I Product Series of Rock Bit
1. Kx54 series, Kx64 series
2. 74 series
3. 84 series
II Data Table of Rock Bit
| Product Serries | Type | Color of Bit | Features of Rock | Examples of Rock | Recommended Weight on Bit(WOB) | Revolutions per Minute |
| Kx5---- | 0 1 2 3 4 |
Yellow | Soft rock & Medium-hard rock of low compressive strength | Shale, Sandstone, Soft limestone |
(kg/cm.c) 200-700 (1b/IN.c) 1121--5046 |
(rpm.) 80--120 |
| Kx6---- | 0 1 2 3 4 |
Green | Medium-hard rock of high compressive strength | Hard shale, Sandstone, Limestone, Dolostone |
(kg/cm.c) 500-900 (1b/IN.c) 2804--5046 |
(rpm.) 60--100 |
| Kx7---- | 0 1 2 3 4 |
Blue | Hard rock of half-abrasiveness or abrasiveness | Quartz sandstone, Hard dolostone, Granite |
(kg/cm.c) 700-1500 (1b/IN.c) 3925--8410 |
(rpm.) 50--80 |
| Kx8---- | 0 1 2 3 4 |
Red | Super hard rock of abrasiveness | Granite, Basalt, Magnetite rock, Taconite |
(kg/cm.c) 700-1500 (1b/IN.c) 3925--8410 |
(rpm.) 50--80 |
III.Corresponding table of bit size, threads and nozzle's size
| Bit Size | Connecting Threads | External Diameter of Nozzles | Assemble Length of Nozzles | Internal Diameter of Nozzles | |||||
| In. | mm | In. | In. | mm. | In. | mm. | In. | mm. | |
| 5-7/8 | 150 | API 3-1/2 Reg | 15/16 | 24 | 25/32 | 20 | 3/8 15/32 19/32 21/32 |
10 12 15 17 |
|
| 6-1/4 | 158 | API 3-1/2 Reg | 15/16 | 24 | 25/32 | 20 | |||
| 6-1/2 | 165 | API 3-1/2 Reg | 15/16 | 24 | 25/32 | 20 | |||
| 6-3/4 | 170 | API 3-1/2 Reg | 15/16 | 24 | 25/32 | 20 | |||
| 7-3/8 | 187 | API 3-1/2 Reg | 15/16 | 24 | 25/32 | 20 | |||
| 7-7/8 | 200 | API 4-1/2 Reg | 15/16 | 24 | 25/32 | 20 | 15/32 19/32 21/32 3/4 25/32 |
12 15 17 19 21 |
|
| 8-1/2 | 215 | API 4-1/2 Reg | 1-3/16 | 30 | 31/32 | 25 | |||
| 8-3/4 | 225 | API 4-1/2 Reg | 1-3/16 | 30 | 31/32 | 25 | |||
| 9-7/8 | 250 | API 6-5/8 Reg | 1-3/16 | 30 | 31/32 | 25 | |||
| 10-5/8 | 270 | API 6-5/8 Reg | 1-3/16 | 30 | 31/32 | 25 | |||
| 11 | 280 | API 6-5/8 Reg | 1-3/16 | 30 | 31/32 | 25 | |||
| 19/32 21/32 3/4 25/32 27/32 7/8 28/32 |
15 17 19 20 21 22 23 |
||||||||
| 12-1/4 | 310 | API 6-5/8 Reg | 1-11/32 | 34 | 1-3/8 | 35 | |||
| 12-3/4 | 350 | API 6-5/8 Reg | 1-11/32 | 34 | 1-3/8 | 35 | |||
| 15 | 380 | API 7-5/8 Reg | 1-11/32 | 34 | 1-3/8 | 35 | |||
IV,Coating Rock-bit for delivery
V. Derivative product
Mature technology of mining rock-bit has been introduced into the construction field to develop the combined bit and its related product for large scale project. The 800-3000mm large combined cutter-bit have achieved excellent performance in piers, cofferdams and tunnels' drilling construction.
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