ME 437 – HW #6 Solutions
Problem 6-1
15f6 = 14.973 – 14.984
Min Clearance = 0.016
15H7 = 15.000 – 15.018
Max clearance = 0.045
Problem 6-2
i. Sliding Fit H7/g6
ii. Locational interference fit H7/p6
iii. Locational interference fit H7/p6
iv.
Close running fit H8/f7
v. Locational clearance fit H7/h6
vi.
Locational clearance fit H7/h6
vii.
Loose running fit H11/c11
Problem 6-3
FB= 15-0.05 = 14.95
Gage=14.95
Problem 6-5
For a free running fit: Pmin = 0.05 and Pmax = 0.136, therefore
Pmin = Hmin – Fmax  0.05 = 12 – Fmax  Fmax = 11.950
Pmax = Hmax – Fmin  0.136 = 12.013 - Fmin  Fmin = 11.877
Shaft limits: 11.877 – 11.950
Problem 6-7
Problem 6-9
The primary application of metallic dowel pins is in jigs and fixtures
Limits on Metric Dowel Pin Diameters are:
1.5mm to 3mm + .003 / +.008mm
4mm to 6mm + .004 / +.009mm (this corresponds to m5 limits)
8mm to 10mm + .006 / +.012mm (this corresponds to m5 limits)
12mm to 16mm + .007 / +.013mm
20mm to 25mm + .008 / +0.14mm
Problem 6-10
Here is an example of 12 mm ground shafting. This shaft has 12h6 limits
Problem 7-1