Chucks - HydroGrip®
HydroGrip® face mill holder – mounting the cutting head
Make sure that the arbor coupling is free of dirt and burrs.
Loosen the pressure screw.3.
Attach the cutting head to the adaptor.4.
Attach the socket head cap screw.
Tighten the socket head cap screw.
Tighten the pressure screw with a torque wrench (max. 6 Nm).
How to clamp
HydroGrip® 6 Nm
HydroGrip® HD 10 Nm
A torque wrench should be used to ensure the correct clamping force is applied.
Axial tool stop
An axial tool stop can be provided where the hole through the taper is threaded in the front end. An M8 screw can be inserted into this hole to act as a tool stop.
When cutting fluid is required through the flange, the screw will act as a spindle seal. If cutting fluid is required through the spindle, a 3.5 mm diameter hole should be drilled through the screw.
Clamping of any type of tool shank
dmm 6 mm
High clamping forces in tool holding determine how securely the cutting tool is held and the torque transmission during machining. As cutting forces act on the tool, the tool will tend to slip in the holder. The capability of the tool holder can then be related to how tightly the tool-shank is clamped.
The HydroGrip can exceed the clamping force of a conventional chuck by up to three times. This mean that the HydroGrip product range can clamp any type of tool shank up to h7 tolerance.
Note: It is not possible to clamp a HydroGrip 6 mm diameter chuck.
- without any tool
- with Weldon or Whistle Notch holders.
All HydroGrip chucks, except the face mill holder, can be used with a cylindrical collet. The collet is available in slitted and sealed variants and must be ordered separately.
Always use a collet that fits the tool.
Capacity values for HydroGrip® chucks
Recommended maximum spindle speeds are specified for each chuck type and size. The high clamping forces in combination with the precision and balancing provide the ability for high speed machining.
Minimum torque transmission required for machining
Material : low-alloy steel (CMC 02.2)
Operation : full slot milling
Tool : CoroMill 390 indexable endmill
Torque values in Nm
HydroGrip® chuck handling hints
- Before inserting the tool shank, always make sure that the shank is undamaged, that it holds the correct dimensions, and is clean – especially the bore of the chuck.
- If possible, insert the tool-shank all the way. The transmittable torque will be reduced in relation to the reduction of insertion.
- When storing the chuck, protect it against corrosion by spraying it with oil.
- Never use excessive force when trying to insert a toolshank into the chuck.
- These chucks are precision tool holders and should be handled with care.
- On the HydroGrip chuck, tighten the pressurizing screw to the stop by using the recommended wrench.
- Keep the HydroGrip chuck in vertical position and turn the cutter slightly when tightening the pressurizing screw. (This will achieve the very best accuracy).
- If a correctly-dimensioned tool shank is not clamped in the chuck when the bottom position is very close on the clamping screw - less than a turn - the chuck is in need of service.
- Never use the HydroGrip chuck in an environment where temperatures exceed 50 degrees C (120 degrees F). (This may increase the internal pressure of the chuck and affect it negatively).
- Never remove the pressurizing screw on the HydroGrip chuck. Untightening by a few turns is enough to release the tool.
- Never turn the small (M6) air-release screw on the HydroGrip chuck as this will make the chuck unworkable.