Milwaukee
Milwaukee Tool 5/8"-11 x 12" Core Bit Extension
- SKU:
- MLW48-17-6012
- Availability:
- Usually Ships Same Day
- Weight:
- 3.80 LBS
Description

DUTY®
5/8"-11 Core Bit
12" Extension
Add 12 inches of reach to compatible Milwaukee core bits with a 5/8"-11 threaded connection.
Product Overview
This extension adds 12 inches between the core bit and drill for deeper-reach coring setups.
The cylindrical barrel has end flats for tool access; prepare the threads with anti-seize.
- Added reach12 inches
- Thread fit5/8"-11 core bits
- Thread preparationAnti-seize before use
- Tool accessFlat-sided end sections
Technical Specifications
- Added reach
- 12 in
- Bit thread
- 5/8"-11
- Bit fit
- Thread-matched core bits
- Thread prep
- Anti-seize lubricant
- Tool flats
- Flat-sided end sections
- Body profile
- Cylindrical barrel
Choose the Correct Fit
Match the 5/8"-11 thread before assembling the extension. Similar-looking core accessories can use different thread diameters and pitches.
Use the 12-inch added reach only where the drill setup and core bit allow it. Check available travel and clearance before starting.
Installation & Care
Apply anti-seize lubricant to the threads before use, as Milwaukee directs. Keep mating threads clean and check for damage when changing the setup.
Follow the core drill and bit instructions for operating mode, support and cooling. The extension does not change the bit’s approved materials or capacity.
Small Details. Big Jobsite Energy.
Get set. Stay focused. Make your next move count.
THE NEXT JOB.
Ask Willy:
Tell Willy the core drill connection, bit thread and added reach you need to help select the correct extension.
Important Product Questions
How much reach does this extension add?
Milwaukee specifies 12 inches of added reach for compatible core bits.
Which thread does it use?
This version is for Milwaukee core bits with 5/8"-11 threads. Match the exact diameter and pitch before installation.
Should I lubricate the threads?
Yes. Milwaukee instructs users to apply anti-seize lubricant to the threads before use.