spare parts of mining machinerytapered button bits/button bits/ ... copco/bits Xiamen Betopper Mining Machinery can manufacture the following types caaording to clients need taper:6 ... , 7,11,12 degree taper. The diameter for taper: 28, 30, 32, 34, ... requirement of the bit diameter, number of air holes, carbide button shape and the face shape. Detailed information of spare parts of mining ...