Milwaukee
Milwaukee Tool 4-1/4" Diamond Wet Core Bit
- SKU:
- MLW48-17-2042
- Availability:
- Usually Ships Same Day
- Weight:
- 9.55 LBS
Description

DUTY®
Diamond
Wet Core Bit
Make a 4-1/4 in opening in cured concrete with no reinforcement or small-diameter steel mesh and rebar.
Product Overview
This 4-1/4 in diamond bit wet-cores cured concrete with light or no steel reinforcement.
Its 15 in drilling depth and 1-1/4-7 thread suit a matched setup; check material first.
- Diamond edgeCuts cured concrete.
- Wet operationWater-fed coring use.
- Light reinforcementSmall-diameter mesh/rebar.
- Threaded mountingMatched core-drill fit.
Technical Specifications
- Diameter
- 4-1/4 in
- Drilling depth
- 15 in
- Connection thread
- 1-1/4-7
- Drilling mode
- Wet
- Cutting material
- Diamond
- Application
- Cured concrete
Choose the Correct Fit
Match the 4-1/4 in opening to the sleeve or service clearance required, then check the drill’s rated core capacity.
Confirm the 1-1/4-7 thread connection and the required working depth. Check the planned hole for concealed services and reinforcement.
Installation & Care
Isolate the drill before fitting or removing the bit. Follow the drill’s setup instructions and provide the specified water supply.
Allow the bit to cool before handling it. Clean out debris and inspect the cutting rim and threads before the next use.
Small Details. Big Jobsite Energy.
Get set. Stay focused. Make your next move count.
THE NEXT JOB.
Ask Willy:
Need help planning the core setup? Send Willy the required opening and depth, concrete type, drill model and spindle connection.
Important Product Questions
Is this the right bit for heavily reinforced concrete?
Its listed application is cured concrete with no reinforcement or small-diameter mesh and rebar. Choose a bit expressly suited to heavier reinforcement when the job requires it.
Can I use this core bit dry?
No. Use it wet, with the water supply and collection setup specified for the core drill.
Does a matching thread guarantee drill compatibility?
No. Check the 1-1/4-7 connection, the drill’s capacity for a 4-1/4 in bit, the available depth and the required operating setup.