Questions and answers · Tools

Which milling bit for sink and hob cut-outs?

Short answer

Sink and hob cut-outs on a CNC centre are made with a diamond finger bit matched to the worktop material. Holes for taps are drilled with a thin-wall core bit, and the cut-out edge is finished with a chamfering bit or a polishing set.

With WODIAM bits the colour indicates the material: white and blue — sintered stone and ceramics, red — granite, agglomerates and quartzite, yellow — agglomerates. For marble there is an electroplated finger bit ø20 mm (lengths 45, 80 and 120 mm).

The whole cut-out step by step

  • Starting hole — a thin-wall core bit; one core bit works in many materials.
  • Cut-out — a finger bit in the colour of the material.
  • Corners — an incremental bit guided from the side reduces the corner radius.
  • Edge — the BIT-CH bit (chamfer from above or below in one pass) or a DRS polishing set.

When the bit slows down

Most often there is not enough water through the tool axis, the segment is glazed or the feed rate is too high. Check internal and external cooling, expose the diamond on a dressing stone and reduce the feed. In sintered stone make the last pass with a smaller allowance.

Recommended

Products for the job

StoneZone is the exclusive distributor of these brands in Poland. We can test every tool on your machine.

WODIAM

WODIAM finger bits

For sink and hob cut-outs. The colour of the bit indicates the material: white and blue — sintered stone, red — granite and quartzite, yellow — agglomerates.

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FAQ

Frequently asked questions

Which bit for a cut-out in sintered stone?

A WODIAM finger bit in white or blue — both are designed for sintered stone and ceramics.

Which bit for a cut-out in granite and quartzite?

A red WODIAM finger bit — for granite, agglomerates and quartzite.

How to reduce the corner radius of a cut-out?

Use an incremental bit guided from the side (red for granite and agglomerates, white for sintered stone).

What to drill tap holes with?

With a thin-wall core bit on a CNC centre. In quartzite it drills at up to 55 mm/min, in other materials at up to 110 mm/min.

See also