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Diamond Core Drill Bits

Diamond Drill Bit
Tile Drill Bit, Glass Drill Bit

Diamond Tip Drill Bit, Diamond Hole Saw

Diamond Drill Bits for Tile and Glass

Specifically Designed for Drilling Holes In  
  Glass Marble Limestone Slate
  Glass Jars Ceramics Porcelain Granite
  Stained Glass Ceramic Tile Porcelain Tile Stone
 

(Designed for materials to about 1/2" Thick)

Electroplate Bonded Diamond Drill Bits

Diamond Drill Bits, are also know as a Diamond Core Drill Bit, Diamond Hole Saw or Bonded Diamond Drill Bit.  They are often thought of as a Glass Drill Bit or Tile Drill Bit, but a Diamond Tip Drill Bit is much more versatile since they are used to drill glass, ceramics, porcelain, ceramic tile, porcelain tile, limestone, slate, marble, granite, light stone, and fiberglass.  Water is required for lubrication when drilling.

Old fashioned Spear Point carbide bits no longer work
on the new type of super-hard floor, counter and wall tiles.

Diamond Drill Bits are the solution.

Hole Saw style 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 bit and a smaller "plug" or "core" which comes from the center.  They are sometimes referred to as Diamond Core Drill Bits, however, technically core drill bit sizes relate to the size of the core, not the hole size.  The Diamond Drill Bits are available below 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 of each of the bits.

Space Holder Diamond tip drill bits are easy to use, however, there are many special techniques which are different from standard steel-bit drilling.  Diamond drill bit usage can also vary depending upon the type and the specific manufacturer.  To assist our customers, we have compiled a detailed Drilling Tips & Techniques section.
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Diamond Tip Drill Bits

 

Recommended Drill Speeds

DiamondSure - Bonded Bits

Recommended Drill Speed (rpm)

Material         Bit Size --> 

1/2"

1"

2"

3"

4"
 Fiberglass

1200

700

350

250

175
 Glass, Ceramic & China

800

500

250

160

125
 Limestone & Marble Stone

600

450

225

130

100
 Ceramic Wall Tile

600

450

225

130

100
 Porcelain Wall Tile

500

375

180

125

90
 Porcelain Floor Tile

500

375

180

125

90
 Granite Stone

400

300

150

100

75
(Not for use on Concrete or for depths beyond about 1/2")

SPEED KILLS:  Reduced drill speeds, low drill pressure and increased use of water lubrication will extend drill bit life considerably.
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Because diamond drill bits are used to drill in extremely hard materials, it is very important to use proper drill pressure to keep from overheating the bit.  Excessive pressure is merely converted to heat energy and can burn up a bit very quickly.
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Tile Drill Bits

Recommended Drill Head Pressure

Material

Drill Head Pressure *
 Fiberglass

10 to 15 lbs.
 Limestone & Marble Stone

12 to 18 lbs.
 Glass, Ceramic & Porcelain China

12 to 18 lbs.
 Ceramic/Porcelain Wall Tile

15 to 20 lbs.
 Porcelain Floor Tile

18 to 30 lbs.
 Granite Stone

18 to 30 lbs.
* WARNING:  Drill press arm leverages hand pressure by a factor of about 6 to 8.  So 2 lbs. of hand pressure on the drill press arm will apply about 14 lbs of pressure to the drill head.

All diamond core drill bits have shaft sizes of 3/8" or less, for use in standard drills.  For detailed drill bit size information (total length, shaft length and bell length) - See Diamond Drill Bit - Size Chart.

IMPORTANT
Diamond drill bits require the use of proper lubrication, correct
drill speed and proper pressure.  Drilling methods and techniques
vary significantly depending upon the material being drilled.
Not for use on Concrete or with Hammer-Impact Drills,
or for depths beyond about 1/2"

Please See: Drilling Tips & Techniques

 

Glass Drill Bit / Tile Drill Bit / Diamond Tip Bit

Measurements Shown Below are Outside Diameter
(Click on individual drill bit pictures for detailed specifications)

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--- Item ---

  Price
  Qty / Order?

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Glass Drill Bit
5/64"   1/8"   3/16"   1/4"

DT-502  5/64" Diamond Bit (2.0mm/.08")

    
See Detail Page for Pictures & Specs
ea  11.95
12+ 10.56
30+   8.97
90+   7.74
   

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Glass Drill Bit
5/64"   1/8"   3/16"   1/4"

DT-503  1/8" Diamond Bit (3.3mm/.13")

    
See Detail Page for Pictures & Specs
ea  12.95
12+ 11.36
28+   9.67
85+   8.44
   

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1/4" Diamond Core Drill Bit
5/64"   1/8"   3/16"   1/4"

DT-505  3/16" Diamond Drill Bit (4.9mm/.19")

    See Detail Page for Pictures & Specs
ea  13.95
10+ 12.26
26+ 10.47
80+   9.14
   

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1/4" Diamond Core Drill Bit
5/64"   1/8"   3/16"   1/4"

DT-507  1/4" Diamond Drill Bit (6.5mm/.26")

    See Detail Page for Pictures & Specs
ea  14.95
10+ 13.16
24+ 11.27
72+   9.74
   

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3/8" Glass Drill Bit
5/16"          3/8"

DT-508  5/16" Diamond Drill (8.1mm/.32")

    See Detail Page for Pictures & Specs
ea  15.95
9+  13.96
24+ 11.97
72+ 10.34
   

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3/8" Glass Drill Bit
5/16"          3/8"

DT-515  3/8" Diamond Drill (9.7mm/.38")

    See Detail Page for Pictures & Specs
ea  16.95
9+  14.96
22+ 12.77
68+ 10.94
   

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Tile Drill Bits Set
1/4", 5/16", 3/8", 1/2"
          4-Pack Assortment
                   SAVE 35% on Assortment! 
DT-590  4-Pack Diamond Bit Assortment
                   
(Sizes: 1/4", 5/16", 3/8", 1/2")

    See Detail Page for Pictures & Specs
ea  43.72
5+  40.96
12+ 38.67
26+ 36.34
   
        35% Off Individual Bits Purchased Separately!

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1/2" Diamond Tip Drill Bit for Glass
1/2"            5/8" 

DT-516  1/2" Diamond Drill Bit (12.9mm/.51")

    See Detail Page for Pictures & Specs
ea  18.95
8+  16.76
20+ 14.27
64+ 12.34
   

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1/2" Diamond Tip Drill Bit for Glass
1/2"            5/8" 

DT-517  5/8" Diamond Drill Bit (16.1mm/.63")

    See Detail Page for Pictures & Specs
ea  21.95
7+  19.36
18+ 16.47
55+ 14.24
   

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3/4" Diamond Bit
3/4"                7/8"

DT-518  3/4" Diamond Drill (19.3mm/.76")

    See Detail Page for Pictures & Specs
ea  24.95
7+  21.96
16+ 18.77
50+ 16.24
   

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3/4" Diamond Bit
3/4"                7/8"

DT-519  7/8" Diamond Drill (22mm/.87")

    See Detail Page for Pictures & Specs
ea  26.95
6+ 
23.76
14+ 20.17
45+ 17.54
   

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1" Tile Drill Bit
1"                   1-1/8"

DT-520   1"   Diamond Bit (25.7mm/1.01")

    See Detail Page for Pictures & Specs
ea  29.95
6+  26.36
14+ 22.47
45+ 19.44
   

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1" Tile Drill Bit
1"                   1-1/8"

DT-521  1-1/8" Diamond Bit (28.8mm/1.13")

    See Detail Page for Pictures & Specs
ea  30.95
6+  27.26
14+ 23.27
45+ 20.14
   

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1-1/4" Tile Drill Bit
1-1/4"                    1-3/8"

DT-524  1-1/4" Diamond Drill Bit (32mm/1.26")

    See Detail Page for Pictures & Specs
ea  33.95
5+  29.96
12+ 25.47
38+ 21.94
   

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1-1/4" Tile Drill Bit
1-1/4"                    1-3/8"

DT-525  1-3/8" Diamond Drill Bit (35mm/1.38")

    See Detail Page for Pictures & Specs
ea  36.95
5+  32.86
12+ 27.97
38+ 23.44
   

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1-1/2" Tile Diamond Bit

DT-526  1-1/2" Diamond Drill (38.4mm/1.51")

    
See Detail Page for Pictures & Specs
ea  39.95
4+  35.56
10+ 30.37
32+ 26.34
   

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1-3/4" Glass Drill Bit

DT-528  1-3/4" Diamond Bit (44.7mm/1.76')

    
See Detail Page for Pictures & Specs
ea  44.95
4+  39.96
10+ 34.17
32+  29.64
   

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2" Diamond Hole Saw Drill Bit

DT-530  2" Diamond Hole Saw (51.1mm/2.01")

    
See Detail Page for Pictures & Specs
ea  51.95
3+  46.26
8+  39.47
25+  34.34
   

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2-1/4" Tile Drill Bit

DT-534  2-1/4" Diamond Drill (57mm/2.25")

    
See Detail Page for Pictures & Specs
ea  56.95
3+  51.26
7+  43.87
24+  38.24
   

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2-1/2" Bonded Diamond Bit

DT-536  2-1/2" Diamond Bit (63.9mm/2.51")

    See Detail Page for Pictures & Specs
ea  59.95
3+  53.96
6+  46.17
20+  40.24
   

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2-3/4" Drill

DT-538  2-3/4" Diamond Drill Bit (70mm/2.76")

    See Detail Page for Pictures & Specs
ea  66.95
3+  60.26
6+  51.57
20+  44.84
   

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3" Diamond Drill Bit

DT-540  3" Diamond Hole Saw (76.5mm/3.01")

    See Detail Page for Pictures & Specs
ea  74.95
2+  67.46
5+  57.77
16+  50.34
   

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3-1/2" Bonded Diamond Bit

DT-546  3-1/2" Diamond Drill (89mm/3.51")

    See Detail Page for Pictures & Specs
ea  85.95
2+  78.46
5+  66.97
16+  58.44
   

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4" Diamond Hole Saw Drill Bit

DT-550  4" Diamond Hole Saw (102mm/4.02")

    See Detail Page for Pictures & Specs
ea  98.95
2+  89.96
5+  77.27
15+  67.34
   

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4-1/2" Tile Drill

DT-556  4-1/2" Diamond Drill (115mm/4.52")

    See Detail Page for Pictures & Specs
ea 109.95
2+ 99.96
4+  83.27
13+  69.34
   

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5" Tile Drill Bit

DT-560  5" Diamond Bit (125mm/4.9")

    See Detail Page for Pictures & Specs
ea 119.95
2+ 107.96
4+  90.27
12+  78.34
   

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5-1/2" Bonded Diamond Bit

DT-565  5"-1/2 Diamond Bit (140mm/5.51")

    See Detail Page for Pictures & Specs
ea 129.95
2+ 119.96
4+  114.27
12+  89.34
   

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See also:  Diamond Tip Drill Bit - Drilling Tips & Techniques

 

 

 

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Diamond Drill Bit

 

 

 

 

 

Diamond Tipped Drill Bit

Solid Diamond Tip Drill Bit

Electroplate Bonded Solid Diamond Tip Drill Bit

For drilling glass, stained glass, china plates & fiberglass!

Blunt Nose Diamond Tip Drill Bits work with any drill - just add water for lubrication.  Glastar brand 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 primarily a Glass Drill Bit, for use on glass, stained glass, china plates or fiberglass.

These solid point bits are not designed as a Tile Drill Bit and should not be used for drilling porcelain tile, floor tile, limestone, slate, marble, granite or other stones.  Glastar Blunt Nose Drill Bits are designed to be used at high speeds up to 10,000 rpm.

Since Glastar Diamond Tip Drill 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 solid tip drill bits drill out the complete hole, they also drill more slowly than the hollow core style 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.  Hollow core style drill bits are recommended for drilling in these very hard materials and are available from 1/8" to 4" in the section, above.  See also Diamond Core Drill Bits and How to Use Diamond Drill Bits.

--- Item ---

Price
Qty / Order?
 
TL-340  1/8" Solid Diamond Tipped Drill
                        
(Shaft size 1/8")

27.95
 
TL-341  1/4" Solid Diamond Tipped Drill
                        
(Shaft size 1/4")

28.95
 
TL-342  3/8" Solid Diamond Tipped Drill
                        
(Shaft size 1/4")

29.95
 


 

 

 

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Diamond File
Half-Circle shaft profile
shown in lower left of picture.

Diamond File

General Purpose File With 'Half-Circle' Shaft Profile

Diamond coated file is 7" long with "half-circle" shaft.  A perfect general purpose file for use on flat, rounded or curved edges.  Use on glass, stained glass, ceramic, marble, stone, fiberglass or plastic.  Blade of file is 3/8" wide, tapering to a point.  Perfect for filing off sharp edges, reshaping cuts or reaming drilled holes.  Handle is vinyl coated for safety and comfort.

DF-151  7" Diamond 'Half-Circle' File ........... ea 12.95 / 3+ 11.63 / 8+ 9.29

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How to Drill Glass




How to Use Diamond Drills

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