Hollow drill called core drill

Hollow drill called core drill, magnetic drill bits, magnetic drill bits, hole saw,
Drill Category: HSS drill bits, carbide drill bits, carbide drill bit;
Cutting depth: 35MM, 50MM or 100mm;
Specifications: 12MM to 100MM; drill
The main materials are high-speed steel type; powder metallurgy; carbide classes.
Suitable Motor: magnetic ceramic tile saw  drill / magnetic drill / drill / lathe / milling machine, types, complete specifications, for a variety of brands of imported magnetic drill (magnetic drill) and general drilling, milling, boring and so on.
The products and supporting the diamond discs  use of imported magnetic drill, drilling efficiency is an ordinary drill 8 to 10 times.
Hollow drill shank common types: straight shank, universal shank, Nitto handle, handle overtone
Definition is no coring drill, according to the results of the cutting tool called names. People use as a cutting tool twist drill has been a hundred years of history, because the drill twist drill core part is entirely negative cutting angle, cutting resistance is large, so the twist drill cutting forces 50% -60% is due to drill The drill core cause. Coupled with the earlier factors, it can not do much twist drill, processing larger deeper hole drilled holes must start from the expansion step by step until the tile cutting blades  reamer size to meet the requirements so far.
The advent of the hollow drill bit cutting expanded the scope of use of a relatively small force can be processed macroporous deep, hollow drill can also do a very big size, just cutting ruler on the use of better or best Just now, not only reduces the processing costs, also considered impossible processing methods possible.