robert wrote:........The cylinder is heated to the temperature it is designed to operate at, and the mill is kept at the temperature it is designed to operate at - both for the same reason......
If you heat the cylinder you would have to heat the piston, micrometer, and bore guage to exactly the same temperature
all the while it is being machined for correct piston fit. Don't think you want to be wearing oven mitts around operating machinery.
I understand your point about the piston, but the part about the measuring tools is obtuse.
To obtain accurate measurements everything involved has to be the same temperature, otherwise the dimension measured would be constantly changing as heat is transfered from one to the other.
