Model # R86040B

Internet #203930490

Store SKU #1000015874

RIDGID X4 18-Volt Lithium-Ion Cordless 4-1/2 in. Angle Grinder


X4 18-Volt Lithium-Ion Cordless 4-1/2 in. Angle Grinder

  • Spindle lock lets you easily change grinding wheels
  • 100% compatible with all RIDGID 18-Volt slide battery packs
  • Superior grip comfort
$9900 /each

Frequently Bought Together

Product Overview

The RIDGID X4 18-Volt Cordless Angle Grinder (Console Only) is compatible with all 18-Volt slide battery packs and features a tool-less guard design to easily rotate the guard for optimal grinding. With console-only tools, you have the option to add on to existing kits to create your own. The grinder features innovative Hex Grip micro texture to ensure comfort during extended use, and a load level LED light protects the grinder by preventing overload. With the convenient cordless design, it easily reaches tight spots without hassle. Backed by RIDGID's lifetime service agreement, you can count on free batteries, free parts and free service for the entire life of your tool.

  • Includes R86040 angle grinder, side handle, spanner wrench, wheel guard, grinding wheel, flange, clamp nut and operator's manual
  • Load level LED indicator light illuminates to prevent grinder overload
  • Tool-less guard design easily rotates guard for optimal grinding position
  • Auto tool lock-off feature prevents accidental start; if battery is installed while tool is locked on, tool will not operate
  • Hexgrip micro texture provides superior grip and comfort during extended tool use
  • Batteries and charger sold separately; works with these batteries (AC840083, AC840085, AC840084 and AC46182) and chargers (AC470013 and AC840093)
  • Lifetime service agreement with registration within 90 days of purchase
  • Click Here to Register Your Product

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  • Click here for more information on Electronic Recycling Programs

Info & Guides

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Name X4 18-Volt Lithium-Ion Cordless 4-1/2 in. Angle Grinder 18-Volt Lithium-Ion Cordless Brushless Angle Grinder 15 Amp Corded 7 in. Twist Handle Angle Grinder 18 Volt Lithium-Ion Cordless Electric 4-1/2 in. Angle Grinder with L-Boxx-2 Hard Case (Tool-Only)
Ratings (62) (39) (52) (5)
Batteries Included No No No
Reconditioned No No No No
Amperage (amps) 4 0.0 15 0
Power Tool Features Adjustable Handle Position,Grinding Wheel Included,Spindle Lock Brushless,Grinding Wheel Included,Lock On Switch Adjustable Handle Position,Grinding Wheel Included,Lock On Switch,No Tool Wheel Change,Variable Speed Adjustable Handle Position,Second Handle Included
Cordless/ Corded Cordless Cordless Corded Cordless
Wheel Diameter (in.) 4.5 in 4-1/2 in 7 in 4.5 in
Voltage (volts) 18 18 18
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Warranty / Certifications

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Customer Questions & Answers

Will the cordless grinder accept the 5/8" hole cut off discs?

Asked by: Anonymous
Yes. Recessed wheels are best, but I have used flat discs as well (contrary to literature with the machine). It might take threaded arbor disks as well, but I have not tried any.
Answered by: pdqdl
Date published: 2015-12-27

your add says you can count on free batteries, free parts and free service for the entire life of your tool. however

your add says you can count on free batteries, free parts and free service for the entire life of your tool. however your website says only batteries that come in kits qualify for replacement this grinder is sold only as bare tool which is it??? the 2 kits I have bought only have 1.5 hour battery so if I buy 3 hour it would not be covered?? if I an wrong please send a letter to verify
Asked by: Nick
most of the ridgid tools are sold without batteries so they dont have to cover them. They should offer all there tools with batteries for a little extra money and they would sell better.
Answered by: miggyman
Date published: 2016-11-07

Compatible Battery

Are the batteries contained in the R9200 combo kit (two - R84087 4.0 Ah batteries) compatible with the R86040B cordless grinder? They are not listed under the features section of the grinder.
Asked by: gh8toes
This works on all the 18v Ridgid batteries. I recommend the 4.0Ah batteries, since the 2.5Ah batteries will die much quicker.
Answered by: pdqdl
Date published: 2015-12-27

trouble shooting

I have an R86040. It quit running. The right light in front of the power button will come on if the tool is turned on when I plug in a battery. That is the only response I get to anything I've tried in attempting to get this tool to work. Very disappointed so far. This grinder has maybe 20 minutes of gentle use since I've owned it. I usually use a corded grinder. This is just used for quick light jobs. And it's already junk.
Asked by: sirwingnut
make sure the switch is in the off position before installing the battery.
Answered by: johnnyt
Date published: 2017-05-11
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Customer Reviews

X4 18-Volt Lithium-Ion Cordless 4-1/2 in. Angle Grinder is rated 3.8 out of 5 by 62.
Rated 4 out of 5 by from It is handy if you have no power available, but it will use up any battery very fast. Using it a... It is handy if you have no power available, but it will use up any battery very fast. Using it as a disk sander, I get about 10-15 minutes continued use before I need to swap batteries again. If you have to then it will work, otherwise a corded grinder will always be better. For me, till they have a cordless sander that meets my needs.
Date published: 2017-01-04
Rated 5 out of 5 by from Great deal!... Great deal!
Date published: 2017-03-01
Rated 3 out of 5 by from I like the tool... hate the trigger. I have owned this tool for a little over a month. It was bought for the purpose of cutting 1/8 inch metal plates, chain link fence, grout, tile and all kind of other things. It does shut down if you use too much force but if you pace yourself it cuts fine. The thumb trigger can be difficult to use after an exhausting day. It does eat batteries so plan on getting a pack of 4.0 amp batteries. Overall I'm satisfied and it has definitely become my go to tool.
Date published: 2016-06-22
Rated 4 out of 5 by from Very nice for a small project. I would buy this again. Received this about two weeks ago. I have used it several times on different items. This grinder will replace my air cut off grinder. Can not see starting up the compressor when this is just a battery snapping in, away from working. It okay as far as power goes, not what you would get from a 120v grinder. I would not recommend it for a large project unless you have a good number of batteries (Goes through a freshly charged 3 amp 18v battery in about 8 to 10 minutes). The cost is fairly high. but it should wash out when you take the LSA into account. It is really to early to give a opinion on durability. I would buy this again.
Date published: 2013-08-21
Rated 5 out of 5 by from 18V angle grinder Run time on the 18V 3AH X-4 lithium-ion battery is quite good. The soft start is excellent. With the battery installed the balance, grip, and weight are comfortable. I only have two complaints. Ridgid neglected to include their infamous nylon tool bag..They include a bag with the corded model! I had to spend an additional $26.00 through E-replacement parts for a storage bag! Also the spanner wrench is cheaply made. The one with this grinder is stamped out of steel and not the quality like the one that comes with the corded model. This will never replace a corded grinder for serious grinding, but for the times you are not close to an outlet this grinder will not let you down. Make sure you register this tool for the LSA program! I strongly suggest you mail in the registration with a signature required and registered mail..this will give you a paper trail should warranty documentation issues occur. AZman in Arizona
Date published: 2013-06-11
Rated 1 out of 5 by from the built in protections keep this tool from doing real work This tool will suck a newly charged battery down so hard and so fast ,that it will cut out and you have to wait for it to reset itself, 5 or 6 times cutting of a piece of 1 inch by 1/4 inch flat bar,which took 7 or 8 minutes. I have 4 batteries , 2 large and 2 small and it does it with all of them. My large drill, reciprocating saw, circular saw will do the same thing if you are working them hard. The grinder is useless for what it is intended , which is cutting or grinding in areas at heights or where corded tools are unwieldy. it is definitely not going to wear out , ever, because you couldn't do enough real work with it to harm it. It is easy to warranty for life if you engineer protections into them that won't let the tool work hard.. I have a dozen rigid cordless tools and I am going to switch to Dewalt ,Milwaukee , or Makita in the near future.. If you make your living with your tools, be warned
Date published: 2015-01-31
Rated 2 out of 5 by from Grinder returned Built pretty sturdy, but poor switch. Went through more than 1 battery cutting one 3/4 rigid conduit. It shut down 3 or 4 times. If you absolutely needed cordless I guess this may work in a pinch. I have other Ridgid 18v tools that I use on almost a daily basis, but this one isn't worth a $100 to me.
Date published: 2015-01-07
Rated 5 out of 5 by from great purchase for my shop I am really pleased with battery and overall of machine.
Date published: 2016-05-31
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