around the most demanding articulated driveline applications across agricultural and construction equipment, with selected use in industrial drives requiring the combined flex envelope.
Agricultural Equipment with Extreme Articulation
Large self-propelled agricultural machinery — combine harvesters, sugar cane harvesters, large forage harvesters — operate with multiple articulated joints in the driveline geometry. The SWP-F accommodates the combined angular and axial variation that these complex driveline geometries impose. The high torque rating supports the heavy primary drives on these machines.
Construction Machinery and Heavy Equipment
Large construction equipment with multi-axis articulated drivelines — articulated dump trucks, large wheel loaders with all-wheel drive, articulated tractors — specifies SWP-F for the combination of large operating angle and high torque rating. Mining haul truck driveline applications and certain heavy industrial vehicle drivelines also use this heavy duty shaft coupling variant.
SWP-F single-piece long body design with two cross-shaft supports for large flex angle service.
Selecting the Correct SWP-F Size for Your Drive
Choose SWP-F when the application requires the largest combined flex envelope in the SWP range — total angular misalignment up to 90 degrees combined with substantial axial compliance, high torque rating, and field-service maintainability. The single-piece body design simplifies installation; the two support bearings distribute loading for extended service life.
Verify operating angles, axial movement range, and torque rating against the published specifications. Specify the appropriate surface treatments and bearing seal grades for the operating environment.
Installation, Operation, and Maintenance Best Practice
Installation is simplified by the single-piece body design — the assembly arrives ready to bolt onto existing shaft flanges. Field installation reduces to flange-to-shaft connections only.
Confirm existing shaft flange dimensions match SWP-F hub specifications. Verify available installation envelope accommodates the long body length.
Verify the factory dimensional inspection certificate is supplied with the shipment. Inspect the assembly for shipping damage. Verify all support bearings rotate smoothly.
Lift coupling into position using the supplied lifting eyes. Engage pilot register of each hub with corresponding shaft flange. The single-piece body design means no field assembly required.
Install all flange bolts in cross pattern. Torque to 30, 60, 100 percent of final value with calibrated wrench. Apply locking compound to bolt threads.
Articulate the driveline through its full range of motion. Confirm smooth operation through all positions including extreme angles. Any unusual resistance indicates installation error.
Run at progressively increasing speed through the full operating envelope. Monitor vibration and bearing temperature for first 50 hours. Inspect bearings, seals, and bolt torque at first scheduled maintenance interval.
OEM Cross-Reference and Order Specification
Cross-reference is available for Voith Turbo long-flex large-angle cardan shafts, Rexnord articulated double-joint universal couplings, and major agricultural/construction equipment OEM driveshaft specifications. Provide OEM model code, gyration diameter, nominal torque, operating angle range, and flange interface dimensions.
For specialised agricultural and construction equipment applications, custom intermediate body lengths and non-standard support bearing arrangements are available from our Sydney engineering team within standard production lead times.
Why Choose Ever Power Australia
Ever Power Flange Couplings Australia Ltd. supplies SWP-F couplings for the most demanding Australian agricultural and construction equipment applications from our Sydney warehouse. Single-piece factory-tested assemblies arrive ready for direct installation, reducing field commissioning time. Spare support bearings and field-service kits are stocked at Condell Park.
Ever Power manufacturing facility — ISO 9001 certified, 12,000 m², 108 dedicated coupling machines, 20+ years of production experience.
Every order placed with our Sydney team is backed by full material traceability, dimensional inspection certificates on request, and direct access to the engineers who specified, machined, and packed your coupling. We do not subcontract technical support — when you phone +61 2 9708 3322 during NSW business hours, you reach the people who actually know the product.
Frequently Asked Questions
Quick answers from our Sydney technical team. Contact us for application-specific guidance.
1. When should I specify SWP-F over SWP-D or SWP-E? +
2. What do the two cross-shaft support bearings do? +
3. Is the SWP-F single-piece body fully sealed? +
4. Can I retrofit an SWP-F in place of a worn OEM driveshaft? +
5. How quickly can I receive an SWP-F from your Sydney warehouse? +
Request a Quote — Sydney NSW Stock
Tell us your motor power, shaft diameter, and operating environment. Our New South Wales coupling team confirms availability and pricing within one business day, with same-day dispatch on standard sizes from Condell Park.
Ever Power Flange Couplings Australia Ltd. · 27 Harley Crescent, Condell Park NSW 2200 · [email protected]
