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30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
Only 4 left in stock, order soon!
Arrives
Thursday, Nov 13
Recently Viewed
Features
- Spindle Lock
- Slide Switch
- Delivers up to 12" of weld bead removal
- 27,000RPM Motor
- 0
Description
Milwaukee 2939-20 18V Cordless 1/4" Braking Die Grinder Slide Switch (Tool Only), Chrome
Brand: Milwaukee
Material: Metal
Style: Hammerdrill
Power Source: Battery Powered
Color: Gray
Brand: Milwaukee
Material: Metal
Style: Hammerdrill
Power Source: Battery Powered
Color: Gray
Voltage: 18 Volts
Maximum Rotational Speed: 2E+4 RPM
Manufacturer: Milwaukee Electric
UPC: 045242755936
Part Number: 2939-20
Item Weight: 3.58 pounds
Product Dimensions: 3.74 x 2.76 x 16.34 inches
Item model number: 2939-20
Is Discontinued By Manufacturer: No
Size: L
Item Package Quantity: 1
Number Of Pieces: 1
Special Features: Spindle Lock
Included Components: Milwaukee Electric - M18 FUEL. BRAKING DIE GRINDER
Batteries Included?: No
Batteries Required?: No
Warranty Description: Manufacturer Warranty
Date First Available: April 6, 2023
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Nov 13
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
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Top Amazon Reviews
The Milwaukee 2939-20 18V Cordless 1/4" Braking Die Grinder is a fantastic tool that delivers on power and precision. As a professional, I rely on high-performance tools, and this die grinder does not disappoint. The braking feature is excellent for added control and safety during use, especially when working with intricate parts. The 18V battery provides solid power, and I love the fact that it’s cordless, which makes maneuvering much easier. It’s lightweight but still packs a punch, making it ideal for long working sessions. The slide switch is simple and easy to operate, and the chrome finish gives it a sleek, professional look. Overall, it’s a highly durable and reliable grinder that I would recommend to anyone in need of a quality tool for detailed grinding and polishing tasks.
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Reviewed in the United States on April 17, 2025 by Khalid Mohamed Khalifa Hasaneen
As a pipelayer this tool is invaluable. Specifically used when cutting down roof drains or cutting existing pvc pipe that were stubbed too far into manholes. When you don't want to shovel 2' around a pipe to fit a Sawzall just hold this sucker down inside your pipe and cut it out clean and easy. I've never had an issue like some but we don't have weak wrists and forearms here. Never used it to cut D.I.P. or cast. Only PVC schd 40, sdr 35 and 26. Time saver. Highly suggest metal blades don't get the abrasive cutting wheels. Get diamond and metal ones they last sooooo much longer. You'll need to buy a Mandrel For Cut-Off Wheels W/3/8" Arbor Hole, 1/4" Stem to use this tool it does not come with one. And of course blades with a 3/8" hole usually 3" diameter for use. It's a must. Cheap tool saves you money on it's first few uses. Stay safe ditch diggers.
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Reviewed in the United States on August 9, 2025 by Jon
I recently purchased the M18 die grinder for just $130, a steal considering its retail price of $270 on Milwaukee's website. As someone who works on heavy equipment, I understand the importance of having a reliable die grinder on hand. This tool has truly been a lifesaver on multiple occasions since I added it to my arsenal a few weeks ago. The performance of the M18 is top-notch, and the fact that it comes at such a discounted price makes it even more impressive. Even if you don't foresee needing a die grinder often, I highly recommend grabbing this one. It's a fantastic investment that I can't praise enough.
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Reviewed in the United States on June 25, 2025 by Adam Churchill
The slide switch is awkward and hard to use, and the grinder lacks power for heavy-duty tasks. It also feels bulky and uncomfortable to handle.
Reviewed in the United States on September 16, 2024 by ricky salinas
Seems legit. Genuine millwaukee
Reviewed in the United States on October 9, 2025 by Amber Deutscher
I recently replaced the slide switch on my grinder with this one, and I’m very impressed with its performance! The switch fits perfectly, and installation was quick and straightforward, with no need for complex tools or adjustments. The build quality is solid, and it feels durable enough to withstand frequent use without any issues. What I really like about this switch is how smooth the action is. Turning the grinder on and off is effortless, and it provides a secure, consistent connection. The switch is also responsive, with a nice tactile feedback when it’s engaged, so I know the grinder is powered up and ready to go. Another standout feature is how well it holds up to the vibrations and rough handling that come with heavy-duty grinding tasks. I’ve used the grinder for several projects, and the switch hasn’t shown any signs of wear or malfunction. It’s been reliable and easy to operate, even when working for extended periods.
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Reviewed in the United States on April 23, 2025 by James
I recently added the Milwaukee 2939-20 18V Cordless 1/4" Braking Die Grinder to my tool collection, and it’s been outstanding. The power and performance are excellent for all my grinding and polishing needs. The 18V battery provides plenty of runtime, and I love the braking feature—it's a game-changer for safety and precision, ensuring that the tool stops quickly after use. The slide switch is smooth and easy to operate, and the grinder itself feels well-balanced and comfortable to use. The chrome finish looks great and adds to the overall durability of the tool. It’s perfect for tight spaces, and the cordless design makes it super convenient. Highly recommend this die grinder for both professional and DIY use—it’s built to last and performs incredibly well!
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Reviewed in the United States on April 29, 2025 by Victoria Witsaman
Got the M18 die grinder for around $130. This thing sells on Milwaukee's website for like $270! A die grinder is one of those tools that most people don't need often, but when you do need one... there is no substitute. I work on heavy equipment and I've used this bad boy several times since I got it a couple of weeks ago. It's a great die grinder. It's saved my butt a couple of times. It's a good tool at full price. At $130?!? Get it even if you don't need it. I recommend.
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Reviewed in the United States on June 21, 2025 by Tony Rader