Description
EP-KR72 / EP-KRV72 is the EVER POWER designation for the 72 mm nominal outside-diameter size in the KR/KRV stud type track roller family. It uses a M24x1.5 stud, an outer-ring width of 29 mm and a speed reference of 6,500 rpm. This size is a practical screening point for machine tools, ATC mechanisms and robust automation with generous mounting space.
Technical parameters
| Parameter | Value |
|---|---|
| Outside diameter D* | 72 mm |
| Outer-ring width C | 29 mm |
| D1 | 24 mm |
| Stud thread | M24x1.5 |
| Eccentric reference e | 0.4 mm |
| Basic load rating C* | 2,160 |
| Basic load rating C0* | 2,210 |
| Speed reference | 6,500 rpm |
| Mass | 1040 g |
| IKO reference | CF24-1 |
| WERB KR legacy | NAKD72 |
| WERB KRV legacy | NAKD72V |
Dimensions and mounting interface
EP-KR72 keeps the M24×1.5 stud geometry of EP-KR62 but increases the outside diameter and mass. The larger ring changes the contact path and available clearance, so a thread match alone is not enough.
| Dimension | Value |
|---|---|
| G1 | 25 mm |
| B max | 30.6 mm |
| B1 max | 80.1 mm |
| B2 | 49.5 mm |
| B3 | 11 mm |
| C1 | 0.8 mm |
| rs min | 1 mm |
The M24 stud needs a rigid supporting wall and a clear tightening path. Because the outer ring is larger than the 62 mm option, also confirm that final seating keeps the ring centered on the intended track.
Construction and configuration choices
The family can use a cylindrical or spherical outer surface depending on design. Confirm the mating-track geometry and edge-contact requirement.
When eccentric adjustment is required, use the KRE / KRVE naming as the enquiry reference and confirm the eccentric value and mounting orientation.
If the mechanism needs a particular KRV sealing arrangement, grease specification, clean-production lubricant or washdown resistance, state it as an ordered requirement.
Keep the radial reaction aligned with the 72 mm running surface and verify track support across the contact width. Axial motion should be controlled by the surrounding machine guidance, not by incidental rubbing at the ring edge.
When replacing a 72 mm follower, compare the cleaned old ring with the track wear pattern before disposal. That pair of observations can reveal whether alignment should be corrected during maintenance.
Size-specific selection perspective
Where EP-KR72 / EP-KRV72 fits
The 72 mm follower remains in the M24×1.5 stud family but adds a larger rolling envelope and more mass than EP-KR62. That makes the outside diameter and machine clearance important identifiers during replacement, even when the thread appears identical. On large ATC or robust automation mechanisms, check the surrounding frame for deflection and confirm that the track width supports the outer ring without forcing contact onto an edge. Maintenance teams should also record how the existing follower is lubricated and whether contamination can reach the rolling interface. Those observations help determine the ordered configuration and prevent a simple code match from overlooking the actual duty environment.
Confirm the 72 mm outside diameter and M24 mounting position against the machine before using a legacy code to select the part. The operating review should then cover track support, structural deflection, contamination and the actual motion profile.
Replacement and cross-reference identification
IKO CF24-1 and WERB NAKD72 are useful identifiers for this nominal size. The KRV-family legacy row uses NAKD72V. Use these references to narrow the search, then verify the physical interface and ordered configuration before treating the parts as interchangeable.
| EP reference | IKO reference | WERB legacy | Replacement note |
|---|---|---|---|
| EP-KR72 | CF24-1 | NAKD72 | Standard KR-family reference; confirm ordered outer-surface and lubrication details. |
| EP-KRV72 | CF24-1 | NAKD72V | KRV-family reference; confirm sealing/guide configuration for the order. |
| EP-KRE72 / EP-KRVE72 | — | — | Eccentric-family naming when an eccentric arrangement is required; confirm e and the complete interface. |
Selection and installation checks
Confirm D* 72 mm, C 29 mm, M24x1.5 thread, B/B1/B2 geometry and the available shoulder/corner clearance.
Inspect the mating track in the context of machine-tool or heavy cam motion. A displaced contact band, ridge or local impact mark can indicate an alignment or track problem that should be corrected before EP-KR72 / EP-KRV72 is installed.
The speed reference is 6,500 rpm. Real operating suitability still depends on load, lubrication, temperature, contamination and cycle pattern.
State KR/KRV/KRE/KRVE preference, outer-surface geometry, lubricant/sealing requirement and any inspection/documentation needs in the RFQ.
Related sizes
Quote EP-KR72 / EP-KRV72 against the real machine interface
For this large M24 size, provide quantity, old code, 72 mm diameter check, shoulder/axial dimensions, track width and a photo showing surrounding clearance. State the machine function, cycle and lubrication condition separately.
