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BOSCH

Bosch GWS8-45 4-1/2 In. Angle Grinder

  • Based on 7,409 reviews
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Availability: Only 3 left in stock, order soon!
Fulfilled by Amazon
Arrives Jan 17 – Feb 1
Order within 3 hours and 34 minutes
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Style: Adjustable


Features

  • POWERFUL MOTOR: Professional 7.5 amp motor delivers 11,000 no-load rpm
  • SLIM-GRIP DESIGN: Provides outstanding user comfort
  • DURABLE CARBON BRUSHES: Delivers extended tool life
  • TWO-POSITION SIDE HANDLE: Allows for greater control and utility
  • DIRECTED AIR FLOW: Diverts dust from vital components for durability
  • BURST-PROTECTION GUARD: Provides quick adjustments for user security
  • SERVICE MINDER BRUSHES: Eliminates guesswork, stopping grinder when preventative maintenance is required
  • LARGE SPINDLE LOCK: Provides easy disc changes

Description

The Bosch GWS8-45 4-1/2 In. Angle Grinder is a light, ergonomic grinder, with a slender grip circumference that allows users to work comfortably for extended periods. This 4.2 Lbs. tool delivers plenty of power, with a 7.5 Amp motor that produces 11,000 no-load RPM. It has directed air flow that diverts dust away from vital components. Bosch's Service Minder brush system shuts off the tool when preventative maintenance is required, which helps to eliminate guesswork. This grinder has a two-position side handle. It has a burst- protection quick adjustable guard designed for user protection, as well as a large spindle lock for easy disc changes.

Brand: Bosch


Material: Plastic


Product Dimensions: 11"L x 5.1"W x 3.7"H


Style: Industrial


Power Source: Corded Electric


Brand: ‎Bosch


Material: ‎Plastic


Product Dimensions: ‎11"L x 5.1"W x 3.7"H


Style: ‎Industrial


Power Source: ‎Corded Electric


Color: ‎Black


Item Weight: ‎5.44 Pounds


Voltage: ‎120 Volts


Wattage: ‎900 watts


Maximum Rotational Speed: ‎11000 RPM


Manufacturer: ‎Bosch


UPC: ‎000346488036


Part Number: ‎GWS8-45


Item Weight: ‎5.44 pounds


Item model number: ‎GWS8-45


Is Discontinued By Manufacturer: ‎No


Size: ‎11" in


Finish: ‎Brushed


Pattern: ‎Solid


Shape: ‎Rectangular


Item Package Quantity: ‎1


Measurement System: ‎Metric


Special Features: ‎lightweight


Included Components: ‎Grinder, Backing Flange, Lock Nut, Spanner Wrench, Type 27 Grinding Guard, Side Handle


Batteries Included?: ‎No


Batteries Required?: ‎No


Warranty Description: ‎Warranty


Date First Available: July 1, 2016


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Jan 17 – Feb 1

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Tough, Hardworking Grinder
Style: Industrial
I bought this grinder to use with poly abrasive stripping discs to remove paint on an older ranch house. I appreciate that the grinder is not heavy while still being beefy. The grip is small enough to run one handed, which I needed to do often while stretching arms length at the top of a ladder. The left-side push switch took some getting used to when using left handed. The constant on function works easily...push the switch forward and then press inward. I ran this grinder continuous for up to 15 minutes at a time, through a 5 pack of abrasive discs, over three days, grinding off old paint on wood siding. The grinder got warm, but never overheated. I was impressed. I like the safety guard. It fit the 4 1/2" x 7/8" poly discs perfectly with no contact. The guard requires an Allen key to loosen and reposition it. A clamping guard would be a plus. The auxilliary handle can be used on either left or right. One thing I. like is that the Allen key for the guard, and the wrench for the blade nut are all in one piece, an interesting tool, a little different from the standard wrench. The holes in the blade nut are standard width. It took me about one minute to assemble the tool out of the box. The single speed is rated 11,000 rpms, and I note it runs constant, and has not bogged down in my use. The wheel-lock on the back is red, and is easy to use while changing a blade. Glad I bought it. This is an excellent quality tool for professionals that definitely goes to the job site. ... show more
Reviewed in the United States on July 27, 2025 by Coffeeman
    • Powerful grinder - works if your left or right handed
Style: Industrial
This is a great grinder. Very powerful, fits all the grinder blades just fine. The handle can be attached on the left or right side, which was a nice touch. Not very loud either. Remember to wear your safety glasses!
Reviewed in the United States on September 14, 2025 by Rumor
    • Cutting all the things!
I initially bought this angle grinder so that I could remove an old-school basketball goal. Back in the day, people had to rig their own, as they couldn't just buy from the store. The previous homeowner had, decades ago, installed said goal with a big ol' steel pipe. The plywood that made up the actual goal was rotted to the point that I worried a stiff breeze would blow it right down onto my wife's car, so I bought the appropriate tool for the job and got to work. Bosch does good work for a good price. This is a basic angle grinder that will let you use those thin cutting wheels. The included wrench makes wheel swapping quick and easy. There's an appropriate guard, and a handle, for safety purposes. (You can change the handle to the other side so that, if you're left handed or approaching from that side, you have a good grip.) This tool has helped me not just with the stupid basketball goal that needed to come down, but a few other things as well. I've used it, without problem, to break down folding chairs so that they'll fit in recycling bins. My neighbor and I cut hardware panels for both of our fencing projects--again, no problems. This grinder is a solid tool that I'm happy to have in my garage because I never know when another use for it will come up. You also have a power switch that you can slide all the way up for continuous grinding, which is great if you're buffing something or otherwise spending a lot of time working with the tool on. As always, be safe. Wear both safety glasses and a face shield while working with this tool, especially if you're cutting metal. Angle grinders are no joke, so take this seriously. ... show more
Reviewed in the United States on August 31, 2019 by Chris Dixon
    • Good tool with a crappy wrench.
Style: Industrial
Had the older model before in Germany, loved it, that's why I bought it again. There is a new wrench with it, which is pretty disappointing... the pins are to thin, not a good hold if you want to tighten/untighten the disc. Wondering if Bosch Tech do a practise test before they release this crap. The old device came with 2 tools, a wrench to hold it and a kind of 2 pin like this one but much more precise with a good fit, not wobling around. Besides that still a good tool. ... show more
Reviewed in the United States on August 30, 2025 by R. Franz
    • Read the manual! But, yes, it can cut.
Style: Industrial
I bought this to cut some ~1/8" steel. In particular, this rack: https://www.amazon.com/dp/B002RYYY7C?psc=1&ref=ppx_yo2ov_dt_b_product_details The two rows of holes on each post are in line with each other so the rear set needs to be cut off. Not knowing that before I bought that rack, I bought this grinder to do the cutting. I was shocked to find that the manual claims that this grinder cannot be used for cut-off applications, because it doesn't say that anywhere on the Amazon page, or even on Bosch's website, unless you download the manual. However, other manufacturers such as Makita offer similar-sized grinders with the same or lesser specs that claim to support cut-off work, so I figured why not give it a shot. And sure enough, it works just fine. Just don't lay into it too hard and let the disc do the work. Also, wear adequate PPE and a dust mask or respirator, it generates tons of particles and stinks as the disc wears. Other 4.5" Bosch grinders claim to support cut-off applications, but it seems that Bosch has discontinued the "optional" cut-off guard, and finding guards for other brands of 4.5" grinders seemed equally challenging at this price point. It would appear that most people just toss a cut off disc in there and go, using the included "Type 27" guard that comes stock with this and any other brand of entry-level grinder. User beware, and be careful, but there are loads of videos on YouTube showing people using grinders to cut metal with Type 27 guards installed. Installing a Type 1 (flat) disc doesn't leave a lot of clearance with the included guard though, so I opted for a Type 27 cutoff wheel. This has the depressed center like the included grinding wheel, and offers better clearance. The one I got (Norton Blue Fire) says to use it with Type 27 guards, which happens to be what's included with this grinder. Despite this, the manual says not to use the included Type 27 guard for cut-off applications. It appears that there's a lot of conflicting information as to what can and can't be done. Or rather, what should or shouldn't be done. But for everyone wondering if this grinder is suitable for cutting, the answer is yes. Buy it, you'll be happy. It's inexpensive, and if you burn it out, just buy another. It'll still be less expensive than some of the other higher-end models out there. You'll be happy. ... show more
Reviewed in the United States on August 5, 2023 by Ben Huntsman

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