Twist drill specifications:
Φ Φ 1.0, 2.5, 1.5, 2.0, Φ Φ Φ Φ 3.0, 3.2, 3.3, 3.5 and 3.8, Φ Φ Φ Φ 4.0, 4.2, 4.5 and 4.8, Φ Φ Φ Φ 5.5, 5.0, 5.2, Φ Φ Φ 5.8, Φ Φ 6.0, 6.2, 6.5, 6.8 and 7.0, Φ Φ Φ Φ 7.2, Φ 7.5, Φ Φ 7.8, 8.5, 8.0, 8.2, Φ Φ Φ Φ 8.8, 9.0, 9.2, 9.5 and 10.0, Φ Φ Φ Φ 10.2, 10.5, 11.0 and 12.0, Φ Φ Φ Φ 13.5, 12.5, 13.0, Φ Φ Φ 14.
Drill diameter specification:
There are many specifications of the drill, like some water pipes through the drill hole is relatively large, and the wire required to drill much smaller, so the drill diameter is also different.
Drill diameter specifications are roughly 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 9.8mm, etc., each distance of 1mm, of which there are 0.1mm accumulation, such as diameter from 1mm to 2mm drill specifications according to 0.1mm carry, there are larger, for oil drilling, generally not used. Unless oil exploration.
