M_external = dref * cos(α) / cos(α_M) + dm
If you need to calculate dimensions for a specific profile, tell me the , module , or number of teeth , and I will generate the exact geometric data you need. Share public link
Go to www.beuth.de . Search for "DIN 5480-1:2006-03" and "DIN 5480-2:2006-03".
: These are adjusted based on the profile shift to maintain a standardized clearance ( ), typically Addendum ( ) and Dedendum ( ) : Standard values are often for the addendum and for the dedendum in hobbed splines. Verification and Measurement Din 5480-1 | PDF - Scribd
Always check the status of the standard. The current active version of the base standard is . However, this part was updated in 2025. DIN 5480-2 has a more recent edition: DIN 5480-2:2015-03 . A draft of DIN 5480-1:2025 was also issued.
Ensure values reflect flank-centered clearance rather than major/minor diameter centering profiles (which belong to older standards like DIN 5482).