Worn or damaged handpiece back caps can cause turbines to run sluggishly. If turbine is new, and handpiece still does not come up to speed, the handpiece back caps may be the problem. Holes in back caps must remain clear to allow sufficient air flow to exit, allowing turbine to come to speed.
New Handpiece Back Caps Could Solve Your Handpiece Problems
Pushbutton back caps occasionally get bent, or damaged springs, which can cause button to contact chuck actuator button during operation. This causes reduced turbine speed and heat due to friction. Keep back caps clean and free of debris to ensure proper handpiece operation.