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Description
Technical data for the 1-12 UNF machine tap
| Technical data | |
|---|---|
| nominal diameter d1 | 1 inch |
| thread pitch P | 12 threads per inch |
| overall length l1 | 140 mm |
| flute length l2 | 27 mm |
| shank diameter d2 | 18 mm |
| square drive size | 14.5 mm |
| tap drill diameter | 23.25 mm |
| Chamfer | C (2÷3) P |
Where chips remain in a straight-flute tap
The flute holds the chips until the tap is reversed out
The straight flute runs parallel to the tap axis. It has no helix to carry chips upward. The chamfer cutting edges are not ground at an angle, so they do not push chips downward. Short chips break into fragments and remain in the flute beside the cutting edges that produced them. They leave the hole only when the tap is backed out. The UNF 1-12 tap has a reduced shank according to DIN 374: diameter 18 mm, square size 14.5 mm.
1
Straight flute – chips remain in the flute, next to the cutting edges that produced them.
2
Chamfer C: 2–3 incomplete threads on the tapered lead.
3
The tap rotates clockwise to cut a right-hand thread.
4
Individual fragments exit at the top, onto the workpiece surface.
5
A few fragments fall below the tip and exit through the bottom of the hole.
6
The UNF 1-12 thread has 12 threads per inch; the feed is approximately 2.117 mm/rev.
1-12 UNF American machine tap
High-quality machine taps 1-12 UNF for cutting American Unified threads. These are UNF fine threads with a diameter of 1 inch and 12 threads per inch. The tolerance class of the threads produced is 2B. The thread profile is triangular, with a 60° angle. Our Unified machine taps are manufactured according to DIN 374 (reduced shank). They offer high cutting performance due to the special HSSE molybdenum-cobalt high-speed steel used in their manufacture. Its properties directly affect cutting quality and, above all, machining productivity, accuracy, and resistance to demanding operating conditions.
Thanks to high-speed steel (HSS), our 1-12 UNF fine-thread machine taps withstand even the high cutting temperatures generated during high-speed tapping. They are suitable for machining components made from unalloyed steel, metals, metal alloys, plastics, and nonferrous metals.
Product accessories
Metal drill bit 23.25 NWKc HSS DIN 345 Baildon
Reference: 0379 In stock > 10 items
€27.63
€33.99 brutto
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Shipping
All orders are delivered by courier company GLS. For orders exceeding 369 PLN gross shipping is FREE
| Courier GLS | Przelew24 / Prepayment | 14,76 zł gross | Delivery time 1 working day |
| Courier GLS | Cash on delivery | 17,26 zł gross | Lead time 1 working day |
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