* CC-1S0355-DS-30203 revA '?) CommunityCAD Size datasheet - 30203
ISO 355 30203 tapered roller bearing
Size datasheet: this bearing's values with their levels, conventions and sources.
For 17 mm shafts, combined radial and axial loads
Part key iso355-30203
Files 1 STEP AP214 (simplified), cone and cup
30203, front view, 1:1 30203, view from above, 0.5:1 Sym. Dimension Value Level d Bore (cone) 17 L1- 4 D Outside diameter (cup) 40 L1-4 T Total width 13.25 1-4 B Cone width 12 La - 4 c Cup width 11 Lilo & di Cone back rib diameter (=) 29 refx lo: 1 a Cup half angle, from Y 12.95% lo -1 ri Cone back face corner r_s min >1 L1 - 3 r3 Cup back face corner r_s min >1 L1 - 3
Modeled value: nominal, else the midpoint of min-max. =: only that limit is given. * amber: one source (LO). c: a source value was corrected. Level - independent sources.
ISO 355 (edition not printed by the sources) Page 1/2 Tapered roller bearing - 30203 - Dimensions in mm - CC-BY 4.0, IronPixel Labs LLC spec c964ffabe3a887708eb3e6e0cal8e3b2147b3b9c
Modeled from cited sources; not certified. Found an error? Use the feedback section on the part page.
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CC-1S0355-DS-30203 revA Size datasheet - 30203
'?) CommunityCAD
Conventions
e Cup: The cup bore is a straight cone at the half angle a, widest at the cup's front face, where the wall is H/8 of the radial section H = (D - d)/2.
« Cone ribs and raceway: A back rib out to d1 over B/8; the raceway parallel to the cup bore, H/8 below d1/2 at the back rib; a front rib H/16 high over the last B/8.
« Corners: Back face corners are quarter-rounds of r1 (cone) and r3 (cup) at r_s min; the front corners and the rib joins are sharp. The shape isn't specified.
* No rollers or cage: Cone and cup are two separate solids that don't touch; the band between the raceways is empty. Rollers and cage are not modeled.
« Values: d, D, T, B and C at their nominals; d1 at SKF's approximate value (one source); a from the makers' axial load factor Y, a = arccot(Y / 0.4); rl and r3 at r_s min.
* Markings and grades: No markings. Tolerance class, clearance and lubricant are not geometry: one model per bearing.
Sources
Source Publisher Retrieved sha256
nsk-tapered NSK 2026-10-29 3#21460e266e ntn-bearingfinder-tapered NTN Americas 2026-10-29 a07ce30d0d90
timken-tapered The Timken Company 2026-10-29 949029dc7a34
skf-17000-tapered SKF 2026-10-29 65e0919bee24 (kept outside the repo) pule-iso355-cup-angle CommunityCAD 2026-10-30 8352cObbeca3
The whole series (verification map, corrections, drawings): CC-ISO355-Ds.
ISO 355 (edition not printed by the sources) Page 2/2 Tapered roller bearing - 30203 - Dimensions in mm - CC-BY 4.0, IronPixel Labs LLC spec c964ffabe3a887708eb3e6e0cal8e3b2147b3b9c
Modeled from cited sources; not certified. Found an error? Use the feedback section on the part page.