BRSCHNITT Diamond Core Drill Bit 75mm

For renovators and tradespeople making larger holes in hard surfaces, this 75mm diamond core bit is designed for granite, marble, other hard stone, reinforced concrete, brick and block. It can be used for dry or wet drilling with an angle grinder.

The 5/8-11 thread is a key fit detail: check that your grinder accepts it before choosing this bit.

If you prioritize a hole saw made for hard materials, this format is worth considering, if you prefer a general-purpose bit for smaller holes or softer materials, this is a more specialised choice.

Getting the most from it

The bit has a 75mm diameter, an 80mm working length and a 100mm total length. Its diamond segment height is 10mm, with #25/35 diamond grit. Those measurements help set expectations for the hole size and the depth the bit is intended to work through, they are not a promise that every job will suit its reach or setup.

For a practical example, it could be used to make a larger opening in a stone countertop. Start with the material and grinder connection in mind, and use water when working through thick granite. The product details say water can help prolong the bit’s life, so dry drilling may be less suitable for sustained work in that situation. It is designed for dry or wet use, but the cooling advice is worth taking seriously.

Why it’s worth it

Laser-welded segments are intended to reduce the chance of segments coming off during drilling. A vacuum-brazed protective layer on the steel core is also described as supporting cleaner cuts and protecting the core. These construction details make the bit more purpose-built than a basic hole saw for general materials, particularly when the job involves stone or reinforced concrete.

That does not remove the need to match the tool and material to the task. The stated 80mm working length may be limiting for a hole that needs to pass through thicker material, and the listed information does not establish performance in every stone or concrete mix. Given its design, it makes most sense for planned hole-making rather than occasional, broad-purpose drilling.

Key features

• 75mm diamond core bit with a 5/8-11 thread.
• For granite, marble, hard stone, reinforced concrete, brick and block.
• Dry or wet drilling, water is recommended to help extend bit life when drilling through thick granite.
• Laser-welded diamond segments and a vacuum-brazed protective layer on the steel core.
• Intended for use with an angle grinder.

It suits you if you have a matching grinder and need this hole size in one of the listed materials. It is not for you if your tool has a different connection, your job needs a smaller opening, or you need more working length than the listed 80mm.

When to choose it

Choose this BRSCHNITT bit when the job calls for a 75mm opening in hard stone, brick, block or reinforced concrete and your angle grinder has the required 5/8-11 thread. Its wet-or-dry design offers some flexibility, while the advice to add water for thick granite gives a useful boundary for how to approach demanding work.

For smaller holes, repeated work across mixed materials, or a deeper cut than its stated working length allows, a different bit matched to that task would be the more sensible buy. The decision comes down to the hole size, material, depth and tool connection—not simply the diamond construction.