Description
Product Description
KR85 KR90 heavy duty cam follower
EP-KR85 / EP-KR90 stud type cam follower bearing with 85 / 90 mm outside diameter, M30 x 1.5 metric stud thread and CF30-1 / CF30-2 cross-reference designation.
EP-KR85 and EP-KR90 share one detail page because their table rows use the same M30 x 1.5 stud, 35 mm roller width and axial dimensions. The outer diameter and mass distinguish the two: 85 versus 90 mm, and 1740 versus 1950 g.
Their IKO references progress from CF30-1 to CF30-2, while the B1 maximum length remains 100 mm for both. This paired presentation lets a buyer compare the two largest rows without hiding the measurements that actually separate them.
EP-KR85 / EP-KR90 share the listed M30 x 1.5 stud thread and 35 mm roller width, with D = 85 / 90 mm separating the two size rows. The legacy WERB references shown for this row are NAKD85 / NAKD90 and NAKD85V / NAKD90V.
Key Specifications
The EP-KR85 / EP-KR90 rows share the M30 x 1.5 stud platform. C and C0 remain unitless in the rating table because the project size table does not print a load-rating unit for those columns.
Full Dimension Table
Use the drawing for EP-KR85 / EP-KR90 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-KR85 / EP-KR90 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-KR85 | 85 | 35 | 30 | M30 x 1.5 | 32 | 37 | 100 | 63 | 15 | 1.0 | 1.0 |
| EP-KR90 | 90 | 35 | 30 | M30 x 1.5 | 32 | 37 | 100 | 63 | 15 | 1.0 | 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-KR85 | 0.5 | 2830 | 3700 | 5000 | 1740 | NAKD85 | NAKD85V | CF30-1 |
| EP-KR90 | 0.5 | 2830 | 3700 | 5000 | 1950 | NAKD90 | NAKD90V | CF30-2 |
Eccentric value e = 0.5 / 0.5 mm belongs to the related KRE/KRVE execution for EP-KR85 / EP-KR90. 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-KR85 / EP-KR90 and CF30-1 / CF30-2 to locate the candidate row, then verify the dimensions that matter on this machine. For this size, thread M30 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-KR85 / EP-KR90 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.
Separate the 85 mm and 90 mm Rows Before Ordering
The first decision on this page is whether the machine uses the 85 mm or 90 mm running diameter. Both rows show a 30 mm stud, M30 x 1.5 thread, C = 35 mm, G1 = 32 mm and the same axial envelope. A thread measurement alone cannot choose between them.
CF30-1 corresponds to the KR85 row and CF30-2 to KR90 in the cross-reference table. The mass entries also differ, at 1740 g and 1950 g. If a maintenance record includes only a weight or a partially readable suffix, use that clue to decide which D measurement should be expected and then confirm it physically.
Both rows list 5,000 rpm as limit speed, e = 0.50 mm for the eccentric execution, and the same C/C0 numbers without a printed load unit. The missing unit is deliberately left unresolved here. Before any bearing-life calculation, confirm that convention and collect the machine’s radial load, shock and cycle information.
For the two largest rollers, handling and mounting condition deserve close inspection. Check that the M30 stud is supported squarely, that the nut seats fully, and that the track carries the roller across its intended 35 mm width. Photos taken before removal can preserve signs of edge loading, fretting or track damage.
Applications for EP-KR85 / EP-KR90
Material handling & heavy conveyors
Large track-guided carriers and transfer systems where the follower has to fit a larger stud and roller envelope.
Heavy indexing & cam mechanisms
Industrial indexing mechanisms and cam drives with larger track geometry and mounting interfaces.
Large machine-tool mechanisms
Heavy auxiliary guide or indexing functions where the mounting face and stud support are substantial.
Large packaging & converting equipment
Cam-driven stations using larger followers where track wear and service access need review.
Industrial rail-following systems
General machinery that uses a large stud-mounted roller against a defined track.
Automation & transfer equipment
Larger automated transfer mechanisms when the measured interface and duty suit the selected size.
EP-KR85 / EP-KR90 application review begins by separating the two outside diameters. Heavy conveyors, indexing machinery and large cam tracks can use similar mounting architecture, so the machine category cannot replace an 85 or 90 mm measurement.
Related Products and Nearby Sizes
Compare the EP-KR85 / EP-KR90 pair with EP-KR80 to see the complete M30 x 1.5 group. All three share C = 35 mm; the outer diameter and CF30 suffix progression are the useful separators.
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EP-KR72 stud type cam follower bearing with 72 mm outside diameter, M24 x 1.5 metric stud thread and CF24-1 cross-reference designation.
View specificationsEP-KR80 Heavy Duty Cam Follower | CF30 Cross Reference | M30
EP-KR80 stud type cam follower bearing with 80 mm outside diameter, M30 x 1.5 metric stud thread and CF30 cross-reference designation.
View specificationsEP-KR85 / EP-KR90 Cam Follower | CF30-1 / CF30-2 Heavy Duty
EP-KR85 / EP-KR90 stud type cam follower bearing with 85 / 90 mm outside diameter, M30 x 1.5 metric stud thread and CF30-1 /…
View specificationsFAQ
What IKO reference is shown for EP-KR85 / EP-KR90?
The cross-reference table shows CF30-1 / CF30-2 on the same size row as EP-KR85 / EP-KR90. 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-KR85 / EP-KR90 use?
The listed stud thread for EP-KR85 / EP-KR90 is M30 x 1.5.
What is the related KRV or eccentric designation?
The paired KRV designation is EP-KRV85 / EP-KRV90. If the machine is designed for eccentric adjustment, the naming convention for the corresponding eccentric executions is EP-KRE85 / EP-KRVE85 / EP-KRE90 / EP-KRVE90; the table lists e = 0.5 / 0.5 mm for the size row.
What information should I send for a quote?
For EP-KR85 / EP-KR90, send the CF30-1 or CF30-2 marking if visible, confirm whether D is 85 or 90 mm, record C = 35 mm and M30 x 1.5 thread, then add quantity, track condition and clear mounting photographs.
Get a Quote for EP-KR85 / EP-KR90
For the EP-KR85 / EP-KR90 page, state the measured outside diameter first so the quote is tied to the correct row. The shared M30 thread and 35 mm width do not distinguish these two largest sizes.
