Easy
Less than 15 minutes
This plastic on-off switch is sourced directly from the original equipment manufacturer. It is used in Milwaukee random orbit/sheet palm sanders. This plastic part has metal terminals and is protected by the rubbery switch boot. Please note that the switch boot is sold separately.
A torx screwdriver is needed for this repair.
• Make sure the tool is unplugged
• Remove the cover/housing
• Remove old switch and disconnect wires
• Secure new switch
• Attach wires
• Replace cover and test the tool
Switch 23-66-1661
OEM part for: Milwaukee
Part Number: 23-66-1661
$4.99
In Stock
Ships within 1 business day 
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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 3 machines
Milwaukee
6020-21 (SER B18A) 1/4" Sheet Palm Sander View Diagrams & Manuals
6021-21 (SER B19A) 5" Random Orbit Palm Sander View Diagrams & Manuals
6020-21 (SER B18B) 1/4 Sheet Palm Sander View Diagrams & Manuals
This item works with the following types of products:
- Sander Parts
Customer Part Reviews ?
Average Rating (out of 5):
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Watch for sander.
I ordered a switch for my palm sander. Easy ordering, shipped, and easy to install. My sander is back to working just fine. Thank you for your service.
Guest -
March 2, 2022
Verified Purchase
Quick and perfect
My Milwaukee random orbital sander on/off quit working. I ordered this switch and within a few days I was sanding again. Very satisfied
Guest -
December 16, 2020
Verified Purchase
Great fix
Site easy to use, parts came quickly and price was right.
Guest -
October 14, 2020
Verified Purchase
The switch works good.
It works, it fit correctly, and no adjustment or tweak necessary.
Guest -
October 2, 2020
Verified Purchase
Quick responce
Got held up when sanding the inside logs of our home. Dropped my sanded and the switch broke. Just a small part but ereplacementparts had it and shipped it quickly Thanks DZ!
Guest -
March 2, 2020
Verified Purchase
Easy fix
3 screws and done. Works like new
Steve -
September 12, 2019
Verified Purchase
Fast and easy
Worked like a charm
Thanks
Guest -
July 4, 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.
Sander would just stop working as soon as it touches whatever is being sanded.
Timothy - February 6, 2024
Tool Type
Sander
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Pliers, I used a ratcheting screwdriver with a T15 and T20 tips
I removed the 3 screws in the top of the sander
I brushed all the dust out with an old paint brush
I removed the brush clamp and pulled the wire from the brush and installed the new brush.
Screw the brush clamp back on and attach the wire
Repeat on opposite side
Then I remove the switch I needed a pair of slip joint pliers to remove the wires from the back
Install new switch and attach new switch boot
Put the top of sander back on and screw the screws back in and plug it in and test it out
I brushed all the dust out with an old paint brush
I removed the brush clamp and pulled the wire from the brush and installed the new brush.
Screw the brush clamp back on and attach the wire
Repeat on opposite side
Then I remove the switch I needed a pair of slip joint pliers to remove the wires from the back
Install new switch and attach new switch boot
Put the top of sander back on and screw the screws back in and plug it in and test it out
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Wouldn't power on.
Warren - December 10, 2023
Tool Type
Sander
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Torx T20
Parts Used
Opened the sander up and blew the dust out, then tested the switch with a multimeter and the switch wouldn't close. I had another identical sander - same problem. When the switches (I bought 2) showed up, it literally took me less than 5 minutes per sander to swap the switch.
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Intermittent switch
TOM - August 11, 2023
Tool Type
Sander
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
Removed defective switch and installed the replacement. Repair coat about $4. Thx
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Switch was bad
Bret - May 1, 2022
Tool Type
Sander
Difficulty
Easy
Time
15-30 minutes
Tools Used
, Torx driver
Parts Used
1-Removed 4 tore screws holding top cover in place
2-lifted switch out of housing
3-Unplugged switch
4-Plugged in new switch
5-Placed switch back in housing
6-Secured top cover with four tore screws
2-lifted switch out of housing
3-Unplugged switch
4-Plugged in new switch
5-Placed switch back in housing
6-Secured top cover with four tore screws
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switch burned out in sander
Elizabeth - October 15, 2020
Tool Type
Sander
Difficulty
Medium
Time
15-30 minutes
Tools Used
Screwdriver, crimpers, wire snips
Parts Used
NHad to cut ends off wires and attach different end
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Replace switch
david - September 10, 2019
Tool Type
Sander
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
Replace switch
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Switch was broken and could not turn sander on.
Bret - September 4, 2019
Tool Type
Sander
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
Removed three screws holding cover on.
Removed cover.
Removed switch.
Disconnected wires.
Put wires on new switch
Placed switch back being careful with wires
Replaced cover and screws
Works like new
Removed cover.
Removed switch.
Disconnected wires.
Put wires on new switch
Placed switch back being careful with wires
Replaced cover and screws
Works like new
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Random Orbit sander wouldn't turn on.
Ron - February 22, 2019
Tool Type
Sander
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
Removed cover, 3 or 4 screws, can't remember. The switch is right there, pulled wires from old switch, put the wires on the new switch, replaced the cover and the sander worked like new.
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It wouldn't work at all
Ken - September 20, 2018
Tool Type
Sander
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Continuity tester (volt-ohm meter)
Parts Used
1. Took top off the sander to access switch--three screws
2. Caught the little rubber "boot" that covers the switch before it got away. . .you need it.
3. Checked switch, found it non functioning, open (remove it from mount & disconnect wires, check with continuity tester). Also, to confirm the switch was the only problem, clamped the wires where the switch had been together so it should be "always on" and plugged in machine. . .runs fine, so it is definitely the switch.
4. Ordered switch
5. Put new switch and rubber boot back into sander body and reconnected wires
6. Screwed top back on the machine and plugged in. Functions fine.
2. Caught the little rubber "boot" that covers the switch before it got away. . .you need it.
3. Checked switch, found it non functioning, open (remove it from mount & disconnect wires, check with continuity tester). Also, to confirm the switch was the only problem, clamped the wires where the switch had been together so it should be "always on" and plugged in machine. . .runs fine, so it is definitely the switch.
4. Ordered switch
5. Put new switch and rubber boot back into sander body and reconnected wires
6. Screwed top back on the machine and plugged in. Functions fine.
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Defective switch and torn dust boot.
Anthony - January 30, 2018
Tool Type
Sander
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Pliers
Parts Used
1. Remove 3 torx screws holding top on.
2. Remove defective switch and dust boot.
3. Install new switch and dust boot and re-assemble.
2. Remove defective switch and dust boot.
3. Install new switch and dust boot and re-assemble.
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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.
