Depends on what you’re doing and what your air setup looks like. For heavy use, it won’t beat an air grinder with a proper air supply. But if you’re running an air grinder off a regular small compressor and not using it for hours at a time, the battery grinder will probably serve you a lot better. Answer from themehkanik on reddit.com
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Harbor Freight
harborfreight.com › home › power tools › grinders
Die Grinders - Harbor Freight Tools
Find Your Local Harbor Freight Store · 3 Items · All Grinders · 3 Items · Best Match · Top Rated · Price Low · Price High · Cordless Die Grinders(2) Corded Die Grinders(1) Hercules(3) Please choose a rating · $50 - $100(3) 12V(1) 20V(1) No(2) $59.99 ·
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Reddit
reddit.com › r/harborfreight › help me choose a die grinder please...
r/harborfreight on Reddit: Help me choose a die grinder please...
February 11, 2025 -

I'm trying to choose between three different setups right now for die grinders.

I have my eyes set on the following right now:

  1. Hercules Corded Electric for $56 (during the upcoming Parking Lot Sale in March)

Pros are that it's Electric so I can take it really anywhere I have access to an outlet. 25000 RPM and 4 Amp Motor. Directs air over work blowing debris away. I have a Hercules Corded Polisher and I like it.

Cons are that's it's big and bulky. Might be tough for tight areas or angles. 90 day warranty. Two wrenches for collet changes.

2. Craftsman Pneumatic for $65 (includes a grinding stone set rated for 25000 RPM and total cost is with $15 off $75 coupon).

Pros are that it has a 3 year warranty. Insulated body and spindle lock for single wrench collet changes. 21000 RPM and 4.5 CFM @ 90 PSI. I have the Craftsman Pneumatic Air Hammer and the grip is awesome and I really like the tool.

Cons are that it's right angle so might be awkward for some uses in tight deep spaces. Limited to use where I have compressor access.

3. McGraw Pneumatic Right Angle & McGraw Pneumatic Extended for about $45.50 (the Right Angle is on sale for $20 for ITC right now and the Extended can be had this weekend for $24.50 with 15% off or I can wait for a potentially better deal on it with some patience).

Pros are that should have no issues with access as I'd have both 90 degrees and straight with extended 3.5" reach. Rated to 20000 RPM and 2.9 CFM @ 90 PSI and 25000 RPM and 3.0 CFM @ 90 PSI. Insulated body. Includes 1/8" collets.

Cons are that limited to use where I have compressor access. Two wrench collet changes. 90 day warranty. McGraw is the Better tier of their Good, Better, Best system but I've never used any of their air tools before.

Admittedly most use of my die grinder would be in my workshop where I have my compressor. Even though most of my tools are battery, I still have a few corded or pneumatic.

I guess to be truly fair, I should add $10 to #1 and #3 for buying the grinding stones. Which would bring prices to $66 for #1, $65 for #2, and $55.50 for #3.

Open to all suggestions and recommendations.

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SlashGear
slashgear.com › 2074020 › best-new-harbor-freight-tools-products-2025-may-have-missed
The Best New Harbor Freight Finds You Might Have Missed In 2025 - SlashGear
5 days ago - With a near-perfect average user rating of 4.9 out of five stars from around 160 reviews, the Hercules 12V right-angle die grinder is one of Harbor Freight's best-reviewed new tools.
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YouTube
youtube.com › live › ymkHfYeQvRQ
Harbor Freight Die Grinders Complete Review - YouTube
This video I will be unboxing setting up and demonstrating two central pneumatic diagranders from Harbor freight. The angled diagrader and the straight diag...
Published   June 26, 2022
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RestoCar
restocar.com › blog › harbor-freight-die-grinder-62439
Harbor Freight Die Grinder Review Tear Down 62439 - RestoCar
September 24, 2019 - We tear down and review the harbor freight die grinder, 62439, to see if it's a good tool for getting started in the car hobby.
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Harbor Freight
harborfreight.com › home › power tools › grinders › die grinders › corded die grinders
4 Amp, 1/4 in. Die Grinder
4 Amp, 1/4 in. Die Grinder
The HERCULES® 1/4 in., 4 Amp Die Grinder has a high-performance motor that won't bog down, delivering speeds up to 25,000 RPM. The slim barrel design with overmold grip provides ultimate access with comfort and control. The ventilated housing directs exhaust away from the user, directing air over the head for cooler grinding. The lightweight design offers effortless maneuverability in hard-to-reach areas, making it ideal for reworking dies, polishing metals, material removal, and metal grinding applications.
(4.5)
Price   $79.99
Find elsewhere
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Harbor Freight
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Harbor Freight | Whatever You Do, Do It For Less
Harbor Freight buys their top quality tools from the same factories that supply our competitors. We cut out the middleman and pass the savings to you!
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The Garage Journal
garagejournal.com › forums › the tools › general tool discussion
Are "good" die grinders that much better than cheap ones? | The Garage Journal
October 25, 2011 - Some cheap pneumatic tools have no steel cylinder, just the aluminum housing itself. But like I said, mileage and expense is contingent on usage. A $20 die grinder is likely fine for most. ... My dad has had a harbor freight cut off tool for over ten years and has used the crap out of that thin and it just won't die.
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Harbor Freight
harborfreight.com › air-angle-die-grinder-32046.html
Pneumatic 1/4 in. Angle Die Grinder - Harbor Freight Tools
Harbor Freight buys their top quality tools from the same factories that supply our competitors. We cut out the middleman and pass the savings to you!
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Harbor Freight
harborfreight.com › home › power tools › grinders › die grinders › cordless die grinders
20V Brushless Cordless, 1/4 in. Die Grinder - Tool Only
20V Brushless Cordless, 1/4 in. Die Grinder - Tool Only
HERCULES™ Brushless Cordless 1/4 in. Die Grinder is powered by a high-efficiency brushless motor that delivers speeds up to 18,000 RPM. The die grinder maintains constant power in the toughest grinding, sanding, polishing, and deburring jobs.
(4.5)
Price   $69.99
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Harbor Freight
harborfreight.com › home › power tools
Grinders - Harbor Freight Tools
Angle grinders are perfect for cutting, grinding, and polishing, while bench grinders are great for sharpening tools and shaping metal. Harbor Freight Tools grinders come in a variety of sizes and power options, including corded and cordless models, to meet the needs of any job.
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Harbor Freight
harborfreight.com › home › air tools & compressors › air tools › air grinders › air angle grinders
1/4 in. Professional Mini Angle Air Die Grinder
1/4 in. Professional Mini Angle Air Die Grinder
The CHIEF™ Professional Mini Air Angle Die Grinder has a compact aluminum body and a 90° angled head for reaching tight areas. The adjustable speed regulator makes this die grinder ideal for deburring, grinding, sanding, and polishing a wide variety of materials. The front exhaust clears debris for a better view and operator safety.
(4.7)
Price   $44.99
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Harbor Freight
harborfreight.com › home › power tools › grinders › die grinders
Cordless Die Grinders - Harbor Freight Tools
Find Your Local Harbor Freight Store · 2 Items · All Die Grinders · 2 Items · Best Match · Top Rated · Price Low · Price High · Hercules(2) Please choose a rating · $50 - $100(2) 12V(1) 20V(1) No(2) $59.99 · In-Store Only · In-Store Only Add to List ·
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Harbor Freight
harborfreight.com › home › power tools › grinders › die grinders › cordless die grinders
12V Brushless Cordless, 1/4 in. Right-Angle Die Grinder - Tool Only
12V Brushless Cordless, 1/4 in. Right-Angle Die Grinder - Tool Only
This HERCULES® 12V Brushless Cordless, 1/4 in. Right-Angle Die Grinder has a high-performance brushless motor that delivers speeds up to 25,000 RPM to grind, sand, polish, and machine the toughest materials. The lightweight construction reduces user fatigue. The compact size makes this grinder easy to use in confined spaces. Powered by the HERCULES® Lithium-Ion Battery System, this brushless grinder goes where the job takes it.
(4.9)
Price   $59.99
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Harbor Freight
harborfreight.com › home › air tools & compressors › air tools
1/4'' Rear Exhaust Air Die Grinder
1/4 in. Compact Air Die Grinder
Compact design and one-hand operation give this air die grinder maneuverability in tight spaces. The rear exhaust won't blow dangerous metal chips toward the operator. The air die grinder’s ball bearing construction stands up to rigorous use.
(4.5)
Price   $19.99