SWC285 Spline Shaft – Forged 40Cr Steel, 34 Teeth, Module 4, Induction-Hardened HRC50-55

Factory Direct | Forged 40Cr Steel | 34 Teeth | Module 4 | Quenched & Tempered HB250-300 | Induction-Hardened Splines HRC50-55, 4-6mm Case Depth | SWC285 Series | OEM Customizable

The Apexcoupling SWC285 Spline Shaft is a high-precision replacement component designed for SWC series cardan shafts and universal joint drive systems. Manufactured from premium forged 40Cr alloy steel with a quenched and tempered heat treatment achieving HB250-300 hardness, this spline shaft delivers exceptional strength, wear resistance, and long service life in demanding heavy industrial applications.

The spline shaft (also known as a spline bar or telescopic drive shaft spline) is the male spline component that slides inside the spline sleeve to form the telescopic spline assembly. As the connected machinery operates, thermal expansion, installation tolerances, and mechanical movement cause the distance between shaft flanges to change. The spline shaft slides smoothly within the spline sleeve, allowing the cardan shaft to compensate for these axial variations while maintaining continuous torque transmission. Featuring a 34-tooth, module 4 spline profile with induction-hardened spline channels (HRC50-55, 4-6mm case depth), this spline shaft ensures smooth, backlash-free engagement with the mating spline sleeve. The SWC285 spline shaft is a direct replacement for worn components in SWC285 series cardan shafts, with full OEM customization support for custom dimensions and specifications.

✅ Premium forged 40Cr steel – high strength, excellent wear resistance, and durability. Quenched & tempered HB250-300 – optimal hardness and toughness. 34 teeth, module 4 – precision spline profile for smooth engagement. Induction-hardened splines HRC50-55, 4-6mm case depth – wear-resistant surface, extended service life. SWC285 series compatibility – direct replacement for worn spline shafts. OEM customization – custom dimensions and specifications available. ISO9001 certified manufacturing – quality assured.

SWC285 Spline Shaft – Detailed Specifications

📐 Custom dimensions and specifications available upon request. Contact our engineering team for custom sizing.

Product Structure

1. Forged 40Cr Steel Body – Premium alloy steel, forged for optimal grain structure and material density, ensuring high strength and durability.

2. 34-Tooth Spline Profile (Module 4) – Precision-machined spline teeth for smooth engagement with the mating spline sleeve, minimizing backlash and wear.

3. Quenched & Tempered Heat Treatment – HB250-300 hardness provides an optimal balance of wear resistance and toughness for demanding industrial applications.

4. Induction-Hardened Spline Channels – HRC50-55 hardness, 4-6mm case depth – wear-resistant surface prevents notched wear and extends service life.

5. Telescopic Sliding Design – Allows axial length adjustment to compensate for thermal expansion, installation tolerances, and mechanical movement during operation.

💡 How it works: The SWC285 spline shaft is the male spline component that slides inside the spline sleeve to form the telescopic spline assembly. As the connected machinery operates, thermal expansion, installation tolerances, and mechanical movement cause the distance between shaft flanges to change. The spline shaft slides smoothly within the spline sleeve, allowing the cardan shaft to compensate for these axial variations while maintaining continuous torque transmission. The induction-hardened spline channels (HRC50-55, 4-6mm case depth) provide a wear-resistant surface that prevents notched wear and extends service life. The forged 40Cr steel construction ensures the strength and fatigue resistance required for heavy-duty industrial applications. The quenched & tempered heat treatment (HB250-300) provides the optimal balance of hardness and toughness to withstand shock loads and prevent premature wear.

Spline Shaft vs Spline Sleeve – Understanding the Difference

The SWC cardan shaft uses a matched spline pair to enable telescopic movement:

💡 Both components are required to form a functional telescopic spline assembly. The spline sleeve and spline shaft work together to provide smooth axial compensation during operation.

Product Features & Advantages

Applications

The SWC285 spline shaft is used across a wide range of heavy industrial sectors:

• Metallurgical Equipment – Rolling mills, continuous casting machines, straighteners

• Mining Machinery – Crushers, ball mills, conveyors, feeders

• Construction Machinery – Cranes, excavators, concrete pump trucks

• Shipbuilding Industry – Propulsion shaft systems, deck machinery

• Petrochemical Industry – Pump sets, compressors, mixing equipment

• Paper Machinery – Roller drive connections

• Power Generation – Turbine and generator connections

• Heavy Industrial Drives – General high-torque power transmission

Why Choose Apex Coupling for SWC285 Spline Shafts?

Customization Options

FAQ

Q: What is a spline shaft?
A: A spline shaft (also called a spline bar or telescopic drive shaft spline) is the male spline component that slides inside the spline sleeve to form a telescopic spline assembly. In SWC cardan shafts, it compensates for axial displacement during operation.

Q: What material is used for the SWC285 spline shaft?
A: The SWC285 spline shaft is manufactured from forged 40Cr alloy steel – offering high strength, excellent wear resistance, and durability.

Q: What is the heat treatment?
A: The spline shaft undergoes quenching and tempering to achieve HB250-300 hardness – providing an optimal balance of strength and toughness. The spline channels are induction-hardened to HRC50-55 with a 4-6mm case depth for superior wear resistance.

Q: What is the spline specification?
A: The spline profile features 34 teeth with a module of 4.

Q: What are the dimensions of the SWC285 spline shaft?
A: Outer diameter: 142mm, overall length: 360mm.

Q: What SWC series is this compatible with?
A: This spline shaft is compatible with SWC285 series cardan shafts. Custom sizes are available for other SWC series.

Q: What is the difference between a spline shaft and a spline sleeve?
A: The spline shaft is the external spline component (male) that slides inside the spline sleeve (internal spline, female). Together they form the telescopic spline assembly that allows axial length adjustment.

Q: Is the spline shaft a replacement part?
A: Yes. The spline shaft is a replacement component for worn or damaged spline shafts in SWC285 cardan shafts.

Q: Can I get a custom spline shaft?
A: Yes. We offer OEM customization – custom dimensions, materials, and specifications available.

Q: What is the warranty?
A: 1 Year – quality assured.

Request a Quote

Send us your SWC model (SWC285), required dimensions, quantity, and any customization requirements. Our engineers will provide a quotation within 24 hours.