Blade Adaptors

We have a large range of adaptors to reduce your diamond blade centre hole to the size you need. Smaller sizes are included at no charge with your blade when purchased from us, but they are also sold separately. Contact us with the size adaptor you need, as well as it's thickness.
** Always ensure your blade flanges will clamp the adaptor in place - otherwise the adaptors may come out when used with dished flanges **
Common sizes are:
 7/8" (22.23mm) to 20mm
1" (25.4mm) to 7/8" (22.23mm)
1" (25.4mm) to 20mm
30mm to 1" (25.4mm)
30mm to 7/8" (22.23mm)
50mm to 1" (25.4 mm)

We also stock extra thick adaptors to suit Stihl : 1" (25.4mm) to 20mm
$15 ea incl GST

Bordo Circular Saw Blade Bushes kit:
Part number 7452-BA
1 each of:
30mm - 1"; 30 - 25mm; 30 - 16mm; 25 - 22.2mm; 25 - 20mm; 25 - 16mm; 20 - 16mm; 20 - 10mm.
$8.50 incl GST

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Note - Adaptors usually slide into place with finger pressure.
If adaptor is tight in centre hole, fully support blade in the centre, and use only light taps to hammer in, so as not to bow the blade.
If adaptor is loose in centre hole, a bit of thread locker will hold them in place.
The adaptors are just a guide for the centre shaft - it is the flanges that actually hold the blade.

Dressing stones

Our dressing stones "open up" a diamond blade which have been glazed up as a consequence of cutting hard materials. Depending on the condition (wear) of your diamond blade, it will be necessary to use the dressing stone several times, simply by cutting a few centimeters into it.
Regular use of dressing stones will keep you blade performing at its best.

80 grit, 200mm x 50mm x 25mm Premium Series (Red colour)
These are a superior, more uniform composition stone and are very effective at sharpening  compared to the Trade series. They are also silica free ( iron trioxide - Fe2O3).
$35 each including GST

80 grit, 200mm x 50mm x 25mm Trade series (White colour)
These are sandier composition than the Premium series, but well priced.
$20 each including GST
($15 ea when in box of 24)

To use, ensure you wear eye protection. Cut across the stone in one direction only (not forward and back) to a depth of about half the thickness of the stone (Then the stone can be turned over and the other side used). A few cuts should be sufficient to dress your blade.

To see how to use a dressing stone, see this video (it shows a deglazing a tile saw blade, but the principle is the same).


Note - If you are cutting dry, always be aware of the danger of breathing in the dust. Use a half face respirator or a PAPR (Powered air purifying respirator).
View our accessories to reduce dust.

Prices correct as of 1/1/24 but subject to change.

Please see our Contact Us page for Australia wide delivery information.

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.


United Diamond Tools

U9, 84 Barberry Way
Bibra Lake
Western Australia 6163

Telephone: (08) 9434 6878