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Article code:
EAN / GTIN:
Manufacturer number:
Cat. No.:
HOLEX Pro Tap machine tap HSS-E, TiN, UNC: 1/4-20
Article no.: 178377
Catalog no.: 137910
Article code:
Product details
Technical Data
| Through-coolant | no | |
| Cooling lubricant | yes | |
| Series | Pro Tap | |
| Interface position | on the machine | |
| Holder type | plain shank | |
| Shank diameter DS | 7 mm | |
| Thread type | UNC | |
| Nominal diameter of metric thread D | 6.35 mm | |
| Nominal diameter of thread (inches) D | 0.25 in | |
| Thread D | 1/4-20 UNC | |
| Thread pitch | 1.27 mm | |
| Turns per inch | 20 | |
| Thread tolerance class | 2B | |
| Length of tapping part Lc | 15.9 mm | |
| Taper lead angle | 15 degrees | |
| Number of teeth | 2 | |
| Twist direction | right-hand | |
| Twist angle | 40 degrees | |
| Type of thread-cutting tool | machine tap for dynamic machining | |
| Taper lead form | C | |
| Application for type of drilling | blind hole | |
| To depth (x diameter) | 2.5 | |
| Number of clamping slots | 2 | |
| Core hole diameter | 5.1 mm | |
| Flank angle | 60 degrees | |
| Square-drive width across flats □ | 5.5 mm | |
| Tool material | HSS-E | |
| Machining group | P (steel) | |
| Cutting media, manufacturer’s designation | HSS-E | |
| Coating | TiN | |
| Interface | joint 1 | |
| Overall length L | 80 mm | |
| Cutting direction | right-hand cutting | |
| Standard | DIN 371 | |
| Data carriers | without data carrier | |
| Machining method | thread processing internal (EGI) | |
| Colour ring | green | |
| Type of product | taps |
Identification & Classification
| Article number | 178377 | |
| Catalog number | 137910 | |
| EAN / GTIN | 4062406374839 | |
| Manufacturer number | 137910 1/4-20 | |
| Manufacturer/responsible person | Hoffmann Supply Chain GmbH & Co. KG, Poststraße 15, 90471 Nürnberg, Germany, www.hoffmann-group.com |
Application Table
N
24
N
25
N
10
P
24
P
20
P
15
P
8
M
8
N
15
Description
Version:
HOLEX Pro Tap general-purpose tap. Sturdy design suitable for a wide spectrum of materials. Improved HSS-E tool material with low-friction TiN coating.
Application:
For UNC uniform coarse threads ASME − B1.1.