Frequently Asked Questions:


Yes, we are open to customers. We practice Government standard physical distancing, hand sanitising for staff and customers, and hospital standard cleaning.
If you don't want to visit us, we can send your order across Perth, around W.A., or across Australia. Delivery starts from $11.
However, the reduction in domestic flights has also led to delays in domestic deliveries — particularly in the Express Post Network.


I can't see where I can buy on your website?
Although we will sell most of our products nationally, our website is not automated for purchasing. We also like to discuss your needs to make sure you get the best possible product for your job. Give us a ring, or send an email. We will send you a written quote, including shipping if required.
If you want to go ahead, you can pay via credit card over the phone, PayPal or direct deposit. We can then send the goods with a tax invoice.

Where is your office?
We are based in Perth, so if your are local, feel free to drop in. See all our contact details, including phone numbers, email, street address, opening hours and a map here. Look for the UDT sign on the road edge. But we are also happy to send most of our items anywhere in Australia.

Will you post items to the eastern states or overseas? 
We are happy to post most products nationally. The price for shipping varies on the size and weight of the products you are ordering.
We won't ship machinery as the freight is too expensive. Let us know what you are chasing, and we can point you to a local supplier in your state.
We don't ship internationally.


What are diamond blades used for? 
Diamond blades are used for quickly cutting very hard materials including concrete, asphalt, bricks, glass, and ceramics in the construction industry. By comparison, traditional saw blades or abrasive blades can be easily damaged and wear out quickly. Although more expensive initially, a correctly selected diamond blade will cut faster, finer and last longer. This ultimately saves you money.

How do you use a diamond blade?
It would be almost impossible to outline all operating and safety procedures to suit all saws on all work sites in all conditions. However, here are a range of factors you need to consider when using diamond tools. Click here to see our tips. You can also look at the operation manuals of various machines like quick cuts, floor saws, brick saws etc on our website for extra tips here.

What are diamond blades made of? 
Diamond blades are not made fully out of diamonds. They have a steel core with an edge of powdered metal that has been mixed with diamond crystals. These aren't jewellery type diamonds, but tiny synthetic diamonds that are made with a high-temperature, high-pressure synthesis process. It is fully explained here.

How long do diamond blades last for? 
It depends on many factors such as the bond of the blade you are using, the power of your tool you are using it on, what material you are cutting, whether you are cutting wet or dry, the skill of the operator, how much force they apply (don't force it) etc . Generally, short blade life is caused by using a bond which is too soft for the material being cut. It usually occurs when cutting more abrasive materials such as asphalt, green concrete or sandstone. Wet cutting will also extend the life of a blade compared to dry cutting.

My blade is no longer cutting well - can I resharpen it?
Yes you can. Chances are it is glazed from cutting hard materials. See how to de glaze it here.

Can I cut with your blades dry?
Cutting dry on some materials creates silica dust (respirable crystalline silica), which is very dangerous. See the W.A. government's info on RCS here.

How much do diamond blades cost?
The price of a diamond blade varies depending on the size of the blade, and the quality. For frequent use and larger jobs, it is better to choose a more expensive Premium Series diamond blade as they will deliver a longer life and a lower cost per linear metre of cutting. However for occasional use and smaller tasks, it is quite often preferable to choose from the lower priced Trade Series diamond blades. We also have stocks of budget blades, which are ideal for DIY or tradies with a one off job. Feel free to give us a call, or send us an email and we can give you an exact price.

I can get the same blade at half the price elsewhere - how come?
All diamond blades kind of look the same to most people. One main difference is the amount of tiny diamonds they contain. The difference between a $100 blade and a $300 blade is usually $200 worth of extra diamonds. Better quality diamond blades have more diamonds, cut faster and last longer.

How deep will my diamond blade cut?
To see how deep a blade will cut, and what speed it should run at, see here.

Will you send your blades Australia wide?
Yes. Blades up to 300mm/12" (around 1.6kg) will fit into a large post bag.
Our 350mm/14" and 400mm/16" blades will fit into a extra large bag. They can hold 1 x 16" blade (2.6kg) plus some smaller blades, or 2 x 14" blades (2 x 2kg).
Air bag prices are here.

Can you recycle diamond blades?
Steel is easy to recycle, and it can be quite valuable, so it is best for the environment if we all recycle as much as we can. Your local recycling centre/transfer station should have a metal recycling bin onsite. Or you are welcome to drop them in to us.

Do you supply blades for cutting aluminum, steel, wood etc?
We generally only supply diamond blades and not abrasive cut off wheels or tungsten tipped blades. Your local specialist hardware store can help you with those.

Core Drills:

Will you send your core barrels Australia wide?
Core barrels (even the smaller sizes) are generally over 400mm long, so need to go in a extra large bag (up to about 100mm should fit in a 5kg bag, maybe even two depending on the diameter). So grab a couple (or some diamond blades) and reduce the price of freight per barrel. A 18mm core barrel (1/2" thread) is 0.5kg, while the 1 ¼" bits start at 0.8kg. We are happy to send you a quote. Air bag prices are here.

My core barrel is no longer coring well - can I resharpen it?
Yes you can. Chances are it is glazed from cutting hard materials. Reduce the water by half for a few minutes, or try drilling into an abrasive material like limestone, a cinder block or similar. A bit of Ajax or builders sand down the hole can also have the same effect. See how to de glaze it here.

What speed should I run this core barrel at?
The bigger the core barrel diameter, the slower it has to run. See our core speed chart here.


I have lost my machine's operating manual - can you send me one?
All the operating and spare parts manuals we have can be downloaded from here.
You can download our core drilling booklet at the bottom of this page.

Will you ship machinery to the Eastern States or overseas?
No, as freight is too expensive. Let us know what you are chasing, and we can point you to a local supplier in your state.

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United Diamond Tools

Unit 10 / 84 Barberry Way
Bibra Lake
Western Australia 6163

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