anti friction bearings Flashcards
What is an anti-friction Bearing?
The inner ring sits on the shaft when mounted it is made of hardened, high-grade steel the surface on which the rolling members roll called the raceway grinds to vary fine finish to reduce friction
Name six anti-friction bearing types
Four point contact bearing
Self aligning ball, Bearing
thrust ball bearing
angular contact ball
bearing single row
deep groove ball bearing single row
deep groove ball bearing double row
name 3 factors of bearings loads?
area of contact
direction of load
loaded zone
under a ball bearing it is circular until a load applies to the ball and the it becomes what?
elliptical
single row deep groove ball bearing
most common type of ball bearing . sometimes called a Conrad bearing
general purpose
suport radial load
tolerates very little angular misalignment between inner and outter races
Maximum capacity, deep groove ball bearing is assembled with more balls. This is made possible by loading white.
By loading slots machined into the inner and outer raceways
What bearing is even more sensitive to misalignment than the deep groove Bearing?
Maximum capacity, deep groove, ball bearing
Why is the double row deep groove ball bearing largely replaced by double row angular contact bearing
Because of the filing slots, it is restricted to mainly radial loads
Where is a internally self aligning Bearing used?
It is used when alignment is impractical or impossible to maintain this problem of misalignment is often do to shaft deflection
T or F
internal self aligning bearings are available with a tapered board for mounting on a taper adaptor sleeve
true
This allows you to mount the bearing on the shaft wherever you want
true or false
Self aligning, ball bearings can operate at high speeds with extreme accuracy
true
You can use a cylindrical roller thrust bearing for very heavy ?
thrust loads
Double row angler contact ball bearing offers what features
It takes heavy radio and axle loads in both directions
It’s speed rating is lower than deep groove, ball bearing or a single row angler contact bearing
Cannot tolerate any misalignment
Needle bearings can have no cage, no inner ring or machined inner and outer rings. They are
2.5-10 times their diamter
Tapered roller bearings take both axial and radial loads. The inner ring and outer ring are called
inner ring is called the cub
out ring is called the cone Tapered roller bearings take both axial and radial loads. The inner ring is called
The double row spherical roller bearing has ——–shaped rollers that carry heavy loads and has internal self aligning capabilities. They are good for radial and axial loads.
barrel
true or false. Carb bearings can take some misalignment, allows more axial displacement (movement). But not good for axial loads.
TRUE
The first number in the 4 digit ISO code (metric) identifies the ?
type of bearing
the second 2 numbers in a 5 digit code is the
dimension series
what bearings can take some misalignment, allows more axial displacement (movement). But not good for axial loads.
carb
In both codes the last 2 numbers are the bearings are?
the bore
numbers indicate the amount of internal clearance. Normal clearance is between C 2 and C 3 and is not put on the bearing.
C
c1,c2,c3,c4,c5 indicate the amount of internal clearance. C1 is the smallest clearance C5 Is the largest.
normal clearance lies between?
c2-c3
What letter indicates a tapered for if it’s ratio is 1:12
K
If the taper ratio is 1:30 as it is on, very large bearings the designation is what?
k30 but not constanct with all manufactures
True or false
The speed limit of a bearing depends on how smoothly it rolls, and how much friction it has
true
