Question 72General Subjects - Assistant Engineer
70% to passA roller bearing has an interference fit with the shaft upon which it is being installed. What thermal method of mounting the bearing would be most appropriate?
AHeating the bearing in an oil-bath bearing heater.
BCooling the bearing with dry ice.
CCooling the shaft with liquid refrigerant.
DHeating the bearing with an oxyacetylene torch.
AI Explanation
The correct answer is A) Heating the bearing in an oil-bath bearing heater. Heating the bearing in an oil-bath bearing heater is the most appropriate thermal method for mounting a roller bearing with an interference fit on a shaft. This approach causes the bearing to expand, allowing it to slide onto the shaft more easily. Cooling the bearing or shaft (options B and C) would actually make the interference fit tighter, making installation more difficult. Heating the bearing with an oxyacetylene torch (option D) could potentially damage the bearing, so this method is not recommended.
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