Description
EP-KR47 / EP-KRV47 is the EVER POWER designation for the 47 mm nominal outside-diameter size in the KR/KRV stud type track roller family. It uses a M20x1.5 stud, an outer-ring width of 24 mm and a speed reference of 7,000 rpm. This size is a practical screening point for machine-tool cams, ATC mechanisms, packaging equipment and printing machinery.
Technical parameters
| Parameter | Value |
|---|---|
| Outside diameter D* | 47 mm |
| Outer-ring width C | 24 mm |
| D1 | 20 mm |
| Stud thread | M20x1.5 |
| Eccentric reference e | 0.35 mm |
| Basic load rating C* | 1,630 |
| Basic load rating C0* | 1,690 |
| Speed reference | 7,000 rpm |
| Mass | 386 g |
| IKO reference | CF20 |
| WERB KR legacy | NAKD47 |
| WERB KRV legacy | NAKD47V |
Dimensions and mounting interface
This is the reference size used in the product-detail planning example. The 47 mm outside diameter, 24 mm outer-ring width and 40.5 mm B2 dimension make the surrounding cam/track and mounting depth especially important during replacement.
| Dimension | Value |
|---|---|
| G1 | 21 mm |
| B max | 25.6 mm |
| B1 max | 66.1 mm |
| B2 | 40.5 mm |
| B3 | 9 mm |
| C1 | 0.8 mm |
| rs min | 1 mm |
The M20 stud allows direct installation into a substantial support, but the 47 mm ring must land on the correct track centerline. Compare B, B1 and B2 with the machine drawing and verify wrench access before installation.
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.
For ATC and cam mechanisms, direct the reaction through the radial track contact and keep the outer ring centered. Do not rely on the follower as the machine’s primary axial guide unless the complete mechanism has been reviewed for that duty.
For ATC work, record the follower position at the load-changing points of the cam. The same 47 mm size can experience very different contact patterns depending on the mechanism geometry and timing.
Size-specific selection perspective
Where EP-KR47 / EP-KRV47 fits
EP-KR47 / EP-KRV47 is the reference size highlighted in the product-detail plan and sits in a practical overlap between packaging machinery and rigidity-oriented machine-tool or ATC mechanisms. Its M20×1.5 stud and 24 mm outer-ring width make mounting depth and track width important checks. In an automatic tool changer, the follower may experience repeated indexing and localized cam contact rather than simple continuous rotation. In printing or packaging service, cycle rate and contamination may dominate instead. For either case, measure the full B/B1/B2 relationship and inspect the contact band on the existing track. That evidence gives a much safer replacement decision than matching the CF or NAKD reference alone.
For the 47 mm M20 size, compare the complete B/B1/B2 geometry with the cam or ATC drawing before looking at operating duty. Once fit is established, review indexing frequency, contact band, lubrication and support rigidity for the actual machine.
Replacement and cross-reference identification
IKO CF20 and WERB NAKD47 are useful identifiers for this nominal size. The KRV-family legacy row uses NAKD47V. 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-KR47 | CF20 | NAKD47 | Standard KR-family reference; confirm ordered outer-surface and lubrication details. |
| EP-KRV47 | CF20 | NAKD47V | KRV-family reference; confirm sealing/guide configuration for the order. |
| EP-KRE47 / EP-KRVE47 | — | — | Eccentric-family naming when an eccentric arrangement is required; confirm e and the complete interface. |
Selection and installation checks
Confirm D* 47 mm, C 24 mm, M20x1.5 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-KR47 / EP-KRV47 is installed.
The speed reference is 7,000 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-KR47 / EP-KRV47 against the real machine interface
For EP-KR47 / EP-KRV47, include the existing CF/NAKD or EP marking, quantity, M20×1.5 engagement, B/B1/B2 fit, track width and machine function. An ATC or cam drawing plus cycle information makes replacement review much more reliable.
