C39-1060-MB bearing: complete specifications & equivalents
The C39-1060-MB is a ISO 15 radial bearing sized 1060 x 1400 x 250 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 1060 mm |
| Outer diameter D | 1400 mm |
| Width B | 250 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 11000 kN |
| Basic static load rating C0 | 26000 kN |
| Fatigue load limit Pu | 1430 kN |
| Reference speed (thermal) | 260 rpm |
| Limiting speed (mechanical) | 360 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1120000 g |
| Manufacturer designation | C 39/1060 MB |
| 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 & C3900-series range
| Bore d | 41.732 in |
|---|---|
| Outer diameter D | 55.118 in |
| Width B | 9.843 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 170 mm |
| Smallest bore in C3900-series | 360 mm |
| Largest outer diameter in C3900-series | 2180 mm |
| Width range across C3900-series | 90–355 mm |
| Bore position in C3900-series (smallest first) | 12 of 15 |
| Bore above smallest C3900-series size | 700 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| C39-1060-KMB | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 1060×1400×250 mm ISO 15 envelope and equivalent catalogue C/C0; C 39/1060 KMB is the 1:12 tapered-bore K MB inner-ring-guided brass-caged execution of this size — boundary dimensions interchangeable, only mounting and cage execution differ. |
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 C39-1060-MB model number is decoded
The CARB bearing C 39/1060 MB combines the self-aligning behaviour of a spherical roller bearing with the axial freedom of a cylindrical bearing in one 1060 mm bore, 1400 mm outside diameter, 250 mm wide unit rated 11000 kN dynamic. The designation C 39/1060 MB separates into C (CARB), 39 (dimension series), 1060 mm (slash-size) (1060 mm bore — bore 1060 mm is written directly after the slash) and MB (cylindrical bore for direct shaft fitting, machined inner-ring-guided brass cage (MB)); envelope 1060×1400×250 mm follows the ISO 15 plan. The cylindrical 1060 mm bore mounts directly on a machined seat; the outer ring takes a loose housing fit so the bearing can float axially. The same size is listed in both bore executions, and the boundary dimensions 1060×1400×250 mm are identical — only the mounting method changes. Speed planning separates the 260 r/min thermal reference from the 360 r/min mechanical limiting speed. The full-complement V executions carry more load but list no thermal reference speed; the brass-caged executions run faster and cooler at light load. After fitting, confirm the inner ring can be pushed axially by hand through the catalogue displacement range; a ring that will not slide means the position is locked and will preload in service.
Typical equipment & failure modes
Common applications
- continuous-caster guide rolls and slab-caster segments under heat growth
- vibrating screen exciters fitted with the VE240 tolerance execution
- 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
Known failure patterns
- raceway spalling once the catalogue L10 life is exceeded or after sustained overload
- thermal preloading when a shaft is located at both ends and growth has nowhere to go
- brass cage pocket wear under marginal lubrication in the large-bore M/MB executions
- condensation pitting in machines that run intermittently in humid environments
- abrasive paste forming as dust bypasses the housing seals into the open washer set
Selection pitfalls — read before you substitute
- At 1060 mm bore the 1120 kg mass and 250 mm width make seating geometry dominant: sphered-washer seats and oil flow must be verified in place, not just on the drawing.
- Never use C 39/1060 MB 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.
- Tapered-bore K executions mount on adapter sleeves (1:12) and K30 on withdrawal sleeves (1:30) — the 1060 mm bore changes the sleeve family, and the drive-up procedure differs accordingly.
- Do not block the axial displacement in the drawing: housing covers, labyrinth rings and snap rings must leave the catalogue float (s) free, or the bearing silently becomes a poorly located fixed bearing.
- Envelope-identical spherical roller bearings (same ISO 15 d×D×B) are not drop-in equivalents — they locate the shaft axially, while C 39/1060 MB must float; the two are designed to be used as a pair.
- The 11000/26000 kN ratings and 1120000 g mass are SKF catalogue values transcribed from ch. 10.1 of PUB BU/P1 17000 (PDF table page 868); 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 is the difference between V and TN9 CARB executions?
V is the full-complement execution with no cage — more rollers, higher C (11000 kN here) but a lower speed ceiling and no thermal reference speed. TN9 is the glass-fibre PA66 caged execution, faster and quieter at somewhat lower load. C 39/1060 MB is the cylindrical bore for direct shaft fitting, machined inner-ring-guided brass cage (MB).
How is C 39/1060 MB mounted?
Slide or heat (max 120 °C) the bearing onto the 1060 mm seat, give the outer ring a loose housing fit, leave the float travel unobstructed, and never press through the 250 mm roller set.
What are the dimensions and ratings of the C 39/1060 MB?
A C 39/1060 MB measures 1060 mm bore × 1400 mm outside diameter × 250 mm width (41.732 × 55.118 × 9.843 in). From SKF catalogue PUB BU/P1 17000: dynamic C 11000 kN, static C0 26000 kN, fatigue limit Pu 1430 kN, reference speed 260 r/min, limiting speed 360 r/min, mass about 1120000 g.
Can a CARB bearing like C 39/1060 MB locate the shaft axially?
No — that is the defining feature. C 39/1060 MB deliberately allows the inner ring to float axially inside the outer ring while the toroidal rollers self-align. It must be paired with a separate locating bearing (spherical, tapered or angular contact) that takes 100 % of the thrust.
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.