The MK Diamond MK-190 in 1/2-inch diameter is a Premium wet diamond core bit for drilling hard tile and stone. It uses a vacuum-brazed diamond grit cutting edge fused to a heavy-duty one-piece body, so there is no bond matrix to wear away and the edge is self-sharpening. The bit has a hollow bore that acts as a core guide and a slot for ejecting the core plug. Tile setters, stone fabricators and plumbers reach for this size for anchors, fixture mounts and small supply penetrations through finished surfaces.
Specifications
- Diameter: 1/2 inch
- Type: Premium wet diamond core bit, vacuum-brazed grit edge
- Construction: heavy-duty one-piece body with hollow bore core guide and core ejector slot
- Recommended drill speed: 2,000 to 2,500 RPM
- Certification: MK Vacuum Brazed Technology, certified ANSI B71.7
MK's own literature gives two different metric equivalents for this bit across its product page, sell sheet and instruction sheet, so no millimeter figure is published here. Order by the 1/2-inch imperial size.
Water cooling is required
MK's usage instructions for the MK-190 state that the core bits must be used with water cooling at all times. Do not run this bit dry.
Fits
MK states the MK-190 is designed to operate on any corded or battery operated hand drill, and its instruction sheet recommends cordless tools because of the water cooling. MK does not publish a shank size, so confirm the shank against your chuck before ordering.
Materials
MK lists porcelain, granite, marble, tile, stone and masonry on its product page, and porcelain, granite, marble, tile, stone and glass on its sell sheet.
Discount Cleaning Products is an authorized MK Diamond dealer with US-based service and support.