How to Change a Dremel Bit
Dremel manufactures a line of rotary tools for drilling, grinding and woodworking. The company's power tools use a patented collet-and-chuck locking system to hold bits for different applications and to allow a quick change-out of bits. For safety's sake, it is important to understand how to remove and securely install Dremel bits.
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Instructions
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Press and hold the silver-colored Shaft Lock Button near the front edge of the tool.
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Unscrew the metal collet nut on the end of the shaft by turning counterclockwise.
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3
Unscrew the plastic housing cap front at the end of the tool by turning counterclockwise.
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Remove the collet from the motor shaft. The collet is a small, metal, silver-colored tube wider in the front than the back, which inserts into the motor shaft.
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Place the collet inside the metal collet nut.
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Insert a Dremel bit through the collet nut and firmly into the collet. The Dremel tool comes with four collet sizes, so use a larger collet to accommodate the shank of larger Dremel bits. The bit should fit snugly inside the collet, with no wiggle or play back and forth.
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Thread the plastic housing cap back on the tool but do not tighten.
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Insert the collet into the drive shaft with the Dremel bit inside the collet and the collet nut over the assembly.
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Tighten the collet nut by hand and press the locking button when the nut is seated to secure the collet and Dremel bit. You will hear a click indicating the drill bit is locked.
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Hand tighten the housing nut and pull on the drill bit to ensure it is secure. Your Dremel tool is now ready to use.
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Tips & Warnings
The Dremel tool is designed to not operate if any of the collet parts are installed incorrectly. Even so, as a safety precaution, unplug the tool while changing the bits.
Wear safety goggles when using power tools.
