Core Drill Adapters & Extensions
Documented spindle adapters and extensions. Compatibility is directional, see map below.
Documented connection accessories and thread adapters. CoringSpec verifies connection directionality from manufacturer specifications.
| Accessory Description | Type | Machine Spindle (From) | Bit Connection (To) | Verification |
|---|---|---|---|---|
| BLUEROCK ADP-114F-58M (1-1/4″-7 Female to 5/8″-11 Male Thread Adapter) | Spindle Thread Adapter | 1-1/4"-7 UNC | 5/8"-11 UNC | OEM Documented |
| BLUEROCK 1-1/4″-7 Female to 5/8″-11 Male Thread Adapter with Centering Pilot | Spindle Thread Adapter | 1-1/4"-7 UNC | 5/8"-11 UNC | OEM Documented |
| BLUEROCK ADP-114M-58F (1-1/4″-7 Male to 5/8″-11 Female Thread Adapter) | Spindle Thread Adapter | 5/8"-11 UNC | 1-1/4"-7 UNC | OEM Documented |
| BLUEROCK 16″ Core Bit Extension (1-1/4″-7 UNC) | Core Bit Extension | 1-1/4"-7 UNC | 1-1/4"-7 UNC | OEM Documented |
| Milwaukee 5/8″-11 6-Slot Core Bit Adapter (48-17-6002) | Spindle Thread Adapter | 1-1/4"-7 UNC | 5/8"-11 UNC | OEM Documented |
| Milwaukee 5/8″-11 Female → 1-1/4″-7 Male Core Bit Adapter (48-17-6008) | Spindle Thread Adapter | 5/8"-11 UNC | 1-1/4"-7 UNC | OEM Documented |
| BLUEROCK 6″ Core Bit Extension (1-1/4″-7 UNC) | Core Bit Extension | 1-1/4"-7 UNC | 1-1/4"-7 UNC | OEM Documented |
| BLUEROCK 12″ Core Bit Extension (1-1/4″-7 UNC) | Core Bit Extension | 1-1/4"-7 UNC | 1-1/4"-7 UNC | OEM Documented |
| Hilti BI+ (M27x2) Chuck | Manufacturer Chuck | Hilti BI+ | Hilti BI+ | OEM Documented |
Adapters change the mechanical connection only. They do not increase core drill diameter limits or alter wet or dry drilling cooling requirements.
Connection / Adapter Map
Compatibility is directional. A → adapter → B does not prove B → adapter → A.
Drill × Bit Compatibility Thread guide
Documented interfaces
- 1-1/4"-7 UNC1-1/4"-7 UNC spindle/barrel
- 5/8"-11 UNC5/8"-11 UNC threaded arbor
- BI+Hilti BI+ quick connection
- BSHusqvarna BS quick connection
- BLBLUEROCK 1-1/4"-7 UNC barrel thread
- BTBT threaded barrel interface
Directional adapter edges
| From | Adapter PN | To | Machines | Evidence |
|---|---|---|---|---|
| 1-1/4"-7 UNC | milwaukee-mxf301-adapter-48030040 | 5/8"-11 UNC | milwaukee-mxf301-2cp, milwaukee-mxf301-2cxs | Milwaukee OEM adapter 48-03-0040 |
| 1-1/4"-7 UNC | milwaukee-48-17-6002 | 5/8"-11 UNC | milwaukee-4120-21, milwaukee-4120-22 | Milwaukee 48-17-6002 OEM page |
Methodology: Verified manufacturer connection specifications and adapter documentation. Connections are non-reversible unless independently documented.
Links: Compatibility database · Thread guide
Products for this page
Core drill
VEVOR Z1Z-9260
11.8" max · corded
Largest VEVOR budget stand tier for holes approaching 12".
Core drill
Husqvarna DM 540i
4" max · cordless
Lightweight cordless commercial handheld / light stand work.
Core drill
Hilti DD 110-W
6.375" max · corded
Handheld Hilti BI+ wet concrete / dry masonry coring in the DD 110-W diameter bands.
Paid links. Specs on this site come from manufacturer documentation, not from the retailer.