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Article code:
EAN / GTIN:
Manufacturer number:
Cat. No.:
Centre drill HSS R, uncoated, Nominal ⌀ DC k12: 3,15mm
Article no.: 239451
Catalog no.: 111350
Article code:
Product details
Technical Data
| Through-coolant | no | |
| Cooling lubricant | no | |
| Holder type | Plain shank | |
| Holder shape | Standard | |
| Holder version | metric | |
| Holder tolerance class | h7 | |
| Shank diameter | 8 mm | |
| Shank length | 25 mm | |
| Cutter diameter, min. | 3.15 mm | |
| Cutter diameter, max. | 3.15 mm | |
| Configurable | no | |
| Tolerance of cutter diameter | tolerance class ISO | |
| Tolerance class ISO | k12 | |
| Index of step | 1 | |
| Cutter diameter step | 3.15 mm | |
| Flute length | 15.5 mm | |
| Distance from cutter corner to cutter tip | 0.95 mm | |
| Number of teeth | 2 | |
| Twist direction | right-hand | |
| Helix angle, min. | 5 degrees | |
| Angle, 1st step | 118 degrees | |
| Countersink radius | 8 mm | |
| Countersink angle | 60 degrees | |
| Centre drill shape | R | |
| For min. workpiece diameter | 30 mm | |
| For max. workpiece diameter | 40 mm | |
| Type of drilling tool | centre drill, double-sided | |
| Product designation (type) | R | |
| Tool material | HSS | |
| Machining group | K (cast iron); M (stainless steel); N (non-ferrous metals); P (steel) | |
| Cutting media, manufacturer’s designation | HSS | |
| Coating | uncoated | |
| Interface | joint 1; joint 1 | |
| Gauge length | 25 mm | |
| Usable length | 8 mm | |
| Overall length | 50 mm | |
| Weight | 15 g | |
| Cutting direction | right-hand cutting | |
| Tool version | solid steel | |
| Standard | DIN 333 | |
| Shape letter standard number | R | |
| Machining method | drilling into solid material | |
| Colour ring | without | |
| Type of product | centre drill | |
| Content | single part |
Identification & Classification
| Article number | 239451 | |
| Catalog number | 111350 | |
| EAN / GTIN | 4045197000668 | |
| Manufacturer number | 111350 3,15 | |
| Manufacturer/responsible person | Hoffmann Supply Chain GmbH & Co. KG, Poststraße 15, 90471 Nürnberg, Germany, www.hoffmann-group.com |
Application Table
N
70
N
45
P
40
P
30
P
25
P
10
P
8
N
80
Description
Version:
Ground from solid and relief ground, spiral fluted.
Centre drill with radius form R:
Centre drill with radius form R:
- The radius curve eliminates the sharp transition from drill point to countersink angle that is present on form A, so the risk of fracture is reduced.
- In the event of angular misalignment of the lathe centre, the ring bearing face avoids the component running only on the external or internal edge of the bearing face. Even if the lathe centres are not in line, good support is provided.