Anti Friction Bearings Flashcards
What do anti friction bearings use?
Rolling elements
How are anti friction bearings classified?
By the type of rolling element used
What are the two main types of anti friction roller bearings classifications?
Ball
Roller
What are the 4 variations of roller bearings?
Cylinder
Needle
Tapered
Spherical
What is another name for deep grooved ball bearing?
Conrad
What is the most common anti friction bearing?
Single row deep groove ball bearing
(Conrad)
What loads can a single row deep groove bearing support?
Radial
Although it can take combination and moderate axial loads in both directions
What is a single row deep groove ball bearings toleration for angular misalignment?
Very low
Where is the single row deep groove ball bearings contact angle?
It changes with the direction of the loading bearing
What is the difference between the single row deep groove ball bearing and the maximum capacity deep groove ball bearing?
The maximum capacity bearing is assembled with more balls
What is the radial load capacity of the maximum capacity deep groove ball bearing in comparison to the single row deep groove ball bearing?
Higher radial load capacity
What is the axial load capacity of the maximum capacity deep groove ball bearing in comparison to the single row deep groove ball bearing?
Much less
What is the significance of the radial load on a double row deep groove ball bearing?
Higher radial load capacity without increasing the radial dimensions
What is the double row deep groove ball bearing limited to?
Radial loads do to the filling slots
What are the 3 types of deep groove ball bearings?
Single row
Maximum capacity
Double row
When are internally self aligning ball bearings used?
When alignment is impractical or impossible to maintain
OR
when the shaft is moving at high speeds and extreme accuracy is required
How do internally self aligning ball bearings handle thrust load?
Only relatively small thrust loads can be handled
Can the self aligning ball bearings come with a tapered bore/sleeve (y/n)
Yes
Describe the externally self aligning ball bearing
Deep groove ball bearing
Spherically ground outer ring
Mounts to a special housing
What does the externally self aligning ball bearing allow for?
Misalignment
When does the externally self aligning ball bearing NOT preform well?
Shaft wobble
What load are single row angular contact ball bearings?
Combination bearings
How do single row angular bearings handle thrust load?
Extremely well in one direction
What must a single row angular contact ball bearing operate with?
Axial load component
In reference to the single row angular contact ball bearing the axial load capacity ____________ with a ______________ in the contact angle
Increases
Increase
How can you adjust the internal clearance (pre load) on a single row angular contact ball bearing?
Move the inner or outer rings axially
What specialty style are single row angular contact ball bearings available in?
Precision
What loads can double row angular contact ball bearings take?
Heavy radial and axial loads
How does double row angular contact ball bearings tolerate misalignment?
They don’t.
What’s the benefit of using double row angular contact ball bearings?
Requires less axial space than two single row angular contact ball bearings
How would you find the bore size of a 32208 bearing?
08 x 5
40
How would we check the clearance on pillow block bearings that are stopped but NOT disassembled
Use a pry bar and dials
Why would you select a C2 type bearing over a standard anti friction bearing?
We require a slightly tighter fit
Typically for less noise and vibration
