C4192-K30MB bearing: complete specifications & equivalents
The C4192-K30MB is a ISO 15 radial bearing sized 460 x 760 x 300 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 460 mm |
| Outer diameter D | 760 mm |
| Width B | 300 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 8650 kN |
| Basic static load rating C0 | 15000 kN |
| Fatigue load limit Pu | 1020 kN |
| Reference speed (thermal) | 480 rpm |
| Limiting speed (mechanical) | 630 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 571000 g |
| Manufacturer designation | C 4192 K30MB |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 10.1 CARB toroidal roller bearings |
| Last verified | 2026-09-27 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 10.1 CARB toroidal roller bearings) · extracted 2026-09-27
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 10.1 CARB toroidal roller bearings); SKF® and SKF Explorer® are trademarks of AB SKF, used here for identification only — mpnbase is not an authorized SKF distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at skf.com.
Dimensions in inches & C4100-series range
| Bore d | 18.11 in |
|---|---|
| Outer diameter D | 29.921 in |
| Width B | 11.811 in |
| ISO bore code | 92 |
| Radial section height (D−d)/2 | 150 mm |
| Smallest bore in C4100-series | 100 mm |
| Largest outer diameter in C4100-series | 1090 mm |
| Width range across C4100-series | 65–412 mm |
| Bore position in C4100-series (smallest first) | 10 of 14 |
| Bore above smallest C4100-series size | 360 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| C4192-MB | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 460×760×300 mm ISO 15 envelope and equivalent catalogue C/C0; C 4192 MB is the cylindrical-bore MB inner-ring-guided brass-caged execution of this size — boundary dimensions interchangeable, only mounting and cage execution differ. |
| 24192 | SKF | full Dimensions and internal design equivalent — standard interchange. | Envelope-identical (460×760×300 mm) SKF spherical roller bearing SKF 24192 ECA/W33 with ratings within 10 % — not a drop-in substitute: SKF 24192 ECA/W33 locates the shaft axially while the CARB bearing must float; the two are designed to run as a locating/non-locating pair. |
| 24192-ECAK30-W33 | SKF | full Dimensions and internal design equivalent — standard interchange. | Envelope-identical (460×760×300 mm) SKF spherical roller bearing SKF 24192 ECAK30/W33 with ratings within 10 % — not a drop-in substitute: SKF 24192 ECAK30/W33 locates the shaft axially while the CARB bearing must float; the two are designed to run as a locating/non-locating pair. |
Interchange levels: full standard interchange · partial verify parameters · verify manual confirmation required. Links resolve to the equivalent model's specification page where available.
How the C4192-K30MB model number is decoded
C 4192 K30MB belongs to the CARB family — compact aligning roller bearings: envelope 460×760×300 mm, radial rating 8650/15000 kN C/C0, and no axial-locating function by design. SKF builds the CARB order number from size plus execution: the bare number C 4192 is the brass-caged cylindrical-bore bearing, K (or K30) makes the bore tapered for sleeve mounting, and the cage/seal letters follow — here K30MB. The K30 suffix gives a 1:30 tapered 460 mm bore, mounted on a withdrawal (AH) sleeve so the bearing can be driven up to the specified clearance. The same size is listed in both bore executions, and the boundary dimensions 460×760×300 mm are identical — only the mounting method changes. Float capacity is a selection criterion: the catalogue lists the permissible axial displacement (s) for the 300 mm wide set; size the free-end housing so thermal growth stays within it, not just inside the overall width. Mounting: mount on the withdrawal (AH) sleeve matched to the 1:30 tapered bore, drive up to the catalogue reduction and lock the nut; never press through the 300 mm roller set, and leave the free-end housing shoulder clear so axial float is unrestricted.
Typical equipment & failure modes
Common applications
- long fan and kiln main shafts where the free end must float without thrust load
- heavy industrial gearbox layshafts used as the non-locating position
- winder and reel drums in paper and steel strip plants
- paper machine drying cylinders and calender rolls with long, thermally expanding shafts
Known failure patterns
- roller-end and flange smearing after lubricant starvation at the long roller contacts
- roller skew and cage damage after the bearing is clamped solid between shaft and housing shoulders
- brass cage pocket wear under marginal lubrication in the large-bore M/MB executions
- false brinelling and rust-red witness marks on standby machines under external vibration
- oil starvation at the sliding contact zones of large spherical roller thrust bearings on forced-feed trips
Selection pitfalls — read before you substitute
- Above 200 mm bore these bearings weigh tens of kilograms (571 kg here) — lifting gear and induction heating are mandatory, and a cocked ring scores the toroidal raceway before start-up.
- Tapered-bore K executions mount on adapter sleeves (1:12) and K30 on withdrawal sleeves (1:30) — the 460 mm bore changes the sleeve family, and the drive-up procedure differs accordingly.
- Reference and limiting speeds are different limits: the 480 r/min reference speed is the thermal criterion under load, the limiting value is the mechanical ceiling; observe the reference under load unless the arrangement calculation says otherwise.
- Envelope-identical spherical roller bearings (same ISO 15 d×D×B) are not drop-in equivalents — they locate the shaft axially, while C 4192 K30MB must float; the two are designed to be used as a pair.
- Never use C 4192 K30MB as the locating bearing: it carries no axial load by design — the arrangement needs a separate locating spherical, tapered or angular bearing facing the thrust.
- The 8650/15000 kN ratings and 571000 g mass are SKF catalogue values transcribed from ch. 10.1 of PUB BU/P1 17000 (PDF table page 866); mounting data — axial displacement (s) and seating details — appears in the running text because the structured record carries the boundary envelope only.
Frequently asked questions
What fails first on a misapplied CARB bearing?
Blocking the designed axial float — clamping the free end or locating both shaft ends — turns thermal growth into edge loading and spalls the toroidal raceways. Cage damage and ordinary fatigue follow overload or dry running.
Which dimensions does the C 4192 K30MB have?
A C 4192 K30MB measures 460 mm bore × 760 mm outside diameter × 300 mm width (18.11 × 29.921 × 11.811 in). From SKF catalogue PUB BU/P1 17000: dynamic C 8650 kN, static C0 15000 kN, fatigue limit Pu 1020 kN, reference speed 480 r/min, limiting speed 630 r/min, mass about 571000 g.
What does C 4192 K30MB mean in SKF part numbering?
C marks CARB; 41 the dimension series; the size code gives 460 mm bore; K30MB is the execution (tapered 1:30 bore for withdrawal (AH) sleeve mounting, machined inner-ring-guided brass cage (MB)). The envelope follows ISO 15 and matches spherical roller bearing outlines, but the functions differ.
Why is C 4192 K30MB used opposite a spherical roller bearing?
The spherical bearing locates the shaft and takes thrust; the CARB bearing at the other end self-aligns but floats, absorbing thermal expansion without inducing axial load. The pair is standard on paper machine drying cylinders and long caster rolls.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 10.1 CARB toroidal roller bearings on 2026-09-27. Read our editorial & correction policy.