These toolholders are designed for ISO20 ATC Spindles. The balancing of these toolholders is done to a very high grade, and that’s why they can run up to 30,000RPM.

We strongly recommend when working at high RPM you always verify the toolholder has 100% fit and the pull stud is 100% compatible with your spindle. Incorrect fit can cause major bearing damage and destroy the ATC Spindle


Toolholder ISO20 according to DIN69871
Precision class: AT3 Dynamic balancing: G2.5 (ISO1940) @ 30000rpm
Includes pullstud (TeknoMotor/HSD/HQD compatible)
Includes balanced ER20 collet nut
Colletsize: ER20

EXCLUDES: spanner and mounting device which can be ordered separately

Other ER collet sizes available as special order