Vincent Blue CNC Finger Bit – 23 mm, 50 mm Diamond Length, 1/2 Gas, for Granite & Quartz

The Vincent Blue CNC Finger Bit is a 0.91 in. (23 mm) CNC shaft milling cutter — a finger bit for cutting sink and cooktop openings and inside radii on granite and engineered stone.

Spindle speed: 5,000–5,500 RPM
Feed rate: 8–12 in./min (200–300 mm/min)

Diameter: 0.91 in. (23 mm) · Diamond length: 1.97 in. (50 mm) · Fitting: 1/2 in. Gas

Key Features

• Vincent publishes 5,000–5,500 RPM at 8–12 in./min (200–300 mm/min) for this bit on granite and engineered stone.
• Blue in Vincent's colour system means hard granite. It is the grade for hard, dense granite, where a softer bond would wear away too fast. The key is Vincent-specific and does not read across to other manufacturers' bits.
• 1/2 in. Gas fitting, so it runs in the same holders as the rest of the Vincent 1/2 in. Gas range.

Who Is This For

A fabricator cutting openings on a CNC in a high-production shop, where the bit runs in unattended cycles and a wrong feed rate is not noticed until the segment is gone.

It is not a profiling tool and not a polisher — it opens and shapes, and leaves a ground surface. The edge of the opening is finished afterwards with the profile set or by hand.

Frequently Asked Questions

What speed and feed does Vincent publish for this bit?
5,000–5,500 RPM at 8–12 in./min (200–300 mm/min).

What does it fit?
A 1/2 in. Gas tool holder.

Is it a drill?
No. It is a side-cutting milling tool. Plunge it and you load the end face, which is not where the diamond is meant to work; drop in with a ramp or start from a cored hole.