This is the MK Diamond shank adapter, part number 154070, a coring accessory that lets you drive a threaded diamond core bit from an ordinary hand drill. MK describes it as threading onto a core bit to provide easy attachment to most hand-drill chucks. It carries a 5/8 in-11 male thread on the bit end and a 1/2 in triangular shaft on the chuck end. Tile setters, plumbers and remodelers buy it when they own the core bit but not a dedicated coring rig.
Specifications
- Manufacturer: MK Diamond Products
- MK part number: 154070
- Thread: 5/8 in-11
- Shaft: 1/2 in triangular
- Function: adapts a 5/8 in-11 core bit to a hand-drill chuck
Built for
- Tile and stone drilling. Drive a threaded diamond core bit from an ordinary hand drill for holes in tile and stone.
- Plumbing and fixture holes. Cut openings for faucets, drains and fittings without a dedicated coring rig.
- Remodeling. Keep an adapter in the kit so a 5/8-11 core bit can go in a hand drill chuck.
Why a triangular shaft
A three-flat shaft gives a standard three-jaw drill chuck flat surfaces to clamp against instead of a round shank that can slip under torque. That matters on a core bit, which loads the chuck harder than a twist bit does, particularly at the moment the bit breaks through the back of the material.
Fits
This adapter fits diamond core bits with a 5/8 in-11 arbor, driven from a hand drill chuck that will accept a 1/2 in shaft. MK does not publish a compatibility list beyond that, so confirm the thread on your own core bit before ordering. Note that MK also catalogs a different shank adapter, part 260000T, for MK-290GW core bits; if you are ordering for that bit line, check which adapter your bit takes.
Note on the published description
One distributor lists part 154070 with a straight shaft rather than a triangular one. MK Diamond's own product page specifies a 1/2 in triangular shaft, and that is the specification stated here.
Warranty
MK Diamond warrants new equipment to be free from manufacturing defects in normal service for one year from the date of purchase by the original consumer purchaser. Misuse, abuse, neglect, transit damage, unauthorized alteration or repair, and normal wear are excluded. MK does not pay freight, and its liability is limited to replacement cost.
Discount Cleaning Products is an authorized MK Diamond dealer based in the United States, with live support if you need help matching an accessory to your bit or drill.
Frequently asked questions
What does the MK Diamond shank adapter do?
It threads onto a 5/8-11 diamond core bit and gives it a 1/2-inch triangular shaft that fits most hand-drill chucks.
What thread does part 154070 have?
It has a 5/8-inch-11 male thread on the bit end.
Why is the shaft triangular?
A three-flat shaft gives a standard three-jaw chuck flat surfaces to clamp, which helps keep the shaft from slipping under torque.
Will it fit any core bit?
It fits core bits with a 5/8-inch-11 arbor. Confirm the thread on your own bit before ordering.
Discount Cleaning Products is an authorized MK Diamond dealer, and our US-based team can help you match the right blade, arbor, accessory and saw before you order.
