KNSh-110 (КНШ-110), KNSh-130 (КНШ-130), KNSh-160 (КНШ-160)
insert crown boring bits
Crown boring bits are designated for crushing rocks with hardness coefficient f=6...20 under Protodyakonov scale of hardness at boring wells with downhole hammers at open and underground mining works. Spline-key or bayonet connection of the crown boring bit with the downhole hammer ensures reliable fastening and quick change of tools.
Insert drill bits with pins of various arrangement may be provided with a national or imported hard alloy of increased rigidness for resistant rocks.
Insert drill bits, hardened with hard-alloy pins of spheric and parabolic shape possess increased resistance for more effective drilling, subject to local mining and geological properties of the nature..
DTH bits specifications: