Pro-Sintered Diamond Drill Bits for Granite, Tile & Stone

Tip view shows the 3mm thick
sintered diamond segments on
tip of bit of the 2" size bit.

Sintered diamond drill bits have the diamonds embedded into the metal of the drill bit tip rather than merely "bonded" to the tip as with bonded diamond drill bits.  As the tip wears down on a sintered diamond drill bit, new diamonds come to the surface.  The tip sidewall of DiamondSure Pro-Sintered Diamond Drill Bits is 2mm thick on the smaller size bits (1" and below) and increases to 2.5mm to 3mm thick on larger size bits.

Sintered diamond drill bits are heavy-duty bits designed for long life.  Generally, sintered bits will have a long life of 20 to 30 or more times the life of a bonded diamond drill bit, if used properly.  The heavy-duty design provides long life when drilling in very hard materials such as porcelain tile, granite and hard stones.  However, there are some disadvantages.  Sintered bits are more costly than bonded diamond bits and the thick heavy-duty tip causes them to drill more slowly than thin-wall bonded diamond drill bits.  However, for continued drilling in hard mateirals, the higher cost of the Sintered bits is well worth bcause of the longer life.

Diamond drill bits are easy to use, but there are many drilling techniques that are different from standard steel-bit drilling.  Diamond drill bit usage can also vary depending upon the diamond drill bit type and the specific manufacturer.  To assist our customers, we have compiled a detailed Drilling Tips & Techniques section.