Model: #P423

18V ONE+™ brushless 4 1/2 IN. cut-off tool/grinder

Brushless motor provides more runtime, more power, and longer motor life

Versatile design is perfect for cutting or grinding applications

60% more speed compared to the P421 RYOBI angle grinder

Photo: 18V ONE+™ brushless 4 1/2 IN. cut-off tool/grinder

All RYOBI Portable Power Tools and Bench/Stationary tools purchased on or after 1.1.11 are covered by a 3-year warranty.

The RYOBI 18V ONE+ System features over 125 unique products, giving you the ultimate in versatility and selection to get the job done.

View our current catalog for new product releases and the latest RYOBI savings!

Features

Lock-on switch to maximize user control and convenience

Compact design for user control and maneuverability

Tool-free guards with onboard storage for spanner wrench

Three-Position side handle for optimum hand placement

Specifications

Dimensions

Tool Weight: 4.35 lbs
Wheel Size: 4-1/2 in

Details

Battery: 18V
Speed: 10,400 RPM
Arbor Size: 5/8 in x 11 UNC

Warranty

Certifications and Listings: 1-UL Listed

In The Box

Reviews

18V ONE+™ brushless 4 1/2 IN. cut-off tool/grinder

18V ONE+™ brushless 4 1/2 IN. cut-off tool/grinder is rated 4.9 out of 5 by 42.

Rated 5 out of 5 by BDavid73 from Powerful, doesn't bog down. I have had great luck with this and have put over 1000s of hours building with my Ryobi tools, without fail. This grinder has done a lot of hard work, I've gone through dozens of cutoff wheels and grinding wheels and it still goes strong. I own a Haunted Attraction and we build sets that cover over 13,000 square feet. This along with a dozen other Ryobi tools have not let us down with our builds. They have been dropped, stepped on, ran battery after battery through them and still keep going.

Date published: 2018-05-29

Rated 5 out of 5 by Ray S from Great tool I bought this a few months ago for cordless convenience. Power and durability in a cordless tool... perfect.

Date published: 2018-05-18

Rated 5 out of 5 by Chiro from Awesome I got this tool last week for a specific job not knowing the availability of exterior plugs for my corded grinder. This was so awesome to not be encumbered with a long cord, The grinder did all that I wanted and I only neede one battery and that was not 100% charged!

Date published: 2018-06-04

Rated 5 out of 5 by The Sarg from Fantastic Tool I recently brought the Ryobi 18 v cut off / grinder. I have always used a plug in 120v cut off grinder before my purchase. This tool is immediate and powerful. I’ve cut rock, stone, rebar, pvc, etc.. No need to get the extension cord like the plug ins. I recently went to Home Depot and purchased several 20 ft lengths of 1/2” rebar. I took them to my SUV and cut them to 6 ft lengths in minutes, and loaded them easily into my SUV. This tool goes ANYWHERE, easy to use, and powerful. Many uses!!!! Love it.

Date published: 2019-05-19

Rated 5 out of 5 by LappeGuy from powerful I've used this for all sorts of work here on the farm. It is just as powerful as my corded grinder, but I use it more because its cordless, easier.

Date published: 2018-10-01

Rated 4 out of 5 by Timker from Great tool This is my second one of these grinders and it preformed super.The first one ran great just has a switch issue,needs replaced Both of these gringers have done a lot of work for me excellent

Date published: 2018-04-24

Rated 5 out of 5 by broadway joe from ease of use The cut-off tool/grinder is awesome. I really like the handle that can be turned to accommodate whatever you are trying to do with the tool. I have 6 other Ryobi cordless tools, and being able to add additional tools without buying more batteries is tremendous. I can only say great thing about Ryobi cordless tools, they are all reliable, easy to use and perform very well. I also have a Ryobi electric pressure washer, and it also works very well and extremely easy to use. I love Ryobi tools. My next purchase will be a Ryobi Chop Saw. # : - }

Date published: 2019-05-29

Rated 5 out of 5 by Maysdave11 from Plenty of power Worked great to help grind small cuts in my stone work for a fire place. Also worked great on my atv trailer repairs

Date published: 2018-05-22

18V ONE+™ brushless 4 1/2 IN. cut-off tool/grinder Reviews - page 2

Support

Manuals

Registration & Warranty

Parts

P423_278_trilingual_08.pdf
Published: 06-25-2018
Filesize: 2.64 MB

P423_278_r_03.pdf
Published: 05-16-2019
Filesize: 1.1 MB

Click the link below to access Power Tool products replacement parts schematics and order parts online.

For those customers that prefer ordering by phone, simply contact the Ryobi master parts distributor at toll free 1-877-545-4099, and place your order over the phone.

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