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!