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Description
Technical data for the 1-inch UNC machine tap with 8 threads per inch
| Technical data | |
|---|---|
| nominal diameter d1 | 1-8" |
| thread pitch P | 8 threads per inch |
| overall length l1 | 160 mm |
| flute length l2 | 38 mm |
| working length l3 | 30 mm |
| shank diameter d2 | 20 mm |
| square drive size | 16 mm |
| tap drill diameter | 22.25 mm |
| Chamfer | C (2÷3) P |
| Cutting edge helix angle | 35° |
How a spiral flute tap evacuates chips from a blind hole
The 35° flute works like a screw conveyor
The flutes of this tap spiral to the right at an angle of 35° to the axis. The tap rotates clockwise and advances into the hole. Chips cut by the chamfer enter the flute, and the helix carries them upward, like the auger in a meat grinder. The bottom of the hole stays clear, and the cutting edges do not encounter compacted chips. The UNC 1-8 tap has a reduced shank according to DIN 376: diameter 20 mm, square size 16 mm.
1
The 35° spiral flute carries chips upward from the chamfer.
2
The stepped chip exits the hole and breaks into short pieces.
3
The tap rotates clockwise to cut a right-hand thread.
4
Chamfer C: 2–3 incomplete threads on the tapered lead.
5
Clearance below the tap tip – min. 2 thread pitches above the bottom.
6
The UNC 1-8 thread has 8 threads per inch; the feed is 3.175 mm/rev.
1-inch UNC American machine tap with 8 threads per inch for stainless steel
Professional 1-8 machine tap UNC with an extended shank for cutting Unified coarse threads (standard pitch), type UNC 1-8. Tolerance class 2B, form C chamfer – for blind holes with a short thread runout. The tools comply with DIN 376. Our Unified machine taps are designed for both hobby and professional machining. They withstand demanding operating conditions, particularly the high temperatures generated during high-speed tapping. These 1-8 UNC machine taps are made from modern HSSE (High Speed Steel), whose properties enable highly productive machining and shorter machining times. Another advantage of the taps is the resistance of their cutting edges to breakage, cracking, edge fracture, chipping, and other mechanical damage.
Product accessories
Metal drill bit 22.25 NWKc HSS DIN 345 Werko
Reference: 10480 In stock > 10 items
€23.68
€29.13 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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