Fits your needs
HOFFMANN – 138120 1/2 – 14
Description
Technical specification
Version:
The short shank overhangs less and hence is more stable.
Application:
For use as machine tap or for cleaning existing threads by hand. Tapered Whitworth pipe thread
(BSPT) to ISO 7/1 and BS21, for joints with sealant in the thread. See the table for the specified
minimum size of the tapping hole.
Recommendation:
Tapping hole â A:
Pre-drill a plain hole without using a reamer. Variant A can be used if there is no risk of sealing
problems.
Tapping hole â B:
Pre-drill a plain hole and then ream it using a 1:16 taper reamer (see No. 162650). The taper
bore â can then be checked laterally by reference to the Dmax check dimension (see table).
Variant B for drilling the tapping hole offers the best process reliability for the tapping operation
and at the same time ensures the most reliable seal in the thread
Technical DataÂ
| Number of clamping slots | 5 |
| Thread pitch | 1.814 mm |
| Thread gauge Ă DmaxJS11 | 18.63 mm |
| Tapping hole Ă B | 17.7 mm |
| Thread Ă | 20.95 mm |
| Threads per inch | 14 |
| Tapping hole minimum depth | 22.3 mm |
| Tapping hole Ă A | 17.8 mm |
| Number of cutting edges Z | 5 |
| Shank Ă Ds | 16 mm |
| Overall length L | 80 mm |
| Shank square ⥠| 12 mm |
| Thread depth | 65 mm |
| Thread size | Rc1/2-14 |
| Coating | Uncoated |
| Thread type | Rc |
| Flank angle | 55 degrees |
| Tool material | HSS E |
| Standard | DIN 2181 |
| Thread standard | DIN EN 10226-2 |
| Taper lead form | C |
| Taper ratio | 1:16 |
| Shank | Plain shank with h9 |
| Through-coolant | no |
| Application for type of drilling | For blind holes and through holes |
| Cutting direction | Right-hand |
| Type of threading tool | Machine tap for conventional machining |
| Colour ring | Without |
| Type of product | Tap |
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