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RYOBI 18V ONE+ 4-1/2-Inch Cordless Angle Grinder (Tool-Only)

Model # P421|Store SKU # 1000441485

Overview

Model # P421 Store SKU # 1000441485

RYOBI introduces the 18V ONE+ Cordless 4-1/2 -Inch Angle Grinder (Tool-Only). The ONE+ 4-1/2 -Inch Angle Grinder offers cordless convenience and the power of 6500 RPM for fast and precise work. This tool offers a host of user-friendly features, such as onboard wrench storage, a comfortable overmolded grip and a 3-position side handle to help reduce fatigue. It also has an intuitive trigger switch. Backed by the RYOBI 3-Year Manufacturer's Warranty, the 18V ONE+ 4-1/2 -Inch Angle Grinder includes a side handle, a Type 27 grinding guard, a grinding wheel, a spanner wrench, and an operator's manual. Battery and charger sold separately.

  1. Delivers up to 6,500 RPM for speed and precision
  1. 3-position side handle
  1. Includes: 18-Volt ONE+ 4-1/2 inch Angle Grinder and (1) 4 1/2-inch grinding wheel (Battery and Charger sold separately)
  1. Onboard spanner wrench located in the side handle for easy access
  1. GripZone overmold for added comfort
  1. Tool-free guard makes guard positioning easy
  1. Convenient and intuitive trigger switch
  1. 18-Volt for high-power applications
  1. 6500 RPM for precision at high speeds
  1. 4-1/2 in. grinding wheel for added value and convenience
  1. Compatible with all RYOBI 18-Volt ONE+ Batteries

Specifications

Dimensions

Assembled Depth (in inches)
13.70
Assembled Height (in inches)
5.44
Assembled Weight (in lbs)
6.18
Assembled Width (in inches)
5.67
Packaged Depth (in inches)
13.7
Packaged Height (in inches)
5.44
Packaged Weight (In lbs)
5.98
Packaged Width (in inches)
5.67

Details

Amps
0
Batteries Included
No
Battery Power Type
Lithium Ion
Blade Diameter (In.)
4.5
Brushed/Brushless
Brushed
Certified
Cordless/Corded
Cordless
Country of Origin
CN-China
Disc Size (in.)
4.5
Handheld or Stationary
Handheld
Laser Guide
No
Motor
Brushed
Number of Batteries Included
0
Number of Speeds
1
Power Tool Type
Angle Grinders
Variable Speed
No
Voltage (volts)
18

Warranty / Certifications

3 years limited warranty. For more information, contact 1-800-525-2579
18V ONE+ 4-1/2-Inch Cordless Angle Grinder (Tool-Only)RYOBI 18V ONE+ 4-1/2-Inch Cordless Angle Grinder (Tool-Only)RYOBI introduces the 18V ONE+ Cordless 4-1/2 -Inch Angle Grinder (Tool-Only). The ONE+ 4-1/2 -Inch Angle Grinder offers cordless convenience and the power of 6500 RPM for fast and precise work. This tool offers a host of user-friendly features, such as onboard wrench storage, a comfortable overmolded grip and a 3-position side handle to help reduce fatigue. It also has an intuitive trigger switch. Backed by the RYOBI 3-Year Manufacturer's Warranty, the 18V ONE+ 4-1/2 -Inch Angle Grinder includes a side handle, a Type 27 grinding guard, a grinding wheel, a spanner wrench, and an operator's manual. Battery and charger sold separately.
RYOBI
1000441485
18V ONE+ 4-1/2-Inch Cordless Angle Grinder (Tool-Only) is rated 4.4 out of 5 by 117.
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Rated 5 out of 5 by from A proper grinder... Very nice piece of machinery. My only complaint are the instructions, especially the part about mounting the grinder wheel (everything else was quite logical). Because this is my first grinder tool, the instructions did not make a lot of sense to me and it took me about 20 minutes to figure it out correctly. That said, the quality of the tool is excellent.
Date published: 2020-08-23
Rated 4 out of 5 by from Handy grinder I have used this grinder to sharpen my lawnmower blade wihout removing it from the lawnmower and it did a good job. I have also installed a steel cut off blade to cut through metal closet door hardware and it worked great.
Date published: 2008-12-26
Rated 4 out of 5 by from Nice cordless grinder but ... The grinder was on sale and a good deal. It works well but has one drawback. The battery blocks you from grinding a surface flat. I wanted to level out a concrete pad so I got a masonry flat girding wheel and was not able to physically lay the grinder flat to make use of the wheel face properly. I scraped up my new battery in the process of trying. I had to go back to my old school wired grinder for this job. I'm still happy to have a cordless grinder for other jobs.
Date published: 2018-10-26
Rated 5 out of 5 by from Good tool. Very happy with my cordless grinder. I have a corded grinder as well but I find the cordless on handier for a quick job.
Date published: 2019-12-02
Rated 5 out of 5 by from Ryobi DIY’er. Took care of the projects I was working on. So much more flexibility without a cord!
Date published: 2019-11-25
Rated 1 out of 5 by from Terrible !! Absolutely terrible... I bought this for projects that cords would be cumbersome.. I am semi pro... meaning it’s not my livelihood but more than a DIY’er.. it dies within a minute or two with a fully charged battery... take a fully charged battery off the charger it only lasts a minute and that is being generous... I could have returned it but it was obviously not new and in prestige condition... so I’m stuck with a paperweight ... dewalt is a better choice...
Date published: 2018-05-02
Rated 3 out of 5 by from Great portable tool. Fortunely it was a promo price which has made it value for money. Light duty however, probably only 2 minutes max CONTINUOUS grinding on 1 fully charged battery ( all my batterers are new ) In fairness the grinder itself should get 4 stars ........The batteries are the weak link
Date published: 2017-12-02
Rated 3 out of 5 by from Not really an angle grinder but good value w/batt This is worth buying just for the free battery and charger, amazing price. But it's a sad excuse for an angle grinder. 6500 rpm? That's not even an angle grinder. But you can spend $30 and get a corded grinder that spins at 12k, and spend $80 on this, and now you have 2 different speed grinders, and a free battery, for less money than it would cost to buy a single corded variable speed grinder. So that's not bad.
Date published: 2022-09-16
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I have two questions.  Why am I not able to write a review? Every time I go to write it the site shuts down and says it's under matentence. Everything else on the site works  And secondly why would Ryobi let such a piece of garbage hit the shelves? 

Asked by: Noyb
I'm sorry I can't answer your first question but I can answer your second, I have owned almost half the Ryobi cordless tools and have never found anything wrong with them, so for you to belittle just one of their products is pretty bad. You don't even say what is wrong with it. Sometimes we get a bad one. Just return it and try another you will be surprised.
Answered by: Cyberdiver
Date published: 2019-10-15

Can this also be used as a cut off tool for cutting metal?

Asked by: Mark
Yes - works good you can change to use any thickness / type of grinding blade and even a wire brush.
Answered by: BBryan
Date published: 2020-09-22

Would this angle grinder have more power if I used bigger batteries say 4.0 Ah?

Asked by: Disgruntled
Hi Disgruntled, Thanks for reaching out to us. This 18V ONE+ 4-1/2-inch Cordless Angle Grinder works with any RYOBI 18V ONE+ Lithium-Ion battery. The higher amp hour (Ah) you use will provide longer runtimes. Other angle grinder options have increased electronics and brushless motors that will also increase the power output. To learn more about all of our angle grinding options, please contact 1-800-525-2579. Thanks, RYOBI Canada Team.
Answered by: The Ryobi Canada Team
Date published: 2022-03-03

Is this angle grinder compatible with type 29 flap disc?

Asked by: Willie
Hi Willie, Yes this 18V ONE+ 4-1/2-inch Cordless Angle Grinder is compatible with 29 flap discs as long as they remain within 4-1/2-inch diameter. We hope this helps! Thanks for reaching out to us. RYOBI Canada.
Answered by: The Ryobi Canada Team
Date published: 2020-08-13

Can I use to make angle cut on tiles?

Asked by: Pisokely
Hi Pisokely, This 4-1/2-inch Cordless Angle Grinder is typically used for grinding hard surfaces and in specific cutting applications. When performing different tasks users adapt to other blade types to ensure their saftey. When cutting tiles, this tool does ramp up in RPM's and can easily break delicate tiles if not used properly. Keep in mind you will need a specific tile blade for this to work affectivly. We hope this information helps, Thanks RYOBI Canada.
Answered by: The Ryobi Canada Team
Date published: 2021-07-10

Will the Cutting Wheel Guard still be accessible if I use an angle grinder blade that's not Ryobi? Looking to use it to cut bricks.

Asked by: Tony
Any 5/8" arbor hole blade/wheel will work on the grinder. If you are using the blade guard, you can only fit a 4 1/2" blade/wheel.
Answered by: Are Tee
Date published: 2022-08-12
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