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Bosch

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

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Availability: In Stock.
Fulfilled by Amazon
Arrives Tuesday, Oct 13
Order within 10 hours and 42 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


Power Source: Corded Electric


Voltage: 120 volts


Wattage: 900 watts


Maximum Rotational Speed: 11000 rpm


Material Type: Plastic


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


Item Weight: 4.2 pounds


Style Name: Industrial


Color: Black


Brand Name: Bosch


Model Number: GWS8-45


Global Trade Identification Number: 36


Manufacturer: Bosch


Manufacturer Warranty Description: Warranty


Unit Count: 1 Count


UPC: 000346488036


Number of Items: 1


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


Item Type Name: Corded Angle Grinders


Manufacturer Part Number: GWS8-45


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Oct 13

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
    • Excellent
Style: Industrial
Very good purchase
Reviewed in the United States on September 5, 2026 by Mariluz
    • Great a product/Price
Style: Industrial
Very sturdy and lots of power . Very good price !
Reviewed in the United States on May 27, 2026 by bluechip
    • STRONG
Style: Industrial
THIS FIGHTS ABOVE IT'S WEIGHT. SURPRISED ME HOW STRONG IT IS. I'M SHARPENING TRACTOR BLADES.
Reviewed in the United States on August 14, 2026 by SSMITH
    • Fairly good for the price
Style: Industrial
Now, disclaimer, I'm fairly novice with grinders. I bought this for the welding class I'm in, in which I grind lots of metal all day everyday. It's pretty resilient, fairly powerful, and still smaller than others which to me is great. I do have some complaints though, some may be more specific to my situation than others, I'm not sure. The tool itself while small can still be awkward to hold, especially if what your grinding is higher up than hips/waist height, the placement of the handle going more forwards also adds to this problem. Another issue is how the safety guard attaches/adjusts, it goes on the very back layer and you have to position it properly in one of the set places, then screw it tight to keep it there, meaning if you frequently want/need to adjust, it's pretty tedious. Overall it's plenty great for my purposes, just some minor things to consider and how it will impact your usage ... show more
Reviewed in the United States on January 31, 2024 by Jenna
    • 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
    • Can’t go wrong with g with this.
Style: Industrial
Was the best choice for me out of the dozens of models for sale. Good ergonomics and powerful. I have had good luck with Bosch power tools.
Reviewed in the United States on May 10, 2026 by Carlgo
    • New again
Style: Industrial
Does a great job
Reviewed in the United States on August 21, 2026 by Josephine M. Wagner

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