BRSCHNITT Diamond Core Drill Bit, 55 mm

Hard tile can be awkward to drill, especially when you need a circular opening rather than a small pilot hole. This BRSCHNITT diamond core bit is sized for a 55 mm hole and is intended for dry drilling in materials including porcelain tile, ceramic, granite and marble. The pack contains one bit, so the key decision is whether that diameter and its triangle shank suit your job. Water can help prolong the bit’s life, even though dry drilling is the stated use.

How to use it

The bit is listed for electric drills, hand drills and bench drills. For an angle grinder, the product information says to install an angle grinder drill chuck, that extra setup matters if you were expecting to fit the bit directly. A practical use would be drilling a circular opening through a bathroom tile for a fitting: match the 55 mm size to the opening you need before starting, rather than choosing a bit by material alone.

The spiral groove at the top is intended to help remove chips, while wax inside the bit is described as helping with cooling and lubrication. The diamond height is 10 mm, and the total bit length is 65 mm. There’s no drilling speed or material-thickness guidance in the supplied details, so the bit doesn’t answer every setup question. Would a different hole size solve the job more cleanly? If so, this single-size bit is not the right match.

Pros

• Diamond core design is listed for dry drilling in hard porcelain tile, ceramic, bathroom tile, granite, marble, masonry, concrete, glass and hard plastic.
• Vacuum-brazed construction is intended to hold the diamond particles to the core steel and improve resistance to heat and friction.
• The spiral groove and internal wax have practical roles in chip removal, cooling and lubrication.
• Water may extend the bit’s service life, giving you the option to use it with added cooling when appropriate.

A limitation is that the pack includes one 55 mm bit, not a range of diameters. The broad material list is useful, but without hands-on testing and more detail about drilling conditions, it should not be read as a guarantee of the same cutting experience in every material. It suits you if you have a specific 55 mm opening to make and the listed shank and drill setup match your equipment. It isn’t for you if you need another diameter or want a complete set of hole sizes.

Spec sheet

• Type: Diamond core drill bit
• Size: 2-1/8 in (55 mm)
• Diamond height: 10 mm
• Total length: 65 mm
• Shank: Triangle
• Pack: 1 piece
• Listed equipment: Electric drill, hand drill or bench drill, angle grinder requires a drill chuck

What I’d decide

Choose this bit when the 55 mm diameter is the main requirement and you’re drilling one of the listed hard materials. It offers more targeted sizing than a general-purpose drill bit, but less flexibility than buying a multi-size set. Before ordering, compare the triangle shank with your drill setup and make sure the opening size is genuinely right for the fitting or task. If you need several hole sizes, or your tool needs a different shank arrangement, a different bit or a broader set would make more sense.