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The Common Faults and Treatment Methods of High Speed Dental Handpieces

2.1.1 Fault 1

Symptom: The bur can not be pressed or caught.

Causes and treatment methods:

(1) The diameter of the tail of the bur is small and does not meet the requirements: replace the standard bur.

(2) The dirt is plugged into the groove of the chuck, and the chuck cannot be closed: the chuck is cleaned.

(3) Three-leaf spring wear and rupture: replace the three-lobed spring.

(4) The bur and the clamping mechanism are rusted: the bur and the clamping mechanism are replaced, oiled, cleaned and maintained regularly.

2.1.2 Fault 2

Symptom: The handpiece does not have water or a small amount of water.

Causes and treatment methods:

(1) The water supply pressure is insufficient, the water adjustment switch is not open: open the water switch to adjust the normal water pressure.

(2) The handpiece leather line is blocked: the leather line is dredged.

(3) There is dirt in the water jet of the handpiece: clean the dirt and keep the water outlet.

(4) The internal waterway of the handpiece is blocked: the internal waterway is dredged.

2.1.3 Fault 3

Symptom: Water leakage from the connection between the handpiece and the leather cord or quick-change connector.

Causes and treatment methods:

(1) The connection between the handpiece and the leather line is not tightened: it can be tightened.

(2) The four-hole or two-hole gasket on the tail of the handpiece is aging deformation and damage: replace the gasket.

(3) The front end of the quick-change joint is deformed: If the original shape cannot be restored, it is recommended to replace the quick-change joint.

(4) The small O-ring at the front end of the quick-change joint is seriously worn: replace the O-ring.

2.1.4 Fault 4

Fault phenomenon: When the handpiece is used, the sound is abnormal, the noise becomes large, the rotation speed is slow, and the cutting force is too small.

Causes and treatment methods:

(1) The head of the handpiece is deformed by a fall, and the running resistance of the wind wheel is large: it is rotated and repaired with a head repair tool.

(2) Bearings lack clean lubrication: add handpiece cleaner and lubricant.

(3) The bur is bent and deformed, and the back cover of the handpiece is loose: replace the standard bur and tighten the back cover of the handpiece.

(4) Bearing damage: Replace the bearing. (Note: different bearings, loading and unloading tools are also different, do not barbaric loading and unloading, the bearing has a direction, the dust cover is facing outward, the cage is close to the wind wheel.)

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