Nova SE - Replacing the clutch replacement chuck head

The chuck head can be changed quickly and easily - use the removal aid to take out the old head, replace, and you're done!

The replacement chuck head is an indispensable accessory for your handpiece and ensures that your instruments are held securely and precisely. After prolonged use, the clamping force of the replacement chuck head can decrease, requiring it to be replaced – this is normal wear and tear, which can be easily remedied with this accessory. The contents of delivery include three replacement chuck heads along with a convenient removal aid, so that you can perform the change quickly and independently. Easy removal and cleaning at the end of the day ensures a long service life, while dust deposits can be effectively removed.

Cleaning and disinfection are possible with RUCK alcoholic surface disinfectant wipes.

Unscrew the handpiece sleeve from the suction hose to access the replacement chuck head. Use the removal aid provided to pull the replacement chuck head out of the handpiece body.

When the handpiece motor starts, there is a short, mechanical noise, which is completely normal and does not indicate a defect.

Background: Automatic phase alignment
Every motor – including the one in your Nova Pro or SE – must realign the polarity of the phases each time it is switched on. This process requires a highly brief change from clockwise to counterclockwise rotation (only for a fraction of a second) in order to find the correct direction of rotation.

Cause of noise: Intended play in the coupling
The replacement chuck head is connected to the coupling with a defined amount of play. This play is necessary so that the replacement chuck head can be attached without any problems. At the exact moment when the motor determines its direction of rotation, this small amount of play causes the audible ‘scratching’ noise.

What you can do
- Make sure that the replacement chuck head is correctly and completely locked in place.
- Make sure that a bur is inserted – operation without a bur can cause additional noise or change the perception.