pitch diameter


Also found in: Acronyms.

pitch diameter

[′pich dī‚am·əd·ər]
(design engineering)
The diameter of the pitch circle of a gear.
References in periodicals archive ?
The pitch diameter d was found using (5) from the diametral pitch and the number of gear teeth N.
Variables and Symbols b: Width of a working surface of a grinding wheel, mm [D.sub.c]: Pitch diameter of working face grinding [S.sub.l]: Longitudinal feed per revolution of the disk, mm/v [D.sub.cj]: Pitch diameter of j conventional line [V.sub.d]: Speed of the longitudinal feed of the machine table m/min [V.sub.k]: Rational rate of the grinding disk, v/s [D.sub.kp]: Outer diameter of the working face grinding [F.sub.j:] Area of j conventional disk of operating face grinding [beta]: Correction for symmetric array of the curve, radius disposal of grains top on the working wheel layer [gamma]: Half of the probable angle value of cutting grains apex; [omega]: Specific capacity; mms.
Basically, since wear is proportional to the applied load, the proportionality coefficient can be divided by the nominal friction force F = 29.92 N, calculated from the nominal torque, pitch diameter and friction coefficient, according to the relationship:
To the Editor: A point on the pitch circumference of a pinion rolling inside of an internal gear moves back and forth in a straight line if the pitch diameter of the internal gear is twice that of the pinion.
[pi] (pitch diameter) (engagement length), where pitch diameter is the average of the screw root diameter and the outer diameter (Table 1).
The new standard will establish uniform practices for this important measurement, which is a critical step needed to properly establish pitch diameter of threaded fasteners.
The resulting gearbox modification features custom Power-Core gears with a larger pitch diameter, wider face width and an integral stainless steel shaft that extends on each side of the gear and rotates directly within the load-bearing cover plates.
Do I use the pulley diameter or does a flat belt have a predictable pitch diameter? Does anyone have any good reference material on this subject?
A general guideline for boss design is that the inside diameter - commonly the pitch diameter of the screw - usually depends upon recommendations provided by the screw manufacturer.
PD x RPM Where: OHL = Overhung load, lb HP = Horsepower Fc = Load connection factor (sprocket or synchronous belt = 1.0; machined pinion and gear = 1.25; V-belt = 1.5; flat belt = 2.5) PD = Pitch diameter, in.