At a glance
CCK
Combines a CC internal-design designation with a K tapered-bore suffix where that naming system applies.
Use when the specified series, internal design, cage and tapered-seat mounting match the machine requirement.
EK
Combines an E internal-design designation with K in applicable series.
Use when that exact E-design product's ratings, cage and mounting requirements satisfy the replacement check.
Key differences
Typical design distinctions. The complete designation and current product specification take precedence.
Swipe the table horizontally to see both options →
| What to compare | CCK | EK |
|---|---|---|
| Code scope | Brand- and series-specific CC design | Brand- and series-specific E design |
| K suffix | Commonly a 1:12 tapered bore; confirm | Commonly a 1:12 tapered bore; confirm |
| Internal construction | Decode CC using the product catalogue | Decode E using the product catalogue |
| Load and speed | Read the actual C, C0 and speeds | Read the actual C, C0 and speeds |
| Mounting | Check sleeve or tapered shaft seat | Check sleeve or tapered shaft seat |
| Replacement | Match bore taper, width, clearance and cage | Match bore taper, width, clearance and cage |
Before you choose
- K30, where specified, is a different bore taper and must not be treated as K.
- E does not have one universal meaning across all brands.
- Drive-up on the taper changes internal clearance and must follow the mounting procedure.
Check the actual model
Search a full designation, inspect its technical data, then compare candidate records. Similar names or dimensions do not guarantee interchangeability.
Filters show recorded catalogue attributes. Open each candidate to confirm its exact specification.
A few things worth clarifying
Does EK automatically carry more load than CCK?
No universal ranking applies across sizes and brands. Compare the exact product ratings.
Does a matching tapered bore ensure interchangeability?
No. Sleeve, shoulders, clearance, cage and lubrication details still need checking.
Reference basis & limits
- SKF — Spherical roller bearings, publication 18406
Independent explanatory content; not a manufacturer endorsement or approval of a replacement. Verify current product data, fits, lubrication and operating conditions before applying a comparison.