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2508_542x-1-150x150@2x

Roller bits are the most versatile rock drill tool, because its field of application covers almost all the variety of rocks: from very soft to very hard. It is not a dismountable structure consisting of welded three sections (chisel of sectional construction) or welded to the molded body of three legs (chisel of the hull structure), on the journals of which are mounted freely rotary cutters with weapons in the form of milled steel teeth or pressed carbide teeth from tungsten carbide.

Roller bit is designed for drilling explosive, hydrogeological, geological prospecting and other wells in a continuous slaughter in rocks of different hardness and fracture when cleaning the face with compressed air or air-water mixture. Chisels are widely used in the mining industry for the extraction of ores of ferrous and non-ferrous metals and other minerals.

Air bearing

Daimeter, in. (mm)SoftMediumHardVery HardPin Size
2-15/16" (74,6 mm)N-ROD
3" (76 mm)N-ROD
3-5/8" (92,1 mm)2-3/8" REG API
3-2/3" (93 mm)2-3/8" REG API
3-3/4" (95,3 mm)2-3/8" REG API
3-7/8" (98,4 mm)2-3/8" REG API
4" (101,6 mm)2-3/8" REG API
4-1/8" (104,8 mm)2-3/8" REG API
4-1/4" (108 mm)2-3/8" REG API
4-1/2" (114,3 mm)2-3/8" REG API
4-5/8" (117,5 mm)2-7/8" REG API
4-41/64" (117,9 mm)2-7/8" REG API
4-3/4" (120,6 mm)2-7/8" REG API
4-7/8" (123,8 mm)2-7/8" REG API
5" (127 mm)2-7/8" REG API
5-1/8" (130,2 mm)2-7/8" REG API
5-3/16" (132 mm)2-7/8" REG API
5-1/4" (133,4 mm)2-7/8" REG API
5-3/8" (136,5 mm)2-7/8" REG API
5-1/2" (139,7 mm)3-1/2" REG API
5-5/8" (142,9 mm)3-1/2" REG API
5-7/8" (149,2 mm)3-1/2" REG API
5-15/16" (151 mm)3-1/2" REG API
6" (152,4 mm)3-1/2" REG API
6-1/8" (155,6 mm)3-1/2" REG API
6-1/4" (158,8 mm)3-1/2" REG API
6-5/16" (161 mm)3-1/2" REG API
6-1/2" (165,1 mm)3-1/2" REG API
6-5/8" (168,3 mm)3-1/2" REG API
6-3/4" (171,4 mm)3-1/2" REG API
7-3/8" (187,3 mm)3-1/2" REG API
7-1/2" (190,5 mm)4-1/2" REG API
7-7/8" (200 mm)4-1/2" REG API
8-1/2" (215,9 mm)4-1/2" REG API
9" (228,6 mm)4-1/2" REG API
9-5/8" (244,5 mm)4-1/2" FH API
9-7/8" (250,8 mm)4-1/2" FH API; 6-5/8" REG API
10" (254 mm)4-1/2" FH API; 6-5/8" REG API
10-1/8" (258 mm)4-1/2" FH API; 6-5/8" REG API
11-5/8" (295,3 mm)6-5/8" REG API
12-1/4" (311,1 mm)6-5/8" REG API
12-5/8" (320 mm)6-5/8" REG API
13-3/4" (349,2 mm)6-5/8" REG API
15-1/2" (393,7 mm)6-5/8" FH API 7-5/8" REG API
17-1/2" (444,5 mm)7-5/8" REG API
19-19/64" (490 mm)6-5/8" FH API; 7-5/8" REG API

Sealed bearing

Daimeter, in. (mm)SoftMediumHardVery HardPin Size
4-1/8" (104,8 mm)2-3/8" REG API
6" (152,4 mm)3-1/2" REG API
6-1/8" (155,6 mm)3-1/2" REG API
7-1/2" (190,5 mm)4-1/2" REG API
7-7/8" (200 mm)4-1/2" REG API
8-1/2" (215,9 mm)4-1/2" REG API
9-7/8" (250,8 mm)4-1/2" FH API; 6-5/8" REG API
10" (254 mm)4-1/2" FH API; 6-5/8" REG API
11-5/8" (295,3 mm)6-5/8" REG API
12-1/4" (311,1 mm)6-5/8" REG API
13-3/8" (339,7 mm)6-5/8" REG API
13-3/4" (349,2 mm)6-5/8" REG API
14-3/4" (374,6 mm)7-5/8" REG API
15" (381 mm)7-5/8" REG API
15-1/2" (393,7 mm)6-5/8" FH API; 7-5/8" REG API
17-1/2" (444,5 mm)7-5/8" REG API
Soft:100-200 series IADC
Medium:300-500 series IADC
Hard:600-700 series IADC
Very Hard:800 series IADC
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