Home / DR-100 Applications
Machining Roll with CBN
Martensitic cast irons - Ni-hard - High Chrome irons Chilled cast irons
Fully hardened cold-work tool steels
Bearing steels
High speed steels
Martenstic stainless steels
Cobalt and nickel based hard facing alloys
Fully pearlitic grey cast iron
DR-100 has a high CBN content, 99%, and is supplied as solid I.S.O format indexable inserts for top clamp
tool holders. PCBN cutting tools machine hardened steels with apparent ease because, using relatively high
surface speeds, heat is generated at the point of cutting so the PCBN tool cuts locally softened material.
Using negative rake tool geometries to provide a strong edge, the heat is carried away from the work piece
by the chip, which rapidly air cools to provide a brittle and harmless swarf, and the DR-100 insert, which
has a very high thermal conductivity. This leaves the component cool, with its hardness unaffected.
Cutting forces are similar to those experienced by hard metal cutting tools machining soft steel. DR-100 should be used as a roughing or semi-finishing tool for hardened steel. Where a light depth of cut (less than
0.50 mm) is required, DR-50 should be used. DR-100 machines fully Pearlitic cast iron, rough and finish, where the solid insert format allows. Although DR-100 is tough, vibration or deflection will result in poor tool life.
Coolant can be used to; drive the swarf away from the shear zone where it might interfere with the cutting edge and; keep the temperature of the part stable
When machining hardened materials, coolant must not be used where interrupted cutting occurs, as this will thermally shock the DR-100 insert as it comes out of cut, resulting in catastrophic failure of the tool. Coolant can be used for interrupted cutting cast iron that has not been heat treated.
Machining White Iron Roll with CBN
