Tag: RCA
Bearing Damage by Load / Contact Patterns RCA: Typical RB Running...
Typical RB Running Traces
Typical Running Traces of Roller Bearings
(I) shows the outer ring running trace when a radial load is properly applied to a...
Damage by Load/Contact Patterns RCA: Typical DGBB Running Traces
Typical Running Traces of Deep Groove Ball Bearings
(A) shows the most common running trace generated when the inner ring rotates under a radial load...
Linear Guides RCA: Damaged Ball Recirculation Parts
Damage Condition
Balls become free from the ball slide due to broken plastic ball re-circulation parts.
Possible Causes
Ball re-circulation disabled by abnormal wear caused by...
Linear Guides RCA: Corrosion
Damage Condition
Corrosion on raceways and balls.
Possible Causes
Intrusion of water or corrosive substance
Inadequate lubricant
Improper storage
Countermeasures
Improve sealing function
Change to higher anti-acid...
Linear Guides RCA: Electrolytic Corrosion
Damage Condition
Pits like spot corrosion on balls and raceways.
Possible Causes
Caused by an electric current, creating sparks through a thin oil film, between the...
Linear Guides RCA: Flaking
Damage Condition
The rolling contact surface of the rail, the ball slide and the ball flakes away like scales.
Possible Causes
Natural life of a linear...
Ball Screw RCA: Breakage of Shaft End
Damage Condition
Shaft end (mainly bearing journal) broke completely.
Possible Causes
Rotational bending fatigue caused by misalignment of screw shaft (the bearing journal was forced to...
Ball Screw RCA: Breakage of Ball Recirculation Parts
Damage Condition
Damage on the tongue of ball return tube (ball pick up finger).
Possible Causes
Rotational speed exceeded the permissible rotational speed (d•N)
Countermeasures
Use of...
Ball Screw RCA: Fretting
Damage Condition
Frettings are on the raceways caused by a relative small amplitude of rubbing between mated contact surfaces. (It is also called fretting corrosion...
Ball Screw RCA: Wear
Damage Condition
Severe friction resulted in serious wear on the rolling contact surface of raceways.
Possible Causes
Insufficient lubrication
Intrusion of contamination
Poor assemble accuracy (Misalignment)
Countermeasures
Review...
