HiKOKI M 18DYA Cordless Cut-Out Tool Instruction Manual
Quick guide for the HiKOKI M 18DYA cordless cut-out tool, covering battery installation, bit replacement, depth adjustment, operation, and safety warnings.
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The HiKOKI M 18DYA is a cordless cut-out tool designed for window-removing and cutting gypsum board. This document provides essential instructions for safe operation, battery maintenance, and tool setup. Always ensure the battery is removed before performing any adjustments or maintenance.
Device description
The tool features a collet nut for bit retention, a depth guide for controlled cutting, a lock button for bit changes, and an integrated LED light for visibility. It is powered by an 18V lithium-ion battery.

First use and battery charging
Before using the tool, ensure the battery is fully charged. Connect the charger to a power source, insert the battery, and monitor the pilot lamp. A red light indicates charging is in progress; blinking indicates charging is complete or an error has occurred. Always charge at temperatures between 0°C and 40°C.

Operation
- Installing the bit: Use the provided wrench to loosen the collet nut, insert the bit, and securely tighten the nut.
- Adjusting depth: Adjust the depth guide so the bit protrudes at least 3 mm from the material.
- Switching on/off: The switch has an ON (I) and OFF (0) position. Ensure the switch is OFF before inserting the battery.
- Cutting: Always ensure the bit is not touching the workpiece before turning the tool on. Maintain a firm grip and follow the intended feed direction.
Safety and maintenance
The tool is equipped with overload and temperature protection. If the LED blinks, check the safeguard function table in the manual. Regularly inspect mounting screws, keep the motor winding clean, and ensure terminals are free of swarf and dust. Store the tool in a dry place below 40°C.
Manufacturer information
HiKOKI
Practical help
Common problems
The tool may be overloaded or the battery overheated. Release the switch, remove the cause of overload, or allow the battery to cool down.
Check if the battery is overheated (allow to cool) or if there is a malfunction in the battery/charger (contact dealer).
Check the safeguard function: Overload protection (remove cause) or Temperature protection (allow to cool).
Before use
- Ensure the work area is clean and free of buried objects like pipes or wires.
- Check the bit for cracks or damage.
- Ensure the collet nut is securely tightened.
- Verify the battery is fully charged.
- Ensure the depth guide is properly attached and adjusted.
Specs in practice
- No-Load Speed
- 28000 /min, the rotational speed of the tool without a load.
- Collet chuck capacity
- Supports 1/8" or 1/4" shank diameter bits.
Images and diagrams
- Fig 1: Overview of parts including collet, depth guide, and switch.
- Fig 3: Battery removal and insertion procedure.
- Fig 6: Bit installation using the wrench.
- Fig 8: Adjusting the depth of cut.
- Fig 11: Cutting operation and feed direction.
Model compatibility
- Use only genuine HiKOKI designated batteries.
- Compatible with UC18YFSL, UC18YSL3, and UC18YKSL chargers.
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.