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RYOBI 18V One+ Cordless Brushless 4-1/2-inch Cut-Off Tool/Angle Grinder (Tool Only)

Model # P423|Store SKU # 1001090610

RYOBI 18V One+ Cordless Brushless 4-1/2-inch Cut-Off Tool/Angle Grinder (Tool Only)

Overview

Model # P423 Store SKU # 1001090610

The Ryobi 18V brushless angle grinder provides longer runtime, more power and longer motor life. Versatile design is perfect for cutting or grinding applications. The 3-position side handle is ideal for optimum hand placement.

  1. Brushless motor provides longer runtime, more power and longer motor life
  1. Compatible with lithium+ HP batteries for even more performance
  1. Versatile design is perfect for cutting or grinding applications
  1. Lock-on switch to maximize user control and convenience
  1. Compact design for user control and maneuverability
  1. Gripzone over mould with micro-texture for optimum grip and user comfort
  1. On-board storage for spanner wrench
  1. Includes: (1) 18V One+ Cordless Brushless 4-1/2-inch Cut-Off Tool/Angle Grinder P423 (Battery and Charger sold separately)

Manual

  1. P423_278_trilingual_03.pdf
  2. P423_ OPERATOR’S MANUAL .pdf

The Home Depot will provide an accessible format of PDFs upon request. Please contact us at
1-800-628-0525.

Specifications

Cordless/Corded

Cordless

Batteries Included

No

Handheld or Stationary

Handheld

Voltage (volts)

18

Amps

0

Number of Batteries Included

0

Dimensions

Assembled Depth (in inches)
12.598
Assembled Height (in inches)
5.5118
Assembled Weight (in lbs)
14.3
Assembled Width (in inches)
5.6692
Packaged Depth (in inches)
12.59
Packaged Height (in inches)
5.51
Packaged Weight (In lbs)
5.85
Packaged Width (in inches)
5.67

Details

Amps
0
Batteries Included
No
Battery Amp Hours
1
Battery Power Type
Lithium Ion
Blade Diameter (In.)
4.5
Brushed/Brushless
Brushed
Cordless/Corded
Cordless
Country of Origin
CN-China
Disc Size (in.)
4.5
Handheld or Stationary
Handheld
Laser Guide
No
Motor
Brushless
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
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18V One+ Cordless Brushless 4-1/2-inch Cut-Off Tool/Angle Grinder (Tool Only)RYOBI 18V One+ Cordless Brushless 4-1/2-inch Cut-Off Tool/Angle Grinder (Tool Only)The Ryobi 18V brushless angle grinder provides longer runtime, more power and longer motor life. Versatile design is perfect for cutting or grinding applications. The 3-position side handle is ideal for optimum hand placement.
RYOBI
1001090610
18V One+ Cordless Brushless 4-1/2-inch Cut-Off Tool/Angle Grinder (Tool Only) is rated 0.1 out of 5 by 773.
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Rated 5 out of 5 by from This is a great upgrade in the one+ tool line. The new brushless version performs better than th... This is a great upgrade in the one+ tool line. The new brushless version performs better than the original and has already worked great in a coupe of projects. Regarding the previous review it is obvious he doesn’t have the tool or severally lacks aptitude to learn about the tool. While the arbor listed is indeed correct the tool can take standard 4 1/2 inch discs as it has a spacer and locking ring. Finding discs is no problem at all and in fact enhanced as it can take standard 7/8 hole discs or threaded arbor specific discs such as 3m dewalt etc. Great tool
Date published: 2017-10-31
Rated 5 out of 5 by from The cutoff tool works great and is very portable, which is why I got it to make cuts in the field... The cutoff tool works great and is very portable, which is why I got it to make cuts in the field where I didn't have a power source. Cut life may be a little short depending on how much battery you have available for the job. For the maiden voyage, I took three batteries (one lower capacity and two high capacity, all fully charged the night before), and had to make 5 cuts of 2"x 2" x 10awg angle iron and one cut on 2" x 1/2" plate, where I exhausted the low capacity battery and 1/2 of one of the high capacity batteries. Tool cut great, but you do have to take it a little easy or the tool shuts off.
Date published: 2019-02-12
Rated 1 out of 5 by from I have almost every Ryobi tool made but am not really happy with this grinder at all. I prefer th... I have almost every Ryobi tool made but am not really happy with this grinder at all. I prefer the $40 version that isn’t brushless just because the power trigger is where a trigger should actually be on any tool. Where your finger can actually squeeze it when needed. For some odd reason the engineers at Ryobi decided to put the on/off switch on the top of this brushless grinder. Very dumb design. I wonder if the next version of drills will have the on/off switch on top? Come on Ryobi, design smarter. Not harder. Oh and I actually think the brushless motor is not as smooth as the motor with brushes and is only $40 instead of $100.
Date published: 2018-12-23
Rated 1 out of 5 by from Though I'm a huge fan of Ryobi and have mini Ryobi tools, this new grinder was a disappointing su... Though I'm a huge fan of Ryobi and have mini Ryobi tools, this new grinder was a disappointing surprise. Though this new version of the grinder had better quality accessories and overall frame build in my opinion, I was disappointed by the performance. While cutting through 1/8 inch material, it would cut off every few seconds due to what I'm guessing is a thermocouple that was way too sensitive. The cheaper version of the Ryobi grinder seems to be much more forgiving when put under any load. I bought this unit brand new at the beginning of 2019, tried for most of a day to use it on a job, and ended up working on my old grinder to get it going again since I've used it for about 3 years with no problems. In the end I just bought another one of the $50 models.
Date published: 2019-01-09
Rated 5 out of 5 by from great and powerful Great tool super powerful. For the guy who gave this a one star for not finding cut wheels for this. Should never be allowed to touch any power tool for real. Give a product 1 star cause he or she not smart enough to know any 4 1/2 wheel or blade is 1000 percent compatable as any brand or cored grinder. Some of people reviews are Ridiculous this tool dose what its ment to do
Date published: 2017-11-07
Rated 5 out of 5 by 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 from P423 GRINDER. I picked this up after the expected disappointment from the low rpm brushed grinder... P423 GRINDER. I picked this up after the expected disappointment from the low rpm brushed grinder. The brushless P423 made up for it. While not quite as powerful as your average 7A wired grinder, it does well enough to handle the same jobs cutting steel etc. The torque is fine, the primary difference is the ~11,000 rpm where most corded come in around 13,000+ etc. Putting a 4A battery in certainly makes a huge difference with longevity, and a bit of a bump to torque as well. Cutting hard steel like bed frames, stainless steel etc it does fine without getting overly hot and the battery hold throughout every project position I was in (usually 1-2 bars remaining). I have since put a flap sander on the old P421 which makes it suitable being 6500 rpm, and am able to use both productively. If you need a cordless grinder capable of replacing a corded, this is about as close as you'll get with the 4A. You'll need multiple batteries if you use it all day of course, but for typical project usage it's fine and has replaced my corded in all but the most taxing jobs where I need that little extra power.
Date published: 2017-11-15
Rated 1 out of 5 by from I bought this to use to help clean paint and rust off parts. I put on a wire cup brush to hit so... I bought this to use to help clean paint and rust off parts. I put on a wire cup brush to hit some rust on a firewall I was cleaning to paint. I put in a small battery fully charged (1.5 amp/hr). I started cleaning and it stopped in about 20 seconds. I figured because it was a small battery. If I turned it back on it would run again but only for a short time. I then put on a fully charged 4 amp/hr battery basically did the same thing. After about 40 seconds would quit have to turn it off and then back on a real PIA. I called Ryobi and they told be to take it back. I got a new one and it did the same thing. I returned it for a refund and will buy a Dewalt.
Date published: 2018-01-14
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why can't you find cut off wheels that will fit this particular tool? I have searched in store an...

why can't you find cut off wheels that will fit this particular tool? I have searched in store and online as well. There are no cut off wheels that fit 4 1/2 x 5/8 (arbor size) . there are 7/8. How can this be a cut off tool when there are no blades that will fit?
Asked by: arf
in my opinion, it is an angle grinder and there are plenty of things that attach to the arbor this uses. the actual thin cut off wheels are not made to fit this. I use grinding discs and even cement grinders on it.
Answered by: zenmaster
Date published: 2023-05-06

Does anyone else have a problem with their run time?

I have many 4A batteries and they all drain within 5-8 minutes when using this brushless grinder. I know my batteries are still good. Runs long with my other tools. Maybe my grinder is defective.
Asked by: GuamGuy
Yes. Ryobi said to use a larger than 4ah battery, but they are not out to the public yet.
Answered by: Stepmill
Date published: 2023-05-05

Can I use this tool to put an edge on a shovel or garden hoe? In other words, can I use it to sharpen things?

Asked by: Cliff
Yes. Use caution to keep the edge from getting hot or the steel will get too soft to hold an edge.
Answered by: Welder307
Date published: 2020-08-04

Is it supposed to shut down with just light pressure I can literally grab the shaft and shut it down with my hand

Asked by: Tnt
No, Mine would tear your fingers off. Is your battery fully charged?
Answered by: cloverlake
Date published: 2023-05-06

Are the safety guards made of metal? Or plastic?

Are the safety guards made of metal? Or plastic?
Asked by: Anonymous
Hi Anonymous, The guards are made of metal. Thanks for asking. Greg
Answered by: RYOBI Tools Team
Date published: 2023-05-06

what is the rpm of this tool?

Asked by: jim
10,500 rmps
Answered by: W69jms
Date published: 2020-01-29

Can you adapt foam buffing pads to this? I want to use it to detail my truck as well. What adapter would I need?

Asked by: Jeff
no
Answered by: elmo
Date published: 2023-05-06

I use a 4 amp battery and this thing stalls out and shuts off with very little pressure. Is there a fix for this?

Asked by: Tommy
I have used my 4-1/2", one+, brushless angle grinder with a 4ah battery to cut 1/4' thick 2"x2" angle iron with no stalling or shut off. Your problem maybe: a bad battery, your pushing to hard on the tool, or possibly you have a defective grinder. Any tool can be overloaded if worked to hard. If your tool stalls while displaying full power you maybe pushing the tool with to much force on the work. Very little pressure should be put on the tool when cutting or grinding. Let the cutting or grinding wheel do the work. Excessive pressure on the tool when grinding or cutting will overload it causing shut off on internal thermal safety.
Answered by: BobS
Date published: 2023-05-05
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