The MK Diamond MK-Black Turbo 5-inch (127mm) core bit is a wet-use, laser-welded diamond bit built for drilling concrete and asphalt, especially slabs and walls with moderate to heavy steel reinforcement. Contractors choose it when they need to open a clean 5-inch hole for plumbing, conduit, HVAC or anchor work without burning through bits on rebar.
Built for
- Coring through reinforced concrete slabs, footings and walls where rebar is likely to be hit.
- Utility penetrations: drain, vent, conduit and duct holes through floors and walls.
- Asphalt and paving cores for testing, drainage or utility access.
- Rig-mounted wet coring where fast, aggressive drilling and long bit life matter.
MK Diamond describes the MK-Black line as a supreme grade segmented bit engineered for exceptional footage and fast, aggressive drilling. The high diamond concentration and segment design channel slurry away from the cut, reduce vibration and hold up better in concrete with heavy steel than a basic bit. Because this is a wet bit, run a steady supply of clean water the whole time you drill; the water cools the diamonds and flushes slurry so the segments keep cutting instead of glazing.
Specifications
- Diameter: 5-inch (127mm)
- Series: MK-Black Turbo segmented core bit, supreme grade
- Use: wet drilling of concrete and asphalt
- Drilling depth: 14 inches
- Construction: laser welded segments
- Connection: 1-1/4-inch-7 nut thread (MK standard for bits from 1-5/8 inches and up)
- Additional diameters and lengths are available on request.
- Longer reach is possible with MK core bit extensions. Turbo core bits and extensions must be ordered together.
- MK Diamond part number 158718
Frequently asked questions
Is this 5-inch MK-Black Turbo bit for wet or dry coring?
It is a wet core bit. Run a continuous flow of clean water while drilling to cool the segments and carry away slurry.
Can it drill through rebar?
Yes. The MK-Black series is designed for concrete with moderate to high steel reinforcement, and its diamond concentration and segment design help it keep cutting when rebar is hit. Let the bit do the work with steady pressure instead of forcing it.
How deep can it drill?
The bit has a 14-inch drilling depth. For deeper holes, MK core bit extensions add reach, and turbo core bits and extensions must be ordered together.
What connection does it use?
MK lists a 1-1/4-inch-7 nut thread for MK-Black bits from 1-5/8 inches up to 16 inches, which covers this size. Check that your drill rig or adapter uses the same thread before ordering.
Discount Cleaning Products is an authorized dealer for MK Diamond and supports every order with US-based customer service. If you are unsure which diameter or connection fits your rig or grinder, contact us with your equipment model before you order.
