China R28 Button Bit for Drifting Tunneling

Sansung rock drilling thread button bits are widely used in all kinds of mining, drilling, quarrying, engineering, construction, water well drilling, oil exploring industries etc.
Our thread button bits are made with high quality of best quality alloy steel bar and tungsten carbides with superior wear resistance and impact toughness superior, through heat treatment so that it can withstand the toughest rock drilling demands, and transmit intensive impact energy into the rock with the least possible loss of energy.
Features:Thread connection: R25, R28, R32, R38, T38, T45, T51, ST58, GT60 and ST68.Carbide profile: Spherical, ballistic and parabolic.Bit Faces: flat, concave, convex and drop-center, uniface.Bits Diameters: 33mm-127mmBit body: standard and retrac
Thread Button BitDiameterCarbide size(mm)Flushing holeWeightmminFrontGaugeFrontSide(kg)QtyxsizeQtyxsizeR25 (1")331 19/642x75x7110.36351 3/82x75x8110.44381 1/22x75x9110.56411 5/82x85x9120.61451 3/42x85x10120.78481 7/82x95x11120.85122x105x11121.18572 1/42x105x12121.26R28 (1 1/8")351 3/82x75x8110.44381 1/22x75x9110.56411 5/82x85x9120.61451 3/42x85x10120.78481 7/82x95x11120.85122x105x11121.18572 1/42x105x12121.26R32 (1 1/4")412 5/82x85x9120.65431 11/162x85x10120.72451 3/42x95x10120.82481 7/82x105x10120.925122x105x11121.24572 1/22x105x12121.35R/T38 (1 1/2")642 1/23x116x12211.62702 3/44x108x10211.987634x118x12212.28893 1/26x118x12223.32T45 (1 3/4")702 3/44x108x10212.247634x118x12212.46893 1/26x128x14223.5210247x128x14224.461154 1/28x128x14226.68T51 (2")7634x128x12213.62893 1/26x128x14224.4810247x128x14415.261154 1/28x128x14417.6212759x128x16418.58ST58 (2 1/4")893 1/26x128x14225.4610246x128x14226.18GT60 (2 3/8")10246x138x144-7.41154 1/27x149x163-9ST68 (2 3/4")10246x148x16228.61154 1/26x149x163-11.2