Adapter
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SDS Plus to 1 1/4" UNC adapter for Diamond core drill bits
€26.98
Hexagonal-to-M16 adapter for back box cutters and dry diamond core bits
€11.98
SDS Max to M16 adapter for back box cutters and dry diamond core bits
€26.98
Hilti BI adapter to 1 1/4" UNC for Diamond core drill bits
€49.97
Adapters for diamond core drill bits: M16, 1 1/4" UNC, SDS, hex
A core bit adapter connects a core bit to a machine whose shank does not match the core bit’s thread. On one end is the machine shank – SDS Plus, SDS Max, hex, M18, 1 1/4" UNC or Hilti; on the other is the bit thread, M16 or 1 1/4" UNC. Our adapters are made from powder-coated steel, many featuring a Pilot drill and drive wedge to ensure the bit seats correctly when operated by hand.
Core bit on a drill: which adapter fits
Diamond core drill bits with an M16 thread can also be used on a hammer drill or a standard drill, without hammer action, up to approximately 82 mm in masonry. The adapter depends on the drill chuck:
| Machine | Mount | Adapter to M16 | Adapter to 1 1/4" UNC |
|---|---|---|---|
| Small hammer drill | SDS Plus | SDS Plus to M16, also with 120 or 230 mm Pilot drill | SDS Plus to 1 1/4" UNC |
| Large hammer drill | SDS Max | SDS Max to M16, also with Pilot drill | SDS Max to 1 1/4" UNC |
| Drill, cordless screwdriver | Hex in drill chuck | Hex on M16, also with Pilot drill; Hex on M14 | |
| Core drill 1 1/4" UNC | 1 1/4" UNC | 1 1/4" UNC to M16 | |
| Core drilling unit M18 | M18 | M18 to M16 | M18 to 1 1/4" UNC |
| Core drill 1 1/4" UNC, M18 core bit | 1 1/4" UNC | 1 1/4" UNC to M18 | |
| Hilti core drilling machine | Hilti BL or BI | Hilti BL to 1 1/4" UNC, Hilti BI to 1 1/4" UNC |
For M16 core bits on M16 spindles, the M16 adapter (internal and external ) is available in 50 and 180 mm as an extension and holder for the Pilot drill, with Pilot drills measuring 8 x 120 or 8 x 230 mm.
With or without a pilot drill
When positioning the core bit by hand, it tends to shift; the Pilot drill holds it in place until the ring engages, after which it is knocked out using the drive wedge. 120 mm for back box cutters and short core bits, 230 mm for long ones; the drill bit must protrude from the front of the core bit. No Pilot drill is required when using a drill stand or for wet drilling; in these cases, the adapter alone is sufficient. Individual Pilot drills and tips can be found under ‘Pilot Drills’.
Why choose adapters from Kernlochbohrer.com
Our adapters are designed for our core bits and back box cutters; every combination listed in the table has been tested with our core bits. Over 5,000 professionals trust us, and we are Trusted Shops certified. If you’re unsure of your thread type, a photo via WhatsApp will help.
Get in touch with us
Do you have any questions or would you like some professional advice? You can contact us in person, by telephone, by email or via WhatsApp.
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