JD-5500 Nail Drill Machine
- Turn off the power before changing the bit .
- Check the cleanliness of the collet before assembling new bit
- Make sure that inside collet is clean.
- Please insert the bit in the bottom and lock the bit.
- Please choose standard bit rather than asymmetric or damaged bit.
- Place the bit which is not in use temporarily on a clean dry place.
- If the handle inside is damaged, we must let professional and technical personnel repair it or disassemble it.