Description
EP-KR13 / EP-KRV13 is the EVER POWER designation for the 13 mm nominal outside-diameter size in the KR/KRV stud type track roller family. It uses a M5x0.8 stud, an outer-ring width of 9 mm and a speed reference of 29,000 rpm. This size is a practical screening point for wafer handling, IC pick-and-place and very compact automation.
Technical parameters
| Parameter | Value |
|---|---|
| Outside diameter D* | 13 mm |
| Outer-ring width C | 9 mm |
| D1 | 5 mm |
| Stud thread | M5x0.8 |
| Eccentric reference e | 0.25 mm |
| Basic load rating C* | 280 |
| Basic load rating C0* | 180 |
| Speed reference | 29,000 rpm |
| Mass | 16 g |
| IKO reference | CF5 |
| WERB KR legacy | NAKD13 |
| WERB KRV legacy | NAKD13V |
Dimensions and mounting interface
At 13 mm outside diameter, a small error in shoulder position or stud seating is proportionally significant. Measure the surrounding pocket and track rather than selecting by code alone.
| Dimension | Value |
|---|---|
| G1 | 7 mm |
| B max | 10 mm |
| B1 max | 23 mm |
| B2 | 13 mm |
| B3 | — |
| C1 | 0.5 mm |
| rs min | 0.3 mm |
The stud mounting keeps the assembly compact, but the small scale makes seating accuracy important. Confirm the M5 engagement, shoulder location and nearby tool clearance so the follower is not pulled out of alignment as it is tightened.
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.
Use the follower for controlled radial contact with the cam or track. If the mechanism also needs axial guidance, provide a separate guiding arrangement or review the complete assembly rather than assigning that function to this small follower.
For service work on miniature mechanisms, preserve the original track centerline and avoid shifting the running surface while tightening the stud. A before-removal photo is often more useful than a general machine photo.
Size-specific selection perspective
Where EP-KR13 / EP-KRV13 fits
EP-KR13 / EP-KRV13 belongs at the very compact end of the range, so the surrounding mechanism deserves a measurement-led review. In wafer-handling or small pick-and-place equipment, a few millimetres of shoulder position, tool access or track alignment can decide whether the follower runs cleanly. The small envelope also makes contamination control and lubricant choice more visible to the mechanism designer. When replacing an existing part, photograph the mounting face and record the stud engagement as well as the outside diameter. When selecting for a new mechanism, check the actual contact path and acceleration pattern instead of treating the high speed reference as an operating recommendation.
Start with the 13 mm envelope, M5 stud and the exact pocket geometry, then add the real cycle rate and cleanliness requirement. This sequence fits compact precision equipment where a small physical mismatch can be more important than a nominal rating comparison.
Replacement and cross-reference identification
IKO CF5 and WERB NAKD13 are useful identifiers for this nominal size. The KRV-family legacy row uses NAKD13V. 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-KR13 | CF5 | NAKD13 | Standard KR-family reference; confirm ordered outer-surface and lubrication details. |
| EP-KRV13 | CF5 | NAKD13V | KRV-family reference; confirm sealing/guide configuration for the order. |
| EP-KRE13 / EP-KRVE13 | — | — | Eccentric-family naming when an eccentric arrangement is required; confirm e and the complete interface. |
Selection and installation checks
Confirm D* 13 mm, C 9 mm, M5x0.8 thread, B/B1/B2 geometry and the available shoulder/corner clearance.
Inspect the mating track in the context of compact precision motion. A displaced contact band, ridge or local impact mark can indicate an alignment or track problem that should be corrected before EP-KR13 / EP-KRV13 is installed.
The speed reference is 29,000 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-KR13 / EP-KRV13 against the real machine interface
For this compact size, send the old marking, quantity, measured 13 mm envelope, M5 stud details, mounting photo and machine cycle. Add cleanliness or lubricant requirements when the follower works near sensitive electronics or clean production.
