How to calculate centre distance of spur gears?
How to calculate centre distance of spur gears?
(OP)
Hi everybody,
I have the following gear application:
1)Pinion data
Module = 3.5
Z1=14
Pressure angle = 20°
x1(Addendum correction factor)= 0.228
Diametral pitch = 49 mm
2)Gearwheel data
Module = 3.5
Z2=286
Pressure angle = 20°
x2(Addendum correction factor)= 0
Diametral pitch = 1001 mm
I need to calculate the distance between axis to complete my project. Can Somebody give me the formulas to do it (or bibliography to search)?
Thank you in advance,
Carlos
I have the following gear application:
1)Pinion data
Module = 3.5
Z1=14
Pressure angle = 20°
x1(Addendum correction factor)= 0.228
Diametral pitch = 49 mm
2)Gearwheel data
Module = 3.5
Z2=286
Pressure angle = 20°
x2(Addendum correction factor)= 0
Diametral pitch = 1001 mm
I need to calculate the distance between axis to complete my project. Can Somebody give me the formulas to do it (or bibliography to search)?
Thank you in advance,
Carlos





RE: How to calculate centre distance of spur gears?
RE: How to calculate centre distance of spur gears?
(Z1+z2/(pd*cos(y)*2)
where z1 and z2 are no. of teeth
pd is diametral pitch
cos(y) is cosine of helix angle.
Ravi
http://www.gearsandbearings.com
RE: How to calculate centre distance of spur gears?
RE: How to calculate centre distance of spur gears?
RE: How to calculate centre distance of spur gears?
The " Diametral Pitch" mentioned is actually the Standard pitch Diameter. DP is used in Imperial Unit Gears.
RE: How to calculate centre distance of spur gears?
RE: How to calculate centre distance of spur gears?
would be 1/2 the pitch diameters
plus .228 x 3.5
i.e. (pd1 + pd2)/2 plus xm x module.
or (286 + 14)x 3.5/2 = 525mm
plus .228 x 3.5 = plus = .798
yields 525.798mm and
has an operating pressure angle
of 21.1234
You can start out with the 21.1234
pressure angle and see if the other
formulas work.