Vincent Yellow CNC Finger Bit – 23 mm, 1/2 Gas, for Granite, Quartz & Quartzite
The Vincent Yellow 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 and natural quartzite.
Spindle speed: 5,000–5,500 RPM
Feed rate: 16–18 in./min (400–450 mm/min)
Spindle speed on natural quartzite: 3,900–4,200 RPM
Feed rate on natural quartzite: 4 in./min (100 mm/min)
Diameter: 0.91 in. (23 mm) · Diamond length: 1.65 in. (42 mm) · Fitting: 1/2 in. Gas
Key Features
- Two published parameter sets, not one. Vincent lists this bit at 5,000–5,500 RPM and 16–18 in./min (400–450 mm/min) on granite and engineered stone, and at 3,900–4,200 RPM and 4 in./min (100 mm/min) on natural quartzite — the harder, denser material runs slower. Programming the granite numbers into quartzite is the usual way these bits are lost.
- Yellow in Vincent's colour system means high speed. It is the fast-cutting grade, run at the top of the range. 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 16–18 in./min (400–450 mm/min) on granite and engineered stone, and 3,900–4,200 RPM at 4 in./min (100 mm/min) on natural quartzite.
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.