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A self-aligning ball bearing has a basic dynamic load rating (C10, for 106 revolutions) of 35 kN. If the equivalent radial load on the bearing is 45 kN, the expected life (in 106 revolutions) is
- a)below 0.5
- b)0.5 to 0.8
- c)0.8 to 1.0
- d)above 1.0
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
A self-aligning ball bearing has a basic dynamic load rating (C10, for...
The approximate rating of service life of a ball or roller bearing is based on the fundamental equation.
where L is rating life, C is basic dynamic load, W is equivalent dynamic load
k = 3 for ball bearing
k = 10/3 for roller bearing
The relationship between the life in revolutions (L) and the life in working hours (LH) is given by:
L = 60 N.LH revolutions
where N is the speed in rpm
Calculation:
Given: C = 35 kN, W = 45 kN
where L is rating life, C is basic dynamic load, W is equivalent dynamic load
k = 3 for ball bearing
k = 10/3 for roller bearing
The relationship between the life in revolutions (L) and the life in working hours (LH) is given by:
L = 60 N.LH revolutions
where N is the speed in rpm
Calculation:
Given: C = 35 kN, W = 45 kN
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Community Answer
A self-aligning ball bearing has a basic dynamic load rating (C10, for...
Basic Dynamic Load Rating (C10):
- The basic dynamic load rating (C10) is a standardized rating given to bearings to indicate their load-carrying capacity.
- It represents the load, in kilonewtons (kN), that the bearing can withstand for a basic rating life of 106 revolutions.
Equivalent Radial Load:
- The equivalent radial load is the load that a bearing would experience if it were subjected to a combination of radial and axial loads.
- It is calculated based on the actual radial and axial loads acting on the bearing.
Expected Life:
- The expected life of a bearing is the number of revolutions that it is expected to complete before the first signs of fatigue occur.
- It is influenced by factors such as load, speed, lubrication, and operating conditions.
Solution:
- Given that the basic dynamic load rating (C10) of the self-aligning ball bearing is 35 kN and the equivalent radial load is 45 kN.
- The equivalent radial load exceeds the basic dynamic load rating, indicating that the bearing is subjected to a higher load than its rated capacity.
- In such cases, the bearing is expected to have a relatively short life.
Comparison of Equivalent Radial Load and Basic Dynamic Load Rating:
- If the equivalent radial load is less than or equal to the basic dynamic load rating (45 kN ≤ 35 kN), the expected life of the bearing is considered to be above 1.0 (greater than 1.0 x 106 revolutions).
- However, if the equivalent radial load exceeds the basic dynamic load rating (45 kN > 35 kN), the expected life of the bearing is significantly reduced.
- In this case, the expected life of the bearing is below 0.5 (less than 0.5 x 106 revolutions).
Conclusion:
- Based on the given information, the expected life of the self-aligning ball bearing is below 0.5 (option 'A').
- The basic dynamic load rating (C10) is a standardized rating given to bearings to indicate their load-carrying capacity.
- It represents the load, in kilonewtons (kN), that the bearing can withstand for a basic rating life of 106 revolutions.
Equivalent Radial Load:
- The equivalent radial load is the load that a bearing would experience if it were subjected to a combination of radial and axial loads.
- It is calculated based on the actual radial and axial loads acting on the bearing.
Expected Life:
- The expected life of a bearing is the number of revolutions that it is expected to complete before the first signs of fatigue occur.
- It is influenced by factors such as load, speed, lubrication, and operating conditions.
Solution:
- Given that the basic dynamic load rating (C10) of the self-aligning ball bearing is 35 kN and the equivalent radial load is 45 kN.
- The equivalent radial load exceeds the basic dynamic load rating, indicating that the bearing is subjected to a higher load than its rated capacity.
- In such cases, the bearing is expected to have a relatively short life.
Comparison of Equivalent Radial Load and Basic Dynamic Load Rating:
- If the equivalent radial load is less than or equal to the basic dynamic load rating (45 kN ≤ 35 kN), the expected life of the bearing is considered to be above 1.0 (greater than 1.0 x 106 revolutions).
- However, if the equivalent radial load exceeds the basic dynamic load rating (45 kN > 35 kN), the expected life of the bearing is significantly reduced.
- In this case, the expected life of the bearing is below 0.5 (less than 0.5 x 106 revolutions).
Conclusion:
- Based on the given information, the expected life of the self-aligning ball bearing is below 0.5 (option 'A').
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A self-aligning ball bearing has a basic dynamic load rating (C10, for 106 revolutions) of 35 kN. If the equivalent radial load on the bearing is 45 kN, the expected life (in 106 revolutions) isa)below 0.5b)0.5 to 0.8c)0.8 to 1.0d)above 1.0Correct answer is option 'A'. Can you explain this answer? for Civil Engineering (CE) 2025 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about A self-aligning ball bearing has a basic dynamic load rating (C10, for 106 revolutions) of 35 kN. If the equivalent radial load on the bearing is 45 kN, the expected life (in 106 revolutions) isa)below 0.5b)0.5 to 0.8c)0.8 to 1.0d)above 1.0Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A self-aligning ball bearing has a basic dynamic load rating (C10, for 106 revolutions) of 35 kN. If the equivalent radial load on the bearing is 45 kN, the expected life (in 106 revolutions) isa)below 0.5b)0.5 to 0.8c)0.8 to 1.0d)above 1.0Correct answer is option 'A'. Can you explain this answer?.
A self-aligning ball bearing has a basic dynamic load rating (C10, for 106 revolutions) of 35 kN. If the equivalent radial load on the bearing is 45 kN, the expected life (in 106 revolutions) isa)below 0.5b)0.5 to 0.8c)0.8 to 1.0d)above 1.0Correct answer is option 'A'. Can you explain this answer? for Civil Engineering (CE) 2025 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about A self-aligning ball bearing has a basic dynamic load rating (C10, for 106 revolutions) of 35 kN. If the equivalent radial load on the bearing is 45 kN, the expected life (in 106 revolutions) isa)below 0.5b)0.5 to 0.8c)0.8 to 1.0d)above 1.0Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A self-aligning ball bearing has a basic dynamic load rating (C10, for 106 revolutions) of 35 kN. If the equivalent radial load on the bearing is 45 kN, the expected life (in 106 revolutions) isa)below 0.5b)0.5 to 0.8c)0.8 to 1.0d)above 1.0Correct answer is option 'A'. Can you explain this answer?.
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A self-aligning ball bearing has a basic dynamic load rating (C10, for 106 revolutions) of 35 kN. If the equivalent radial load on the bearing is 45 kN, the expected life (in 106 revolutions) isa)below 0.5b)0.5 to 0.8c)0.8 to 1.0d)above 1.0Correct answer is option 'A'. Can you explain this answer?, a detailed solution for A self-aligning ball bearing has a basic dynamic load rating (C10, for 106 revolutions) of 35 kN. If the equivalent radial load on the bearing is 45 kN, the expected life (in 106 revolutions) isa)below 0.5b)0.5 to 0.8c)0.8 to 1.0d)above 1.0Correct answer is option 'A'. Can you explain this answer? has been provided alongside types of A self-aligning ball bearing has a basic dynamic load rating (C10, for 106 revolutions) of 35 kN. If the equivalent radial load on the bearing is 45 kN, the expected life (in 106 revolutions) isa)below 0.5b)0.5 to 0.8c)0.8 to 1.0d)above 1.0Correct answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
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