He was known to have done pioneering work on cutting tool technology .
He was was reported to have developed several machine tools including tangential - split modified point drill , retraced type Kolosov high production tools , and core drill with clamped inserts .
He was known to have done pioneering work on cutting tool technology and was reported to have developed several machine tools including tangential - split modified point drill , retraced type Kolosov high production tools , and core drill with clamped inserts .