Tools / Power Tools
User Manual for Bosch GNA 18V-16 Professional Nibbler
Quick guide for the Bosch GNA 18V-16 Professional nibbler. Includes setup, operation, maintenance, cutting tips, and safety instructions.
Table of contents
Quick guide from the manual
The Bosch GNA 18V-16 Professional is a cordless nibbler designed for cutting sheet metal without deformation. It is suitable for straight cuts, cutouts, and tight-radius curves. Key operational requirements include regular lubrication of the punch and die, and ensuring the tool is not used in a stationary setup.
Product description
The tool consists of the following main components:
- (1) Battery
- (3) On/Off switch
- (4) Die holder screw
- (7) Die holder
- (8) Punch
- (9) Die
- (11) Die knurled screw
Operation
Battery installation: Slide the charged battery into the base of the tool until it locks. To remove, press the release button.
Switching on/off: Slide the switch (3) forward to turn the tool on (symbol I) and backward to turn it off (symbol 0).
Changing cutting direction: The die holder (7) can be rotated in 90-degree increments. Loosen the screw (4), rotate the holder to the desired position, and retighten the screw securely.
Working advice
- Lubrication: To extend the life of the punch (8), apply a lubricant with good cooling properties (e.g., cutting oil) along the planned cutting line.
- Cutting: Hold the tool perpendicular to the sheet metal. Do not tilt the tool. Guide it with a light, even feed.
- Overload protection: If the tool is overloaded or the battery temperature is too high, the stroke rate will automatically reduce or the tool will switch off. If it switches off, turn it off completely and allow the battery to cool down before restarting.
- Curves and templates: For straight cuts, use a guide rail. For cutouts, pre-drill a 21 mm hole.
Maintenance and cleaning
Cleaning and lubrication: Clean and lubricate the punch (8) and die (9) every 3 hours of operation. Always remove the battery before performing any maintenance or changing accessories.
Replacing parts: If the punch or die becomes worn, replace them immediately to ensure good cutting quality and prevent damage to the tool. Do not sharpen the punch or die.
Manufacturer information
Bosch
Practical help
Common problems
Tool stops automatically during operation
Thermal overload protection has been triggered. Turn the tool off and allow the battery to cool down.
Punch gets stuck in the material
Stop immediately. Do not use force. Lubricate the punch and free the sheet metal.
Poor cutting quality or rough edges
The punch or die is likely worn. Replace both parts to restore performance.
Before use
- Ensure the battery is fully charged.
- Check that the punch and die are clean and properly lubricated.
- Verify the die holder is securely locked in the desired cutting direction.
- Wear protective gloves and safety glasses.
- Ensure the workpiece is stable and not clamped in a stationary vise.
Specs in practice
- Rated voltage
- 18V (Battery operated).
- Stroke rate (no-load)
- 1400 min-1.
- Max cutting thickness (Steel 400 N/mm2)
- 1.6 mm.
- Smallest curve radius
- 40 mm.
Images and diagrams
- The diagram on page 3 (A) illustrates the assembly of the cutting head, including the die holder (7), punch (8), die (9), and the knurled screw (11).
Model compatibility
- Compatible with Bosch GBA 18V and ProCORE18V battery series.
Manual page author
David Miller
Documentation analyst
Organizes user manual content into clear summaries, with attention to model details, product context, and everyday usability.