C2218-K-H318-E bearing: complete specifications & equivalents
The C2218-K-H318-E is a ISO 15 radial bearing sized 80 x 160 x 40 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 80 mm |
| Outer diameter D | 160 mm |
| Width B | 40 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 325 kN |
| Basic static load rating C0 | 380 kN |
| Fatigue load limit Pu | 41.5 kN |
| Reference speed (thermal) | 3800 rpm |
| Limiting speed (mechanical) | 5300 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 4500 g |
| Manufacturer designation | SKF C 2218 K + H 318 E |
| 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-adapter-sleeve range
| Bore d | 3.15 in |
|---|---|
| Outer diameter D | 6.299 in |
| Width B | 1.575 in |
| ISO bore code | 18 |
| Radial section height (D−d)/2 | 40 mm |
| Smallest bore in carb-adapter-sleeve | 25 mm |
| Largest outer diameter in carb-adapter-sleeve | 1580 mm |
| Width range across carb-adapter-sleeve | 20–462 mm |
| Bore position in carb-adapter-sleeve (smallest first) | 12 of 51 |
| Bore above smallest carb-adapter-sleeve size | 55 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| C2218 | 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 C2218-K-H318-E model number is decoded
The locknut torque of H 318 E sets the sleeve travel; use the SKF procedure (measure clearance reduction, not torque feel) — over-driving the sleeve preloads the 90 mm CARB bearing and overheats the unit within hours. The unit's temp range follows the bearing: -40 to +120 °C continuous for the standard execution; cage and sleeve execution letters on C 2218 K and H 318 E must be checked against the application temperature before substitution.C2218-K-H318-E is a complete SKF mounting unit: the CARB toroidal roller bearing C 2218 K supplied on its adapter sleeve H 318 E, listed in SKF catalogue PUB BU/P1 17000 for a 80 mm shaft seat.Numbering logic: the bearing half C 2218 K follows the CARB works numbering (type C, dimension series, 90 mm bore), while H 318 E identifies the sleeve execution for that bore; the combo C2218-K-H318-E exists in the catalogue so that shaft (80 mm), housing (160 mm) and both components are specified with one order number. OH execution note: H 318 E is a withdrawal-type sleeve — it gives a more defined interference than a locknut adapter and can be removed without heavy hammer work, which at this bearing size protects the 80 mm shaft seat during overhauls. With a combined mass of 4.5 kg over the 80×160×40 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.
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
- paper machine drying cylinders and calender rolls with long, thermally expanding shafts
Known failure patterns
- sleeve creep on the shaft seat when the sleeve was not driven to its marked travel or clearance
- fretting corrosion at the shaft-sleeve interface under vibration with an undersized seat
- sleeve creep on the shaft seat when the sleeve was not driven to its marked travel or clearance
- fretting corrosion at the shaft-sleeve interface under vibration with an undersized seat
- overheating from a preload set at mounting when sleeve travel overshot the catalogue clearance
Selection pitfalls — read before you substitute
- Sleeve and bearing are a matched taper pair: never fit sleeve H 318 E onto a different CARB bearing of the same bore size without verifying the execution letters — seat length and taper contact differ.
- Contamination discipline: the CARB bearing is open (this execution has no seals); flush the housing before mounting C2218-K-H318-E and maintain the lubricant filtration — hard particles indent the toroidal raceway quickly at heavy load.
- Do not run C2218-K-H318-E 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 325/380 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 2218 K + H 318 E 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 C2218-K-H318-E?
The unit is CARB bearing C 2218 K on adapter sleeve H 318 E, fitting a 80 mm shaft (3.15 in), housing bore 160 mm, bearing width 40 mm. From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 325 kN, C0 380 kN, fatigue load limit Pu 41.5 kN, combined mass about 4.5 kg. Reference speed 3,800 r/min, limiting speed 5,300 r/min (bearing values).
Why does C2218-K-H318-E list a 80 mm shaft size when the bearing bore is 90 mm?
The sleeve takes up the difference: the adapter sleeve H 318 E has a tapered outside that engages the bearing's 90 mm tapered bore and a cylindrical bore that seats on the 80 mm shaft. The catalogue's principal dimensions describe the mounted result — shaft seat, housing bore and bearing width — not the bearing bore alone.
Is C2218-K-H318-E 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 2218 K and the sleeve H 318 E 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 C2218-K-H318-E as one catalogue line keeps bearing and sleeve compatible; if ordering separately, quote both full designations including execution letters.
How is the clearance of C2218-K-H318-E set at mounting?
By driving the adapter sleeve up its conical seat: the sleeve expands on the 80 mm shaft and onto the bearing bore, reducing the radial internal clearance. Mount in steps and measure residual clearance until it reaches the catalogue value for the K bore — never set it by nut torque alone.
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.