What are the three methods used to establish a datum axis for a runout tolerance specification?
What will be an ideal response?
ANS:
The standard specifies three methods used to establish a datum axis for a runout tolerance specification. The methods used to establish a repeatable datum axis are:
1. A single diameter of sufficient length
2. Two coaxial diameters a sufficient distance apart
3. A surface (as a primary datum) and a diameter (as a secondary datum) at right angles
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