GARANT Solid carbide drill plain shank DIN 6535 HA 180°, TiAlN

Version:
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 using the solid carbide 180° drill it is absolutely essential for process reliability:

• when spot drilling on flat surfaces to 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 % and 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.

Note:
Flute length L_C = L₂ + 1.5 × D_C.
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 DIN974-1.
Standard: Manufacturer's standard
Tolerance nominal ?: m7
Number of cutting edges Z: 2
Tolerance nominal ?: m7
recommended maximum drilling depth L₂: 32 mm
Overall length L: 89 mm
Shank ? D_s: 10 mm
Feed f in steel < 900 N/mm²: 0.15 mm/rev.