The SWP-B short telescopic universal joint coupling is a high-performance cardan shaft designed for heavy-duty industrial applications where axial space is limited. With its split bearing housing design and short body construction, it delivers the same torque capacity as longer models in a more compact package. This guide explains how the SWP-B works, its key advantages, and how to select the right model for your application.

1. What Is the SWP-B Universal Joint Coupling?

The SWP-B is a short telescopic universal joint coupling (cardan shaft) manufactured to the JB/T3241-1991 standard. Key features include:

• Short telescopic design – saves space in compact drivetrains

• Split bearing housing – allows easy bearing replacement without disassembling shafts

• High torque capacity – 16-1250 kN·m

• ≤10° axis angle – accommodates significant misalignment

• High transmission efficiency – up to 98.6%

💡 The SWP-B operates on the Hooke’s (universal) joint principle: a pair of flanged yokes joined by a precision-ground cross-spider carries high torque through shaft angular offsets.

2. SWP-B vs SWP-A – Key Differences

Both SWP-B and SWP-A are telescopic universal joints, but the SWP-B is optimized for space-constrained installations:

✅ Choose SWP-B when: Axial space is limited but you need the same torque capacity as the SWP-A.

3. Split Bearing Housing – The Maintenance Advantage

The split bearing housing is the defining feature of the SWP-B series:

4. How to Select the Right SWP-B Model

Step 1: Determine Your Torque Requirement

• Calculate the torque your application requires.

• Select a model with nominal torque ≥ your requirement.

• SWP-B series covers 16-1250 kN·m.

Step 2: Determine Rotating Diameter

• Choose a model with the appropriate rotating diameter (D).

• SWP-B series covers 160-640 mm.

Step 3: Determine Installation Length

• Measure available axial space.

• Select a model with Lmin ≤ your available space.

• Lmin ranges from 585 mm (SWP160B) to 2780 mm (SWP640B).

Step 4: Determine Telescopic Stroke

• Determine the required axial stroke.

• Standard stroke (S) ranges from 50-230 mm.

Step 5: Verify Axis Angle

• Measure the expected angular misalignment.

• SWP-B accommodates ≤10°.

Step 6: Consider Maintenance Access

• The split bearing housing design allows for easy maintenance in confined spaces.

5. Applications Where SWP-B Couplings Excel

6. Real‑World Example – Mining Conveyor Upgrade

A mining company was experiencing frequent downtime on underground conveyor drives due to coupling maintenance. The existing long couplings required disassembly of shafts for bearing replacement – a time-consuming process in confined spaces.

They switched to Apex Coupling SWP-B short telescopic universal joints (SWP350B, 350 mm rotating diameter, split bearing housing). Results:

• Maintenance time reduced – bearing replacement without shaft disassembly

• Space savings – short design fit in tight underground layouts

• Downtime reduced – faster repairs

• Service life extended – robust construction with high-grade materials

7. Installation & Maintenance Tips

1. Check alignment – Keep operating angles ≤10° for optimal performance.

2. Split bearing housing – Take advantage of the split design for easy bearing maintenance.

3. Lubricate regularly – Extends service life of bearings and cross shaft.

4. Check for wear – Inspect cross shaft, bearings, and spline periodically.

5. Telescopic stroke – Ensure the telescopic stroke (S) is within the specified range.

6. Bolt torque – Tighten connecting bolts to the specified torque.

8. Selection Checklist

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  Model: SWP160B to SWP640B – select based on torque and rotating diameter

• □ 

  Torque: 16-1250 kN·m – ensure it exceeds your requirement

• □ 

  Rotating diameter: 160-640 mm – match your equipment

• □ 

  Axis angle: ≤10° – verify your misalignment

• □ 

  Length: Lmin – match your available axial space

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  Stroke: S – match your axial displacement requirements

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  Maintenance: Split bearing housing – easy maintenance

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  Application: Mining, metallurgy, shipbuilding, petroleum, paper

9. Conclusion

The SWP-B short telescopic universal joint coupling from Apex Coupling offers the perfect combination of high torque capacity, compact design, and easy maintenance for heavy-duty industrial applications. With split bearing housing for simplified maintenance, 16-1250 kN·m torque capacity, ≤10° angular compensation, and JB/T3241-1991 compliance, it is the ideal solution for mining conveyors, crusher drives, metallurgical equipment, and compact industrial drivetrains.

👉 Need a short telescopic universal joint for your application? Contact us with your model, torque, and length requirements.