Determination of the local tooth-root stres in

accordance to ISO 6336/3 with method C


Nominal tangential load Ft=N

Facewidth at the root circle b=mm

Normal module mn=mm

Addendum modification x=mm

k*mn=mm

Radius of root fillet =mm

Number of teeth z=

Residual fillet undercut Spr=

Normal pressure angle =degrees

Helix angle =degrees

Form-factor helix angle =degrees


Transverse contact ratio =

Overlap ratio =


Application factor KA=

Dynamic factor KV=

Face load factor for tooth-root stress =

Transverse load factor for tooth-root stress =


Stress correction factor YST=

Life factor YNT=stopinj

Relative surface factor YR rel T=

Size factor Yx=


Minimum required safety factor for tooth-root stress SFmin=

Bending stress limit value (material) =N/mm2


Vrnitev v poročilo


Mentor : Janez Krek, univ.dipl.ing

Student: Matjaž Leben