Tools / Power Tools
Bosch Professional 18V-85 C Drill/Driver User Guide
Quick start guide for the Bosch Professional 18V-85 C drill/driver, covering assembly, operation, safety instructions, and technical specifications.
Table of contents
Quick guide from the manual
This document provides essential information for the safe and efficient operation of the Bosch Professional 18V-85 C drill/driver. Always ensure the battery is removed before performing any maintenance, changing tools, or transporting the device to prevent accidental activation.
Device Description
The tool is designed for driving and loosening screws, as well as drilling in wood, metal, ceramic, and plastic. The GSB model is additionally designed for impact drilling in brick, masonry, and stone.
Assembly
Battery Charging: Use only the chargers listed in the technical data. The battery is supplied partially charged; fully charge it before first use. The Li-ion battery is protected against deep discharge by Electronic Cell Protection (ECP).
Auxiliary Handle: Always use the tool with the auxiliary handle (4). To mount, turn the lower gripping end anticlockwise, pull back the intermediate piece (5), slide the handle over the chuck, release the intermediate piece, and retighten the handle.
Drilling Depth: Use the depth stop (3) to set the required drilling depth X by loosening the wing bolt (6) and adjusting the stop.
Operation
Rotational Direction: Use the rotational direction switch (16) to change the direction. Right rotation for drilling and driving screws; left rotation for loosening screws and nuts.
Operating Modes: Use the mode selector switch (8) to choose between Drilling, Screwdriving, or Impact Drilling (GSB model only).
Speed and Torque: Adjust speed by varying pressure on the on/off switch (17). Use the torque presetting ring (7) to select the required torque in 25 stages for screwdriving.
KickBack Control: This feature provides better control and user protection by shutting off the tool if it suddenly rotates around the drilling axis. A flashing LED indicates activation.
Maintenance and Cleaning
Always keep the power tool and ventilation slots clean for safe and efficient operation. Remove the battery before any maintenance work.
Manufacturer information
Bosch
Practical help
Common problems
Tool does not start
Check if the battery is charged and properly inserted. If KickBack Control is faulty, the tool cannot be switched on; have it serviced by a qualified professional.
Battery charge indicator does not light up
The battery may be defective and needs to be replaced.
Tool shuts off automatically
The battery is likely discharged or the tool has overheated. Allow the tool to cool down or charge the battery.
Before use
- Ensure the battery is fully charged.
- Check that the auxiliary handle is securely tightened.
- Verify the correct rotational direction is set.
- Ensure the correct operating mode is selected.
- Check that the drill bit or screwdriver bit is securely clamped in the chuck.
Specs in practice
- Rated voltage
- 18V, indicating the battery system compatibility.
- No-load speed
- 0-480 min-1 (1st gear) and 0-2100 min-1 (2nd gear), determining the drilling/screwing speed.
- Max. drilling diameter
- Up to 82mm in wood, 13mm in steel, and 16mm in masonry (GSB model).
Images and diagrams
- The diagram shows the tool components including the keyless chuck (2), depth stop (3), auxiliary handle (4), and mode selector switch (8).
- Figure A illustrates the tool change procedure.
- Figure B shows the rotational direction switch (16) settings.
Model compatibility
- Compatible with all Bosch Professional 18V batteries (GBA 18V and ProCORE18V).
- Supports Bluetooth Low Energy Module GCY 42 for connectivity features.
Manual page author
Emily Carter
User documentation editor
Prepares concise manual descriptions and highlights the most useful setup, operation, and maintenance information for readers.