Model # R4120

Internet #100618246

Store SKU #187336

RIDGID 15-amp 12 in. Compound Miter Saw with Laser


15-amp 12 in. Compound Miter Saw with Laser

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Product Overview

The RIDGID 15 amp 12 in. Compound Miter Saw with Laser features a heavy duty motor that delivers up to 4000 RPM to help you power through hard woods and tough jobs. You can make bevel cuts from 3 to 48 degrees and miter cuts from 0 to 50 degrees for versatility for a wide variety of cuts. The Exactline laser alignment system makes it easy to align the blade with the cut line.

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  • 12 in. blade with 1 in. arbor for easy blade changes
  • Laser guide to help you accurately follow cut marks and keep the saw aligned with the cut
  • Sliding left fence to support taller materials and adjust for bevel cuts
  • Soft-touch controls for comfortable operation and grip
  • Front-mounted clamp for securely holding the material in place
  • Left side table extension for material support
  • 2-1/2 in. dust port to connect to standard dust-collection systems to help keep your work area clean
  • UL listed
  • 3-year manufacturer warranty
  • Lifetime service agreement with registration within 90 days of purchase (begins after the warranty period expires)
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  • Click here for more information on Electronic Recycling Programs

Info & Guides

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Name 15-Amp 10 in. Compound Miter Saw with Laser 15 Amp 12 in. Double-Bevel Compound Miter Saw 15 Amp 12 in. Double-Bevel Compound Miter Saw with XPS Light 15-amp 12 in. Compound Miter Saw with Laser
Brand Professional Woodworker DEWALT DEWALT RIDGID
Ratings (4) (54) (19) (86)
Blade Diameter 10 in 12 12 in
Maximum Cutting Thickness (in.) 5.0 6.5 6.5 3.5
Miter Saw Type Compound Compound Compound Compound
Bevel Type Single Dual Dual Single
Power Tool Features Electric Brake,Laser Guide Positive Stops Positive Stops
Cordless/ Corded Corded Corded Corded Corded
View Product View Product View Product View Product



Blade Diameter
12 in
Product Depth (in.)
28.1 in
Product Height (in.)
18.5 in
Product Width (in.)
22.6 in


Amperage (amps)
Arbor Size
1 In.
Bevel Type
Color Family
Cord Length (ft.)
Corded Tool Type
Miter Saw
Cordless/ Corded
Dust collection type
Keyless/keyed blade change
Maximum Cutting Thickness (in.)
Maximum Degree Miter Cuts - Left
Maximum Degree Miter Cuts - Right
Miter Saw Type
Product Weight (lb.)
Tools Product Type
Power Tool

Warranty / Certifications

Certifications and Listings
1-UL Listed
Manufacturer Warranty
3 year warranty, Lifetime Service Agreement within 90 days of registration

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Customer Questions & Answers

Does this saw bevel right & left?

RIDGID 15-Amp 12 in. Compound Miter Saw with Laser
Asked by: Anonymous
No, it is not a dual bevel saw.
Answered by: Grogan14
Date published: 2015-11-06

Does this saw have a brake?

Asked by: Anonymous
Yes but with a questionable history of going bad and being extremely difficult to get covered under warranty.
Answered by: TheWoodMechanic
Date published: 2015-09-20

how to install laser

Asked by: Anonymous
It attaches like a thick washer for the arbor nut against one side of the blade.
Answered by: TheWoodMechanic
Date published: 2015-09-20

which direction do you turn the blade holding bolt to get it off?

Asked by: Anonymous
This bolt is reverse thread, so Clockwise to loosen, and Counter clockwise to tighten. Standard is left to loosen, right to tighten,
Answered by: Brian
Date published: 2016-02-05
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Customer Reviews

15-amp 12 in. Compound Miter Saw with Laser is rated 4.1 out of 5 by 86.
Rated 1 out of 5 by from Poor quality Took saw out of the box. Followed instructions and attached blade with no problems. Had the whole saw setup and ready to go. Only problem is the lock pin wouldn't work to lock the blade down when you carried it. Another problem is the quick bevel adjust button has sticking issues which made it useless and not worth it. Overall I threw the saw back in the box and took it back to the store. CHEAP SAW NOT WORTH YOUR MONEY!!
Date published: 2017-06-24
Rated 4 out of 5 by from Blade tightening Do not use the Allen key (blade wrench) as per the manual's instruction to tighten the blade, use a proper socket wrench. Initially, I tightened as per instruction to the point of slightly stripping the blade bolt and the blade loosened after a few cuts. Otherwise, I am satisfied so far.
Date published: 2017-07-04
Rated 4 out of 5 by from Great saw for the price I recently got this miter saw. It went together very easily and required very few adjustments. It cuts beautifully. It went through 4X4 stock like a hot knife through butter. The positives by far out way the negatives and I would get this saw again in a heart beat. I only have two negatives to the saw which is why I gave it a 4 instead of a 5. Both issues are easy to live with. The dust collection only gets about 30% so you will have a serious clean up after use. The second issue I have with it is that the laser line is not where the saw blade cuts. The laser is consistently about 1/16 of an inch to the left of the actual cut. You will get use to that though. You just need to realize it will happen. Overall I am very happy with the saw and would make this purchase again without having to think twice about it. I would highly recommend this to anyone.
Date published: 2008-06-12
Rated 1 out of 5 by from not built to last.... I purchased one of these saws for light duty cutting in our shop in 12/09. I classify light duty as trim work for displays etc.... encountered the following problems. 1) the mitre stops themselves at "0" and "45" have become worn enough that they no longer hold tolerance, tightening the stop only moves the fence clockwise. 2) we have had a problem with thin kerf blades working loose after a short time cutting. Problem was resolved after we went to a 80 ATB blade of better quality. 3) the back stop area is too low for our uses, not any fault of RIGID just makes cutting shorter taller pieces hard. after almost one year of not hard use this saw just doesn't cut straight. Hopefully the warranty measures up to all the advertising that Home Depot does.
Date published: 2010-12-22
Rated 3 out of 5 by from Solid construction but misses on the details I purchased this saw in Feb of '11 for a custom Cedar fence I was building. Right off the bat, I found the overall construction to be very solid. After getting everything unpacked and following the recommended setup instruction I came to find that things needed a little adjusting yet. This didn't come as a shocker as I expect to have to fine tune a couple 100ths here or there. What I didn't expect was to find that I couldn't get both sides of the saw blade to go square to the fence! Adding on the axillary fence extension only made things worse since it's bolt holes were drilled in such a manner that its difficult to get the top flush with the main base nor was the side milled square so the aux fence is slightly out of square. I was able to over come this by setting the right side back a bit and getting the left side flush. I had to file out the main fences bolt holes to allow for a proper alignment. I had to pull the right side of the fence all the way forward and push the left side back to get things close. Once I was able to get things setup square, everything was dead on. Even the laser worked great.... as long as I was sawing in heavy shade, early morning, or at dusk. Otherwise, speed square your line and eyeball the blade to the line during the day. I was disappointed to find that my setup didn't take long to get out of adjustment though. I'm not sure if it is due to the companion Rigid mobile miter saw stand I also purchased. All I know is that I'm sawing away the next day after a full setup and found, after a number of boards were cut, that my settings were off again. All in all, I expected better from Rigid. I own a few of their tools including a 7" grinder and the variable speed hammer drill, both of which I really like. I'm hoping that I can finally get this saw dialed and get the settings to stick. Otherwise, I think I've just purchased a $300 paper weight.
Date published: 2011-03-09
Rated 2 out of 5 by from This saw has not been made since 2011 Please be aware that this saw is very old and some of the parts including the mitre locking lever have been discontinued. I have called Ridgid and other parts suppliers and everyone says this saw is very old and the part I needed is discontinued.
Date published: 2016-01-06
Rated 5 out of 5 by from Great Saw -- Great Value This is a great saw for the kind of projects that I do - which mostly DIY things around the house. I don't know how the saw would stand up in commercial use but that's not important to me. Setting up the saw was fairly easy. I did not have any trouble squaring the table or the blade. The laser is a nice feature but takes some getting use to. I haven't quite mastered it yet but I think it is just a matter of practice. Compared to other brands this saw has more features that some saws that cost considerably more. I particularly like the repeat-a-cut feature.
Date published: 2012-05-22
Rated 5 out of 5 by from one of the best tools I own I bought this saw 12 years ago. looks like they have made some changes (laser and have gone to a different way to lock the miter) otherwise it looks to be the same saw. I have used this saw a lot. From a large addition to my house, to cutting aluminum, vinyl siding and all sorts of home improvements including moldings. Buy a good blade as that is where the "rubber meets the road". The stops are still accurate, the saw cuts straight and I don't have to mess with it because it stays true. I don't baby this saw, it takes all I throw at it. I would recommend this saw to anyone.
Date published: 2012-04-28
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