The MK Diamond MK Standard 1-3/4-inch dry masonry core bit (part 156316) is built for opening round holes in soft brick and concrete block without a water supply. That makes it practical on service calls and inside finished buildings, where setting up a wet coring rig for a conduit, pipe or cable penetration is more trouble than the hole is worth.
MK Diamond describes its dry core bits as laser welded with bar-slot cooling to promote efficiency, reliability and safety. At 1-3/4 inches (44 mm) across, this size suits smaller penetrations for conduit, pipe and service lines.
Use cases
- Electrical and plumbing rough-in. Open clean holes for conduit, pipe and service lines.
- Service calls. Drill dry with a hand-held drill instead of staging a wet rig.
- Masonry repair. Core out sections of soft brick and concrete block for retrofit work.
- Low-clutter job sites. Skip the water feed and slurry cleanup of a wet setup.
Specifications
- Brand: MK Diamond
- Series: MK Standard dry masonry bit
- Part number: 156316
- Diameter: 1-3/4 inches (44 mm)
- Overall length: 10 inches
- Drilling depth: 9-1/4 inches
- Segment height: 7.5mm
- Connection: Standard 5/8-11 threaded nut
- Minimum drill rating: 7 amps
- Maximum / minimum RPM: 5000 / 1600
- Cutting method: Dry
Fit and compatibility
This bit is specified by diameter and thread, not drill model. Confirm that your drill takes a 5/8-11 threaded bit, is rated at 7 amps or better, and runs within the published RPM range of 5000 to 1600. MK Diamond notes that other diameters are available on request.
Getting the most from the bit
Run the bit inside the published RPM range and let the bit do the work. Pushing a dry bit harder mostly adds heat, which is hard on the segments. Back the bit out periodically to clear dust, and wear eye, hearing and respiratory protection when drilling masonry.
Frequently asked questions
What does the MK Standard 1-3/4-inch core bit drill?
MK Diamond lists the MK Standard dry core bits for soft brick and concrete block drilling.
Do I need water to use it?
No. This is a dry masonry bit, so no water feed is required.
What thread does it use?
It has a standard 5/8-11 threaded nut and attaches to most hand-held drills.
How deep can it drill?
The drilling depth is 9-1/4 inches from an overall bit length of 10 inches.
What drill rating does it need?
MK Diamond lists a minimum of 7 amps and an RPM range of 5000 to 1600 for this size.
Discount Cleaning Products is an authorized MK Diamond dealer, and our US-based team can help you match the right size, arbor and tool before you order.
