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Article no.: 138004 1/4-28
Machine tap DIN 374, uncoated, UNF: 1/4-28
Article no.: 138002 1/4-28
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- Thread type: UNF
- Flank angle: 60
- Tool material: HSS E
- Standard: DIN 374
- Tolerance class: 2B
Product details
Technical Data
| Thread size | 1/4-28 UNF | |
| Coating | uncoated | |
| Thread type | UNF | |
| Flank angle | 60 degrees | |
| Tool material | HSS E | |
| Standard | DIN 374 | |
| Tolerance class | 2B | |
| Taper lead form | C | |
| Helix angle | 15 degrees | |
| Shank | Plain shank with h9 | |
| Through-coolant | no | |
| Application for type of drilling | up to 2×D for blind holes | |
| Cutting direction | right-hand | |
| Thread pitch | 0.907 mm | |
| Threads per inch | 28 | |
| Thread ⌀ | 6.35 mm | |
| Overall length L | 80 mm | |
| Shank ⌀ Ds | 4.5 mm | |
| Shank square □ | 3.4 mm | |
| Tapping hole ⌀ | 5.5 mm | |
| Type of threading tool | Machine tap for conventional machining | |
| Number of clamping slots | 3 | |
| Colour ring | without | |
| Number of cutting edges Z | 3 | |
| Thread depth | 12.7 mm | |
| Type of product | Tap |
Identification & Classification
| Article number |
138002 1/4-28
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|
| EAN / GTIN |
4045197595041
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| Manufacturer number |
138002 1/4-28
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|
| Manufacturer/responsible person | Hoffmann Supply Chain GmbH & Co. KG, Poststraße 15, 90471 Nürnberg, Germany, www.hoffmann-group.com |
Application Table
suitable for / [m/min]
N
ISO code:
13
suitable for / [m/min]
P
ISO code:
15
suitable for / [m/min]
P
ISO code:
15
suitable for / [m/min]
suitable for / [m/min]
Description
Version:
Sturdy design, with right-hand chip flutes.
HSS-E
Application:
For UNF uniform fine threads ASME − B1.1.