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5.5-Amp Angle Grinder
  • Ryobi
  • Model AG4031G
  • Internet #205558109
  • Store SO SKU #1000050896

5.5-Amp Angle Grinder

$2997 /each
Discontinued Model:

Model # AG403

Internet #100057463

Ryobi 120-Volt 4-1/2 in. Barrel Grip Angle Grinder

Discontinued Ryobi

120-Volt 4-1/2 in. Barrel Grip Angle Grinder

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Product Overview

Ryobi introduces the Ryobi 4-1/2 in. Barrel Grip Angle Grinder. This tool uses a powerful 120-volt AC, 5.5-amp motor that can generate 11,000 RPM to handle most grinding applications. To learn more about Ryobi tools go to and check out Ryobi Nation. See below for more information on this tool.

California residents: see   Proposition 65 information

  • Lightweight design with 3-position handle for left or right-handed use with an additional possible vertical handle
  • Die-cast aluminum gear housing for durability
  • Convenient spindle locking button for quick and easy grinding wheel changes
  • Wheel guard adjusts for use in various applications
  • Wrench storage in side handle
  • a target=_blank" style="color:#f96302" href= Ryobi Nation and have an opportunity to win prizes, share your Ryobi power tool experiences and receive exclusive offers for Nation members, Just click on the link to get startedĀ /a"

Info & Guides

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Name 5.5-Amp Angle Grinder 120-Volt 4-1/2 in. Barrel Grip Angle Grinder 6.5-Amp Angle Grinder 6 Amp Corded 4-1/2 in. Small Angle Grinder
Brand Ryobi Ryobi Ryobi Bosch
Ratings (115) (54) (58) (26)
Reconditioned No No No No
Amperage (amps) 5.5 5.5 6.5 6
Power Tool Features No Additional Features Adjustable Handle Position,Grinding Wheel Included,Spindle Lock Adjustable Handle Position,Grinding Wheel Included,Lock On Switch,Spindle Lock
Cordless/ Corded Corded Corded Corded Corded
Wheel Diameter (in.) 4.5 4.5 in 4.5 4.5 in
View Product View Product View Product View Product



Product Depth (in.)
12.6 in
Product Height (in.)
4.92 in
Product Width (in.)
5.51 in
Wheel Diameter (in.)
4.5 in


Amperage (amps)
Arbor Size
5/8-11 UNC
Color Family
Cord Length (ft.)
Corded Tool Type
Angle Grinder
Cordless/ Corded
Electronic Speed Control
Grinding Wheel Included
Maximum Speed (rpm)
Product Weight (lb.)
4.1 lb
Spindle Lock
Tools Product Type
Power Tool
Variable Speed

Warranty / Certifications

Certifications and Listings
1-UL Listed
Manufacturer Warranty
3 Year Manufacturer's Warranty

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Customer Questions & Answers

Why did they discontinue the ag403 grinder. I had some issues with it but bought 2 of them. A week later I could not

get another one.
Asked by: GHUO
They are defectively made and extremely dangerous.
Answered by: CUT
Date published: 2017-01-07

Ryobi Angel Grinder

I looked online at this product and it says it is discontinued. Would there happen to be one in the store?
Asked by: Donielle
Hey Donielle. Although this model is no longer available, we released a replacement model AG4031G which is currently sold through the Home Depot website. The amperage and volt on this unit compared to our new model are the same (120 volt & 5.5 amps). Link Reference:
Answered by: Ryobi Tools Team
Date published: 2015-09-20
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Customer Reviews

120-Volt 4-1/2 in. Barrel Grip Angle Grinder is rated 4.3 out of 5 by 54.
Rated 4 out of 5 by from Great value for the money and can be carefully used for tougher jobs This tool saved us about $1,400 when we re-roofed our home. We had our house re-roofed recently and the contractor wanted $1,500 to remove and haul away the old roof. We decided that we'd do this ourselves and save some money, so out came the Ryobi angle grinder. We decided to cut the roof into 4' squares to make it easier to drop into the dumpster to haul away. The roof had been re-sealed multiple times since the house was built in the 1940's the material was 2" thick in places and comprised of hot mopped rolled felt and then a layer of bitumen with stones on top. We bought a 4 1/2" diamond blade to go in the grinder so it would handle the stone and I have to say that I was impressed by the durability of this budget grinder. I would say that if you wanted to run it professionally (ie to do the roof in one morning with a crew), this would probably overheat quite quickly however we were able to work in 4' squares which allowed the grinder to cool between cuts as we removed the old roofing material between cuts. We also had to let the blade cool as once warm, it would melt the bitumen and this would gum up the blade until the bitumen cooled down enough for us to peel it out of the blade shield. It made the majority of the cuts without any problems and in the end, as we were about 3/4 of the way through the job, the brushes in the motor expired and it stopped working so we went to Home Depot and bought another Ryobi grinder. We've since bought new brushes online and the old grinder is back in service. Even going through two diamond blades and one grinder, we were still about $1,400 ahead on the alternative so it gets a big thumbs up in my book. We had previously used the grinder to flatten out some high spots in a concrete slab before laying a carpet and also to cut wire fence clips when we removed a chainlink fence from the hard and it didn't have any issues with grinding concrete or cutting metal using the thinner cutting wheel. We did find that the wheel collar that comes with the grinder was too big for the thinner cutting wheels (the wheels are still free to rotate when fully tightened) so we added a large round washer under the collar and this fixed the problem. What I really appreciate about this model is that the blade shield can be adjusted allowing it to be used at virtually any angle. The only feature that would make it any better would be a variable speed control, but you really can't expect that for this price! If you just want a reliable, basic grinder to use once in every while around the home, this is the tool for the job.
Date published: 2013-07-16
Rated 4 out of 5 by from Lasted four years I had this grinder, It has lasted me four years and hundreds of hours of abuse. I used it to do a complete Solid Axle swap on my vehicle and used it to cut parts out of 3/16" mild steel plate. Recently it finally short circuited, smoked and blew up. I ran it over with my truck and left it outside in the rain many times and it didn't affect it at all. It was a great grinder for the money.
Date published: 2012-02-29
Rated 4 out of 5 by from good deal for price this product is a very inexspensive grinder. It has a lot of power and an easy change of grinding wheels. the only disadvantage is that the grinder can only fit 4'' grindin/cutting wheels.
Date published: 2006-11-22
Rated 4 out of 5 by from It is easy to work with and operates flawlessly. The motor is powerful and all of the features are correct. I have had it for a month or so and have used it on two projects: cutting stone and cement board for a large fireplace, and cutting steel cable for cable railings. It worked well on both. I keep it and accessories in an old tool bag I had for my old Harbor Freight grinder, which finally failed. This is an upgrade in power and a worthy successor. Looks as good as the higher priced choices.
Date published: 2014-01-14
Rated 5 out of 5 by from tool for changing wheels and blades stores in handle is great feature Preforms as expected, only thing I found is with stability handle having slight forward angle Not recommended for left handed user. Gloves may help lefties but I feel gloves reduce the grip of and control over power tools.
Date published: 2013-07-09
Rated 5 out of 5 by from Great Angle Grinder! I use this Angle Grinder almost daily. Works great for sharping mower blades or cutting small concrete blocks, Used to smooth welds, along with cutting old rusty bolts. Works great I've had no trouble with it!
Date published: 2016-09-02
Rated 5 out of 5 by from Hard worker for the price I do a lot of welding and I always set up two angle grinders. One for grinding and one for wire wheeling slag. In the past I had spent three times the a mount of money on other grinders and decided to give the lesser expensive one a shot. I've been using this grinder for two years now and it works just as well as the more expensive ones. Even if it wore out in a year it would be okay at the price, but it hasn't. I'm very satisfied with it for my application and one of these days I'll pick up one or two more. The thing is, the more expensive grinders had to be replaced every couple of years and I have yet to replace this one. I also use it for my cut off wheels and it works great for those, too!
Date published: 2013-10-26
Rated 5 out of 5 by from Inexpensive tool for light jobs I wanted a cheap grinder to do a small tuchpointing job. This was the cheapest at HD, it ground through the mortar like butter. Saved me $1500 for having someone to come in far a 15 min job. It was hard for me to tell the difference between this one and the more expensive ones. Extremely delighted with the purchase
Date published: 2012-11-13
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