Electroplated Diamond Core Drill Bits

Ideal for trades people, handy people and DIY for cutting glass, china, fibreglass, pottery, marble, porcelain tiles, granite, travertine, blue stone, fibre cement, poly carbonates  and more. Our bits use a finer diamond than the ones you find in big hardware stores, so will cut better. See instructions for use at bottom of this page (also supplied with core bit).

Supplied with a hex shank, so will fit most drills.
These are to be used in rotary mode only ie not hammer drill.

These bits can be purchased individually (6 - 108mm).
Or we stock the HDEMK8 kit  -  8 Piece kit with drill guide (4, 5, 6, 7, 8, 10 & 12mm bits). 
$87 incl GST

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Part No

Diameter

Sell Price

Part No

Diameter

Sell Price

Part No

Diameter

Sell Price

HDEM6

6mm

$30

HDEM35

35mm

$72

HDEM75

75mm

$167

HDEM7

7mm

$31

HDEM37

37mm

$76

HDEM77

77mm

$175

HDEM8

8mm

$31

HDEM42

42mm

$87

HDEM82

82mm

$187

HDEM10

10mm

$31

HDEM44

44mm

$92

HDEM85

85mm

$195

HDEM12

12mm

$31

HDEM50

50mm

$105

HDEM86

86mm

$200

HDEM13

13mm

$32

HDEM51

51mm

$106

HDEM88

88mm

$208

HDEM16

16mm

$35

HDEM52

52mm

$110

HDEM89

89mm

$213

HDEM19

NLA

NLA

HDEM60

60mm

$128

HDEM90

90mm

$220

HDEM20

20mm

$42

HDEM63

63mm

$136

HDEM95

95mm

$237

HDEM25

25mm

$51

HDEM67

67mm

$145

HDEM105

105mm

$242

HDEM32

32mm

$65

HDME69

69mm

$151

HDME108

108mm

$245

Pilot bit for this range - $8 incl GST (a pilot drill is included with all barrels that need them ie 19mm and above)

Suction Ring Set 38mm & 75mm 
Water containment for wet drilling.
Push the ring down on a flat, smooth horizontal surface and fill with water.
$20 incl GST each - ex stock
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Dymaxion diamond hole enlarger - 35mm diameter. 
Used to enlarge an existing hole.
Suitable for most building materials including porcelain and stone. 
Will also grind irregular shapes and rebates.
10mm hex shank, 25mm diamond coating.
Attach to drill and slowly rotate in anti clockwise direction, using firm pressure. 
HDEE35 $99 incl GST
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Instructions for using electroplated core bits:

Fit the hex shank fully into the drill chuck and tighten.

Use appropriate personal safety equipment - safety glasses, hearing protection etc

Use slow speed drills. A battery drill is much safer with water than an electric one. If using an electric drill, ensure you use an RCD to prevent electrocution.

Check our drill chart below for recommended speed.

Core bit diameter 12mm 25mm 50mm  75mm  90mm 
Fibreglass  1200rpm  700rpm  350rpm  250rpm  175rpm
Glass & china  800rpm  500rpm  250rpm 160rpm  125rpm
Pottery tile & marble 600rpm  450rpm   225rpm  130rpm  100rpm
Porcelain tile  500rpm 375rpm   180rpm  125rpm 90rpm 
Granite  400rpm  300rpm  150rpm  100rpm  75rpm

Clamp the material to be drilled firmly. Never hold the material with one hand while drilling with the other!

Apply plenty of water.  Some objects can be barely immersed in water (beware water in the drill). Or try one of our water suction ring sets - see here

Use only medium drilling pressure. The smaller the diameter, the less pressure is needed (otherwise you will damage the core bit).

Withdraw bit regularly to allow cooling, allow water inside the hole and to clear debris.

A pilot drill bit is provided on larger diameter bits, but a simple template guide is just as fast. Or use the drill guides, below.

Be aware that porcelain and glass may fracture and these can be very sharp.

Core bit damage will occur if:
 - the drill bit gets too hot to touch
 - drill speed is too high
 - insufficient cooling water
The diamond crown will turn blue and the diamonds will strip off. This is not warranty, so follow these guidelines.

Drill Guides: Drilling holes in stone tiles or other hard, smooth surfaces is often hard to start, especially when working with the lubricants necessary for diamond hole cutters/drill bits. This drilling guide is designed to hold your bit steady so you can start the hole in the right spot without slipping or sliding. Both use a 120mm suction cup

Plastic (red): 8-80mm, with water injection point (for lubrication when drilling) $15

Steel (blue): 8mm to 54 mm $25

(Pictures show two guides in each photo - prices are for 1 each)

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Truacut electroplated Diamond Jig saw blades.
They are:
 - 2 blades per pack
 - 50mm cut length
 - 30 grit
 - universal fitting (so fit most AEG, Bosch, Dewalt, Festo, Rok, Hitatchi, Makita, Metabo etc jigsaws).

They are suitable for cutting:
 - ceramics
 - tiles
 - fibreglass
 - compressed fibre board
 - cement
 - light bricks.
Electricians use these to cut fibre cement board for down lights. (Part number S130DG/2).

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Please see our "Contact Us" page (here) for Australia wide shipping information.

Prices correct as of 1/9/20 but subject to change.

Disclaimer: the information on this website is provided in good faith and believed to be reliable and accurate at this time. However, the information is provided on the basis that the reader will be solely responsible for assessing the information and its veracity and usefulness. UDT shall in no way be liable, in negligence or howsoever, for any loss sustained or incurred by anyone relying on the information, even if such information is or turns out to be wrong, incomplete, out-of-date or misleading.

Dymaxion HDEM6 Sutton Bunnings
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-32.1112554,115.8192428

United Diamond Tools

Unit 10 / 84 Barberry Way
Bibra Lake
Perth
Western Australia 6163

Telephone: (08) 9434 6878
Mobile: 0419 901 533

Email:  sales@udt.com.au