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Description
Technical data for the 1 1/2-12 UNF machine tap
| Technical data | |
|---|---|
| nominal diameter d1 | 1 1/2-12 |
| thread pitch P | 12 threads per inch |
| overall length l1 | 170 mm |
| flute length l2 | 30 mm |
| shank diameter d2 | 28 mm |
| square drive size a | 22 mm |
| tap drill diameter | 36 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. There is 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 reversed out. The UNF 1.1/2-12 tap has a reduced shank in accordance with DIN 374: diameter 28 mm, square 22 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 1.1/2-12 thread has 12 threads per inch; the feed is approximately 2.117 mm/rev.
1 1/2-12 UNF American fine-thread machine tap
High quality 1.1/2-12 UNF machine tap with an extended shank for cutting American Unified inch threads. Thread type UNF – fine pitch, diameter 1 1/2, 12 threads per inch. Tolerance class 2B, form C chamfer – for through holes and blind holes with a long thread runout.
Our Unified machine taps offer high hardness and durability. They are designed for tapping holes in hard and difficult-to-machine materials in classes P1.2 – P1.3. Even when cutting at high speeds and temperatures, the cutting edges do not dull and resist breakage, cracking, edge fracture, and chipping. These 1 1/2-12 UNF machine taps also allow machining time to be reduced, thereby lowering labor costs and improving utilization of existing machine tools.
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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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