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Description
Technical data for the 5/8-18 UNF spiral flute machine tap
| Technical data | |
|---|---|
| nominal diameter d1 | 5/8-18 |
| thread pitch P | 18 threads per inch |
| overall length l1 | 100 mm |
| flute length l2 | 20 mm |
| shank diameter d2 | 12 mm |
| square drive size a | 9 mm |
| tap drill diameter | 14.5 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 5/8-18 tap has a reduced shank in accordance with DIN 374: diameter 12 mm, square 9 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 5/8-18 thread has 18 threads per inch; the feed is approximately 1.411 mm/rev.
5/8-18 UNF American machine tap for blind holes
Modern 5/8-18 UNF machine tap for cutting American Unified Fine threads. These are inch-based fine threads of the UNF type. Thread diameter 5/8 inch, 18 threads, with a tolerance class of 2B for the finished threads. Triangular thread profile. These taps are manufactured from advanced HSSE high-speed steel.
This material has exceptional cutting properties that directly affect tapping quality. In particular, the Unified thread machine taps offered can be used under demanding conditions. They are suitable for high-speed tapping, which generates high temperatures of up to 600°C. In addition, our 5/8-18 UNF machine taps offer high machining productivity, resulting in faster tapping of individual components and thus more efficient use of available workstations. The taps are intended for machining unalloyed steels, metals, nonferrous metals, metal alloys, and other materials.
Product accessories
Hand tap UNF 5/8-18 DIN 2181/2 HSS 2B
Reference: 0000006470 In stock > 10 items
€15.79
€19.42 brutto
HSSE 14.5 cobalt metal drill bit DIN 338
Reference: 13337 In stock > 10 items
€11.05
€13.59 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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