C4010-TN9 bearing: complete specifications & equivalents
The C4010-TN9 is a ISO 15 radial bearing sized 50 x 80 x 30 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 50 mm |
| Outer diameter D | 80 mm |
| Width B | 30 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | polymer (PA66 glass-fibre reinforced) |
| Basic dynamic load rating C | 116 kN |
| Basic static load rating C0 | 140 kN |
| Fatigue load limit Pu | 16.3 kN |
| Reference speed (thermal) | 5600 rpm |
| Limiting speed (mechanical) | 7500 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 550 g |
| Manufacturer designation | C 4010 TN9 |
| 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 | 1.969 in |
|---|---|
| Outer diameter D | 3.15 in |
| Width B | 1.181 in |
| ISO bore code | 10 |
| Radial section height (D−d)/2 | 15 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) | 1 of 16 |
| Bore above smallest C4000-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| C4010-V | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 50×80×30 mm envelope, but catalogue C/C0 differ between the cylindrical-bore TN9 PA66-caged and cylindrical-bore full-complement V executions (116/140 kN vs 137/176 kN) — envelope match, not a load-rating equivalent. |
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 C4010-TN9 model number is decoded
SKF lists C 4010 TN9 in the dimension series 40 CARB toroidal roller bearings: the toroidal roller profile both follows tolerates angular misalignment and lets the inner ring slide axially inside the outer ring, giving free axial displacement at the non-locating position. Reading the code: C marks the CARB toroidal family, the first two digits (40) identify the ISO dimension series and the last two (10) encode the 50 mm bore; suffixes describe bore and execution. The TN9 suffix marks a glass fibre reinforced PA66 cage: lower friction and quieter than the full-complement V execution, with a 5,600 r/min reference speed, the usual choice for continuous-duty fans and paper rolls. Float capacity is a selection criterion: the catalogue lists the permissible axial displacement (s) for the 30 mm wide set; size the free-end housing so thermal growth stays within it, not just inside the overall width. 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
- 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
- continuous-caster guide rolls and slab-caster segments under heat growth
Known failure patterns
- roller-end and flange smearing after lubricant starvation at the long roller contacts
- thermal preloading when a shaft is located at both ends and growth has nowhere to go
- PA66 cage (TN9) softening when the sustained temperature passes the polymer limit
- 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 50 mm bore the small CARB executions are unusually wide (30 mm) for their 80 mm OD — confirm the housing width before substituting a standard spherical bearing of the same bore.
- The quoted 116/140 kN ratings belong to this exact execution (C 4010 TN9); VE240 vibrating-screen variants and sealed 2CS/2NS variants have their own figures even at the same envelope.
- 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 4010 TN9 must float; the two are designed to be used as a pair.
- Never use C 4010 TN9 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 116/140 kN ratings and 550 g mass are SKF catalogue values transcribed from ch. 10.1 of PUB BU/P1 17000 (PDF table page 858); 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
Why is C 4010 TN9 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.
Is the C 4010 TN9 sealed?
No, it is an open execution relying on the housing seals; relubrication follows the groove/hole features of the size.
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 4010 TN9 have?
A C 4010 TN9 measures 50 mm bore × 80 mm outside diameter × 30 mm width (1.969 × 3.15 × 1.181 in). From SKF catalogue PUB BU/P1 17000: dynamic C 116 kN, static C0 140 kN, fatigue limit Pu 16.3 kN, reference speed 5,600 r/min, limiting speed 7,500 r/min, mass about 550 g.
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.