Bosch Professional 18V-210 C Impact Wrench User Guide
Quick guide for Bosch GDR, GDX, and GDS 18V-210 C Professional impact wrenches. Learn how to use Bluetooth connectivity, configure custom modes (A and B), and utilize automatic shut-off and bolt release features.
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This document provides a visual overview of the Bosch GDR, GDX, and GDS 18V-210 C Professional impact wrenches. It focuses on the integration of the GCY42 Bluetooth module and the configuration of specialized operating modes via the Bosch Toolbox app.
Bluetooth connectivity and module installation
To enable advanced features, the GCY42 Bluetooth Low Energy module must be installed in the designated slot on the tool. Once installed, you can connect the tool to your smartphone using the Bosch Toolbox app. This connection allows for the customization of operating modes and access to additional tool settings.

Operating modes
The tool features two primary customizable modes, A and B, which can be configured for specific tasks:

- Mode A: Optimized for self-drilling metal screws. Features include automatic slow-down and auto shut-off to prevent over-tightening.
- Mode B: Optimized for wood screws. Features include automatic slow-down and auto shut-off to ensure precise driving.
Advanced features
When connected via Bluetooth, the tool offers automated functions to improve efficiency and prevent damage:
- Auto Bolt Release: Automatically stops the tool when a bolt is loosened to prevent it from falling.
- Auto Slow Down: Reduces tool speed automatically as the fastener reaches the desired depth or tightness.
- Auto Shut-off: Stops the motor automatically once the task is completed to prevent damage to the material or fastener.
- Timed Shut-off: Allows for a controlled stop after a specific duration.
Manufacturer information
Bosch
Practical help
Common problems
Ensure the correct mode (A or B) is selected and configured via the app to utilize the Auto Slow Down and Auto Shut-off features.
Enable the Auto Bolt Release mode via the app to ensure the tool stops automatically when the bolt is loose.
Before use
- Install the GCY42 Bluetooth module into the tool.
- Download and install the Bosch Toolbox app on your smartphone.
- Pair the tool with your smartphone via Bluetooth.
- Configure Mode A or B in the app based on your specific application (metal vs. wood).
Images and diagrams
- Page 1 shows the location of the GCY42 module slot and the pairing process.
- Page 2 illustrates the behavior of the tool in different modes, showing where the tool automatically slows down or stops.
Model compatibility
- Compatible with GDR, GDX, and GDS 18V-210 C Professional models.
- Requires Bosch Toolbox app for full feature access.
Manual page author
Emily Carter
User documentation editor
Prepares concise manual descriptions and highlights the most useful setup, operation, and maintenance information for readers.