Calculation of load capacity of spur and helical gears — Part 1: Basic principles, introduction and general influence factors. Edition 2, September 2006, corrected March 2007. Section 7.3.1 discusses loaded contact assessment; §7.4.2, equation (38), printed p. 41, defines the contact face-load factor as maximum line-load intensity divided by mean intensity. This is the cited historical edition; the publisher records its replacement by the 2019 edition.
New to topics? Read the docs here!