| IADC | Weight on Bit per Inch of Bit Diameter(lb/In) |
Rotary Speed (r/min) |
Cutting Structure | Applications |
| 412/415 | 1000-2000 | 90-120 | Conical on gage and inner rows | Designed for very soft formations with low compressive strength and high friablity such as shale, soft limestone, sandstone, gravel clay, soft dolimite, coal. |
| 432/435 | 1000-4000 | 90-120 | Conical/Chisel on gage, Conical inner rows | Designed for very soft formations with low compressive strength and high friablity such as shale, soft limestone, sandstone, gravel clay, soft dolimite, coal. |
| 532/535 | 2000-5000 | 80-110 | Conical/Chisel on gage, Conical inner rows | Designed for soft formations with low compressive strength and high friablity such as shale, soft limestone, sandstone, interbedded dolomite. |
| 612/615 | 3000-5000 | 60-100 | Conical/Spherical on gage, Conical inner rows | Designed for high compressive strength, medium hard and abrasive formations, such as limestone, sandstone, interbedded dolomite. |
| 632/635 | 3000-6000 | 60-100 | Conical/Spherical on gage, Conical inner rows | Designed for high compressive strength, mudium hard and abrasive formations, such as limestone, sandstone, interbedded, dolomite. |
| 732/735 | 4000-7000 | 60-90 | Spherical on gage, Conical/Double spherical on inner rows | Designed for high compressive strength, hard and abrasive formations, such as granite, limestone, sandstone, dolomite. |
| 832/835 | 5000-8000 | 50-80 | Spherical on gage, Double spherical on inner rows | Designed for high compressive strength, hard and abrasive formations, such as magnetite quartzite, quartzite, granite. |
Our drill bits are widely used in mining, oil, gas, water well drilling, HDD, quarrying and construction.
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).
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