Description
Product Description
KR52 cam follower needle bearing
EP-KR52 stud type cam follower bearing with 52 mm outside diameter, M20 x 1.5 metric stud thread and CF20-1 cross-reference designation.
EP-KR52 is the larger member of the M20 x 1.5 pair, with a 52 mm outside diameter and 24 mm roller width. Its CF20-1 reference should be checked against the actual D measurement because KR47 shares the same thread and axial dimensions.
The 66.1 mm B1 maximum length and 40.5 mm B2 value mirror KR47, while the mass increases to 461 g. A buyer working from a machine drawing therefore needs the outer-ring diameter, not just the mounting length, to identify this row.
EP-KR52 is listed with D = 52 mm, C = 24 mm, stud diameter 20 mm and M20 x 1.5 thread. The legacy WERB references shown for this row are NAKD52 and NAKD52V.
Key Specifications
EP-KR52 uses the M20 x 1.5 stud interface shown above. Its C and C0 entries remain in the rating table without an added load unit because that unit is not printed in the project size table.
Full Dimension Table
Use the drawing for EP-KR52 to locate D, C, the stud diameter, thread and axial lengths before measuring the removed part. Those interfaces are the primary replacement checks; the cross-reference code should agree with the dimensions rather than override them.
The running-surface note for EP-KR52 allows cylindrical or spherical execution depending on design. Confirm which surface profile the machine requires before choosing between the KR and KRV routes.
| Model | D* (mm) | C (mm) | d1 stud (mm) | Thread | G1 (mm) | B max (mm) | B1 max (mm) | B2 (mm) | B3 (mm) | C1 (mm) | rs min (mm) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| EP-KR52 | 52 | 24 | 20 | M20 x 1.5 | 21 | 25.6 | 66.1 | 40.5 | 9 | 0.8 | 1.0 |
Rating and Cross-Reference Data
| Model | Eccentric e (mm)* | Dynamic C** | Static C0** | Limit speed (rpm) | Mass (g) | WERB old | WERB V old | IKO reference |
|---|---|---|---|---|---|---|---|---|
| EP-KR52 | 0.35 | 1630 | 1690 | 7000 | 461 | NAKD52 | NAKD52V | CF20-1 |
Eccentric value e = 0.35 mm belongs to the related KRE/KRVE execution for EP-KR52. The C/C0 columns are reproduced without a unit because none is printed in the table; confirm the unit convention before calculation.
Selection and Replacement Notes
Use EP-KR52 and CF20-1 to locate the candidate row, then verify the dimensions that matter on this machine. For this size, thread M20 x 1.5, roller diameter and roller width should agree with the removed follower or drawing before running-surface and lubrication details are reviewed.
Inspect the contact band while EP-KR52 is still in the mechanism if access allows. A centred, even band supports the size check; edge polishing or grooving is a reason to examine the rail, bracket and stud alignment instead of assuming a new follower alone will resolve the wear.
Fifty-Two-Millimetre Running Diameter on the M20 Stud
Confirm KR52 by measuring 52 mm across the roller, 24 mm across C and M20 x 1.5 at the stud. Those three dimensions form a practical identification set. The matching axial dimensions with KR47 explain why an assembly drawing that omits D can still leave two plausible candidates.
The cross-reference line lists CF20-1 for KR52. If only “CF20” is readable on an old record, do not infer the suffix from memory; use the 52 mm diameter to decide whether this row or KR47 is the better candidate. This is particularly important on repaired equipment with mixed parts documentation.
A 7,000 rpm limit-speed entry and e = 0.35 mm are printed for this size family. The eccentric value belongs to the KRE/KRVE execution, not automatically to a standard KR52 installation. Record whether the mounting bracket provides eccentric adjustment before selecting that variant.
For service inspection, note the track edge condition and whether the full 24 mm roller width is supported. Chipping or localized polishing at one edge can indicate that the track width, alignment or bracket stiffness deserves correction before a new follower is fitted.
Applications for EP-KR52
Conveyor & material handling
Track-guided carriers, transfer stations and repeated material movement with accessible rail inspection.
Printing & packaging machinery
Cam-driven timing, folding, registration and transfer functions with medium-size follower envelopes.
Machine tools & production equipment
Indexing, guide and fixture mechanisms where rigid stud support and a clean contact band are important.
Indexing tables & cam drives
Repeated cam contact in machinery that cycles between defined positions.
Automation transfer systems
Larger transfer and fixture mechanisms that use stud-mounted rollers on a track.
General industrial track rollers
Rail-following mechanisms where D, C, thread and outer-surface profile are checked from a drawing or removed part.
EP-KR52 is relevant to larger mid-range cam and track mechanisms only when the 52 mm outer diameter is confirmed. The shared M20 stud with KR47 means application history alone cannot identify the correct size.
Related Products and Nearby Sizes
Compare EP-KR52 first with EP-KR47 because both use M20 x 1.5 and C = 24 mm. EP-KR62 then shows the next major step, moving to an M24 stud and a 62 mm running diameter.
EP-KR47 Cam Follower Bearing | CF20 Cross Reference
EP-KR47 stud type cam follower bearing with 47 mm outside diameter, M20 x 1.5 metric stud thread and CF20 cross-reference designation.
View specificationsEP-KR52 Stud Type Track Roller | CF20-1 Cross Reference
EP-KR52 stud type cam follower bearing with 52 mm outside diameter, M20 x 1.5 metric stud thread and CF20-1 cross-reference designation.
View specificationsEP-KR62 Cam Follower Bearing | CF24 Needle Roller
EP-KR62 stud type cam follower bearing with 62 mm outside diameter, M24 x 1.5 metric stud thread and CF24 cross-reference designation.
View specificationsFAQ
What IKO reference is shown for EP-KR52?
The cross-reference table shows CF20-1 on the same size row as EP-KR52. Use that designation as a cross-reference search aid and verify D, C, stud thread, running-surface profile and any suffix-specific execution before replacement.
What thread does EP-KR52 use?
The listed stud thread for EP-KR52 is M20 x 1.5.
What is the related KRV or eccentric designation?
The paired KRV designation is EP-KRV52. If the machine is designed for eccentric adjustment, the naming convention for the corresponding eccentric executions is EP-KRE52 / EP-KRVE52; the table lists e = 0.35 mm for the size row.
What information should I send for a quote?
An EP-KR52 request should include CF20-1 if visible, 52 mm D, 24 mm C, M20 x 1.5 thread, quantity, track width and any signs of eccentric adjustment. Add a close photo if the old suffix cannot be read.
Get a Quote for EP-KR52
For EP-KR52, confirm the 52 mm roller diameter even when the M20 x 1.5 thread has already been measured. That detail distinguishes it from EP-KR47 and helps keep the replacement review tied to the real track geometry.
