D938 Twist drill for steel
Suitable for efficient Drilling of Steel, Cast Iron and Stainless steel
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- Feature
- Application
- Application case
- Suitable for efficient Drilling of Steel, Cast Iron and Stainlesssteel
- New substrate material, perfect balance of toughness and wear resistance
- Using AlTiN-nano coating and unique post-processing of coating
- Optimize groove profile and Drill point design, with super self-centering Performance, chip breaking performance and good chip evacuation performance
Specification
| Drills Series | Dimension Range | Coolant Type | Drilling Depth L/D |
| D938-A3N | 1～20mm | External Coolant | 3D |
| D938-A3C | 2～20mm | Internal Coolant | 3D |
| D938-A5N | 1～20mm | External Coolant | 5D |
| D938-A5C | 2～20mm | Internal Coolant | 5D |
| D938-A8C | 3～20mm | Internal Coolant | 8D |
| D938-A12C | 3~16mm | Internal Coolant | 12D |
| D938-A15C | 3~14mm | Internal Coolant | 15D |
| D938-A20C | 3~12mm | Internal Coolant | 20D |
| D938-A25C | 3~8mm | Internal Coolant | 25D |
Application
D938 Processing Case (Pressure turbine discs)
| Specification | D938-A3N-0970 |
| Dimension | D9.7*47*89*d10 |
| Material | 14Cr12Ni2WMoVNb (HB250) |
| Cutting speed | Vc=18m/min |
| Feed rate | fr =0.05mm/r |
| Cutting depth | ap=20mm |
| Cooling method | External Coolant |
| Cutting method | Vertical processing |
D938 Processing Case（Valve housing）
| Specification | D938-A15C-0850 |
| Dimension | D8.5*160*204*d10 |
| Material | 35CrMoA
(205-250HB) |
| Cutting speed | Vc=42.7m/min |
| Feed rate | fr =0.13mm/r |
| Cutting depth | ap=138mm |
| Cooling method | Internal Coolant |
| Cutting method | Vertical processing |
