The MK Diamond MK Premium 1-1/4-inch (32 mm) dry masonry core bit is made for drilling clean round holes in soft brick and concrete block without a water feed. It threads onto a standard 5/8 inch-11 nut and runs on most hand-held drills, so electricians, plumbers, HVAC installers and remodelers can open up conduit, pipe and vent penetrations in block walls using the drill already on the truck.
Built for
- Conduit and cable penetrations through block and brick walls
- Plumbing and drain line openings in masonry
- Dryer, exhaust and vent openings in block or soft brick
- Remodeling and retrofit work where running water is not practical
Laser-welded construction and an inventive bar-slot design are meant to promote efficiency, reliability and safety. The 10 inch barrel gives a 9-1/4 inch drilling depth, and the 7.5 mm segments are the cutting edge that does the work.
Specifications
- Diameter: 1-1/4 inches (32 mm)
- Mounting: standard 5/8 inch-11 threaded nut
- Overall bit length: 10 inches
- Drilling depth: 9-1/4 inches
- Segment height: 7.5 mm
- Construction: laser-welded with bar-slot cooling
- Cutting method: dry
- Minimum drill amperage: 6 amps
- Speed range: 2,300 to 6,000 RPM
- Manufacturer part number: 158662
Frequently asked questions
What drill does the 1-1/4-inch MK Premium dry core bit need?
MK Diamond lists a minimum of 6 amps for this size, with a speed range of 2,300 to 6,000 RPM. It threads onto a standard 5/8 inch-11 nut and attaches to most hand-held drills, so check that your drill meets the amperage and RPM range before you start.
What materials is it made for?
MK Diamond designed the MK Premium dry core bit for a variety of soft brick and concrete block drilling operations.
Does it need water?
No. This is a dry core bit, so it cuts without a water feed. The bar-slot design is built into the barrel to promote cooling, efficiency and safety.
How deep will it drill?
The bit is 10 inches long overall with a 9-1/4 inch drilling depth and 7.5 mm tall diamond segments.
MK Diamond has built diamond blades, core bits and masonry saws for the construction trades for decades. Discount Cleaning Products is an authorized dealer with US-based customer service to help you match the right size and drill.
