SWC Spline Sleeve – Forged 40Cr Steel, 20 Teeth, 2.5 Module, Heat-Treated HB220-250

Factory Direct | 40Cr Forged Steel | 20 Teeth | 2.5 Module | Quenched & Tempered HB220-250 | Precision-Machined | SWC120, SWC150, SWC180, SWC200, SWC225, SWC250, SWC285, SWC315 | OEM Customizable

The Apexcoupling SWC Spline Sleeve is a high-precision replacement component designed for SWC series cardan shafts and universal joint drive systems. Manufactured from premium 40Cr forged steel with a quenched and tempered heat treatment achieving HB220-250 hardness, this spline sleeve delivers exceptional wear resistance, dimensional stability, and long service life in demanding heavy industrial applications.

The spline sleeve (also known as a spline hub or internal spline coupling) is a critical component of the SWC cardan shaft’s telescopic assembly. It mates with the spline shaft (spline bar) to form a sliding spline connection that compensates for axial displacement during operation [1†L13-L15][4†L13]. Featuring a 20-tooth, 2.5 module spline profile, this sleeve is precision-machined to ensure smooth, backlash-free engagement with the mating spline shaft. Available for SWC120, SWC150, SWC180, SWC200, SWC225, SWC250, SWC285, and SWC315 series cardan shafts, with full OEM customization support for custom dimensions and specifications.

✅ Premium 40Cr forged steel – high strength, excellent wear resistance. Quenched & tempered HB220-250 – optimal hardness and toughness. 20 teeth, 2.5 module – precision spline profile for smooth engagement. Precision-machined – accurate fit, reduced backlash. SWC120 to SWC315 compatibility – comprehensive size coverage. OEM customization – custom dimensions and specifications available. ISO9001 certified manufacturing – quality assured.

SWC120 Spline Sleeve – Detailed Specifications

📐 Additional sizes and custom dimensions available upon request. Contact our engineering team for custom sizing.

SWC Spline Sleeve – Model & Size Availability

📐 Custom dimensions and specifications available. 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. 20-Tooth Spline Profile (2.5 Module) – Precision-machined spline teeth for smooth engagement with the mating spline shaft, minimizing backlash and wear.

3. Quenched & Tempered Heat Treatment – HB220-250 hardness provides an optimal balance of wear resistance and toughness for demanding industrial applications.

4. Precision-Machined Bore – Accurate inner diameter for secure fit with the spline shaft.

💡 How it works: The SWC spline sleeve is a critical component of the cardan shaft’s telescopic assembly. It mates with the spline shaft (spline bar) to form a sliding spline connection that accommodates axial displacement during operation [1†L13-L15][4†L13]. As the connected machinery operates, thermal expansion, installation tolerances, and mechanical movement cause the distance between shaft flanges to change. The spline sleeve slides smoothly along the spline shaft, allowing the cardan shaft to compensate for these axial variations while maintaining continuous torque transmission [1†L17-L18][4†L13]. The 20-tooth, 2.5 module spline profile ensures accurate torque transfer with minimal backlash, while the 40Cr forged steel construction provides the strength and wear resistance required for heavy-duty industrial applications [4†L8-L10]. The quenched & tempered heat treatment (HB220-250) provides the optimal balance of hardness and toughness to withstand shock loads and prevent premature wear [2†L19-L20].

Spline Sleeve vs Spline Shaft – 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 [1†L13-L15][4†L13].

Product Features & Advantages

Applications

The SWC spline sleeve 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 SWC Spline Sleeves?

FAQ

Q: What is a spline sleeve?
A: A spline sleeve (also called a spline hub or internal spline coupling) is a cylindrical component with internal spline teeth that mates with a spline shaft. In SWC cardan shafts, it forms a sliding spline connection that compensates for axial displacement during operation [1†L13-L15][4†L13].

Q: What material is used for the spline sleeve?
A: The spline sleeve is manufactured from 40Cr forged steel – a premium alloy steel offering high strength, excellent wear resistance, and durability [2†L20].

Q: What is the heat treatment?
A: The spline sleeve undergoes quenching and tempering to achieve HB220-250 hardness – providing an optimal balance of wear resistance and toughness [2†L19-L20].

Q: What are the dimensions of the SWC120 spline sleeve?
A: Outer diameter: 76mm, inner diameter: 65mm, length: 154mm, center height: 52.5mm, 20 teeth, 2.5 module.

Q: What SWC series is this compatible with?
A: This spline sleeve is compatible with SWC120 series cardan shafts. Custom sizes are available for SWC150, SWC180, SWC200, SWC225, SWC250, SWC285, and SWC315.

Q: What is the difference between a spline sleeve and a spline shaft?
A: The spline sleeve is the internal spline component (female) that fits over the spline shaft (external spline, male). Together they form the telescopic spline assembly that allows axial length adjustment [1†L13-L15][4†L13].

Q: Is the spline sleeve a replacement part?
A: Yes. The spline sleeve is a replacement component for worn or damaged spline sleeves in SWC cardan shafts [3†L13-L16].

Q: Can I get a custom spline sleeve?
A: Yes. We offer OEM customization – custom dimensions, materials, and specifications available [7†L20].

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

Request a Quote

Send us your SWC model (SWC120, SWC150, etc.), required dimensions, quantity, and any customization requirements. Our engineers will provide a quotation within 24 hours.