CoroChuck 930 High-precision hydraulic chuck with high pull-out security and precision

With the best pull-out security on the market, this chuck is designed to eliminate vibration for excellent stability and accessibility in all milling and drilling operations. Covering all machine interfaces, CoroChuck™ 930 helps to maintain efficient production through quick and easy tool set-ups and changes. Also available as a Tailor Made option.



  • High metal removal rate increases productivity
  • Secure processes and safe machining
  • Quick tool change and set-up
  • Enhanced surface finish and increased tool life
  • Close hole tolerance



  • Offers the best pull-out security on the market due to the latest Fulcrum technology* used for uppermost clamping performance with high clamping force. The clamping force repeats time after time.
  • Easy handling with torque wrench used for secure clamping
  • The machine-side coupling is ground as the last operation to guarantee the highest demands on precision
  • Precision run-out <4 μm (157 μinch) at 2.5 × DC
  • High-precision repetition
  • Balancing according to DIN 69888
  • Clamping length can be adjusted with an adjustment screw



  • Suitable for milling and drilling operations where precision, easy handling and high pull-out security are required
  • Covers all of the important machine interfaces, now also in BIG-PLUS spindles

Diameter, mm

​ ​ ​ ​
Finishing Semi-finishing Roughing Heavy roughing







* The secret behind the light precision and pull-out security of CoroChuck 930 is optimized design of the membrane. It allows for secure clamping with two supports on each side (fulcrums).


Optimize CoroChuck 930 for your component. The HD and Slender version with length options in all current machine interfaces.

Product range

​ Machine design​Coupling sizes​CoroChuck 930 version​Bore sizes, mm (inch)
​Coromant Capto®​C3​Slender​6‒32 (0.24‒1.26)
​Coromant Capto®​C4─10​HD, Slender, Pencil​6‒32 (0.24‒1.26)
​H SK​63, 100​​HD, Slender, Pencil​6‒32 (0.24‒1.26)
 ​ISO​40, 50​​HD, Slender, Pencil​6‒32 (0.24‒1.26)
 ​CAT-V​40, 50​​HD, Slender, Pencil​6‒32 (0.24‒1.26)
 ​MAS BT​30, 40, 50​​HD, Slender, Pencil​6‒32 (0.24‒1.26)
 ​ISO BIG-PLUS​40, 50​HD, Slender, Pencil​6‒32 (0.24‒1.26)
 ​CAT BIG-PLUS​40, 50​HD, Slender, Pencil​6‒32 (0.24‒1.26)
​ MAT BT BIG-PLUS​30, 40, 50​HD, Slender, Pencil​6‒32 (0.24‒1.26)