Introduction
This manual provides essential information for the safe and effective operation, maintenance, and troubleshooting of your SKIL PWR CORE 20 Brushless 20V Oscillating Tool Kit, model OS5937-10. Please read this manual thoroughly before using the tool and retain it for future reference.
Safety Information
Always prioritize safety when operating power tools. Failure to follow safety instructions can result in serious injury or property damage. For detailed safety guidelines, refer to the complete user manual available as a PDF: SKIL OS5937-10 User Manual PDF.
- Wear appropriate personal protective equipment (PPE), including eye protection, hearing protection, and gloves.
- Ensure your work area is clean, well-lit, and free from obstructions.
- Keep children and bystanders away while operating the tool.
- Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust.
- Always disconnect the battery pack before making any adjustments, changing accessories, or storing the tool.
Package Contents
Verify that all items listed below are included in your kit:
- 1x SKIL PWR CORE 20 Brushless Oscillating Multi-tool
- 35x Sanding Paper (14x 60-grit, 14x 120-grit, 7x 180-grit)
- 1x Sanding Pad
- 1x Bi-Metal Blade
- 1x HCS Wood Blade
- 1x HCS Segment Blade
- 1x Rigid Scraper
- 1x Accessory Case
- 1x 2.0Ah PWR CORE 20 Lithium Battery
- 1x PWR JUMP Charger

Image: The complete SKIL PWR CORE 20 Brushless 20V Oscillating Tool Kit, showcasing the multi-tool, battery, charger, accessory case, sanding pad, sanding papers, and various blades.
Setup
Battery Charging
The PWR JUMP charger is designed for rapid charging. Insert the 2.0Ah PWR CORE 20 Lithium Battery into the charger. The charger can bring the battery from 0% to 25% charge in approximately 5 minutes, and to a full 100% charge in about 45 minutes.

Image: A SKIL PWR CORE 20 battery being charged on the PWR JUMP charger, illustrating the rapid charging capability.
The PWR CORE 20 battery also features a PWRAssist USB port, allowing you to charge mobile devices directly from the battery.

Image: A SKIL PWR CORE 20 battery connected via USB cable to a smartphone, demonstrating its mobile charging capability.
Battery Installation and Removal
- Installation: Align the battery pack with the tool's battery port and slide it in until it clicks securely into place.
- Removal: Press the battery release button (usually located on the battery pack) and slide the battery out of the tool.
Accessory Installation and Removal (Tool-Free Blade Change)
The SKIL PWR CORE 20 Oscillating Tool features a quick-release lever for tool-free accessory changes.
- Ensure the tool is off and the battery is removed.
- Locate the quick-release lever on the head of the tool.
- Flip the lever to the open position. This will release the accessory clamp.
- Insert the desired blade or sanding pad onto the accessory mount, ensuring it is properly seated.
- Close the quick-release lever firmly until it locks into place, securing the accessory.

Image: A user demonstrating the tool-free blade change mechanism on the SKIL oscillating multi-tool, showing the quick-release lever in action.
Operating Instructions
Powering On/Off
- To Turn On: Slide the ON/OFF switch to the 'ON' position.
- To Turn Off: Slide the ON/OFF switch to the 'OFF' position.
Variable Speed Control
The tool features a variable speed control dial, allowing you to adjust the oscillation speed to match the material and application. Rotate the dial to increase or decrease the speed. Lower speeds are suitable for delicate materials or precise work, while higher speeds are for faster material removal.
Applications
This oscillating multi-tool is versatile and can be used for various tasks including cutting, sanding, and scraping. Select the appropriate accessory for your specific task.

Image: The SKIL oscillating tool actively cutting a tile, demonstrating its application and emphasizing its extended run time.
Vibration Reduction System (VRS)
The innovative Vibration Reduction System (VRS) isolates the motor from the tool's body, significantly reducing vibration transfer to the user. This feature enhances comfort during extended use and improves control.

Image: A close-up view of the SKIL oscillating tool's head, highlighting the VRS+ (Vibration Reduction System) feature and the integrated work light.
Constant Speed Technology
The tool's brushless motor, in conjunction with the PWR CORE 20 battery, utilizes Constant Speed Technology. This ensures that the tool maintains a consistent speed even when encountering harder materials or under load, providing a more uniform finish and efficient operation.
Maintenance
General Cleaning
- Regularly clean the tool's ventilation openings to prevent overheating.
- Wipe down the tool with a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners.
- Ensure all accessories are clean and free of debris before storage.
Battery Care
- Store batteries in a cool, dry place away from direct sunlight and extreme temperatures.
- Do not store batteries in a discharged state for extended periods. Charge them periodically.
- Inspect batteries for any signs of damage or leakage.
Troubleshooting
If you encounter issues with your SKIL Oscillating Tool, refer to the following common troubleshooting tips:
- Tool does not start: Ensure the battery is fully charged and properly inserted. Check the ON/OFF switch position.
- Reduced performance: The accessory might be dull or worn. Replace with a new, sharp accessory. Ensure the battery is fully charged.
- Excessive vibration: Verify that the accessory is correctly installed and tightened.
- Overheating: Check for blocked ventilation openings and clear any debris. Allow the tool to cool down.
For more complex issues, consult the full user manual or contact SKIL customer support.
Specifications
| Feature | Specification |
|---|---|
| Model Number | OS5937-10 |
| Voltage | 20 Volts |
| Power Source | DC (Battery Powered) |
| Battery Type | Lithium Ion (2.0Ah included) |
| Motor Type | Brushless |
| Special Features | Vibration Reduction System (VRS), Constant Speed Technology, Tool-Free Blade Change, PWRAssist Mobile Charging |
| Item Weight | 4.54 pounds |
| Product Dimensions | 13.19 x 11.02 x 3.74 inches |
| Included Components | Multi-tool, 35x Sanding Paper, Sanding Pad, Bi-Metal Blade, HCS Wood Blade, HCS Segment Blade, Rigid Scraper, Accessory Case, 2.0Ah Battery, Charger |

Image: A side profile view of the SKIL PWR CORE 20 Brushless Oscillating Tool, highlighting its ergonomic design and battery attachment.
Warranty and Support
The SKIL PWR CORE 20 Brushless 20V Oscillating Tool Kit comes with a 5-Year Limited Warranty. Please retain your proof of purchase for warranty claims.
For further assistance, technical support, or warranty inquiries, please refer to the official SKIL website or the contact information provided in the full user manual: SKIL OS5937-10 User Manual PDF.