Spherical PDC cutter insert Manufacturer PDC bit insert for petroleum drilling,Oil bit roller bit,button bit,DTH bit,air hamme Spherical PDC Mainly used for Roller bits,DTH bits,Button bits etc. percussion drillingWe can supply 1016,1118,1217,1318,1621,1926 etc as requested. Advantage of Spherical polycrystalline diamond compact PDC insertA. Selected higher quality diamond powder, improved the ...