Spline Shaft

A spline shaft is a mechanical component designed to transfer torque between two rotating parts while allowing for linear motion or axial displacement. It features a series of ridges or teeth, called splines, along its length. These splines mesh with corresponding grooves in a mating component, such as a gear or coupling, enabling efficient torque transmission while permitting movement along the shaft's axis. Spline shafts are commonly used in various applications requiring precise torque transmission and axial movement, including automotive transmissions, industrial machinery, robotics, and aerospace systems. They offer advantages such as improved power transmission efficiency, reduced backlash, and enhanced load-bearing capacity compared to other shaft coupling methods, making them essential components in many mechanical systems. To select a spline shaft from MISUMI, determine the required specifications such as length, diameter, spline type, material, and any additional features. Then, use MISUMI's online catalog or contact direct our MISUMI for assistance.

What is a spline shaft used for?

Spline shafts are essential in systems that require high-torque transmission and synchronized motion with axial displacement. Common uses include:

Automotive transmissions
Industrial machinery
Robotic arms and actuators
Aerospace mechanisms

Their ability to maintain alignment while allowing movement along the shaft makes them critical for complex motion control systems.

What is the purpose of a spline?

Splines serve to transfer rotational force while keeping components precisely aligned. Unlike keys or pins, splines distribute load evenly across multiple teeth, minimizing wear and backlash. This makes them ideal for high-speed and repetitive operations where reliability is critical.

What is the difference between a gear and a spline?

While both gears and splines have toothed profiles, their functions differ:

Gears transfer rotational motion between two separate shafts and usually alter torque or speed.
Spline shafts transmit torque along a shared axis between a shaft and a hub or mating part.

In short, splines are more compact and allow axial sliding, while gears are designed for meshing rotational movement between parallel or intersecting shafts.

Spline Shaft Design and Material Options

MISUMI offers extensive spline shaft design options to match the needs of various industries. Shaft materials include:

SCM415 Equivalent – for high-strength applications
SUJ2 / SUJ2 Equivalent – offering excellent hardness and wear resistance
SUS304 and SUS440C Equivalent – ideal for corrosion-prone environments

Each material supports specific performance needs, from general-purpose shafts to high-precision, high-load setups.

Selecting the Right Spline Shaft

When browsing the spline shaft catalogue from MISUMI, you can filter based on:

Shaft length and outer diameter
Shape of splines
Material
Shaft end configurations

MISUMI's platform makes it easy to select a standard model or configure a custom solution. As one of the trusted spline shaft suppliers, MISUMI ensures consistent quality, rapid delivery, and reliable engineering support.

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