Which materials is this diamond core drill bit suitable for?

This bit is designed for wet drilling in concrete, reinforced concrete, and hard stone materials.

What machine connection does this Carat core drill bit have?

It features a standard 5/4" UNC (1 1/4") female thread connection for diamond core drills.

Can this diamond core bit be used for dry drilling?

No, this bit is designed exclusively for wet drilling with water cooling.

What are the dimensions of this core drill bit?

The bit has a drilling diameter of 86 mm and a usable length of 420 mm.

CARAT EB08642020 Brilliant concrete drill 86 x 420mm 5/4" wet

Name: CARAT EB08642020 Brilliant concrete drill 86 x 420mm 5/4" wet
Brand: CARAT
SKU: 02757033
Price: 246.8 EUR
Availability: PreOrder

Supplier number: CARAT EB08642020 | EAN 8714452022917

Recommended Retail Price €308.55

246.80 tax incl.

€203.97 excl. VAT (incl. all environmental contributions)

On order: delivered from 13/10/2026

Ordered before 20:00 - delivered as of 13/10/2026
Free shipping
Delivery by DHL

✆ Talk to a specialist

Reliable Carat core bit for reinforced concrete

Practical benefits

Laser welded diamond segments: Laser welded segments prevent detachment while you drill through dense aggregate and reinforced concrete.
Fast wet core drilling: Continuous water cooling allows you to cut smoothly and quickly through challenging masonry materials.
Standard 5/4" UNC connection: You easily mount the bit onto standard core drill motors to maximize power delivery.

In a nutshell

The right choise for

With the Carat Brilliant eb diamond core bit, you drill clean and precise openings through tough materials like reinforced concrete and solid stone. Its laser-welded segments prevent tooth detachment during demanding core drilling tasks. Featuring an 86 MM diameter and a 420 MM usable length, it makes creating deep penetrations for plumbing, drainage, and ventilation pipes straightforward and reliable. The continuous water cooling suppresses dust, prevents overheating, and maintains a high drilling speed. Thanks to the standard 5/4" unc (1 1/4") connection, you easily mount the bit onto common core drill motors for optimal power transfer on every job.

Product information FAQ

€246.80

tax incl.

Key features according to our expert

Diameter: 86 mm
Length: 400 mm
Connection size (machine): 1 1/4"

Product description:

Diamond drill Laser Brilliant for use with water cooling in concrete and hard stone types.
Equipped with TT segments; for easy and quick starting.
Laser welded, thus 100% guarantee against weld breakage.

All Features

Diameter: 86 mm
Length: 400 mm
Connection size (machine): 1 1/4"

Brand CARAT
02757033
EAN 8714452022917
Supplier number CARAT EB08642020

Frequently asked questions about this product

Answered by specialists

Which materials is this diamond core drill bit suitable for?: This bit is designed for wet drilling in concrete, reinforced concrete, and hard stone materials.
What machine connection does this Carat core drill bit have?: It features a standard 5/4" UNC (1 1/4") female thread connection for diamond core drills.
Can this diamond core bit be used for dry drilling?: No, this bit is designed exclusively for wet drilling with water cooling.
What are the dimensions of this core drill bit?: The bit has a drilling diameter of 86 mm and a usable length of 420 mm.