Easy
15-30 minutes
This is a Genuine OEM Milwaukee Replacement Push Button Switch used for Angle Grinders. It includes the screws used to attach the Lead Wires. Switches are commonly replaced part in power tools. A switch handles all on/off and variable speed functions. They also have a role in electric breaking because they can momentarily reverse electrical polarity. Since switches use mechanical internals, they tend to wear out over time and will eventually require replacement. A screw driver is needed to take the casing off of the tool to access the switch.
Switch 23-66-2665
OEM part for: Milwaukee
Part Number: 23-66-2665
$7.59
In Stock
Ships within 1 business day 
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Compatibility
This part will fit the following 25 machines
Milwaukee
6140-33 (SER B70A) 4.5" Angle Grinder with Slide Switch View Diagrams & Manuals
6140-30 (SER B69A) 4.5" Angle Grinder with Paddle Switch w/Lock-Off View Diagrams & Manuals
6148-30 (SER B71A) 4.5" Angle Grinder View Diagrams & Manuals
6148-31 (SER B72A) 4.5" Angle Grinder With Paddle Switch View Diagrams & Manuals
6148-33 (SER B73A) 4.5" Angle Grinder With Slide Switch View Diagrams & Manuals
6116-30 (SER B62A) 4.5" Angle Grinder With Paddle Switch W/Lock-Off View Diagrams & Manuals
6116-31 (SER B63A) 4.5" Angle Grinder With Paddle Switch View Diagrams & Manuals
6116-33 (SER B64A) 5" Angle Grinder With Slide Switch View Diagrams & Manuals
6160-33 (SER B76A) 6" Angle Grinder With Slide Switch View Diagrams & Manuals
6160-30 (SER B74A) 6" Angle Grinder With Paddle Switch W/Lock-Off View Diagrams & Manuals
6160-31 (SER B75A) 6" Angle Grinder With Paddle Switch View Diagrams & Manuals
6146-30 (D02A) 4.5" Compact Angle Grinder View Diagrams & Manuals
6148-30 (B71B) 4.5" Angle Grinder View Diagrams & Manuals
6148-30 (B71C) 4.5" Angle Grinder View Diagrams & Manuals
6117-30 (C91A) 5" HP Angle Grinder With Paddle Switch View Diagrams & Manuals
6117-31 (C92A) 5" HP Angle Grinder With Paddle Switch View Diagrams & Manuals
6117-33 (C94A) 5" HP Angle Grinder With Slide Switch View Diagrams & Manuals
6117-33D (C95A) 5" HP Angle Grinder With Slide Switch View Diagrams & Manuals
6146-31 (D03A) 4.5" Compact Angle Grinder With Paddle Switch View Diagrams & Manuals
6146-33 (D04A) 4.5" Compact Angle Grinder With Slide Switch View Diagrams & Manuals
6147-30 (D05A) 4.5" Compact Angle Grinder With Paddle Switch View Diagrams & Manuals
6147-31 (D06A) 4.5" Compact Angle Grinder With Paddle Switch View Diagrams & Manuals
6161-30 (D07A) 6" HP Angle Grinder With Paddle Switch View Diagrams & Manuals
6161-31 (D08A) 6" HP Angle Grinder With Paddle Switch View Diagrams & Manuals
6161-33 (D09A) 6" HP Angle Grinder With Slide Switch View Diagrams & Manuals
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This item works with the following types of products:
- Grinder Parts
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switch
same as the orginal
Guest -
February 28, 2023
Verified Purchase
Good experience
What I wanted and delivered in a timely manner! What more could you ask for. Thanks!!!
Guest -
November 22, 2021
Verified Purchase
Stuck Switch for grinder
MY problem was not one I read so .. IF your grinder is staying on and not able to shut off like mine this will fix the problem... strange they usually wont work but mine stuck on and could of bee dangerous so if its old and you have time replace it ,. you might not be as lucky as I was ...
Guest -
May 6, 2021
Verified Purchase
Saving my tool
It was great to get a new switch to give my old grinder a new life. Thank you
Guest -
October 14, 2020
Verified Purchase
Great Website!
Worked perfectly!
Guest -
December 5, 2019
Verified Purchase
Great service
Web site was easy to used to look up the exact part i needed for my grinder. Switch came a timely manner and was a perfect match.
Guest -
April 22, 2019
Verified Purchase
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t days ago
Verified Purchase
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Customer Repair Instructions ?
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
Unit would not turn off, would start as soon as plugged in.
Gerald - April 15, 2016
👍 1 of 1 people found this instruction helpful
Tool Type
Grinder
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver
Parts Used
Remove rear handle assembly make switch wiring diagram. Remove the wires from the old switch and replace them in the new switch. Attach handle assembly. Works great.
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Grinder switch stay on
Paul - December 8, 2023
Tool Type
Grinder
Difficulty
Easy
Time
15-30 minutes
Tools Used
, Torks
Parts Used
Removed 4 screws replaced switch replaced Handle ad screws
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Switch stuck in the ON position.
Jon - February 2, 2023
Tool Type
Grinder
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, T10 screwdriver
Parts Used
You will need a T10 screwdriver, or a longer T10 driver bit to remove recessed case screws.
Check YouTube for videos. EReplacementParts even has a few.
Tip: make sure all the wires are tucked in before putting the case halves back together.
Easy fix, a little over 15 minutes, faster after your first one.
Check YouTube for videos. EReplacementParts even has a few.
Tip: make sure all the wires are tucked in before putting the case halves back together.
Easy fix, a little over 15 minutes, faster after your first one.
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Switch was bad, grinder stayed on all the time.
David - October 10, 2021
Tool Type
Grinder
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers
Parts Used
Removed the screws and cover unplugged the switch, installed the new switch, put the cover on and installed screws.
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Tool would not shut off
Brian - February 6, 2021
Tool Type
Grinder
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
Replace the switch
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Milwaukee Vari-Speed 5" Grinder quit working practically right out of the box
SIDNEY - December 20, 2020
Tool Type
Grinder
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, torx wrench, wire cutters, small wire nut
This was a "backup" tool that sat new in the box on a shelf for a year or better until I needed it. So, when I finally opened it and started using it... it "quit" within a week... then Milwaukee "Would Not Honor" their 'so-called' "5yr-warranty!" So, I re-boxed the "basically new" non-working grinder and put it back on a shelf for a few more years until I decided to try and fix it myself.
I assumed it was either the switch or the PCB, so I replaced both and it now works. My suggestion is take pictures and note where the wires route. The new switch did not come with some special clips but was able to reuse clips from the old switch. The only real difficult part is the reassembly... getting the wires and PCB stuffed back in position definitely takes patience.
I say "Thanks" to the people at eReplacementParts.com for keeping my order open until the manufacturer (Milwaukee) was finally able to supply the needed parts.
I assumed it was either the switch or the PCB, so I replaced both and it now works. My suggestion is take pictures and note where the wires route. The new switch did not come with some special clips but was able to reuse clips from the old switch. The only real difficult part is the reassembly... getting the wires and PCB stuffed back in position definitely takes patience.
I say "Thanks" to the people at eReplacementParts.com for keeping my order open until the manufacturer (Milwaukee) was finally able to supply the needed parts.
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Grinder would not power up when switch level depressed.
John - March 16, 2020
Tool Type
Grinder
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers
Parts Used
Opened the Grinder housing cover.
Tested switch using Ohm meter from plug end to output terminals of the switch. Determined the switch was faulty on one pole.
Pulled old switch out of housing and removed the wire terminals.
Put the wire terminals on the new switch and reinstalled it into the grinder housing.
Re-installed the Grinder housing cover.
Power tested the grinder and it functioned.
Tested switch using Ohm meter from plug end to output terminals of the switch. Determined the switch was faulty on one pole.
Pulled old switch out of housing and removed the wire terminals.
Put the wire terminals on the new switch and reinstalled it into the grinder housing.
Re-installed the Grinder housing cover.
Power tested the grinder and it functioned.
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Steve - April 29, 2019
Tool Type
Grinder
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver
Parts Used
After receiving the new switch sensor from ereplscement parts in 4 days I Removed housing and removed old sensor reassembled and now it works like it should
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Power switch to grinder quit working.
Bryan - August 24, 2018
Tool Type
Grinder
Difficulty
Easy
Time
15-30 minutes
Tools Used
, Torx bit
Parts Used
Use a multimeter to check the old switch. If it's bad replace. 4 torx bit screws on the handle, 2 screws for the power cord, and 2 wire connectors on back of the switch. The repair is straight forward.
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Switch stop working
JEFFERY - August 18, 2017
Tool Type
Grinder
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver
Parts Used
Removed the screws from the rear handle, and separated them making a not where all of the internal parts were located. Made a wiring diagram and disconnected the wires from the switch. Connected the wires to the new switch, then installed the internal parts in place in the new handle set. Screwed the handle together, and tested the grinder. Worked like a charm
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Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
All our installation videos are created and produced in collaboration with our in-house repair technician, Mark Sodja, who has helped millions of eReplacementParts customers over the last 13 years repair their products. Mark has years of experience in selling and repairing both commercial and residential products with a specialty in gas-powered equipment.
This data is collected from customers who submitted a repair instruction after replacing this exact part. Customers can rate how easy the repair was to complete and how long it took. We aggregate this data to provide a repair rating that allows customers to quickly determine the difficulty and time needed to perform their own repair.
