Bauer 20V Brushless Cordless 4-1/2 Inch Angle Grinder Owner's Manual
Quick guide for the Bauer 20V Brushless Cordless 4-1/2 Inch Angle Grinder (Model 58308). Includes setup, operation, maintenance, and troubleshooting instructions.
Quick answers from the manual
Quick answer
- The Bauer 58308 is a 20V Brushless Cordless 4-1/2 Inch Angle Grinder. It requires a Bauer 20V Li-Ion battery and charger (sold separately). p. 1, 10
Key actions
- Install the wheel guard before operating. p. 12
- Install the side handle for control. p. 12
First start
- Install the wheel guard and side handle, then insert a charged battery pack. p. 11, 12
Problems and fixes
Check battery connection, charge, or thermal reset breaker.
p. 17Maintenance and reset
- If the thermal reset breaker trips, turn off the tool, allow it to cool, and press the reset button. p. 17
Technical specifications
| Parameter | Value | Meaning | Pages |
|---|---|---|---|
| No Load Speed | 10,500/min | Maximum rotational speed | p. 10 |
Where to find it in the PDF
- Components p. 11
- Assembly Diagram p. 19
Table of contents
Manual images
Click an image to enlargeQuick guide from the manual
This manual provides essential safety, setup, and operating instructions for the Bauer 20V Brushless Cordless 4-1/2 Inch Angle Grinder (Model 58308). Always read the full safety information before use. Ensure the battery pack is removed before performing any setup or maintenance.
Components
The grinder features a main handle, side handle, power switch, spindle lock button, wheel guard, and battery pack connection. Ensure all parts are intact before use.


Setup


Installing the Wheel Guard
- Depress the Spindle Lock Button and rotate the Clamp Nut until the spindle locks.
- Remove the Clamp Nut and Disc Flange.
- Install the Wheel Guard over the spindle.
- Rotate the guard to the desired position to shield you during work.
- Replace the Disc Flange, ensuring the flats on the bottom engage with the depressed center of the Wheel Guard.
- Check that the guard is firmly in place.
Installing the Side Handle
The side handle can be installed on either the left or right side of the grinder. Insert the handle into the desired position and turn clockwise to tighten.
Operation
Grinding and Wire Brushing:
- Grip the tool firmly in both hands.
- To start, press the back of the switch trigger down and push it forward.
- Allow the tool to reach full speed before touching the work material.
- Apply the wheel to the material at a 10° – 15° angle.
- To turn off, release the switch trigger.
- Always allow the tool to come to a complete stop before setting it down.
Maintenance
- Before each use: Inspect for damaged battery packs, loose hardware, or binding parts.
- After use: Wipe external surfaces with a clean cloth.
- Cleaning: Periodically blow dust and grit out of the motor vents using dry compressed air.
- Storage: Disconnect the battery pack and store the tool in a dry, indoor area out of reach of children.
Practical help
Common problems
Check battery connection and charge. If the thermal reset breaker tripped, allow the tool to cool and press the reset button.
Decrease pressure on the workpiece and allow the tool to do the work. Check battery charge.
Allow the tool to work at its own rate and clean blocked motor housing vents.
Before use
- Inspect tool for damage or loose hardware.
- Ensure battery is charged.
- Install wheel guard properly.
- Install side handle.
- Wear ANSI-approved eye protection and NIOSH-approved breathing protection.
- Ensure work area is clean and well-lit.
Specs in practice
- No Load Speed
- 10,500/min (RPM)
- Spindle Thread
- 5/8"-11 UNC
Images and diagrams
- Assembly diagram shows the internal components and part numbers for maintenance.
- Figure A illustrates the correct order for installing the wheel guard.
- Figure B illustrates the correct order for installing the grinding wheel and guard.
Model compatibility
- Use Bauer 20V Li-Ion Battery Pack (64816).
- Use Bauer 20V Li-Ion Charger (57006).
Manual page author
Michael Turner
Technical manual editor
Reviews PDF manuals for structure, safety notes, and practical product details so readers can find the right information quickly.