TBI Ball Spline SOT Series

Advantages and features: The TBI ball spline SOT series is widely used, such as in aircraft, automobiles, tractors, machine tool manufacturing, agricultural machinery, and general mechanical transmission devices

1. Function: TBI spline shaft is a type of mechanical transmission that transmits mechanical torque, just like flat keys, half circle keys, and oblique keys

2. Structure: There are longitudinal key slots on the outer surface of the TBI ball spline shaft, and the rotating parts fitted on the shaft also have corresponding key slots, which can maintain synchronous rotation with the shaft. While rotating, some can also slide longitudinally on the shaft, such as gearbox shift gears.

3. Application example: TBI ball spline in brakes and steering mechanisms. Another type is a telescopic shaft composed of inner and outer tubes, with the outer tube having inner teeth and the inner tube having outer teeth, which are fitted together. When in use, it can expand and contract in the length direction while transmitting rotational torque.

4. Material: 40Cr

5. Heat treatment. Quenched surface hardness HRC45-50.


TBI Ball Spline Model Description






TBI Ball Spline Solid Shaft Cross Section Diagram

The solid cross-sectional shape of the TBI ball spline SOT series is shown in the following figure. The spline shaft end is a flange type, which can exceed the groove diameter (∅ d) under the condition of pit energy. The SOT series spline is precisely ground by rolling the grooves of the spline, connected to high precision, and then matched with the outer cylinder



TBI Ball Spline Hollow Shaft Sectional View

If it is necessary to reduce the weight of piping, wiring, and exhaust cargo, a hollow SOT spline shaft can be used




The Special Features of TBI Ball Spline

The outer diameter of the SOT spline outer cylinder is a straight cylinder type, which is used after the key is tapped in when transmitting torque, and is one of the forms with the smallest installation spaceone

TBI ball spline lubrication

The replenishment of lubricating grease is selected according to different usage conditions over time. Generally, when used, the replenishment or exchange of lubricating grease is based on a running distance of up to 100km (6 months to 1 year). Please apply lubricating grease to the outer cylinder of the spline or to the rolling groove of the spline shaft.

TBI Ball Spline Material

Depending on the usage environment, it may be necessary to dust treat or use different materials for the ball spline. For information on dust treatment and material usage, please feel free to call to collect.

TBI Ball Spline Installation



Attention: Although the fixing strength of SOT spline shaft direction is not required to be very high, it should be avoided to only knock it in without fixing it

TBI Ball Spline Dimensional Drawing







TBI-SOT series ball spline model

SOT008 SOT010 SOT013 SOT016 SOT020 SOT025