Hunan TianYing Drilling Machine Manufacturing Co., Ltd. was founded in 2003, located at Zhuzhou, China, the word famous tungsten Carbide production base. We are a professional producer, and supplier of Rock Drilling Bits, all the bits crafted from the finest material available in today's market.TCI(Tungsten Carbide Insert) types are our main products, available in many sizes, designed for soft to very hard formations. With years of study and refining, our Rock Drilling Bits are preceded by extensive R&D, field tested, and backed by our unmatched commitment to service and support, our products exported to all over the world, such as Australia, North America, Middle East, North Africa and Southeast Asia etc. Today, Tianying's products have been favored and respected by domestic and foreign customers. We will continue to serve our customers with high quality products, excellent service and reasonable price.

All of our bits are manufactured according to strict standards, set forth by the American Petroleum Institute (API). And classified according to characteristics set forth by the International Association of Drilling Contractors (IADC).

IADC 7 SERIES DRILL BITS

The medium hard formation TCI tricone bits features robust chisel tungsten carbide inserts on the heel row and conical on the inner rows.

This design provides a fast drilling rate and added cutting structure durability in medium to medium hard formations.

The HSN rubber O-ring provides adequate sealing for bearing durability.

Tricone bit Cutting Structure

The durability of premium tungsten carbide inserts is improved with new formulas and new techniques for insert bit.

2. Tricone bit Gauge Structure

Multiple gauge protection with gauge trimmers on heel and gauge inserts on the gauge surface of the cone, tungsten carbide inserts and hardfacing on the shirttail increases gauge holding capability and bearing life.

3. Tricone bit Sealed Bearing Structure and Lubrication

High precision bearing with two thrust faces. Balls lock the cone.Hardface heard bearing surface. Cone bearing inlaid with friction-reducing alloy. Abrasion resistance and seizure resistance of the bearing are improved and suitable for high rotary speed. Grease compensator to maintain pressure inside the bearing and improve lubrication.

4. Tricone bit Sealed Bearing Structure

API standard threads are turned with precision machining making them concentric to the gage rows for uniform loading on bearings.