Question

The rectangular hole is to be checked by gauge. The limits of size for the width of hole are ${50}_{-0.00}^{+0.04}mm$ and for the breadth area ${70}_{-0.00}^{+0.05}mm$. What will be limit of size of ‘NOT GO Gauge’ for 50 mm and 70 mm? Taking gauge maker's tolerance to be 10% of the work tolerance.

Answer 1

The ‘Not Go Gauge’ will correspond to the minimum metal condition of hole i.e high limits of dimensions

$\therefore$ Basic size of ‘Not Go Gauge’ for 50 mm dimension

$=50.04mm$

For 70 mm dimension = 70.05 mm

Tolerance on width of hole = 0.04 mm

Tolerance on bredth of hole = 0.05 mm

Gauge marker’s tolerance (10%)

For bredth of hole = 0.005 mm

For width of hole = 0.004 mm

Limits of size of ‘Not Go Gauge’ for 50 mm dimensions are${50}_{-0.0006}^{+0.004}mm$

For 70 mm dimension =

${70.05}_{-0.000}^{+0.005}mm$