Page 373 - Centrifugal Pumps 2E
P. 373
338 Centrifugal Pumps: Design and Application
Figure 16-1. Shaft section.
Yield strength of 4140 steel is 80,000 psi.
The endurance limit for 4140 steel is 52,500 psi. This limit must be
adjusted to account for the service condition (Shigley).
For 99% reliability use K c = .814. For ground surface finish use K a
= .9. For stress concentration due to locating ring groove radius:
where K t is the stress concentration factor from Peterson.
