what is TIR???? ..............
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Answer:
hlo
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Explanation:
Total indicator runout, or TIR, is a term often used in manufacturing, especially when dealing with rotating parts. Other names include total indicator reading, or more recently, full indicator movement (FIM). TIR is simply the difference between the maximum and minimum values measured across an entire rotating surface about a reference axis.
When called out on a blueprint, TIR creates a boundary zone in which all points on the specified surface must fall between in order for the part to meet spec. The symbol used is a connected double arrow along with a value referenced against a datum axis. See below for a graphical representation.