Medium
30-60 minutes
This Trigger switch has internal terminals and a forward/reverse lever. This authentic Milwaukee replacement part is sold individually. (Variable Speed With Reverse)
Switches are commonly replaced parts in power tools. A switch handles all on/off and variable speed functions. They also have a role in electric breaking; they can momentarily reverse electrical polarity. Because switches use mechanical internals, they tend to degrade and wear out over time, eventually requiring replacement. Some common signs of a broken or failing switch are:
Switch 23-66-1666
OEM part for: Milwaukee
Part Number: 23-66-1666
$27.99
Usually ships in 7 - 12 business days
Leaves our warehouse within 7 - 12 business days
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Product Description ?
- Classification: Part
- Weight: 0.01 lbs.
- Shipping: Ships Worldwide
Frequently Purchased Together ?
Compatibility
This part will fit the following 31 machines
Milwaukee
5374-1 (SER 715B) Electric Drill View Diagrams & Manuals
5374-1 (SER 715C) Electric Drill View Diagrams & Manuals
5374-1 (SER 715D) Electric Drill View Diagrams & Manuals
0124-1 (SER 603B) Electric Drill / Driver View Diagrams & Manuals
0224-1 (SER 574B) Electric Drill / Driver View Diagrams & Manuals
0225-1 (SER 796B) Electric Drill / Driver View Diagrams & Manuals
0232-02 (SER 923B) Electric Drill / Driver View Diagrams & Manuals
0233-02 (SER 924B) Electric Drill / Driver View Diagrams & Manuals
0233-20 (SER 924B) Electric Drill / Driver View Diagrams & Manuals
0233-21 (SER 055A) Electric Drill / Driver View Diagrams & Manuals
0234-1 (SER 532B) Electric Drill / Driver View Diagrams & Manuals
0234-1 (SER 532C) Electric Drill / Driver View Diagrams & Manuals
0234-75 (SER 987A) Electric Drill / Driver View Diagrams & Manuals
0235-20 (SER 978A) Electric Drill / Driver View Diagrams & Manuals
0235-21 (SER 056A) Electric Drill / Driver View Diagrams & Manuals
0235-21 (SER 056B) Electric Drill / Driver View Diagrams & Manuals
5370-1 (SER 672B) Magnum Two-Speed Hammer Drill View Diagrams & Manuals
5370-1 (SER 672C) Magnum Two-Speed Hammer Drill View Diagrams & Manuals
5370-1 (SER 672D) Magnum Two_Speed Hammer Drill View Diagrams & Manuals
5370-1 (SER 672E) Magnum Two-Speed Hammer Drill View Diagrams & Manuals
5371-21 (SER 408A) Magnum Two-Speed Hammer Drill View Diagrams & Manuals
5371-21 (SER 408B) Magnum Two-Speed Hammer Drill View Diagrams & Manuals
5371-21 (SER 408C) Magnum Two-Speed Hammer Drill View Diagrams & Manuals
5376-1 (SER 819B) Magnum Keyless Chuck Hammer Drill View Diagrams & Manuals
5376-1 (SER 819C) Magnum Keyless Chuck Hammer Drill View Diagrams & Manuals
5376-1 (SER 819D) Magnum Keyless Chuck Hammer Drill View Diagrams & Manuals
5376-1 (SER 819E) Magnum Keyless Chuck Hammer Drill View Diagrams & Manuals
0244-1 (SER 664C) Electric Drill / Driver View Diagrams & Manuals
6794-1 (SER 547B) Screwgun View Diagrams & Manuals
6793-1 (SER 695B) Magnum Screw-Shooter View Diagrams & Manuals
6749-1 (SER 694B) Magnum Screw-Shooter View Diagrams & Manuals
Show More Compatible Models
This item works with the following types of products:
- Drill Parts
- Electric Drill Parts
- Hammer Drill Parts
- Screwdriver Parts
Customer Part Reviews ?
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exact replacement
the reversing switch went on my Milwaukee "Hole Shooter", stuck in reverse. I typed the model # into the ereplacement search, clicked on the part, and in a few days, I was doing the repair. Perfect match. I hope to get another 20 years out of this $300 tool!
david -
November 9, 2023
Verified Purchase
milwaulkee drill trigger
part fit with no issues,drill works like new.
Guest -
September 10, 2019
Verified Purchase
Worked as expected.
Did some research before I bought this as some others bought the wrong one. Picture looked exact. A little tricky to install but works perfect.
Guest -
August 26, 2019
Verified Purchase
Wrong part send
Even though I gave them the correct Milwaukee part number, I still received the wrong part. Return was easy and free.
Guest -
July 14, 2022
Verified Purchase
only available replacement part
The part is fine, but I was replacing a previous version, and I couldn't find the exact wiring diagram for my model drill (my beef with Milwaukee), so it was a bit of trial and error to get it wired up correctly. I used the 'light bulb wired in series' set up so I wouldn't burn out the motor or the switch as I stumbled through where to connect the wires. The switch is also a tad thicker than the original, so I had to file down a nub on each side of the handle, and the same for the back side of the trigger. But I got it to fit, and work, and had a sense of accomplishment after spending 3 hours at it.
Guest -
February 5, 2020
Verified Purchase
Wrong part
Was not the correct part
Richard -
November 24, 2019
Verified Purchase
t
t
t -
t days ago
Verified Purchase
eReplacementParts Team
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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.
reverse switch broke
John - May 25, 2019
👍 1 of 1 people found this instruction helpful
Tool Type
Electric Drill
Difficulty
Medium
Time
More than 2 hours
Tools Used
Screwdriver, solder gun
Parts Used
my drill is over 30 years old, so it doesn't have the module. They don't make the switch for this drill any longer.
I had to use the variable controller from old switch & the reverse switch from the new switch since the resistance of the new variable controller was too high. Took me a while to realize this discrepancy. Had to literally cut the old reverse switch from the old switch & file old variable controller to proper size. The new reverse switch popped off relatively easy. Then had to glue the two together (old variable with new reverse). It's still better than spending $190.
I had to use the variable controller from old switch & the reverse switch from the new switch since the resistance of the new variable controller was too high. Took me a while to realize this discrepancy. Had to literally cut the old reverse switch from the old switch & file old variable controller to proper size. The new reverse switch popped off relatively easy. Then had to glue the two together (old variable with new reverse). It's still better than spending $190.
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Foreword/reverse switch broken.
Claude - December 16, 2018
👍 1 of 1 people found this instruction helpful
Tool Type
Electric Drill
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Soldering gun
Parts Used
Disassembled drill housing and removed failed switch. Installed new switch per instructions,including upgrades.
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Forward and reverse switch broke off and drill was stuck in reverse
Ryan - January 16, 2017
👍 1 of 1 people found this instruction helpful
Tool Type
Electric Drill
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, Safety pin, star bit
Parts Used
1. Remove star head screws and handle cover
2. Take pic of wire locations and colors
3.Used a safety pin, insert into tiny round hole next to each wire. This will release the wires, pull them out one at a time.
4. Remove old switch and install new one.
5. Look at pic and press wires into correct location.
6. Install handle cover and star screws.
7. Test
2. Take pic of wire locations and colors
3.Used a safety pin, insert into tiny round hole next to each wire. This will release the wires, pull them out one at a time.
4. Remove old switch and install new one.
5. Look at pic and press wires into correct location.
6. Install handle cover and star screws.
7. Test
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The switch was not working
Jerry - May 25, 2016
👍 2 of 3 people found this instruction helpful
Tool Type
Electric Drill
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers
Parts Used
Remove the handle cover. Make sure you don't lose the small spring and the lock button. Make a wiring diagram of the switch. Disconnect the wires from the switch and remove it. As per the wiring diagram, connect the wires to the new switch. Then replace the handle cover. Now plug it in and if everything went right, it will run like a new drill.
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Switch not working
David - February 3, 2016
👍 4 of 7 people found this instruction helpful
Tool Type
Electric Drill
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers
Parts Used
Remove the handle cover, exposing the switch. Take a picture of where all the wires are located. Remove the wires from the old switch and insert them into the new switch. On the wires going into the switch you will need small to press in where the wires are to pull them out. Then it is best to put some solder on the end of the wires to make them stiff enough to press into the switch
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Switch not working
Joe - December 31, 2015
👍 3 of 5 people found this instruction helpful
Tool Type
Electric Drill
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers
Parts Used
Remove handle half. Make a wiring diagram of where the wires are located. Replace one wire at a time from the old switch and place it in the new switch. Make sure you place all the wires where they were located in the housing, be careful not to pinch any when installing the handle half back on.
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Switch went out no forward
JAMES - May 21, 2021
Tool Type
Electric Drill
Difficulty
Expert
Time
1-2 hours
Tools Used
Screwdriver, Pliers, Solder iron and electronic meter
Parts Used
Remove cover and replaced with new switch after I got a diagram of how new switch was wired I was able to complete. I have 30 years of experience in electronics which was helpful.Works great now
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Switch was bad
Robert - July 31, 2018
Tool Type
Electric Drill
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Spline toolset
1. Found an online utube switch replacement video.
2. Removed old switch and electronic assy.
3. Found the A & B points on your switch opposite the online instructions for AC input.
4. Tested drill works great.
2. Removed old switch and electronic assy.
3. Found the A & B points on your switch opposite the online instructions for AC input.
4. Tested drill works great.
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Drill stopped working. Faulty variable speed switch
Curt - March 20, 2018
Tool Type
Electric Drill
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver
Parts Used
Opened up the drill and replaced the variable speed trigger/switch assembly.
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Old had used it for 30 to 35 years drilled 1000+ holes in wood cement and steal best drill I've have I wore it out😭 it just died one day
Michael - December 17, 2017
Tool Type
Hammer Drill
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Socket set, Nutdriver, Phillips,star,bits
Parts Used
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- Baffle - 42-14-0390
- 7 -18 X 2-1/16 Pan Hd. Screw - 06-82-7398
- Fan Assembly - 22-84-0880
- Gasket - 43-44-0913
- Switch - 23-66-1666
- Chuck Key - 48-66-3280
Took tool apart to see what it needed. It was not bad to take apart, you must have patience a lot of small parts .My drill had a lot of grease ,dirt, dust inside.The only thing is to make sure you take old grease out replace with new parts all fell into place, it's like brand new now hopefully I will get another 30 years thank you E Replacement Parts this repair made my day didn't want to buy a new one love love this one
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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.
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