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Spur Gear Calculations And Formulas Diametral pitc h
Dedendum
Diametral pit ch
Working Depth
Diametral pitc h
Whole Depth
Diametral pitc h
Clearance
Diametral pitc h
Clearance
C.D. between both gears Operating Diametral Pitch
Number of teeth in each Normal diametral pitch
Center Distance
Number of teeth in both gears Operating diametral pitch
Operating Center Distance
Divide 2.157 (or 2.25) by the diametral pitch Divide .157 (or .250) by the diametral pitch Divide thickness of tooth at the pitchline by 10 Add the number of teeth in both gears and divide by 2 then divide by the center distance Add the number of teeth in both gears and divide by 2 then divide by the normal diametral pitch
Add the number of teeth in both gears and divide by 2 then divide by the operating diametral pitch
Number of teeth in both gears Pitch diameter
Base Diameter
Divide 1.157 (or 1.25) by the diametral pitch Divide 2 by the diametral pitch
Multiply the pitch diameter by the cosine of the pressure angle
Pressure angle Base diameter
Pressure Angle
Divide the base diameter by the pitch diameter
b = 1.157 / Pd hk = 2 / P d ht = 2.157 / Pd c = .157 / Pd c = t / 10
PdO = ((n1 + n2)/2) / C
C = ((n1 + n2)/2) / P nd
Co = ((n1 + n2)/2) / Pod
Db = PD x (cos PA)
cosPA = Db / D
Pitch diameter Base pitch Pressure Angle
Diametral pitc h Diametral pitc h
Base Pitch
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Divide Pi by the diametral pitch, then divide by the base pitch
Pressure angle
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Divide the diametral pitch by Pi, then multiply by the cosine of the pressure angle
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| QUOTE REQUEST |
cos PA = (3.1416 / Pd) / Pb
Pb = (Pd / 3.1416) x (cos PA)
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