Description
EP-KR85 / EP-KRV85 is the EVER POWER designation for the 85 mm nominal outside-diameter size in the KR/KRV stud type track roller family. It uses a M30x1.5 stud, an outer-ring width of 35 mm and a speed reference of 5,000 rpm. This size is a practical screening point for large cam mechanisms, heavy automation and machine-tool support systems.
Technical parameters
| Parameter | Value |
|---|---|
| Outside diameter D* | 85 mm |
| Outer-ring width C | 35 mm |
| D1 | 30 mm |
| Stud thread | M30x1.5 |
| Eccentric reference e | 0.5 mm |
| Basic load rating C* | 2,830 |
| Basic load rating C0* | 3,700 |
| Speed reference | 5,000 rpm |
| Mass | 1740 g |
| IKO reference | CF30-1 |
| WERB KR legacy | NAKD85 |
| WERB KRV legacy | NAKD85V |
Dimensions and mounting interface
EP-KR85 is a dimensional alternative within the M30 group. Because the thread and many stud dimensions are shared with EP-KR80 and EP-KR90, the outside diameter and mass become important identifiers during replacement.
| Dimension | Value |
|---|---|
| G1 | 32 mm |
| B max | 37 mm |
| B1 max | 100 mm |
| B2 | 63 mm |
| B3 | 15 mm |
| C1 | 1 mm |
| rs min | 1 mm |
This M30 configuration should be identified by the complete geometry rather than the thread alone. Check shoulder seating, axial lengths and the 85 mm rolling envelope against the actual machine before replacement.
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.
A centered radial contact path is especially important on this large ring. Check for asymmetric wear and correct any frame or track misalignment before the replacement follower is asked to carry the same duty.
Use the 85 mm outside diameter as a deliberate identification point within the shared M30 family. Measuring before ordering is especially important when old maintenance records list only the stud thread.
Size-specific selection perspective
Where EP-KR85 / EP-KRV85 fits
EP-KR85 / EP-KRV85 is the middle outside-diameter option in the M30×1.5 group. Because several large sizes share the same stud family, the 85 mm rolling diameter becomes a key identification check during maintenance and retrofit work. Measure the existing outer ring and confirm the available radial clearance to guards, plates and adjacent mechanisms before ordering. In heavy automation or machine-tool support systems, inspect the track for a centered contact band and check that the mounting surface is sufficiently rigid. The goal is to reproduce the real interface and duty, not merely the thread. Include the old marking and a photograph in the RFQ whenever the machine documentation is incomplete or the follower has been replaced previously.
Differentiate this size from the other M30 options by measuring the 85 mm rolling diameter and available radial space. Then assess track support, lubrication and cycle behavior so maintenance identification and engineering selection remain separate steps.
Replacement and cross-reference identification
IKO CF30-1 and WERB NAKD85 are useful identifiers for this nominal size. The KRV-family legacy row uses NAKD85V. 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-KR85 | CF30-1 | NAKD85 | Standard KR-family reference; confirm ordered outer-surface and lubrication details. |
| EP-KRV85 | CF30-1 | NAKD85V | KRV-family reference; confirm sealing/guide configuration for the order. |
| EP-KRE85 / EP-KRVE85 | — | — | Eccentric-family naming when an eccentric arrangement is required; confirm e and the complete interface. |
Selection and installation checks
Confirm D* 85 mm, C 35 mm, M30x1.5 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-KR85 / EP-KRV85 is installed.
The speed reference is 5,000 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-KR85 / EP-KRV85 against the real machine interface
Send quantity, existing reference, measured 85 mm ring diameter, M30 mounting stack, track condition and an installation photo. Add cycle, lubrication and contamination details so this size is not confused with the neighboring 80 or 90 mm options.
