Bearings Flashcards
Pato says the free space between bearing and shaft is known as Clerence, Jelanie disagrees and says this is nominal dimension. who is right?
pato
PB is also equal to _________ divided by ________
force divided by projected area
remember formula for pressure
pa= force/Area
where do rolling elements operate?
between inner and outer ring/race
what are two types of bearing fits?
define each one
free fit- shaft diameter is smaller than bearing diameter
shrink fit- shaft diameter slightly larger than bearing diameter
formula for bearing pressure?
PB= Pg × dsquared / 4 × AP
Pg= Gas Presure
d2= diameter squared
4= 4
AP= projected area
PB= Bearing pressure in Pascals or KPA kilo pascals
Bearing pressure is important because it can help determine how well a Bearing can __________^
withstand/handle a given load
bearing pressure is the _______ per _____ area exerted on a _________ between rolling _______
force
unit
surface
elements
which part of the bearing remains stationary during operation?
inner ring
how to calculate Projected Area (AP)
length of bearing × diameter of bearing = Projected Area
PA= L×D
length of the bearing is calculated by ________ projected_____ by the diameter of the ____________
dividing
projected area
bearing
what are 4 functions of bearings?
1Alignment
2Load Support
3Friction and Wear Reduction
4Vibration Reduction
Name 5 Bearing in Vehicles
Engine Bearings
Wheel Bearings
Transmission Bearings
Alternator Bearings
Suspension Bearings
The amount by which shaft diameter exceeds the bearing diameter?
Interference
What is a bearing?
A machine element that reduces friction and wear while allowing for smooth rotational and linear movement
the difference between shaft diameter and bearing diameter is known as?
allowance
what is the general purpose of bearings?
to allow smooth and controlled rotational and linear movement while reducing friction and wear
What are the major parts of bearings?
outer ring
rolling element
inner ring
what measurement gives the size of a part?
nominal dimension
Gas Pressure is identified as what? GP or PG
pg
what are the 3 types of common bearings?
roller bearings
sleeve bearing
ball bearings
the difference permitted between the maximum and minimum dimensions of a part is know as ?
tolerance
what are some common bearing materials?
steel
bronze
composite material
ceramics
list all the bearing dimensions
allowance
tolerance
interference
Clerence
nominal dimension
list 7 desired properties of bearings:
load and strength
corrosion resistance
low friction
high wear resistance
lubrication properties
thermal stability
low expansion
