through-hole machine tap / HSS / for steel

Ruko's hand tapping tools include three models: HSS, HSSE Co-5, and HSS Tin.

The first model consists of a heavy-duty, high-speed steel. It is used for threads in malleable, unalloyed steels with a maximum strength of 800 N/mm?. The unit can cut the thread within one operation.

The other model, HSSE Co-5, is composed of 5% cobalt alloyed high-speed steel. It has a heat-resistant property which ensures a longer service life. The model is applicable for use in through threads and bottoming threads in unalloyed and alloyed steels up to a strength of 1000 N/mm?.

The last model is made out of a heavy-duty, high-speed steel material. It was manufactured with a titanium nitride coating. The model is made for use on a wide range of equipment.