FEIN AMM 500 PLUS AS Oscillating Multi-Tool User Manual
Quick guide for the FEIN AMM 500 PLUS AS oscillating multi-tool. Includes safety instructions, tool change procedures, battery operation, and maintenance tips.
Table of contents
Manual images
Click an image to enlargeQuick guide from the manual
The FEIN AMM 500 PLUS AS is a high-performance oscillating multi-tool designed for sanding, sawing, scraping, and cutting. Before use, ensure the battery is fully charged and the accessory is securely mounted. Always wear appropriate personal protective equipment, including eye and ear protection and a dust mask.

Intended use
This tool is intended for sanding small surfaces, corners, and edges, sawing thin sheet metal, wood, and plastic parts, as well as scraping, polishing, rasping, cutting, and separating in weather-protected environments using FEIN-approved accessories.
Safety instructions
- Always hold the tool by the insulated gripping surfaces when performing work where the accessory might contact hidden wiring.
- Use clamps or other practical methods to secure and support the workpiece on a stable platform.
- Wear personal protective equipment, including face protection, safety goggles, dust mask, hearing protection, and protective gloves.
- Do not direct the tool against yourself, other persons, or animals.
- Clean ventilation openings regularly with non-metallic tools to prevent dust accumulation.
Tool change
The tool features a tool-free clamping system. To change an accessory:

- Ensure the tool is switched off.
- Open the clamping lever.
- Remove the old accessory.
- Insert the new accessory.
- Close the clamping lever securely.
Warning: Do not switch on the tool while the clamping lever is open, as this poses a risk of injury to hands and fingers.
Battery operation
The tool is compatible with 18V FEIN AMPShare Li-ion batteries. To check the charge level, press the button on the battery indicator. If no LEDs light up, the battery is defective and must be replaced.

Operating instructions
- Sanding: Press the tool with the sanding sheet briefly and firmly against a flat surface and switch it on. Work with the entire surface of the sanding plate.
- Sawing: Select a high oscillation frequency.
- Scraping: Select a moderate to high oscillation frequency.
Maintenance and cleaning
Regularly clean the ventilation slots and battery terminals with a soft, clean, and dry brush. Do not use chemical substances for cleaning the battery. If the tool has been used on gypsum-containing materials, blow out the ventilation openings and switch element with dry, oil-free compressed air.
Transport
The included Li-ion batteries are subject to Dangerous Goods Legislation. Users can transport the batteries by road without further requirements. When transported by third parties (e.g., air transport), special packaging and labeling requirements must be observed.
Manufacturer information
C. & E. Fein GmbH
Practical help
Common problems
Check the battery charge status. If no LEDs light up on the battery indicator, the battery is defective and must be replaced.
Do not switch on the tool. Pivot the clamping lever forward and back to close the clamping jaws before inserting an accessory.
Ensure the accessory is properly mounted and compatible with the tool.
Before use
- Ensure the battery is fully charged.
- Check that the clamping lever is fully closed.
- Wear appropriate personal protective equipment (eye, ear, dust protection).
- Ensure the accessory is securely mounted and compatible.
Specs in practice
- Oscillation rate
- 11,000 – 18,500 rpm for versatile material removal.
- Oscillation angle
- 2 x 1.7° for precise cutting and sanding.
Images and diagrams
- Page 3 shows the main components and controls.
- Pages 6-7 illustrate the tool change procedure.
- Page 8 shows the battery charge indicator.
Model compatibility
- Compatible with 18V FEIN AMPShare batteries.
- Compatible with Starlock and Starlock Plus accessories.
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.