Disc Spring Forces and Stresses Machinery's Handbook, 31st Edition
355
6000
3
2
5500
1
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
0
0.01 0.02
0.04 0.05 0.06 0.07
0.09 0.10
0
0.03
0.08
Deflection (inch)
Fig. 7. Force-Deflection Relationships (80-36-3.6 Disc Springs) 1 - Theoretical Force Calculated by Equation (4) 2 - Theoretical Force Calculated by Equation (10) 3 - Measured Force
The actual outside diameter D a of a disc spring contact circle is smaller than the nominal outside diameter D due to cone angle α and corner radius r , as shown in Fig. 8. Diameter D a cannot be measured, but can be calculated by Equation (9) developed by Dr. Isacov.
D / 2
t
r
r
h
D a / 2
D / 2
t
r
r
a
b
D a / 2
Fig. 8. Conventional Shape of Disc Spring
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