Product Introduction:
The Twist Drill Bit is composed of handle, neck and working part. It is a tool for drilling round holes in a work piece by rotating it against a fixed axis. The product can be clamped on manual or electric hand-held drilling tools or on drilling machines, milling machines, lathes and even machining centers. Our Twist Drill Bit can be supplied in different specification to meet different requirements. Please check the details carefully and let us know your requirements before purchasing!
Features
This Twist Drill Bit is designed perfectly to hand chips from different material which will improve the surface quality and productivity. The linear cutting edge and optimized drill point structure lead to high strength and better cutting performance. And the professional after treatment for coating ensues low-resistance high-efficiency machining. In addition, the double edge-line design can improve machining stability greatly.
Dimensions:
| Drill Diameter | Drilling Depth | Type | Shank Diameter | Overall Length | Flute Length | Drilling Depth | Shank Length |
| 2 | 3 | GD03-0200S | 3 | 58 | 13 | 9 | 28 |
| 5 | GD05-0200S | 3 | 58 | 18 | 14 | 28 | |
| 4 | 3 | GD03-0400S | 4 | 66 | 24 | 17 | 36 |
| 5 | GD05-0400S | 4 | 74 | 36 | 29 | 36 | |
| 6 | 3 | GD03-0600 | 6 | 66 | 28 | 20 | 36 |
| 5 | GD05-0600 | 6 | 82 | 44 | 35 | 36 | |
| 8 | 3 | GD03-0800 | 8 | 79 | 41 | 29 | 36 |
| 5 | GD05-0800 | 8 | 91 | 53 | 43 | 36 | |
| 10 | 3 | GD03-1000 | 10 | 89 | 47 | 35 | 40 |
| 5 | GD05-1000 | 10 | 103 | 61 | 49 | 40 | |
| 12 | 3 | GD03-1200 | 12 | 102 | 55 | 40 | 45 |
| 5 | GD05-1200 | 12 | 118 | 71 | 56 | 45 | |
| 14 | 3 | GD03-1400 | 14 | 107 | 60 | 43 | 45 |
| 5 | GD05-1400 | 14 | 124 | 77 | 60 | 45 |
Long and stable tool life:
Tool: GD05C-0560
Work piece: C70S6(HRC30)
V= 100m/min, F=0.15mm/r, H=27mm
Cooling system: Water soluble cooling
Tool: GD05C-1000
Workpiece: Steel (HB180)
V= 150m/mim, F=0.25mm/r, H=40mm
Cooling system: Water soluble cooling
