DIN5480 Female Involute Spline, W28x1.25x21x8H 2

[lch0712]

Hello,
I'm looking for the real data of the female involute spline, W28x1.25x21x8H DIN5480. I know module is 1.25, pressure angle is 30 degree and number of teeth is 21, and I know OD is 28mm but want to know the real OD dimension with the tolerance. I know 8H is the tolerance spec but I don't know it is related with OD dimension or other dimension.
I'm looking forward to receiving any advice from you, experts...

Thanks,
Chang Lee

 

[gearcutter]

 

[gearguru]

lch0712,

The spline specification as you entered it (W28x1.25x21x8H DIN5480) is not accurate.
"W" there means "Welle" = shaft, but "8H" is a tolerance for the internal spline; external spline (shaft) tolerance would be 8h.
The internal splines description is preceded with "N" = "Nabe" = Hub

gearcutter's spreadsheet calculation is perfect.