228 Machine Drawing
dharm
d:\N-Design\Des15-1.pm5
than the hole and still be within the prescribed tolerances. It results in a clearance fit, when
shaft diameter is 29.95 and hole diameter is 30.05 (+ 0.10 mm) and interference fit, when shaft
diameter is 30.00 and hole diameter 29.95 (– 0.05 mm).
Maximum size of shaft
Shaft tolerance
Max. clearance
Min. clearance (Allowance)
Min dia. of shaft
f29.90
f29.85
f29.95 Min. size of hole =
basic size
f30.00
Hole tolerance
Max. dia of hole
Fig. 15.10 Clearance fit
Max. size of shaft
Shaft tolerance
Max. clearance
Max. interference (Allowance)
Min. dia. of shaft
f30.00
f29.95
f29.95 Min. size of hole =
basic size
f30.05
Hole tolerance
Max. dia. of hole
Fig. 15.11 Transition fit