1 NOTE: To ensure a long service life, we recommend greasing your flex shaft every 40 hours of use.
BEFORE YOU BEGIN: Before performing any maintenance on your flex shaft, unplug the unit and remove the hand piece.
2 Lay both the motor and shaft on a flat surface. Using a flat-head screwdriver, loosen the set-screw on the motor housing, just above the shaft.
3 Slide the sheath down and remove it completely, exposing the inner shaft. Using a rag or shop towel, wipe the inner shaft to remove any existing, old grease.
4 Squeeze a small bead of grease (about 1/16" dia.) from the tube, then starting at the top of the shaft (closest to the motor) run the grease along the length of the shaft, stopping approximately 6" from the key end of the shaft.
5 Place the sheath back on to the shaft, then slide the sheath up all the way to the motor connector.
6 Adjust the placement of the shaft so that 3/4" of the shaft end is exposed at the end of the sheath. If too much of the shaft is exposed, the handpiece will overheat and wear prematurely. However, if the shaft doesn't extend far enough, the shaft itself could also overheat and suffer damage.
Once you have the sheath placement correct, tighten the set-screw to secure the sheath in place.
7 Hook the motor back onto the hanger and plug it in.
IMPORTANT: Do not attach the handpiece before hanging up and plugging in the motor.
8 Place a trash can under the shaft to catch any excess grease.
Run the motor at high speed for 10-15 minutes. Running the motor heats up the grease, allowing it to redistribute down and throughout the shaft (the excess grease will drip out of the end of the shaft and into the trash can. It's important to allow that excess grease to drip off, other wise the grease left in the handpiece may cause the handpiece to overheat.
Re-attach the handpiece for use.
REMEMBER: Perform this maintenance task about every 40 hours of use.