C30-710-M bearing: complete specifications & equivalents
The C30-710-M is a ISO 15 radial bearing sized 710 x 1030 x 236 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 710 mm |
| Outer diameter D | 1030 mm |
| Width B | 236 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 8800 kN |
| Basic static load rating C0 | 17300 kN |
| Fatigue load limit Pu | 1060 kN |
| Reference speed (thermal) | 400 rpm |
| Limiting speed (mechanical) | 560 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 655000 g |
| Manufacturer designation | C 30/710 M |
| 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 & C3000-series range
| Bore d | 27.953 in |
|---|---|
| Outer diameter D | 40.551 in |
| Width B | 9.291 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 160 mm |
| Smallest bore in C3000-series | 120 mm |
| Largest outer diameter in C3000-series | 1420 mm |
| Width range across C3000-series | 46–308 mm |
| Bore position in C3000-series (smallest first) | 27 of 33 |
| Bore above smallest C3000-series size | 590 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| C30-710-KM | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 710×1030×236 mm ISO 15 envelope and equivalent catalogue C/C0; C 30/710 KM is the 1:12 tapered-bore K M 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 C30-710-M model number is decoded
C 30/710 M belongs to the CARB family — compact aligning roller bearings: envelope 710×1030×236 mm, radial rating 8800/17300 kN C/C0, and no axial-locating function by design. In C 30/710 M the 30 dimension series fixes the 1030 mm OD and 236 mm width around the 710 mm bore (the bore is written directly after the slash (no bore code)); the suffix M then selects the cylindrical bore for direct shaft fitting, machined brass M cage. The M suffix is a one-piece machined brass cage centred on the rollers, supplied for the 710 mm and larger sizes needing robust guidance under heavy load. Float capacity is a selection criterion: the catalogue lists the permissible axial displacement (s) for the 236 mm wide set; size the free-end housing so thermal growth stays within it, not just inside the overall width. Seat tolerances follow the ISO 15 recommendation for the heavy-loaded position — the 1030 mm outer ring typically takes a loose housing fit to preserve float, and the rings must be supported across their full faces.
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
- 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
- rolling-contact fatigue spalling after the catalogue L10 life is exhausted
- grease churning and overheating when a high-speed thrust position is over-packed
Selection pitfalls — read before you substitute
- At 710 mm bore the 655 kg mass and 236 mm width make seating geometry dominant: sphered-washer seats and oil flow must be verified in place, not just on the drawing.
- Reference and limiting speeds are different limits: the 400 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.
- The quoted 8800/17300 kN ratings belong to this exact execution (C 30/710 M); VE240 vibrating-screen variants and sealed 2CS/2NS variants have their own figures even at the same envelope.
- Tapered-bore K executions mount on adapter sleeves (1:12) and K30 on withdrawal sleeves (1:30) — the 710 mm bore changes the sleeve family, and the drive-up procedure differs accordingly.
- Never use C 30/710 M 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 8800/17300 kN ratings and 655000 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
How is the C 30/710 M designation read?
C = CARB toroidal family; 30 = dimension series; 710 mm (slash-size) = 710 mm bore (the bore is written directly after the slash (no bore code)); suffix M selects cylindrical bore for direct shaft fitting, machined brass M 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 (8800 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 30/710 M is the cylindrical bore for direct shaft fitting, machined brass M cage.
How is C 30/710 M mounted?
Slide or heat (max 120 °C) the bearing onto the 710 mm seat, give the outer ring a loose housing fit, leave the float travel unobstructed, and never press through the 236 mm roller set.
What are the dimensions and ratings of the C 30/710 M?
A C 30/710 M measures 710 mm bore × 1030 mm outside diameter × 236 mm width (27.953 × 40.551 × 9.291 in). From SKF catalogue PUB BU/P1 17000: dynamic C 8800 kN, static C0 17300 kN, fatigue limit Pu 1060 kN, reference speed 400 r/min, limiting speed 560 r/min, mass about 655000 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.