Bosch

Bosch GWS8-45 Grinder

Grinder
900 watts
Corded electric
4.2 pounds

4.6/ 5 on Amazon2,100Amazon ratings700+bought last month4.4ProductDome score

More reviewed than 89%

High confidenceLast refreshed Aug 4, 2026Amazon data + ProductDome analysis · methodology

Best forYou need a corded angle grinder with high RPM for grinding or cutting metal

With a 900 watt motor and 11000 RPM speed in a 4.2 pound body, this corded grinder favors continuous power over cordless convenience.

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ProductDome scorecard

How it ranks among the 150 grinders we track

4.4/ 5ProductDome scoreHigh confidence

Owner satisfaction · 56% of scorecategory median 4.6★4.6

4.6★ across 2,100 Amazon ratings, Bayesian-smoothed toward the category average.

Evidence strength · 17% of scorecategory median 256 ratings4.2

2,100 Amazon ratings, weighted on a log scale so huge counts don't drown everything.

Buyer demand · 11% of score3.8

700+ bought on Amazon last month.

Data quality · 11% of score3.8

Brand identity, imagery, description and spec coverage.

The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 150 grinders we track - how the scorecard works · full grinders data report. Confidence: high - strong rating volume and complete data.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.

Overview

The Bosch GWS8-45 is a corded angle grinder with a 900 watt motor spinning at 11000 RPM. It weighs 4.2 pounds and measures 11 by 5.1 by 3.7 inches, built for grinding and cutting work on metal.

Bosch's angle grinders are common on job sites for cutting and grinding metal, and the GWS8-45 keeps the format compact at just over 4 pounds. The 11000 RPM speed paired with a 900 watt motor points to a tool built for quick material removal rather than slow precision work.

900 watt motor
11000 RPM speed
4.2 pound weight
Compact 11 x 5.1 x 3.7 inch body

Who it's for

This fits users grinding or cutting metal who want a corded tool with high RPM in a compact body. It is not for those who need cordless portability on outdoor or remote jobs.

Strengths and trade-offs

Drawn from this product's published specifications.

What stands out

High 11000 RPM cutting speed
Compact and light at 4.2 pounds
Corded design gives steady power

What to check first

Cord limits use away from outlets
No stated grinding wheel diameter

Performance notes

The 900 watt motor drives the disc to 11000 RPM, giving it enough speed for cutting and grinding metal stock. At 4.2 pounds and a compact 11 x 5.1 x 3.7 inch body, it stays maneuverable for one handed work, though the plug tethers it to a power source.

Specifications

Dimensions & fit
Brand	Bosch
Model	GWS8-45
Item Weight	4.2 pounds
Dimensions	11 × 5.1 × 3.7 inches
Capacity & performance
Speed	11000 rpm
Power & efficiency
Motor Power	900 watts
Power Source	Corded electric
Voltage	120 volts

How it compares

This product against the closest alternatives we track in grinders.

Product	Amazon rating	Ratings	ProductDome score
Bosch GWS8-45 GrinderThis product	4.6 / 5	2,100	4.4 / 5
DEWALT DCG413B GrinderDeWalt	4.8 / 5	9,600	4.6 / 5
Milwaukee 2880-20 GrinderMILWAUKEE	4.8 / 5	2,400	4.5 / 5
AVID MW590 GrinderAVID	4.5 / 5	6,100	4.4 / 5
Makita 9557PBX1 GrinderMAKITA	4.8 / 5	3,960	4.4 / 5

Frequently asked

Questions about the Bosch GWS8-45

Common buyer questions answered straight from the product spec data - no fluff, no "it depends".

What is the RPM of the Bosch GWS8-45?

11000 RPM.

Is the Bosch GWS8-45 corded?

Yes, it runs on 120 volt corded power.

How much does the Bosch GWS8-45 weigh?

4.2 pounds.