copy of UNF 1/4-28 DIN 374/40 C HSSE tapping

Technical data of 1/4-28 UNF torsion machine threader

- nominal diameter d1 - 1/4-28 UNF

- twist angle of blades - 40 deg,

- thread pitch P - 28" coils per inch,

- total length l1 - 80 mm,

- length of the working part l2 - 10 mm,

- length of the usable part l3 - 30 mm,

- diameter of the shank part d2 - 7 mm,

- size of the square driver - 5.5 mm,

- diameter of the threaded hole - 5,5 mm

- c- (2÷3) P-heading

Machine tapping 1/4-28 UNF for stainless steel, American

High-quality professional 1/4-28 UNF machine taps with reinforced shank for machine cutting of American unified threads, type UNF (fine thread). These are ¼ inch threads, 28 coils per inch. Outline type C (2 - 3 P) - for through-holes and blind holes in materials that give short chips. The threads have a triangular outline (angle of 60 degrees).

The tolerance field of the made threads is 2B. In our store we offer you high-end unified machine threaders produced according to DIN 374/40 from modern high speed steel with 5% cobalt. This unique cobalt steel influences the possibility of obtaining high efficiency of machining, shortening the time of threading a single workpiece, and thus more rational use of your workstations. In addition, our 1/4-28 UNF machine threaders are very resistant to high temperatures (up to 670 degrees C), which enables high-speed machining. The blades of the taps are resistant to mechanical damage, which significantly extends their service life.