PRECISION MEASURING AND GAGING - OD1642 - LESSON 1/TASK 2
(i) Circular Thickness (CT): (1) One-half of the circular pitch.
(2) The length of the arc between the two sides of a gear tooth on the pitch
circle.
(j) Clearance (CL): The space between the top of the tooth of one
gear and the bottom of the tooth of the mating gear.
(k) Dedendum (DED): (1) The depth of the tooth inside of the pitch
circle.
(2) The radial distance between the root circle and the pitch
circle.
(l) Whole Depth (WD): The radial depth between the circle that
bounds the top of the gear teeth and that which bounds the bottom.
FIGURE 52.
GEAR TERMINOLOGY.
(m) Working Depth (WKD): (1) The whole depth minus the clearance.
(2) The depth of the engagement of the two mating gears; the sum of their
addendums.
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