After the press has run for some time, the lubricating oil described in Problem 8.19 heats to
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After the press has run for some time, the lubricating oil described in Problem 8.19 heats to 212°F. Compute the Reynolds number for the oil flow at this temperature. Discuss the possible operating difficulty as the oil heats up.
In Problem
The lubrication system for a punch press delivers 1.65 gal/min of a light lubricating oil (see Appendix C) through 5/16-in steel tubes having a wall thickness of 0.049 in. Shortly after the press is started, the oil temperature is 104°F. Compute the Reynolds number for the oil flow.
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