4 wings step drag bits

4 wings step drag bits are one piece construction of alloy steel cast with tungsten carbide cutting tips and gauge sides to ensure longer life. It has4 wings and 4 flushing holes. 4 wings step drag bits, are more durable and lasting than 3 wings step drag bits, because of cutting structure, but will penetrate more slowly. 4 wing step drag bits are more stable and tend toward drilling a straighter hole, as its 4 wings have more stable structure and do not make a deviation in the drilling.

4 wings step drag bits are economical tools when drilling softer geological formations and shallower depths, they are primarilydesigned for soft tomedium formations, such as Clay, Loam, Silt ,Mostsoft-to-medium soilsthat have some moisture, etc.

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.

Applications

step drag bits are recommended for drilling in Mining, Exploration, Environmental, Water well, Geo Exchange, etc

Parameters

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

Thread size: 2 3/8'' API Reg, 2 7/8'' API Reg, 3 1/2'' API Reg, 4 1/2'' API Reg, 6 5/8'' API Reg, 2'' API IF, 2 3/8'' API IF, 2 7/8'' API IF, A Rod, N Rod, AW, BW, NW, AWJ, BWJ, NWJ.