Tolerance grades 4567 8 9 | 10 | 11 | 12 | 13
This chart may be
used as a general
guide to determine the
machining processes
that will, under normal
conditions, produce
work within the
tolerance grades
indicated.
Machining
operation
Lapping & honing
Cylindrical grinding
Surface grinding
Diamond turning
Diamond boring
Broaching
Reaming
Turning
Boring
Milling
Planing & shaping
Drilling
The machine shop receives a contract for a 10-inch square crankcase with a 2-inch nominal size
hole that must be drilled. According to the table and chart, what is the lowest standard tolerance,
in thousandths of an inch, for this operation?
A.0.3
B. 1.0
C. 3.0
D. 4.5