STEP 12
Test the handpiece by rotating the bur between your thumb and forefinger. The
rotation should be smooth and easy, without drag.
TIP: At first it may not feel as smooth as it should. Squirt a one
second blast of The Dentist’s Choice “Once a Day” lubrication into
the air intake port. Put the handpiece on “air”. Hold it at 38 p.s.i.
for about 30 seconds. It should start to wind up to full speed. It will
whine when it is at full power.
When testing the handpiece, flip the water on to make sure the water
lines are clear. Always test for torque or cutting power. Use a
seashell for testing the handpiece. A piece of plastic does not work, it melts. When testing for
torque, a Lares 330E will stop at about 6oz to 8oz of pressure. If it is not running properly it will
stop the instant you touch something hard. If it cuts well and sounds good, it is done!
