Easy
15-30 minutes
This switch is an OEM genuine replacement part. It is used in Milwaukee electric drills/drivers. Included is one (1) each of: switch handle casing, trigger switch, reversing switch, and cord clamp. A total of seven (7) screws are also included. Power cord and cord protector are sold separately. A Torx screwdriver is needed for this repair.
On-off Reversing Switch 23-66-1421
OEM part for: Milwaukee
Part Number: 23-66-1421
$59.64
Factory Backorder
Date Available: Unknown 
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Compatibility
This On-off Reversing Switch will fit the following 23 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Milwaukee
Show More Compatible ModelsThis item works with the following types of products:
- Drill Parts
- Electric Drill Parts
This part replaces obsolete part #: 23-66-1420
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very satisfied
everything was perfect
Guest -
May 15, 2021
Verified Purchase
Easy retrofit
I was kind of shocked when i got the retrofit kit for my drill switch but after starting the installation found the instructions through and a perfect fit, took about 15 minutes and drill works great again. Thanks!
Guest -
October 23, 2019
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.
Reversing switch and trigger switch inoperative
KURT - September 5, 2016
👍 4 of 4 people found this instruction helpful
Tool Type
Electric Drill
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Pliers
Parts Used
1. Read instructions!
2. Removed plastic handle.
3. Used o-ring pick to remove wires from old switch.
4. New handle is a bit longer, so I stripped cord to fit.
5. Crimped on new connectors.
6. Installed all wires.
7. ** When I fitted up the new handle to the drill, I found that the cut out for the green ground screw was not correct so that the handle would not mate securely to the drill. I took my Dremel tool and carved out a notch where the ground screw could correctly nest.
8. Drill is back in action and ready to break your arm if you don't respect it's torque!
9. Thank you, ereplacement parts!!!
2. Removed plastic handle.
3. Used o-ring pick to remove wires from old switch.
4. New handle is a bit longer, so I stripped cord to fit.
5. Crimped on new connectors.
6. Installed all wires.
7. ** When I fitted up the new handle to the drill, I found that the cut out for the green ground screw was not correct so that the handle would not mate securely to the drill. I took my Dremel tool and carved out a notch where the ground screw could correctly nest.
8. Drill is back in action and ready to break your arm if you don't respect it's torque!
9. Thank you, ereplacement parts!!!
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The Milwaukee Super Hole Shooter drill would not reverse. Would only run on the forward direction no matter which position the reversing switch was in.
Don - November 4, 2018
👍 2 of 2 people found this instruction helpful
Tool Type
Electric Drill
Difficulty
Easy
Time
30-60 minutes
Tools Used
Screwdriver, Pliers, Torx driver set
Parts Used
I followed the step by step installation instructions to the letter. Everything was concisely covered in the instructions. In about 45 minutes the job was complete. The instructions were bulletproof.
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Reversing switch bad
Wallace - February 12, 2018
👍 2 of 2 people found this instruction helpful
Tool Type
Electric Drill
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Wire cutters/wire strippers
Parts Used
Remove old handle, remove wires from old switch, place wires according to new switch directions, replace handle on drill!
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Switch broke
Albert - September 23, 2017
👍 1 of 1 people found this instruction helpful
Tool Type
Electric Drill
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers
Parts Used
Simply followed the installation instructions that were included with the switch kit
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Trigger wasn’t engaging drill
Nigel - October 10, 2021
Tool Type
Electric Drill
Difficulty
Medium
Time
Less than 15 minutes
Tools Used
Screwdriver, Crimp tool?
Parts Used
Unit comes with instructions, just pieced the trigger back together if you take it apart you can put it together
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Trigger got stuck
Garrett - June 26, 2020
Tool Type
Electric Drill
Difficulty
Easy
Time
1-2 hours
Tools Used
Screwdriver, Pliers, Wire strippers
Remove and clean screws from handle.
Open handle and remove screws from the
clamp holding the pigtail wire.
Open replacement handle and follow instructions.
Open handle and remove screws from the
clamp holding the pigtail wire.
Open replacement handle and follow instructions.
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Wendell - October 20, 2019
Tool Type
Electric Drill
Difficulty
Medium
Time
Less than 15 minutes
Tools Used
Screwdriver, Pliers, Crimpers, wire strippers, small pick
Follow instructions included with new switch kit. New handle and switch configuration to upgrade to new style.
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Reverse switch on drill was no longer operational.
Steven - February 25, 2017
👍 1 of 2 people found this instruction helpful
Tool Type
Electric Drill
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver
Parts Used
Removed the old trigger, reverse switch, and grip assembly from the drill. Install new one, following provided instructions. Take care to match wire colors to their correct termination points. Pretty easy process. When re assembling make sure no wires get pinched or squished between the grip halves.
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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.
