Bosch GWS18V-45PSC 4-1/2 in. Angle Grinder

NEW Bosch Brushless 4-1/2 in. Angle Grinder With Electronic Interface

The Bosch GWS18V-45PSC 4-1/2 in. Angle Grinder has a  brushless motor provides better power, runtime, and an advanced user interface.

Bosch User Interface

On-tool HMI (human/machine interface) screen combines with expanded app capability to provide a complete look at grinder performance and working status


This user interface on the Bosch GWS18V-45PSC 4-1/2 in. Angle Grinder allows the user to change the tool speed with the push of a button and the interface changes color depending on the status of the tool: green for operational; yellow identifies an issue with the grinder like higher motor temperatures; red means the grinder is offline; and blue means the grinder is connected to a mobile device.


The included Bosch GCY30-4 Bluetooth module allows the grinder to connect to a mobile device with the free Bosch Toolbox App which can be found at the Apple App Store ® or the Google Play ® Store. The Bosch Toolbox App allows users to make some changes to tool function including changing speed of the soft-start feature, setting LED brightness, and the ability to monitor battery charge and safety information.


Advanced electronics also provide safety features including drop control, which shuts off the tool if dropped, and kick-back control that shuts down the grinder’s motor if it becomes jammed. There’s also restart protection–preventing the tool from starting up when inserting a fresh battery.


The Bosch GWS18V-45PSC 4-1/2 in. Angle Grinder features a two-position Vibration Control side handle, which provides greater control than previous generation Bosch cordless grinders. It also makes operation of the grinder less fatiguing for the user. The side
handle can switch from left to right for additional control and a slim soft-grip design provides additional user comfort.

Expect to see this grinder in a kit:

  • Bosch GWS18V-45PSC 4-1/2 in. Angle Grinder  (kit)  with no-lock on paddle switch
  • CORE18V GBA18V63 18V 6.3 Ah battery
  • BC1880 18V fast charger
  • wheel guard
  • communication module
  • vibration control handle
  • grinding disc
  • carrying bag

Bosch was kind enough to send us one of these brand new grinders to test. Our review will be coming soon!

To learn more about Bosch products click here.

About the author

Ethan Bickford

Ethan Bickford has a long history with carpentry. His father worked as a contractor for many years and taught him the ins and outs of home repair and remodeling from a very young age. He now works as a carpenter in the Boston area. Ethan loves teaching and advising on tools and techniques and is a big fan of quality workmanship. His motto is: “Do it right the first time!”

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