Description
The SWP-D is the long-body without-flex flanged-hub variant of the SWP universal joint coupling family — combining the extreme operating angle capability of double-joint geometry with the rigid construction of without-flex types and the field-removability of flanged hub interfaces. The long body between the two Hooke’s joints provides extended parallel offset capability for installations where the offset distance is substantial. This heavy duty shaft coupling handles agricultural, construction, and mining equipment drivelines where extreme operating angles are routine.
SWP-D Specifications and Dimensional Range
The SWP-D range covers gyration diameters from 160 mm to 700 mm. Maximum operating angle reaches 90 degrees through the double-joint geometry. Torque ratings match the equivalent SWP-A and SWP-B sizes. The long body extends parallel offset capability proportionally — typical offset values reach 400 mm on the larger size classes.
| Model | Gyration Ø D (mm) | Nominal Torque Tn (kN·m) | Fatigue Tn Tf (kN·m) | Flex Angle β (°) | Bore D₂ (mm) | Lmin (mm) |
|---|---|---|---|---|---|---|
| SWP160D | 160 | 16 | 8.0 | ≤90° | 20–95 | 390 |
| SWP225D | 225 | 63 | 31.5 | ≤90° | 40–125 | 520 |
| SWP285D | 285 | 160 | 80 | ≤90° | 60–155 | 640 |
| SWP315D | 315 | 250 | 125 | ≤90° | 65–160 | 700 |
| SWP350D | 350 | 400 | 200 | ≤90° | 80–185 | 780 |
| SWP450D | 450 | 800 | 400 | ≤90° | 100–230 | 920 |
| SWP550D | 550 | 1,250 | 625 | ≤90° | 130–280 | 1100 |
| SWP700D | 700 | 2,500 | 1,250 | ≤90° | 200–350 | 1380 |
The long body provides extended parallel offset capability for installations where input and output shafts are substantially offset. The 90-degree operating angle through double-joint geometry handles articulated driveline applications including agricultural PTO drives and construction machinery.
SWP-D Long Without Flex Type Universal Joint Coupling – double joint, long body, rigid flanged construction. Ever Power Flange Couplings Australia Ltd.
What Distinguishes the SWP-D from Other Universal Joint Types
The SWP-D combines three engineering choices: long body, without-flex construction, and flanged hub connection. The double-joint geometry with extended intermediate body delivers both extreme operating angles (up to 90 degrees total) and substantial parallel offset capability — proportional to body length and joint angle. The without-flex rigid construction maintains constant length throughout operation, suitable for applications where shaft-centre distance is dimensionally stable.
Agricultural equipment driveshafts, construction machinery articulated drivelines, mining equipment articulated joints, and certain automotive driveshaft applications all match the SWP-D profile. The combination of large operating angle, rigid construction, and flanged hub interface is the engineering default for these applications where the geometry varies during operation but the shaft connections are dimensionally fixed.
Double-Joint Geometry for Articulated Drives
Articulated drivelines — found on agricultural tractors with implements, construction equipment with articulated booms, and mining equipment with articulated steering — require the input and output shafts to operate at angles that vary continuously during work. The double-joint geometry of the SWP-D handles these variable angles while transmitting full torque. The equal-and-opposite joint angle arrangement delivers constant-velocity output despite the varying input angle.
Construction and Material Specification
Material specification follows the SWP family standard: 35CrMo alloy steel forging, full quench-and-temper heat treatment, induction-hardened trunnion journals to HRC 58-64. Four trunnion crosses (two per Hooke’s joint) are supported on sealed needle roller bearings. The extended intermediate body is a forged-and-machined rigid component.
Sealed needle roller bearings are pre-lubricated at assembly. The flanged hub face follows the standard industrial flange convention. For agricultural and construction equipment applications, optional surface treatments (phosphating, zinc plating) protect against the corrosive environments these applications encounter.
Double Hooke’s joint geometry handles total operating angles up to 90 degrees. Each joint operates at half the total angle. Suitable for articulated drivelines.
Extended intermediate body between two joints provides substantial parallel offset capability. Typical offset values reach 400 mm on larger size classes.
No telescoping element. Maximum torsional stiffness. Suitable for articulated installations with dimensionally fixed shaft connections.
Field-removable installation. Optional agricultural/construction equipment surface treatments. Standard industrial flange interface.
Four trunnion crosses in induction-hardened 35CrMo alloy steel. Sealed needle roller bearings pre-lubricated at assembly.
Designed for agricultural, construction, and mining environments. Optional surface treatments enhance corrosion resistance in field-service applications.
Industrial Applications Across Heavy Industry
SWP-D applications focus on articulated drivelines and extreme-angle drives across agricultural, construction, mining, and certain automotive sectors.
Agricultural Equipment Drivelines
Agricultural tractor power take-off (PTO) connections to implements operate with continuously varying angles as the implement articulates during work. Heavy harvester drivelines, large baler drives, and self-propelled agricultural machinery with articulated steering all specify SWP-D variants for the combination of high torque, large operating angle, and rigid construction. The flanged hub interface supports the field-service maintenance routines that agricultural equipment requires.
Construction and Mining Articulated Drives
Construction machinery with articulated booms — excavators, articulated dump trucks, large loaders — uses SWP-D couplings on driveline shafts where the geometry varies continuously during work. Mining equipment articulated drivelines and transfer cases similarly use this industrial shaft coupling variant. Optional automotive driveshaft and transfer case configurations are available for specific OEM applications.
SWP-D long-body rigid construction – two bending joints for up to 90 degree operating angle.
Selecting the Correct SWP-D Size for Your Drive
Choose SWP-D when the application requires double-joint geometry for extreme operating angles, rigid construction for dimensional stability, and field-removable flanged hub installation. Calculate the maximum total operating angle and verify both joints will operate at equal-and-opposite angles within the 45-degree per-joint envelope.
Verify foundation rigidity and shaft connection rigidity will maintain the design shaft-centre distance throughout operation. For agricultural and construction applications, specify the appropriate surface treatments and bearing seal grades for the operating environment.
Installation, Operation, and Maintenance Best Practice
Installation requires attention to maintaining equal-and-opposite joint angles throughout the operating envelope. Articulated drives must be checked through their full range of motion to confirm both joints articulate within their rated envelopes.
Map the full range of operating angles for the articulated driveline. Verify both joints will operate within their 45-degree per-joint envelope across the full range. Confirm equal-and-opposite joint angle relationship throughout.
Verify existing shaft flange dimensions match SWP-D hub specifications. For agricultural and construction equipment, confirm the appropriate surface treatments and seal grades are specified.
Lift coupling into position. Engage pilot register of each hub with corresponding shaft flange. Verify intermediate body sits in correct orientation.
Install all flange bolts in cross pattern. Torque to 30, 60, 100 percent of final value. Apply locking compound to bolt threads — vibration-resistant joint integrity is critical for field-service equipment.
Articulate the driveline through its full range of motion. Confirm smooth operation through all positions. Any binding or unusual resistance indicates geometric setup error requiring correction.
Run at progressively increasing speed through full operating envelope. Monitor vibration and bearing temperature. Inspect bearings, seals, and bolt torque at first scheduled maintenance interval — sooner for severe-service applications.
OEM Cross-Reference and Order Specification
Cross-reference is available for Voith Turbo articulated cardan shafts, Rexnord double-joint universal couplings, and major agricultural/construction equipment OEM driveshaft specifications. Provide OEM model code, gyration diameter, nominal torque, total operating angle, parallel offset, and flange interface dimensions for direct equivalent confirmation.
For agricultural, construction, and mining applications, specify the appropriate surface treatments (phosphating, zinc plating, or specified coatings), bearing seal grades, and lubricant types at order so the appropriate documentation and field-service kit are supplied with the shipment.
Why Choose Ever Power Australia
Ever Power Flange Couplings Australia Ltd. supplies SWP-D couplings for Australian agricultural, construction, and mining equipment from our Sydney warehouse. Field-service kits, agricultural-grade surface treatments, and OEM cross-reference work are all standard services from our in-house engineering team. Custom intermediate body lengths for non-standard articulated drivelines are handled within standard production lead times.
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-D over SWP-C? +
2. How is the 90-degree operating angle achieved? +
3. Is the SWP-D suitable for agricultural PTO applications? +
4. Can the SWP-D handle the vibration of construction equipment? +
5. How quickly can I receive an SWP-D 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]
