11 - Bearings Flashcards
What is true about needle roller bearings?
They are susceptible to brinelling.
What does a regular click indicate when rotating a ball bearing by hand?
A cracked ring.
What can cause brinelling of a wheel bearing?
Heavy landing.
What is brinelling of a bearing?
Shallow smooth depressions caused by the rollers being forced against the cup due to overtorquing.
What loads is a tapered roller bearing designed to take?
Both radial and axial loads.
What do small indentations in the race of a ball bearing indicate?
Brinelling.
How should a ball bearing be positioned on a shaft during installation?
It should be carefully positioned using a soft steel or brass tube drift.
In which type of grease is graphite normally used?
Sodium based greases.
What is false brinelling of a bearing?
Indentations on the raceway due to load transferred through the bearing when static.
How should the bearing housing be packed with grease after assembly?
It should be lightly packed with grease.
How should you check a ball bearing for corrosion and foreign matter?
By oscillating and rotating it slowly to listen for roughness.
What type of load is a journal load?
Radial.
After wiping off grease from bearings for examination, in what should they be soaked?
White spirit.
How should a bearing be dried after cleaning?
With clean, warm, dry compressed air.
What do thrust bearings transmit?
Thrust loads, thus limiting axial movement.
What does chipping of a ball bearing indicate?
Spalling.
What type of bearings does a Hardy Spicer coupling have?
Needle bearings.
For which temperature applications are graphite greases used?
High temperature applications.
What should be done if ball or roller bearings are magnetised but otherwise undamaged during an engine overhaul?
They must be degaussed before use.
What element is included in the alloy for ball and roller bearings made from low carbon steel?
Nickel.
If a bearing is found to have distortion on inspection, what should be done?
Reject the bearing.
If a bearing shows signs of overheating on inspection, what should be done?
Reject the bearing.
When a bearing with an inner and outer ring is installed, which ring can be removed for inspection?
The outer ring can be removed from its housing for inspection.
