On-Line Catalog
Diamond Drill Bits

Diamond Core Drill Bits

Diamond Hole Saws

Diamond Glass File

Blunt Nose Drill Bits

Drilling Tips & Techniques

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Diamond Core Drill Bits /
Diamond Hole Saws

HK brand Diamond Core Drill Bits, also know as Diamond Hole Saws, are used on glass, ceramics, ceramic tile, porcelain, porcelain tile, limestone, slate, marble, granite, stone, and fiberglass.  Just add water for lubrication.

Core drill bits have a hollow center and cut a circle in the material to create a hole. This results in a hole the size of the drill and a smaller "plug" or "core" which comes from the center.  Diamond core drill bits are available in sizes from 5/64" to 5-1/2" (outside diameter).  The metric manufactured size of each bit is also shown below (mm), along with the exact inch measurement.

Diamond drill bits are easy to use, however, there are many techniques which are different from standard steel-bit drilling.  To assist our customers, we have compiled a detailed Drilling Tips & Techniques section. <Click Here>

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Blunt Nose Diamond Drill Bits
Electroplate Bonded Blunt Nose Diamond Drills
For glass, stained glass, china plates, & fiberglass!

Blunt Nose Diamond Drill Bits work with any drill - just add water for lubrication.  Glastar brand Diamond Drill Bits are much easier and safer to use than old-fashioned spear point steel drills and don't chip the work material.  Blunt Nose Diamond Drill Bits are used primarily on glass, stained glass, china plates or fiberglass.  Glastar Blunt Nose Drill Bits are designed to be used at high speeds up to 10,000 rpm.

Since Blunt Nose bits have a solid rounded tip, they are slightly easier to start when drilling on a curved surface, such as a bottle, when compared to using a Core drill bit, above.  However, since Blunt Nose bits drill out the complete hole, they also drill more slowly than the Core bits and they are generally not used on the super hard abrasive materials such as ceramic or porcelain tile, floor tile, limestone, slate, marble, granite or other stones.  Blunt nose bits are available in three sizes, 1/8", 1/4" and 3/8".  Core drill bits from 1/8" to 4" are also available - see section, above.  See also How to Use Diamond Drill Bits.

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Diamond Glass File
With 'Half-Circle' Shaft Profile

Diamond coated file is 6-1/2" long with "half-circle" shaft for use on flat, rounded or curved glass edges.  Blade of file is 3/8" wide, tapering to a point. Perfect for filing sharp edges off glass, reshaping cuts or reaming drilled holes.  Handle is vinyl coated for safety and comfort.

DT-571  Diamond 'Half-Circle' File ................................. each 17.95