Needle

Question 1

What is the contact type known for roller bearings?

Answer 1

Line contact

Question 2

What types of loads can roller bearings handle?

Answer 2

Moderate to heavy loads

Question 3

What are the four categories of roller bearings?

Answer 3

• Cylindrical
• Needle
• Spherical
• Tapered

Question 4

Cylindrical roller bearings are designed for what type of load?

Answer 4

High radial load

Question 5

What are the limiting factors for thrust loading in cylindrical roller bearings?

Answer 5

• Heat generated
• Heat dissipated

Question 6

What factors limit speed in cylindrical roller bearings?

Answer 6

• Length-to-diameter ratio
• Grade of precision
• Roller guidance
• Type of cage
• Type of lubrication
• Shaft installation
• Housing accuracy
• Heat dissipation capability

Question 7

How is the shaft supported in cylindrical roller bearings?

Answer 7

At two points, normally at each end

Question 8

In cylindrical roller bearings, which side is fixed?

Answer 8

Drive side

Question 9

What is the length-to-diameter ratio in needle roller bearings?

Answer 9

6:1

Question 10

What are the characteristics of cage separated needle roller bearings?

Answer 10

• Has a bearing retainer
• Accommodates higher speeds
• Precision rolling

Question 11

What is another name for full complement needle roller bearings?

Answer 11

Drawn cup needle bearing

Question 12

What type of motion do cam-type and load-following bearings accommodate?

Answer 12

Both symmetrical and elliptical motion rotation

Question 13

What does the inner race of cam-type bearings incorporate?

Answer 13

Stem or shaft extending from the inner race

Question 14

What is the primary function of spherical roller bearings?

Answer 14

Answer for misalignment

Question 15

What is the accommodation range for misalignment in spherical roller bearings?

Answer 15

From .5 - 2 degrees

Question 16

What should the radial-to-thrust load ratio be in spherical roller bearings?

Answer 16

4:1 ratio

Question 17

What are the components of tapered roller bearings?

Answer 17

• Inner ring (cone)
• Outer ring (cup)

Question 18

What load types can tapered roller bearings handle?

Answer 18

• Heavy radial loads
• Thrust loads
• Both

Question 19

What is the relationship between the angle of the inner ring and load type in tapered roller bearings?

Answer 19

• Shallow angle = Radial load
• Steeper angle = Thrust load

Question 20

How are tapered roller bearings typically arranged?

Answer 20

In pairs facing opposite directions