Общий каталог ZCC-CT 2019 - страница 1111

A Solid carbide drills

Operation notes

Correct drill clamping Max. drilling length Radial run-out Wrong drill clamping

B

Use precision collets H = 1,5 x d1 Radial run-out <0.02 mm Don't clamp on the drill flutes.

External coolant method Internal coolant method

C

D The coolant liquid should shoot to the end Coolant pressure is about 0.5–1 mpa (coolant pressure is 2–3 mpa when

and the centre of the drill as shown in the figure. the diameter is less than 5 mm), coolant volume: 1.5–4 L/min Handling of coolants: 1. Small chip particles and dust can cause jamming in the oil hole. A fine mesh filter should be used. 2. Dirt and dust particles will adhere to the oil hole and lead to unsmooth coolant flow. Regularly change the coolant. Please ensure proper coolant

supply.

Interrupted cutting

E

Reduce the feed rate when drilling interrupted cut.

Thin work pieces

Burrs and work piece Stepped holes chippings on exit

– First drill the larger hole, then the – Reduce the feed rate approx. by smaller hole. half when the drill exits. – We can offer multiple step and – Use a drill with a different point chamfer drills on request. angle.

Machine a countersink with If bending occurs, add a supporter. an end mill prior to drilling.