drill coring range

 At present all of our minimum core drill coring range are 12MM and above, with the largest on the magnetic drill
Drill diameter reached 160MM, if the concrete diamond blades  aperture is small, then I recommend using ordinary twist drill instead. Relatively speaking Why core drill so small it can not do? First, the tile blade  holes by drilling, twist drill has been able to deal with common good. In contrast, the twist is much lower than the cost of the hollow drill bit, drill steel so we did not do the smallest aperture so small. Then why do we do it rail bricks? In fact, in order to solve our twist open a large hole encountered much resistance and developed, so long as we understand this, we also know that, in fact, there is an important reason that the grinding cup wheel  smaller the aperture, But we take the three core drill blade tip the higher requirements, so the production cost would be a corresponding increase, compared to the twist drill, this is definitely select twist drill more.