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WSP Extendable Universal Joint Coupling – Single/Double Spline, Telescopic Design, 42CrMo
Model Number
Check below, custom
- Phone : +86 13431039760
- Wechat : +86 13431039760
- Whatsapp : +86 13431039760
- Email : ella@apexcoupling.com
Product Description
WSP Extendable Universal Joint Coupling – Telescopic Spline Design, 42CrMo, 45° Angle
Factory direct | 42CrMo alloy steel | Telescopic/extendable design | 45° angle per joint | H7 bore | Keyway/hex/square hole options | OEM custom | JB/T5901-1991
The Apexcoupling WSP series is a telescopic (extendable) universal joint coupling designed for applications requiring both angular misalignment compensation and axial displacement capability. Featuring a spline connection that allows length adjustment, this coupling is ideal for connecting shafts with variable spacing. Manufactured from 42CrMo alloy steel with H7 precision bore, it delivers high strength, toughness, and fatigue resistance. Available with keyway, hexagon, or square hole options, the WSP series is the perfect solution for general motor applications requiring flexible shaft spacing.
✅ Extendable/telescopic design compensates for axial displacement while allowing up to 45° angular misalignment per joint.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Brand | Apexcoupling |
| Model Series | WSP (Extendable Universal Joint / Telescopic Spline Type) |
| Type | Flexible universal joint / cardan joint |
| Structure | Telescopic / extendable – single or double joint |
| Material | 42CrMo alloy steel – high strength, toughness, fatigue resistance |
| Heat Treatment | Quenched & tempered – excellent wear resistance |
| Surface Treatment | Black oxide (standard) |
| Maximum Angle Per Joint | 45° (limit) – 40° recommended for continuous operation |
| Finished Bore Tolerance | H7 |
| Bore Options | Keyway, hexagon hole, square hole, plain round |
| Speed Capability | Up to 1000 rpm (sliding bearing) / Up to 4000 rpm (needle bearing) |
| Rated Torque | 20.1 N·m (typical) – custom range available |
| Maximum Speed | 2000 RPM |
| Standard | JB/T5901-1991 |
| Feature | High torsional rigidity (高抗扭刚度) |
| Customized support | OEM (non-standard customization available) |
| Applicable Industries | General motors, packaging, textile, agricultural machinery, construction |
| Warranty | 1 Year |
| Place of Origin | Guangdong, China |
🔧 Custom bores, keyways, hexagon/square holes, lengths, and special designs available. Contact us with your specifications.
Product Structure & Features
Telescopic Spline Shaft – Allows axial length adjustment to accommodate variable shaft spacing .
Universal Joint Ends – Single or double joint design for angular misalignment up to 45°.
H7 Precision Bore – High concentricity, accurate shaft fit.
Keyway, Hexagon, or Square Hole – Customizable connection types.
💡 The telescopic design allows for compensation of axial displacement while the universal joint accommodates angular misalignment – making it ideal for applications with variable shaft spacing.
Design Principles – Telescopic Universal Joint Calculation
For WSP telescopic universal joints, the installation length L and travel X are calculated as follows :
Travel calculation: Xs = (Lmax – 2·L2 – B) / 2
Minimum length: Lmin ≥ (Lmax + 2·L + B) / 2
Maximum length: Lmax = Lmin + travel
Where:
L = total length
L2 = length of each joint
B = spline engagement length
X = axial travel
📐 Contact our engineering team for custom length calculations based on your application requirements.
Product Features & Advantages
| Advantage | Benefit |
|---|---|
| Telescopic Spline Design | Compensates axial displacement – accommodates variable shaft spacing |
| 42CrMo Alloy Steel | High strength, toughness, and fatigue resistance after heat treatment |
| 45° Angular Capacity | Each joint handles up to 45° – suitable for large angular misalignment |
| H7 Precision Bore | High concentricity, accurate shaft fit, reduces vibration |
| Multiple Bore Options | Keyway, hexagon hole, square hole, or plain hole – choose your connection type |
| JB/T5901-1991 Standard | Manufactured to established Chinese national standard |
| High Torsional Rigidity | Minimal angular deflection under load – maintains positioning accuracy |
| Low Backlash | Precision fit – suitable for reversing drives |
| OEM Customization | Custom lengths, bores, keyways, and spline specifications available |
Applications
General Motors – Standard motor-driven machinery with variable shaft spacing
Packaging Machinery – Equipment with adjustable roller positions
Textile Machinery – Spinning and weaving equipment with variable spacing
Agricultural Machinery – Farm equipment with telescoping drive shafts
Construction Equipment – Machines with adjustable components
Conveyor Systems – Variable length conveyor drives
Why Choose Apex Coupling for WSP Extendable Universal Joints?
| Advantage | Description |
|---|---|
| Factory Direct | Competitive B2B pricing – no middlemen |
| Premium 42CrMo Alloy Steel | High strength, toughness, and fatigue resistance |
| Telescopic Spline Design | Compensates axial displacement – flexible shaft spacing |
| 45° Angular Capacity | Large misalignment compensation |
| H7 Precision Bore | High concentricity, accurate shaft fit |
| JB/T5901-1991 Standard | Manufactured to established Chinese national standard |
| OEM Customization | Custom bores, keyways, hex/square holes, and lengths available |
FAQ
Q: What is a telescopic universal joint coupling?
A: A telescopic universal joint (also called an extendable or spline universal joint) combines a universal joint for angular misalignment with a spline connection for axial length adjustment. It allows for compensation of both angular and axial displacement .
Q: What is the difference between WSP and standard universal joints?
A: The WSP series features a telescopic spline design that allows the coupling length to be adjusted – accommodating variable shaft spacing and axial displacement. Standard universal joints have a fixed length .
Q: What is the maximum operating angle?
A: Each joint can operate up to 45° limit angle. For continuous operation, we recommend ≤40° to maximize bearing life.
Q: What materials are used?
A: The WSP series is manufactured from 42CrMo alloy steel – offering high strength, toughness, and excellent fatigue resistance after heat treatment.
Q: What is the bore tolerance?
A: Standard finished bore tolerance is H7 for precision shaft fit.
Q: What bore types can I get?
A: We offer keyway, hexagon hole, square hole, and plain round hole. Custom bore types available on request.
Q: How is the telescopic length calculated?
A: The installation length L and travel X are calculated based on the formula Xs = (Lmax – 2·L2 – B) / 2. Contact our engineering team for custom length calculations .
Q: What speeds can this coupling handle?
A: With sliding bearing – up to 1000 rpm. With needle bearing – up to 4000 rpm. Standard series rated at 2000 RPM.
Request a Quote
Send us your configuration (single/double), torque requirement, speed, length/travel range, bore type, and bearing type. Our engineers will recommend the optimal model and provide a quotation within 24 hours.
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