Spline Shafts

Jinjiang Feida Machinery Co., Ltd. produces spline shafts in its own 45,000 m² facility in Jinjiang, China. The products feature high Load-carrying capacity, more uniform load distribution, good guiding performance, compact structure, and good positioning accuracy.

Common Types

A spline shaft is a shaft with multiple longitudinal spline teeth machined around its outer circumference. These teeth engage with corresponding internal splines in hubs, gears, couplings, or other components. Its common types include:

Rectangular Spline Shafts: They have a relatively simple tooth profile, with straight tooth flanks, are comparatively easy to manufacture and inspect, and have been widely used in machine tools, mechanical transmission systems, and conventional industrial equipment.
Involute Spline Shafts: They have a tooth profile similar to that of involute gears and provide favorable load distribution characteristics. Their relatively robust tooth roots can provide good load-carrying capacity for a given shaft size. They can also be designed with different centering methods and can be manufactured using processes such as spline hobbing and shaping.

Manufacturing Processes & Quality Control

Feida carries out the standard production in its own 45,000 m² facility in Jinjiang. The manufacturing steps:

Raw Material Selection → Forging → Turning → Gear Hobbing/Gear Shaping → Heat Treatment → Grinding → Inspection → Packaging

For applications requiring high precision, spline grinding can be added to further improve tooth accuracy, dimensional consistency, and surface quality.

Feida conducts production activities in compliance with ISO 9001:2015. Quality control is implemented throughout the entire production process, covering IQC, IPQC, FQC and OQC, to ensure product quality.

Applications

Automotive Industry

Widely used in automotive transmission systems, including transmissions, drive shafts, axles, and certain steering and drive mechanisms.

Construction Machinery

Used in excavators, wheel loaders, cranes, bulldozers, and other construction machinery that often need to transmit high levels of torque.

Machine Tools

Used in spindle systems, feed mechanisms, and other transmission assemblies of machine tools to provide torque transmission and axial guidance while maintaining the required rotational accuracy.

Agricultural Machinery

Used in power transmission systems of tractors, harvesters, rotary tillers, and other agricultural machinery.

Industrial Automation

Increasingly used in transmission modules, actuators, and precision machinery to transmit rotary power and enable axial movement.

Frequently Asked Questions

Can you provide customization service?

Yes. We can customize spline shaft according to specific equipment and application requirements. Customization includes:

● Shaft diameter
● Outside and inside diameters
● Number of spline teeth
● Spline length
● Overall shaft length
● Spline profile and specification
● Accuracy and tolerance class
● Material
● Heat treatment
● Surface treatment
● End configurations
● Threads, keyways, shoulders, and other features

Why is heat treatment required for spline shafts?

Heat treatment can improve the hardness, strength, wear resistance, and fatigue performance of a spline shaft.