Description
Special point geometry for generating 180° flat-bottomed holes.
Low radial forces even when spot drilling on faces with up to 45° slope.
Flute geometry for optimum chip evacuation.
With 4 guide chamfers to stabilise the drill in the hole.
Advantage
The 180° point angle permits drilling and counterboring in a single operation.
Recommendation
- When spot drilling on flat surfaces drill a pilot hole 1×D using pilot drill No. 122736.
- When spot drilling on sloping surfaces up to 15°: reduce the feed rate f to 50%; up to 30°: reduce the feed rate f to 40%; up to 45°: reduce the feed rate f to 25% of the stated value.
- After spot drilling, the normal feed rate value can be used.
Product Data
Product type: Solid carbide drill 180°
Material: Solid carbide
Standard: Standard
Shank: Plain shank DIN 6535 HA
Shank tolerance: h6
Diameter tolerance: m7
Number of cutting edges: 2
Point angle: 180°
Through-coolant pressure: 25 bar
Coating: TiAlN
Drilling depth: 3×D
Ø Dc: 8.9 mm
L2: 33.7 mm
L: 89 mm
Ø Ds: 10 mm
Feed (f): 0.15 mm/rev
Cutting Data
Steel <500 N: 85 m/min
Steel <750 N: 75 m/min
Steel <900 N: 60 m/min
Steel <1100 N: 50 m/min
INOX <900 N: 45 m/min
GG(G): 90 m/min
ISO Code
Alu plastics: N
Alu: N
Alu cast >10% Si: N
Steel <500 N: P
Steel <750 N: P
Steel <900 N: P
Steel <1100 N: P
Steel <1400 N: P
Steel <55 HRC: H
Steel <60 HRC: H
Steel <65 HRC: H
Steel <67 HRC: H
Steel <70 HRC: H
INOX <900 N: M
INOX >900 N: M
Ti >850 N: S
GG(G): K
Note
Flute length Lc = L2 + 1.5 × Dc.
Form HB and HE supplied at the same price as HA.
Form HB: order with No. 122506 + 129100HB.
Form HE: order with No. 122506 + 129100HE.
180° solid carbide drills for machining aluminium available on request.
Not suitable for generating counterbores for socket-head screws to DIN 974-1.