PDN c

60 m

The criterion for turbulence in journal bearings is that Re a 1000. example As an example, consider the following:

Journal diameter D = 5 in (127 mm) Bearing length L = 5 in (127 mm) Radial clearance c = 0.0025 in (0.064 mm) Operating speed N = 5000 rpm

Lubricant viscosity m = 2 X 10-6 lb • s/in2 (14 X 10-3 Pa • s) Lubricant density p = 7.95 X 10-5 lb • s2/in4(8.66 X 10-11 kg • s2/mm4)

Re p

Survival Treasure

Survival Treasure

This is a collection of 3 guides all about survival. Within this collection you find the following titles: Outdoor Survival Skills, Survival Basics and The Wilderness Survival Guide.

Get My Free Ebook


Post a comment