Precision Arbors for Machining

Whether you work in aerospace, medical, automotive, bicycle, or another high-precision industry, improving accuracy and productivity is a goal we share.

The Tool Holder Is the Final Link in Accuracy

No matter how accurate the spindle or how sharp the cutting tool, the cutting force must pass through the holder before reaching the cutting edge. The holder’s runout, clamping force, and damping characteristics directly determine surface finish, tool life, and achievable depth of cut.

Spindle Interfaces

The spindle interface is normally determined by the machine and cannot be selected independently with the holder:

BT: A 7:24 taper located by taper contact only; widely used, with replacement parts readily available
HSK: A 1:10 hollow short taper with simultaneous taper and face contact; offers better repeatability at high spindle speeds
BBT: Adds dual contact to the 7:24 taper, allowing compatible BT machines to benefit from face contact

Advantages of Hydraulic Tool Holders

A hydraulic tool holder uses an oil chamber to expand a thin-walled sleeve and grip the tool shank evenly. Low runout and good damping help improve surface finish and tool life, while tool changes require only one wrench.

Mongtec BT and HSK hydraulic tool holders achieve accuracy of 0.003 mm. For heavy cutting that requires extremely high clamping force, shrink-fit or another clamping method should be evaluated.