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).
(For longer lasting, professional series bits, see the seperate page on "Granite, Porcelain and Polymer Concrete core bits" page here.)
Supplied with a hex shank, so will fit most drills with a chuck (not SDSPlus or Max).
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
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 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)
Truacut electroplated Diamond Jig saw blades. They are suitable for cutting: |
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Please see our "Contact Us" page (here) for Australia wide shipping information.
Prices correct as of 1/11/20 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
United Diamond Tools
U9, 84 Barberry Way
Bibra Lake
Perth
Western Australia 6163
Telephone: (08) 9434 6878
Mobile: 0419 901 533
Email: sales@udt.com.au