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Description
Technical data for the 3/4-16 UNF machine tap for through holes
| Technical data | |
|---|---|
| nominal diameter d1 | 3/4-16 |
| thread pitch P | 16 threads per inch |
| overall length l1 | 110 mm |
| flute length l2 | 24 mm |
| shank diameter d2 | 14 mm |
| square drive size | 11 mm |
| tap drill diameter | 17.5 mm |
| Chamfer | C (2÷3) P |
| Cutting edge helix angle | 40° |
How a spiral flute tap evacuates chips from a blind hole
The 40° flute works like a screw conveyor
The flutes of this tap spiral to the right at an angle of 40° to the axis. The tap rotates clockwise and advances into the hole. The chip cut by the chamfer enters the flute, and the helix carries it upward like the auger in a meat grinder. The bottom of the hole stays clean, and the cutting edges do not encounter packed chips. The UNF 3/4-16 tap has a reduced shank in accordance with DIN 374: diameter 14 mm, square 11 mm.
1
The 40° 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 UNF 3/4-16 thread has 16 threads per inch; the feed is approximately 1.588 mm/rev.
3/4-16 UNF American spiral flute machine tap
Professional machine tap with an extended shank, compliant with DIN 374/40. Intended for cutting American Unified Fine threads (with a fine pitch). Thread type UNF, diameter 3/4, 16 threads per inch. Chamfer type C – for through and blind holes in short-chipping materials. Finished thread tolerance class 2B. Our Unified thread machine taps are made from very high-quality high-speed steel with 5% cobalt added. This steel has exceptional cutting properties. In particular, it enables significantly higher cutting productivity, thereby reducing machining time. This allows more efficient use of available workstations and lowers machining costs. In addition, the machine taps offered withstand very demanding cutting conditions, including high temperatures of up to 670°C. They can tap components made from alloy steels, stainless steel, heat-resistant steel, acid-resistant steel, cast iron, cast steel, and other hard materials.
Product accessories
HSSE 17.5 cobalt metal drill bit DIN 338
Reference: 13297 In stock > 10 items
€17.11
€21.04 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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