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 SteelsCarbon SteelsHardened Steels Alloy SteelsHardened Steels Mold SteelsHardened SteelsStainless SteelsTitanium Alloys Nickel AlloysCast IronsAluminum AlloysCopper Alloys
SS400S45C
S50C
SGr
NAK
25 to 40HRC40 to 50HRC50 to 65HRCSUS304SUS316FCD/FCAC/ADCCu
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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!

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