Ridgid angle grinder

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Ridgid R1005 4-1/2 Inch Angle Grinder

By Ethan Bickford on Tool Reviews

Ridgid R1005 4-1/2 Inch Angle Grinder with Slim Grip

Angle grinders are one of those tools that almost every tradesman has.  Some use them more often than others. As a remodeler I find they’re a necessity for cleaning up and grinding concrete, cutting nails and screws off, and otherwise cutting and grinding metal and masonry.

Everyone needs one

The Ridgid R1005 4-1/2 Inch Angle Grinder  is a solid grinder with some nice unique features.


First impression

The first thing I noticed when I picked up the Ridgid R1005 is the small diameter of the grip area. I really like the smaller grip on this tool it’s more comfortable and feels like you’ve got a lot more control and a firm grip especially with the abundance of rubber over-mold. The guard features a really easy to use tool-less adjustment.


  • The SlimGrip design provides maximum comfort for extended use
  • Powerful 7 Amp Motor
  • Maximum control with grip closer to grinder head
  • Lock-on Button – for ease of continuous use
  • Tool-free guard changes – allows user to conveniently and quickly rotate guard to 6 locked positions
  • Three Position Auxiliary Side Handle – for added versatility
  • Spindle Lock – for easy wheel changes
  • 4 1/2” capacity
  • Balanced design – for ease of use
  • Replaceable Brushes – easy and convenient


  • Input 7 Amps
  • No Load Spee 10,000 RPM
  • Spindle Thread Size 5/8″ x 11″
  • Tool Weight 4.7 lbs


 In use

I used the Ridgid R1005 4-1/2 Inch Angle Grinder  to grind the heads off of concrete nails, to grind down some concrete, before putting up a ledger board and a few other basic metal and concrete cutting and grinding tasks. It’s got good power and speed and doesn’t bog down much at all when grinding concrete. Feels on par with other grinders I’ve used with the same motor amperage.

The R1005 is trigger actuated which is a little different from other grinders I’ve used that are either thumb or paddle switch activated. I found it to be a nice change. However I’m a lefty and I found that the thumb actuated trigger lock is decidedly not left handed friendly as it’s location on the left side of the tool makes it awkward to reach for me.

On the up side the smaller grip diameter is more comfortable in the hand than most grinders out there. The side handle is cast plastic and has three mounting options one on top of the motor housing in line with the arbor, and the usual options on either side. The guard is very easy to adjust or remove if needed. I also found is that there is part of the plastic housing just above the trigger that prevents use of some dust shrouds when surface grinding. Otherwise the ergonomics and overall ease of use are great!



The R1005 has decent power and like many Ridgid tools is a great value for the money. However I would encourage lefties and those who use angle grinders with either hand or in occasionally awkward positions to look elsewhere due to the non-ambidextrous placement of the trigger lock. Otherwise the reduced size of the handle and ease of use of the tool-less guard make this a well thought out tool that’s also a great deal. If you’re looking for a general use grinder give the Ridgid R1005 a look.


Note trigger lock just above and left of the trigger. Also the plastic tab above trigger preventing use of some dust shrouds.
Ridgid R1005 getting dusty.
Ridgid R1005 gets the job done!

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Sours: https://www.aconcordcarpenter.com/ridgid-r1005-4-12-inch-angle-grinder.html

In one of those perks-of-a-tool-review-publication scenarios, we’ve got the Ridgid Octane 18V Brushless Grinder in-house before its Q1 2019 availability. This impressive grinder launches alongside a 7-inch model, so we know Ridgid has the muscle to make this thing work.


  • Outstanding power for the 4-1/2″ class
  • Brushless motor
  • Slim handle profile
  • Excellent value
  • Visual overload indicator


  • Missing a few features that premium models include
  • No kit option available


The Ridgid Octane 4-1/2-inch grinder has the power to be the primary small angle grinder for Pros that don’t need the runtime of corded tools and a supplementary grinder for those that do.

Feature Set

The newest Ridgid cordless grinder benefits from their recent Octane technology. In a nutshell, better electronic communication between the battery and brushless motor allows Ridgid to pull more power than before while still protecting the system from pushing to the point of failure.

Here’s a look at the rest of the feature set:

  • 3-position auxiliary handle
  • Tool-free wheel guard rotation
  • Wheel changes with the included spanner wrench and spindle lock
  • Lock-off protection – the system won’t restart if it shuts down with the power switch on

At this level, there’s not much missing from the basic feature list. There are a few things missing that you’ll find on premium models, though. Hilti has Kwik-Lock tool-free flanges along with Active Torque Control (stops the motor in a bind up). There are also models with an active vibration control and others with an electric brake.

While Ridgid doesn’t claim to have a 2-second brake like some brands, the wheel doesn’t seem to spin as long as some of our other non-braking grinders. It also doesn’t have an obscene level of vibration, either.


I love that Ridgid slims down the handle on this model. For Pros that don’t have gorilla hands, it’s a much more comfortable grip than standard handles. It’s no surprise to find Ridgid’s Hex Grip overmold with its bumpy texture to help secure your grip and improve comfort as well.

Grinders in this size class are pretty manageable on the weight side of things. Without the battery, this Ridgid Octane grinder weighs 4.4 pounds, including the handle. With a 6.0 Ah Octane battery, it bumps up to 6.2 pounds.

With a6.3 Ah Core18V battery, Bosch’s connected grinder weighs 6.1 pounds while Metabo’s WPB 18 LTX 115 is right at 6 pounds with its 5.5 Ah LiHD pack. That puts Ridgid in pretty good company.


Most cordless grinders in this class will be somewhere around 8500 – 9000 RPM. The Ridgid Octane 18V Brushless Grinder moves to the top of the class with 10,000 RPM. It’s a tangible benefit to Ridgid’s Octane boost.

Ridgid Octane Grinder

In this grinder’s case, Ridgid claims a 40% power increase. Our verdict: we believe it. This tool has some legitimate guts, and it’s definitely a lot more powerful than the previous model.

If using a cordless grinder is part of your daily grind, you know that it doesn’t take a ton of pressure to bog one down. It’s still possible with this model, but it takes more effort than other 4-1/2-inch cordless models. More importantly, it takes more pressure than I normally put into a cut or grind even with a corded model.


In case of an overload, an Overload Indicator light blinks red against the power switch. Since you get visual feedback where it’s easy to see, you can ease up immediately and keep working instead of waiting for an overheated battery/tool to cool down before getting back to the grind.


The $119 (bare tool) Ridgid Octane 18V Brushless Grinder has a lot of competition and most major manufacturers make at least one. Here’s how other brushless bare tool prices look for the 18V/20V Max 4-1/2-inch class:

  • Ryobi 18V One+ P423: $99
  • Kobalt 24V KAG424B-03: $135
  • Metabo HPT (Hitachi) 18V G18DBALP4: $159
  • Makita 18V LXT XAG16Z: $169
  • DeWalt 20V Max XR DCG413BL: $169
  • Bosch 18V Connected-Ready GWS18V-45CN: $179
  • Metabo 18V WPB 18 LTX BL 115: $219
  • Milwaukee M18 Fuel Braking Grinder 2783-20: $229
  • Hilti 22V AG500-A22: $339

Ridgid clearly rules the roost in bare tool price aside from its Prosumer Ryobi cousin. There’s no kit option to give you a break on the battery/charger price, but a grinder isn’t your normal entry into a cordless platform unless it comes in a combo kit.

The Bottom Line

The Ridgid Octane 18V Brushless Grinder has the power to go toe-to-toe with anyone’s cordless 4-1/2-inch grinder at a much lower price than premium models. The trade-off is that you’ll miss out on a few features that premium models have.

Ridgid Octane 18V Brushless Grinder Specifications

  • Model number: R86042B
  • RPM: 10,000
  • Weight:
    • 4.4 pounds (Bare)
    • 6.2 pounds with auxiliary handle and 6.0 Ah Octane battery
  • Warranty: 3-Year Limited and Lifetime Service Agreement
  • Price: $119 (Bare)
  • Available: Early 2019



Sours: https://www.protoolreviews.com/tools/power/cordless/grinders-sanders-cordless/ridgid-octane-18v-brushless-grinder-review/42691/
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RIDGID introduces the 18-Volt OCTANE Cordless Brushless 4-1/2 in. Angle Grinder (Tool-Only). The Brushless 4-1/2 in. Angle Grinder delivers unmatched performance in a cordless package. This grinder delivers an industry leading 10,000 RPM. OCTANE tools utilize high performance brushless motors for increased power and runtime. State of the art OCTANE electronics are built to handle maximum power from OCTANE batteries. Backed by the Industry Leading Lifetime Service Agreement, the 18-Volt OCTANE Cordless Brushless 4-1/2 in. Angle Grinder includes a spanner wrench, a grinding wheel, an auxiliary handle, and an operator's manual. Battery and charger are sold separately.

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  • LED Overload Indicator helps extend motor life.
  • Tool Free Guard Design: - Easily change the position of the guard for increased productivity. 3-position auxiliary handle provides optimal control and versatility on the jobsite.
  • Ergonomic slim grip for maximum comfort during extended use.
  • Lock-Off Protection: - Prevents accidental start. If the battery is installed while the tool lock is on, the tool will not operate.
  • Includes: - (1) R86042 18-Volt OCTANE Brushless 4-1/2 in. Angle Grinder, (1) spanner wrench, (1) grinding wheel, (1) auxiliary handle, and operator's manual


11000 rpm Brushless Motor
Sliding Switch
18V Battery

Support Documents

Sours: https://www.ridgid.com/us/en/octane-brushless-18v-angle-grinder

HOW WE USE COOKIES: We use cookies and similar technologies to improve our website, to personalize website content to you, and to deliver advertising messages and offers on content that are relevant to you. For more specific information on how we use cookies and to change your cookie preferences, see our Cookie Notice. Understand and don’t want to see this message again? Click the X to close this notice.

HOW WE USE COOKIES: We use cookies and similar technologies to improve our website, to personalize website content to you, and to deliver advertising messages and offers on content that are relevant to you. For more specific information on how we use cookies and to change your cookie preferences, see our Cookie Notice. Understand and don’t want to see this message again? Click the X to close this notice.

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The RIDGID 7 in. Angle Grinder features a powerful 15 Amp motor with precision-cut gears and sealed bearings for durability. It has a 3-Position side handle for added versatility and convenience. It also has a spindle lock that allows for quick and easy accessory changes.

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  • Lifetime Service Agreement - This tool is backed by the industry’s only lifetime service agreement, simply register within 90 days of purchase for free parts, free service for life.
  • Powerful 15 Amp Motor - Features precision cut gears and sealed bearings for increased jobsite durability
  • Spindle Lock - Allows for quick and easy accessory changes
  • 3 Position Side Handle - For added versatility and convenience
  • Auto-Stop Brushes - Automatically shut down once the end of their usable life is reached protecting the tool from damage
  • Two Finger Trigger Switch - For comfort, ease of protection and reduced user fatigue
  • Multi-Position Twist Handle - Can be locked in one of three positions
  • Tool-Free Wheel Guard Adjustment - Makes changing guard positions fast
  • Compact Gear Case - For light weight and more compact design
  • Die Cast Construction - For increased durability
  • Hex Grip™ - Enhanced micro-texture for secure grip and maximum user comfort


Input120V AC, 15 Amps
No Load Speed8,000 r/min. (RPM)
Spind le Thread Size5/8 in-11U
Tool Weight8.0 lbs.
IncludesR1020 Angle grinder, side handle, wheel guard, grinding wheel, flange, clamp nut, spanner wrench, and operator’s manual.

Support Documents

Ordering Information

Sours: https://www.ridgid.com/us/en/twist-handle-seven-inch-angle-grinder?bvstate=pg:2/ct:r

Angle grinder ridgid

Ridgid Grinder Parts & Models

Carbon Brush With Holder

Part Number: 290069406

In Stock, 25+ available

Genuine Ridgid replacement part, this item is sold individually.
2 of these Brushes are needed for a set.
This Brush includes the Brush, Brush Holder, Brush Spring and plug in terminal.
It is always best to replace both brushes, even if only one is worn.

Worn brushes frequently are the cause behind a motor running poorly.
Replacing brushes can fix a motor that’s operating intermittently.
New brushes can restore a motor’s electric braking.

Carbon brushes are one of the most commonly replaced power tool parts. This is because carbon brushes are wear items, meaning that through friction and use they will gradually wear away until they need replacing. Worn brushes are a common causes of intermittent motor function, reduced electric braking and reduced motor power. A worn-out brush will often be worn down near to the wire lead and can be cracked, pitted, or burned. When replacing carbon brushes, be sure to inspect your armature for burns, cracks, or other damage which can indicate larger motor problems.

Sours: https://www.ereplacementparts.com/
Best Grinder - 4-1/2\

Ridgid Octane Angle Grinder – R86042 18V 4-1/2″ Video Review

We’ve been using the Ridgid Octane angle grinder in the shop, on various jobs, for several weeks now. Everyone that has used it has been impressed with power and performance coming from the 18V platform. Home Depot sells the Ridgid R86042 Octane grinder for just $119 for the bare tool. And, we haven’t even gotten to our favorite part of the Ridgid grinder yet.

Ridgid Octane Angle Grinder - Battery

Ridgid Octane Angle Grinder Features

Many of the typical 4-1/2″ grinder features are included in the Ridgid cordless grinder as well. You get a tool-less guard that can easily move to your desired location. The auxiliary handle can be placed on the right or left, as well as the top/center (best for cutting). The Ridgid grinder is powered from the 18-volt platform and the Octane designation ensures you’re getting a brushless motor. In conjunction with their Octane batteries, you’re assured to get the best performance from the Ridgid Octane angle grinder.

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Not only does the Ridgid R86042 spin to 10,000 RPM, but it also keeps the torque as well. This grinder has the performance feel of a 15A corded grinder, but you don’t have to worry about the cord. This grinder does have a slide-lock power switch, which is not my preference, but it is just a preference. I prefer a paddle switch. I sure hope Ridgid will come out with a paddle-switch model.

Blinking Red Overload LED Lights

Our favorite feature is the red LED light that blinks when the tool is about to go into overload protection. When you see this light blink, you can back off the pressure just a bit and the Ridgid Octane angle grinder keeps on powering on. This eliminates the hassle of turning the grinder off and back on, or waiting for the overload to reset. Something that many other cordless grinders need.

Ridgid Octane Grinder Screens

Final Thoughts

This is an easy recommendation if you haven’t ventured into the cordless grinder world yet. Or, it’s still a good choice, even if you have. If you’re on the Ridgid platform, this is an easy choice for you. If you’re not, then buying the batteries and chargers will probably set you back another $200. You can buy the Ridgid grinder at the Home Depot for just $119, and this includes their lifetime service agreement when the tool is registered within 90 days of purchase. That’s hard to beat, especially when this includes the batteries.

Purchase the Ridgid Octane 4-1/2″ Grinder at the Home Depot here.


Sours: https://shoptoolreviews.com/metalworking/grinders/ridgid-octane-angle-grinder-r86042/35836/

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