DIAMETER: 4mm-120mm

C-grade diamond core drill bits for glass processing, conic shank, drilling more than 3000pcs holes

Details:

1. Bronze diamond glass drill bits are suit for all kinds of 4-19mm thickness glass;

2. Pls note: we suggest that working speed 3000-3500rpm for Ø4-Ø42,2000-2500rpm for Ø45-Ø70 and 1000-1500rpm for Ø70-Ø100 is best.

3. During the working, pls ensure the drill bit is cooling by water from inner and outside. If the drill bits are not sharp enough after some time, pls use 80-100# white corundum wheel to sharpen it then it can work again.

4. OEM is acceptable.