For quick and easy tool mounting, gently press the tip down and towards the support surfaces while tightening the screw to the recommended torque shown on the drill body. Preferably use a torque screw driver to ensure that the tip is securely seated.
Internal cutting fluid is recommended in order to secure safe chip evacuation. Please apply sufficient cutting fluid flow and follow the recommendation on emulsion concentration from the oil supplier.
For optimum stability and minimum run-out, clamp CoroDrill 870 with a CoroChuck™ 930 hydraulic chuck with sealed cylindrical collet.
Note: Never use a CoroChuck™ 930 in combination with an ISO 9766 shank without cylindrical collet!
Cutting data recommendations for CoroDrill 870