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Article code:
EAN / GTIN:
Manufacturer number:
Cat. Nr.:
GARANT Master Steel Micro solid carbide pilot drill, plain shank DIN 6535 HA 5×D, AlCrN, ⌀DC: 2,4mm
Article no.: 176266
Catalog no.: 121223
Article code:
- Tool material: Solid carbide
- Standard: Manufacturer’s standard
- Version: 5×D
- Tolerance nominal ⌀: m6
- Number of cutting edges Z: 2
Product details
Technical Data
| Series | Master Steel | |
| Nominal ⌀ DC | 2.4 mm | |
| Coating | AlCrN | |
| Tool material | Solid carbide | |
| Standard | Manufacturer’s standard | |
| Version | 5×D | |
| Tolerance nominal ⌀ | m6 | |
| Number of cutting edges Z | 2 | |
| Point angle | 135 degrees | |
| recommended maximum drilling depth L2 | 13.2 mm | |
| Shank | DIN 6535 HA to h6 | |
| Through-coolant | yes, with 40 bar | |
| Machining strategy | HPC | |
| Semi-Standard | yes | |
| Flute length Lc | 16.8 mm | |
| Overall length L | 48 mm | |
| Shank ⌀ Ds | 3 mm | |
| Feed f in steel < 1100 N/mm2 | 0.095 mm/rev. | |
| Feed f in stainless steel < 900 N/mm2 | 0.06 mm/rev. | |
| Colour ring | green | |
| Type of product | Jobber drill |
Identification & Classification
| Article number | 176266 | |
| Catalog number | 121223 | |
| EAN / GTIN | 4062406580094 | |
| Manufacturer number | 121223 2,4 | |
| Manufacturer/responsible person | Hoffmann Supply Chain GmbH & Co. KG, Poststraße 15, 90471 Nürnberg, Germany, www.hoffmann-group.com |
Application Table
N
50
N
50
P
80
P
70
P
60
P
50
M
50
M
35
S
25
K
70
N
50
Description
Version:
High-performance micro pilot drill in two versions for general-purpose use on material, focussing on the machining of steel. Drilling and piloting can be performed in a wide range of applications, even on sloping or curved surfaces. Maximum process reliability due to exactly matching tools within the overall system. Optimum compromise between core diameter and flute size for optimum chip evacuation – even with long-chipping materials.
Note:
For reliable use of micro-drills as from 8×D, a pilot hole of at least 2×D is required using the micro stepped pilot drill No. 121222 or at least 4xD using the micro pilot drill No. 121223. For vertical machining and flat workpiece surfaces, a pilot hole can be dispensed with from DC = ⌀ 1 mm up to a length of 12×D. Please always ensure that the pilot hole is free from chips before using the subsequent drilling tool. We recommend setting a 90° counterbore with a suitable NC spotting drill after the pilot hole has been completed. The stepped pilot drill No. 121222 enables piloting and countersinking to be done in a single step. For critical applications (e.g. highest possible production accuracy, minimal burr formation, reduced coolant pressure), reduce the feed rate of the tool by 50% before entering and exiting the material. Long-chipping materials may require chips to be evacuated in steps by moving the drill back.
Please make sure that you use a suitable tool clamping device (shrink-fit chuck, hydraulic chuck) with a radial run-out
of less than 0.003 mm.
Pilot drill with expanded guide chamfer, increased metal removal rates and long service life for economical
drilling. Please ensure a sufficient coolant pressure (at least 30 bar), and sufficiently
fine filtration of the cooling agent (DC < ⌀ 2 mm with filter ≤ 0.010 mm; DC < ⌀ 3 mm filter ≤ 0.020 mm). The specified L/D ratio gives the minimum achievable depth of hole with the respective micro-drill. Flute length LC = L2 + 1.5 × DC.
Please make sure that you use a suitable tool clamping device (shrink-fit chuck, hydraulic chuck) with a radial run-out
of less than 0.003 mm.
Pilot drill with expanded guide chamfer, increased metal removal rates and long service life for economical
drilling. Please ensure a sufficient coolant pressure (at least 30 bar), and sufficiently
fine filtration of the cooling agent (DC < ⌀ 2 mm with filter ≤ 0.010 mm; DC < ⌀ 3 mm filter ≤ 0.020 mm). The specified L/D ratio gives the minimum achievable depth of hole with the respective micro-drill. Flute length LC = L2 + 1.5 × DC.