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4 5/8" (117mm) dia. X 400mm Long Sintered Diamond Core Drill Bit 5/8-11UNC Thread


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For cutting 15 3/4" deep holes.
Only 4 left

Availability: In stock



Diamond Core Drill Bits (Sintered).


These Pro-Sintered Diamond Drill Bits are also know as Sintered Diamond Core Drill Bits or Sintered Diamond Hole Saws. These are professional quality, heavy-duty diamond drill bits designed for use on Stone, Granite, Marble, and much more. Water must be used for lubrication.

Sintered diamond drill bits are not very effective for glass type materials or softer stone materials such as slate and are not recommended for use on glass or slate. Bonded diamond bits are much more effective for those types of materials. We offer a great variety bonded diamond hole saw bits in our store.

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.

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.

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