Ball Spline
Ball Spline
Basic Structure of TBI Ball spline 
The design of TBI Ball spline is to utilize the friction force through the contact of steel balls within in the Spline Nut and the grooves on the Spline Shaft. With TBI MOTION’s unique 40° angular contact design which enables the Ball spline delivers high sensitivity and extreme high load carrying capacity. The concept is optimal for the application involve with high speed, vibrates, impacts of loading and precise positioning requirements. Also when the Ball spline is used to function as linear bushing, the Ball spline provides ten times loading capacity than the linear bushing in the like dimensioned but with a compact profile. Namely, Durability and reliablility is the reason for choosing TBI Ball spline in your application.
TBI MOTION Nut design and Shaft spec
TBI MOTION Spline Nut is available in two different designs: SLF (Flange design) and SLT (Non-flange design). Point of contacts on the Spline shaft is provided in two grooves (180°) (SLF/SLT6~20) and four grooves (70°) (SLF/SLT25~50) base on the diameter of the Spline shaft. Also TBI provides Hollow Spline shaft for alternative.
TBI MOTION Ball Spline Feature
High Load-Carrying Capacity
Every groove on the TBI Spline shaft is precision ground to form a perfect 40° angular contact point. The concept of 40° contact design is to increases the load carrying capacity and rigidity so that it is able to handle a greater moment load.
Zero Angular clerance/backlash
Every groove on the TBI Spline shaft is precision ground to form a perfect 40° angular contact point which is called the Gothic arch. The Gothic design eliminates clearance that could generate deflections and therefore best suited for the applications that requiring maximum precision.
High Sensitivity
The unique TBI 40° angular contact is design to drive with the minimum of friction force while the design performs not only the highest sensitivity but also the rigidity.
High Rigidity
A wide contact angle and an appropriate level off preload are combined to provide high torque and moment rigidity.
EZY Mount on design
TBI Ball spline is low and simple maintenance designed, therefore even if disassembly is required. When the Spline Nut is necessary to remove for the spline shaft due to the ball retaining design the steel balls will not fall apart like the traditional Nut design.


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