BI center bit is used for reaming hole bottom, the model No. likes 5 7/8″*7 1/2″*4 3/4″ or just 5 7/8″*7 1/2″ as the third diameter is not important.

5 7/8″ is the passing through diameter, 7 1/2″ is the reaming diameter, 4 3/4″ is the diameter of front bit.

We can produce both matrix body and steel body BI center bit, the cutters could be diameter 8mm, 13mm, 16mm, 19mm, blades quantity ranges from 3 to 8.

Order procedure :

1>Confirm 3D design.

2>Trial order.

3>Testing and improvment.

4>Mass production.

If the requirement is regular, we have mature design according to various of drilling conditions.