C4044-V bearing: complete specifications & equivalents
The C4044-V is a ISO 15 radial bearing sized 220 x 340 x 118 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 220 mm |
| Outer diameter D | 340 mm |
| Width B | 118 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | none |
| Basic dynamic load rating C | 1930 kN |
| Basic static load rating C0 | 3250 kN |
| Fatigue load limit Pu | 280 kN |
| Limiting speed (mechanical) | 200 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 40000 g |
| Manufacturer designation | C 4044 V |
| 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 & C4000-series range
| Bore d | 8.661 in |
|---|---|
| Outer diameter D | 13.386 in |
| Width B | 4.646 in |
| ISO bore code | 44 |
| Radial section height (D−d)/2 | 60 mm |
| Smallest bore in C4000-series | 50 mm |
| Largest outer diameter in C4000-series | 1030 mm |
| Width range across C4000-series | 30–315 mm |
| Bore position in C4000-series (smallest first) | 14 of 16 |
| Bore above smallest C4000-series size | 170 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| C4044-K30V | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 220×340×118 mm ISO 15 envelope and equivalent catalogue C/C0; C 4044 K30V is the 1:30 tapered-bore K30 full-complement V execution of this size — boundary dimensions interchangeable, only mounting and cage execution differ. |
| 24044 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 220×340×118 mm envelope as the SKF spherical roller bearing SKF 24044 CC/W33, but catalogue C/C0 differ (1930/3250 kN vs 1628/2600 kN) — and the functions differ: spherical locates axially, CARB floats. Pair them; never swap one-for-one. |
| 24044-CCK30-W33 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 220×340×118 mm envelope as the SKF spherical roller bearing SKF 24044 CCK30/W33, but catalogue C/C0 differ (1930/3250 kN vs 1628/2600 kN) — and the functions differ: spherical locates axially, CARB floats. Pair them; never swap one-for-one. |
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 C4044-V model number is decoded
C 4044 V is the dimension series 40 CARB toroidal roller bearings member of the CARB range: 220 mm bore, 340 mm OD, 118 mm width, with the asymmetrical-looking toroidal roller set that defines the CARB principle. In C 4044 V the 40 dimension series fixes the 340 mm OD and 118 mm width around the 220 mm bore (code 44 × 5); the suffix V then selects the cylindrical bore for direct shaft fitting, full-complement V execution (no cage). The V suffix denotes a full complement: the toroidal rollers fill the 118 mm space without a cage, raising C to 1930 kN but cutting the speed ceiling (no reference speed is listed) versus the caged size. The 40000 g mass over the 220×340×118 mm envelope yields about 8.77 kN dynamic per millimetre of bore — the long toroidal rollers give this family its radial capacity density. Mounting: slide the bearing onto the 220 mm seat or heat it (max 120 °C) and seat it square; never press through the 118 mm roller set, and leave the free-end housing shoulder clear so axial float is unrestricted.
Typical equipment & failure modes
Common applications
- paper machine drying cylinders and calender rolls with long, thermally expanding shafts
- 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
Known failure patterns
- raceway spalling once the catalogue L10 life is exceeded or after sustained overload
- roller skew and cage damage after the bearing is clamped solid between shaft and housing shoulders
- PA66 cage (TN9) softening when the sustained temperature passes the polymer limit
- 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 (40 kg here) — lifting gear and induction heating are mandatory, and a cocked ring scores the toroidal raceway before start-up.
- 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 4044 V must float; the two are designed to be used as a pair.
- Never use C 4044 V 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 220 mm bore changes the sleeve family, and the drive-up procedure differs accordingly.
- The 1930/3250 kN ratings and 40000 g mass are SKF catalogue values transcribed from ch. 10.1 of PUB BU/P1 17000 (PDF table page 864); 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 are the dimensions and ratings of the C 4044 V?
A C 4044 V measures 220 mm bore × 340 mm outside diameter × 118 mm width (8.661 × 13.386 × 4.646 in). From SKF catalogue PUB BU/P1 17000: dynamic C 1930 kN, static C0 3250 kN, fatigue limit Pu 280 kN, limiting speed 200 r/min, no reference speed listed, mass about 40000 g.
Can a CARB bearing like C 4044 V locate the shaft axially?
No — that is the defining feature. C 4044 V 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.
How is the C 4044 V designation read?
C = CARB toroidal family; 40 = dimension series; 44 = 220 mm bore (code 44 × 5); suffix V selects cylindrical bore for direct shaft fitting, full-complement V execution (no cage). K is a 1:12 tapered bore for an adapter sleeve, K30 a 1:30 bore for a withdrawal sleeve.
What is the difference between V and TN9 CARB executions?
V is the full-complement execution with no cage — more rollers, higher C (1930 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 4044 V is the cylindrical bore for direct shaft fitting, full-complement V execution (no cage).
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.