Where straight hole accuracy is required in hard, abrasive ground, blade bits are ideal, as they tend to resist gauge wear better than button bits. Generally, blade bits are not as productive and yield higher drilling costs than button bits. In addition, blade bits generally require more frequent sharpening than button bits because of the less wear resistant carbide grades on the face. X-bits tend to drill round holes in all rock conditions were in certain rock conditions, cross bits tend to produce a spiraled five sided hole (especially in diameters larger than 64mm).
Bits come in Tapered or Threaded. Sizes from 32mm and up. Call for Price and Availability.