DM end milling system features: easy-change tips 

Horn DM Series end mills are designed for rough and semi finish end milling using a unique design of replaceable insert. The tips locate in a common holder using a bayonet locking system and 8mm, 10mm and 12mm diameter versions are available.

The DM system exhibits excellent stability at spindle speeds of over 20000 rev/min and its rigidity provides excellent performance on deep pocket milling applications.

DM offers ease of tip change, consistency of length, rigidity and run-out. The Horn location system is offers very high repeatability of insert location using a uniquely engineered tip/holder interface. Run-out accuracy of the assembled tool is within 20 microns TIR.

Firstly, Horn DM tips can be removed and replaced without removing the shank/holder from the machine.

Secondly repeatability of location/length is within 30 microns - so for most applications no re-setting of tool length offset is required

Thirdly, Horn DM edge position does not vary during machining as the location design prevents the tip from ‘sinking’ into the holder during machining

Fourth, unlocking the insert from the holder is reliably easy as the bayonet location/locking system is designed for immunity from seizure.

The key technology incorporated into Horn DM Series tooling is the location system. The holder nose is machined with a conical seat and a helical internal groove, accessed via an asymmetric ‘coffin shaped’ plug-in port. This last prevents mis-orientation of the insert.

DM inserts are moulded with a T-head location pin having a correspondingly shaped locator but the conical seating on the insert has three raised pads. This three point location ensures that the insert sits squarely on its conical seat while the gap maintained by the pads prevents cold welding of the insert to the holder. Torque is transmitted mainly by the location pin.

Tightening the insert into the holder to a torque of 6Nm using the Horn-supplied torque spanner provides an absolutely secure location.  Removal of a worn or damaged insert is a simple matter using the same tool.

Please use this link for our: Horn technical DM End Milling catalogue.