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Article code:
EAN / GTIN:
Manufacturer number:
NC reamer H7, uncoated, Nominal ⌀ DC mm or inch: 7,8
Article no.: 162900 7,8
Article code:
- Tolerance: H7
- Tool material: HSS E
- Standard: Manufacturer’s standard
- Through-coolant: no
- Shank: DIN 1835 A to h6
Product details
Technical Data
| Nominal ⌀ DC | 7.8 mm | |
| Coating | uncoated | |
| Tolerance | H7 | |
| Tool material | HSS E | |
| Standard | Manufacturer’s standard | |
| Through-coolant | no | |
| Shank | DIN 1835 A to h6 | |
| Application for type of drilling | for through holes | |
| Flute length Lc | 33 mm | |
| Overhang L1 | 80 mm | |
| Overall length L | 117 mm | |
| Number of cutting edges Z | 6 | |
| Shank ⌀ Ds | 8 mm | |
| Feed f in steel < 750 N/mm2 | 0.2 mm/rev. | |
| Reaming oversize in diameter | 0.1 mm - 0.2 mm | |
| Shank tolerance | h6 | |
| Colour ring | green | |
| Type of product | Phillips bit |
Identification & Classification
| Article number | 162900 7,8 | |
| EAN / GTIN | 4045197090539 | |
| Manufacturer number | 162900 7,8 | |
| Manufacturer | Hoffmann Supply Chain GmbH & Co. KG, Poststraße 15, 90471 Nürnberg, Germany, www.hoffmann-group.com |
Application Table
N
20
N
20
P
15
P
10
P
7
P
5
P
4
M
5
M
5
S
5
K
5
N
13
Description
Version:
Version suitable for NC similar to DIN 212 with straight shank ⌀ for standard chucking especially in hydraulic chucks or high precision collet chucks. For highest concentricity and process reliability. No need to order special collets.
With long flutes and left-hand helix.
≤ ⌀ size 1.7 with 3 teeth; ≥ ⌀ size 1.8 even number of teeth and irregular spacing. ≤ ⌀ size 3.7 both ends with centre points; ≥ ⌀ size 3.8 both ends with centre holes.
Reamer manufacturing or cutting edge tolerance to DIN1420 for H7 bore tolerance.
With long flutes and left-hand helix.
≤ ⌀ size 1.7 with 3 teeth; ≥ ⌀ size 1.8 even number of teeth and irregular spacing. ≤ ⌀ size 3.7 both ends with centre points; ≥ ⌀ size 3.8 both ends with centre holes.
Reamer manufacturing or cutting edge tolerance to DIN1420 for H7 bore tolerance.