Manual

3. Turning

Summary: How to avoid vibration

Increase static stiffness

• Check the clamping and set-up

• Use Coromant Capto or split holder

• Minimum tool overhang and maximized diameter

• Material reinforcement (boring bars)

Increase dynamic stiffness

• Small insert point angle

• Use dampened tools

• As low weight in front of the cutting tool as possible

Reduce the cutting forces

• Use a positive cutting angle

• Use a positive insert geometry with small ER

Avoid deection

• Change the direction of the cutting force from radial to axial

• Entering angle close to 90° (lead angle 0°)

• Depth of cut bigger than nose radius

Enable chip control

• Increase coolant ow

• Clearance between tool and workpiece

• Check that all chips have been evacuated

Note!

Be sure not to overload the dampened boring bar. Maximum load is

marked on the products and you can also use the calculator avail-

able at www.sandvik.coromant.com/knowledge to nd maximum

load.