SINODRILLS 3 wings air flush step drag bits

3 wings air flush step drag bits are one piece construction of alloy steel forged or cast with Tungsten Carbide cutting tips and gauge sides to ensure longer life. This step drag bits have 3 wings and 9 air flushing holes. Its wings distribute in the body of bit equably and the angle between each wing is 120 degree. Size of their 3 steps in the wing gradually becomes small, which can increase penetration ability and propulsive force. More flushing hole can improve capability of debris flushing .

Features

• A solid one piece heat treated, 4140 alloy steel body for bit strength & durability;

• CNC threaded machining for proper installation &use;

•  Forgings are milled to better seat the carbide inserts.

• Select tungsten carbide inserts 5.5mm thick are standard.

•  Relief is hand ground behind carbide inserts for maximum performance.

Parameters

Note: The diameter and thread showed as above are usual size, other sizes are available upon request.