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Solid carbide drill plain shank DIN 6535 HA 180°, TiAlN, ⌀ DC m7: 7,8mm
Article no.: 122793 7,8
Article code:
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Plain shank DIN 6535 HA
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Cutter with corner chamfer
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- Tool material: Solid carbide
- Standard: Manufacturer’s standard
- Version: 5×D
- Tolerance nominal ⌀: m7
- Number of cutting edges Z: 2
Product details
Technical Data
| Nominal ⌀ DC | 7.8 mm | |
| Coating | TiAlN | |
| Tool material | Solid carbide | |
| Standard | Manufacturer’s standard | |
| Version | 5×D | |
| Tolerance nominal ⌀ | m7 | |
| Number of cutting edges Z | 2 | |
| Point angle | 180 degrees | |
| recommended maximum drilling depth L2 | 41.3 mm | |
| Shank | DIN 6535 HA to h6 | |
| Use for drilling | limited convexity; limited cross-drilling; limited oblique spot drilling | |
| Through-coolant | yes, with 25 bar | |
| Pilot drill required | yes, pilot drill | |
| Semi-Standard | yes | |
| Flute length Lc | 53 mm | |
| Overall length L | 91 mm | |
| Shank ⌀ Ds | 8 mm | |
| Shank tolerance | h6 | |
| Feed f in steel < 900 N/mm2 | 0.12 mm/rev. | |
| Colour ring | green | |
| Type of product | Jobber drill |
Identification & Classification
| Article number | 122793 7,8 | |
| EAN / GTIN | 4045197745040 | |
| Manufacturer number | 122793 7,8 | |
| Manufacturer | Hoffmann Supply Chain GmbH & Co. KG, Poststraße 15, 90471 Nürnberg, Germany, www.hoffmann-group.com |
Application Table
P
85
P
75
P
60
P
50
M
45
K
90
Description
Version:
Special point geometry for generating 180° flat-bottomed holes. Low radial forces even when spot drilling on faces with up to 15° 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 max. 15° : 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 LC = L2 + 1.5 × DC.
Form HB and HE supplied at the same price as HA.
Form HB: order with No. 122793 + 129100HB .
Form HE: order with No. 122793 + 129100HE.
180° solid carbide drills for machining aluminium available on request.
Not suitable for generating counterbores for socket-head screws to DIN974-1.
Form HB and HE supplied at the same price as HA.
Form HB: order with No. 122793 + 129100HB .
Form HE: order with No. 122793 + 129100HE.
180° solid carbide drills for machining aluminium available on request.
Not suitable for generating counterbores for socket-head screws to DIN974-1.