308 bearing dimensions & suffix variants

308 dimensions and recorded technical data

The recorded 308 base designation measures 40×90×23 mm (inside diameter d × outside diameter D × width B). This answer uses unsuffixed records from SKF. It does not assign the same dimensions or operating ratings to every suffix.

The numeric series boundary is preserved: a longer number is not included merely because its first digits match. 21 recorded variants are listed. A dash means the value is missing, not zero.

No recorded variant matches these filters. Clear a filter to see other records; no substitute has been inferred.

How to compare these values

• Use the displayed dimension names and original symbols. Housing length L, height H2 and flange width are not bearing outside diameter D. A catalogue width with an unverified symbol must not be assumed to be inner-ring width B or assembly width T. Open the product record for mounting dimensions and geometry.
• Inch values are calculated from the recorded millimetres using 25.4 mm per inch, rounded to six decimal places. They do not change a metric bearing into an inch-series bearing. Gram values are converted from the recorded mass in kilograms.
• C and C0 describe different rating conditions. They are not a single safe working-load limit and cannot replace an application load calculation.
• Reference and limiting speeds are separate catalogue values. The source grease/oil context is shown where recorded. Lubricant, seals, loads, fit, clearance and cooling affect the usable operating speed.
• A common base number does not prove equivalent seals, clearance, precision, material or interchangeability. Open the full designation for these fields.