C2215-K-AH315-G bearing: complete specifications & equivalents
The C2215-K-AH315-G is a ISO 15 radial bearing sized 70 x 130 x 31 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 70 mm |
| Outer diameter D | 130 mm |
| Width B | 31 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 196 kN |
| Basic static load rating C0 | 208 kN |
| Fatigue load limit Pu | 24 kN |
| Reference speed (thermal) | 4800 rpm |
| Limiting speed (mechanical) | 6700 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1900 g |
| Manufacturer designation | SKF C 2215 K + AH 315 G |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 10.2-10.3 CARB on sleeves |
| Last verified | 2026-09-29 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 10.2-10.3 CARB on sleeves) · extracted 2026-09-29
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 10.2-10.3 CARB on sleeves); 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 & carb-withdrawal-sleeve range
| Bore d | 2.756 in |
|---|---|
| Outer diameter D | 5.118 in |
| Width B | 1.22 in |
| ISO bore code | 15 |
| Radial section height (D−d)/2 | 30 mm |
| Smallest bore in carb-withdrawal-sleeve | 35 mm |
| Largest outer diameter in carb-withdrawal-sleeve | 1580 mm |
| Width range across carb-withdrawal-sleeve | 23–462 mm |
| Bore position in carb-withdrawal-sleeve (smallest first) | 8 of 49 |
| Bore above smallest carb-withdrawal-sleeve size | 35 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| C2215 | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 15 boundary-dimension envelope; brand-specific OEM equivalents (NSK/FAG/NTN) pending multi-source data. |
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 C2215-K-AH315-G model number is decoded
In SKF catalogue PUB BU/P1 17000, C2215-K-AH315-G appears as bearing C 2215 K + withdrawal sleeve AH 315 G — the large-size execution of the CARB non-locating principle, delivered as one assembly weighing 2 kg.On the SKF nameplate, C2215-K-AH315-G reads as two catalogued components: the CARB bearing C 2215 K with its 75 mm tapered (K) bore, and the withdrawal sleeve AH 315 G whose seat diameter matches that bore — the sleeve number encodes the bearing bore, never the 70 mm shaft size. The AH 315 G execution defines the fit on the 70 mm cylindrical seat by sleeve travel rather than locknut torque; the mounting procedure records that travel, because the running clearance of the CARB bearing is set by the same taper. With a combined mass of 1.9 kg over the 70×130×31 mm principal plan, the unit replaces a machined shoulder seat — the mass difference against the bare bearing is the sleeve steel, priced into the one order number. Record the sleeve travel at mounting of C2215-K-AH315-G: the clearance set into the 75 mm bearing today is the reference for the next re-clearance check, and travel data catches seat wear on the 70 mm shaft over the years. Spare-parts note: order C2215-K-AH315-G as the unit; a bare C 2215 K plus a separately sourced sleeve risks taper mismatch — the catalogue pairing is the guarantee that seat and bore were ground for each other.
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
- heavy industrial gearbox layshafts used as the non-locating position
Known failure patterns
- overheating from a preload set at mounting when sleeve travel overshot the catalogue clearance
- fretting corrosion at the shaft-sleeve interface under vibration with an undersized seat
- misalignment edge loading when the housing bore is out of square with the shaft seat
- raceway spalling of the CARB bearing after the catalogue L10 life under contaminated lubrication
- overheating from a preload set at mounting when sleeve travel overshot the catalogue clearance
Selection pitfalls — read before you substitute
- Never set C2215-K-AH315-G by locknut torque or "feel": the withdrawal sleeve travel defines the clearance of the 75 mm CARB bearing — measure residual radial clearance during mounting, in steps.
- Do not re-use a sleeve that shows taper scuffing: a scratched cone changes the travel-to-clearance relationship of the whole C2215-K-AH315-G unit — replace the sleeve with the bearing.
- Do not run C2215-K-AH315-G as a locating bearing: the CARB raceway is toroidal and the unit is designed to float axially; blocking it against a shoulder preloads the rollers and ends in thermal failure.
- The 196/208 kN ratings are SKF catalogue 17000 values for the CARB bearing; SKF can revise internal geometry without changing the order number, so keep the catalogue version (PUB BU/P1 17000/1 EN, 2018) with the specification.
- Quote the full unit designation SKF C 2215 K + AH 315 G when purchasing — bearing and sleeve execution letters are part of the order number and define the matched taper pair.
Frequently asked questions
What are the dimensions and catalogue data of C2215-K-AH315-G?
The unit is CARB bearing C 2215 K on withdrawal sleeve AH 315 G, fitting a 70 mm shaft (2.756 in), housing bore 130 mm, bearing width 31 mm. From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 196 kN, C0 208 kN, fatigue load limit Pu 24 kN, combined mass about 1.9 kg. Reference speed 4,800 r/min, limiting speed 6,700 r/min (bearing values).
Why does C2215-K-AH315-G list a 70 mm shaft size when the bearing bore is 75 mm?
The sleeve takes up the difference: the withdrawal sleeve AH 315 G has a tapered outside that engages the bearing's 75 mm tapered bore and a cylindrical bore that seats on the 70 mm shaft. The catalogue's principal dimensions describe the mounted result — shaft seat, housing bore and bearing width — not the bearing bore alone.
Is C2215-K-AH315-G a locating or non-locating bearing?
Non-locating. The CARB toroidal roller bearing is designed as the free end of the shaft: its raceway geometry tolerates misalignment and allows axial float, while a separate locating bearing (typically a spherical roller or paired taper) takes the thrust. The sleeve does not change this function.
Can I buy the bearing C 2215 K and the sleeve AH 315 G separately?
The components are catalogued separately, but the taper pair is matched — the sleeve seat and the bearing bore are manufactured to the same execution. Ordering the unit C2215-K-AH315-G as one catalogue line keeps bearing and sleeve compatible; if ordering separately, quote both full designations including execution letters.
How is the clearance of C2215-K-AH315-G set at mounting?
By sleeve travel: the withdrawal sleeve AH 315 G is driven or pressed to a marked travel on the 70 mm seat, which sets the interference into the 75 mm bore and with it the radial clearance. Record the travel; hydraulic assistance is standard at this size.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 10.2-10.3 CARB on sleeves on 2026-09-29. Read our editorial & correction policy.