Nachi
Nachi SG FLAT Drills



Manufacturer: Nachi-fujikoshi corp
Model: SG FLAT
Outline
Flat drills made of HSS superior in cost performance
Realize stable drilling of larger flat-bottom holes with the adoption of high alloy HSS(FMX) and SG coating.
Size range : Ø16 to Ø50
Well balance between rigidity and chip evacuation with the adoption of optimal flute geometry
Restrain hole expansion and realize the drilling of high accurate flat-bottom holes.
Adoption of Gash land
Improve chipping resistance on the corner of cutting edge and realize longer tool life.
Features
Multi-Function Drills
Applicable work materials
Structural Steels | Carbon Steels | Hardened Steels Alloy Steels | Hardened Steels Mold Steels | Hardened Steels | Stainless Steels | Titanium Alloys Nickel Alloys | Cast Irons | Aluminum Alloys | Copper Alloys | ||
SS400 | S45C S50C | SGr NAK | 25 to 40HRC | 40 to 50HRC | 50 to 65HRC | SUS304 | SUS316 | – | FCD/FC | AC/ADC | Cu |
◎ | ◎ | ◎ | ◎ | × | × | ○ | ○ | ○ | ○ | ○ | ○ |
Cutting edge geometry of SG FLAT Drills
Performance
Perfoemance of SG FLAT DrillsTool Diameter: ⌀20
Cutting Speed: 25 m/min
Feed: 80 mm/min (0.2 mm/rev)
Hole Depth: 20 mm Blind
Material: S50C
Coolant: WetTool Diameter: ⌀50 mm
Cutting Speed: 25 m/min
Feed: 80 mm/min (0.2 mm/rev)
Hole Depth: 20 mm Through
Material: S50C
Coolant: Wet
Example : Counterboring without pilot hole (Ø50)
Tool Diameter: ⌀20 mm
Cutting Speed: 25 m/min
Feed: 45 mm/min (0.28 mm/rev)
Hole Depth: 30 mm blind hole (5 mm step)
Material: S50C
Coolant: Wet
Machine: Vertical BT50
Chip jams are likely to occur
High cutting resistance
Example : Counterboring a bolt hole (M30)
Tool Diameter: ⌀50 mm
Cutting Speed: 25 m/min
Feed: 45 mm/min (0.28 mm/rev)
Hole Depth: 30 mm blind hole (5 mm step)
Material: S50C
Coolant: Wet
Machine: Vertical BT50
Attention to chip length!