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A compact 7-piece wet diamond tile drilling set covering 6mm to 18mm core drills plus a 115mm fine turbo diamond blade. Supplied in a blow-moulded carry case. Suitable for ceramic, porcelain and masonry. Handy for both trade and DIY use.
This mini diamond core drill and blade set gives you six core drill sizes and a fine turbo cutting blade in a single compact kit. Covering 6mm, 7mm, 8mm, 10mm, 12mm and 18mm, it handles the sort of hole-size variety that comes up regularly when tiling — tap holes, shower fittings, wall sockets, overflow outlets and the rest. The mini diamond core format keeps the bits manageable and the kit small enough to throw in a bag without taking up half of it.
The 115mm fine turbo diamond blade is rated for ceramic and masonry, which covers the vast majority of what you will encounter on a typical domestic or light commercial tiling job. Fine turbo segment profiles cut smoothly without the chipping you get from coarser blades, which matters when you are cutting tiles that are already on display.
What the Mini Diamond Core Set Includes
Six mini diamond core drills: 6mm, 7mm, 8mm, 10mm, 12mm and 18mm. One fine turbo diamond cutting blade, 115mm diameter with a 22.23mm bore, compatible with standard small angle grinders. Everything arrives in a blow-moulded case, which is the sort of thing that sounds like a minor detail until you have spent ten minutes fishing loose drill bits out of a toolbag. The case keeps them organised and protects the cutting edges between jobs.
Wet Drilling Only
These are wet-use core drills, which means you need water at the cutting point during use. That keeps the diamonds cool and extends the working life of each bit considerably. A simple water feed bottle or a damp sponge held at the edge works fine for wall tiles. Running them dry will burn out the bond and shorten the life of the bits faster than you might expect.
Described as suitable for both professional and DIY use, this set is a practical option for tilers who want a grab-and-go kit covering the most common hole sizes, without carrying a full set of individual drill bits across multiple jobs.
Pro Tip: When drilling porcelain with these core drills, start at a slight angle to nick a small groove before bringing the bit upright — it stops the drill walking on glazed surfaces and gives you a cleaner entry point without needing a guide.
Used primarily for drilling holes in ceramic wall tiles, porcelain tiles and general masonry. Common applications include cutting holes for tap fittings, shower valves, pipe penetrations, socket back boxes and overflow outlets. The blade handles straight cuts and trimming on ceramic and masonry products where a full-size disc would be overkill. Suited to bathroom and kitchen tiling work, splashbacks and light-duty masonry tasks on site or in a domestic setting.
Not suitable for: Not suitable for dry drilling — these core bits require water cooling during use. Not recommended for natural stone such as granite or marble, where dedicated stone-rated bits are more appropriate.
Always run water at the cutting point when using these core drills. A small water feed bottle directed at the bit, or a damp sponge held against the tile edge, is usually enough for wall tile work. Mark your hole centre clearly before starting and use a centre punch or masking tape to stop the bit walking on glazed surfaces.
For the diamond blade, fit it to a small angle grinder with the 22.23mm bore adaptor and use it for trimming or straight cuts on ceramic and masonry. Let the blade do the work at a steady pace — forcing it through harder material will wear the segments down faster and risks chipping the tile face.
Mark the hole position clearly on the tile surface
Apply masking tape over the mark to reduce surface slip on glazed tiles
Select the correct core drill size for your fitting
Set your drill to a low to medium speed with no hammer action
Position the bit at a slight angle initially to score a starting groove
Bring the drill upright and apply steady, light pressure throughout
Keep water flowing at the cutting point continuously during drilling
For the blade, fit to a compatible angle grinder using the 22.23mm bore and make cuts at a controlled, steady pace with water cooling where possible
Can these core drills be used without water?
No. These are wet-use diamond core drills and must be used with water cooling at all times. Running them dry overheats the diamond bond very quickly, which degrades the cutting ability and significantly shortens the life of the bits. Even a small trickle or a damp sponge at the entry point is enough for most wall tile applications.
Will the 115mm diamond blade fit a standard angle grinder?
Yes. The blade has a 22.23mm bore, which is the standard spindle size for most 115mm angle grinders. It is rated for ceramic and masonry cutting, making it a straightforward fit for common site grinders without needing an adaptor in most cases.
The core drills use a diamond-impregnated cutting edge bonded to a steel barrel, designed for wet use on ceramic, porcelain and masonry. The 115mm fine turbo blade features a segmented diamond rim with a fine turbo profile, which produces a cleaner cut edge than standard segmented blades and reduces the risk of surface chipping. Bore size of 22.23mm is the standard for 115mm angle grinders.
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