22218 bearing: complete specifications & equivalents

The 22218 is a ISO 15 radial bearing sized 90 x 160 x 40 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.

Principal dimensions: bore d 90 mm, outer diameter D 160 mm, width B 40 mm. Schematic, not to scale.

Specification table

Parameter	Value
Brand	SKF
Bore diameter d	90 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	331 kN
Basic static load rating C0	375 kN
Fatigue load limit Pu	39 kN
Reference speed (thermal)	3800 rpm
Limiting speed (mechanical)	5300 rpm
Operating temperature	-40 to +120 °C
Mass	3400 g
Manufacturer designation	SKF 22218 E
Standard	ISO 15
Catalog version	SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.1 spherical roller bearings
Last verified	2026-09-26

Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.1 spherical roller bearings) · extracted 2026-09-26

Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.1 spherical 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 & 22200-series range

Bore d	3.543 in
Outer diameter D	6.299 in
Width B	1.575 in
ISO bore code	18
Radial section height (D−d)/2	35 mm
Smallest bore in 22200-series	25 mm
Largest outer diameter in 22200-series	580 mm
Width range across 22200-series	18–150 mm
Bore position in 22200-series (smallest first)	14 of 32
Bore above smallest 22200-series size	65 mm

Cross references & equivalents

Equivalent model	Brand	Match level	Note
22218-EK	SKF	full Dimensions and internal design equivalent — standard interchange.	Tapered-bore (1:12) execution on H318 adapter sleeve; same ISO 15 envelope, separate order number.
C2218	SKF	full Dimensions and internal design equivalent — standard interchange.	SKF CARB toroidal bearing C 2218 shares the 90×160×40 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute.
C2218-K	SKF	full Dimensions and internal design equivalent — standard interchange.	SKF CARB toroidal bearing C 2218 K shares the 90×160×40 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute.

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 22218 model number is decoded

Ordering number 22218 E in SKF catalogue PUB BU/P1 17000 denotes a double-row spherical roller bearing for a 90 mm shaft, dimension series 22 (medium OD, wide), with open execution and a stamped window-type steel cage. On the SKF nameplate, 22218 follows the ISO 15 convention: 2 for the spherical roller type, 22 for the dimension series 22 (medium OD, wide), final digits 18 for the 90 mm bore. In SKF suffix language, E marks the optimized high-capacity design and CC/W33 the pressed-steel-cage execution with relubrication groove; both are open bearings — the sealed variant carries the 2CS5 suffix and the vibrating-screen execution VA405. The 39 kN Pu figure feeds the adjusted-life equation at contaminated or partial-film conditions, and the 1.13 C0/C balance shows this execution is tuned to heavy radial-plus-axial duty with misalignment tolerance. After mounting, swing the outer ring to confirm free self-alignment: the 22218 should tilt through its full catalogue misalignment range without binding; a stiff joint signals a cocked seat or shoulder interference.

Typical equipment & failure modes

Common applications

cement-mill trunnion and drive shafts
heavy conveyor head shafts in mining
jaw and cone crusher main shafts
paper-machine press and dryer rolls

Known failure patterns

raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating
inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range
stamped-steel cage fatigue after long service in high-vibration screening duty without the VA405 execution
surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows
smearing on the roller-raceway contact during skid starts below the minimum load

Selection pitfalls — read before you substitute

Mount the 90 mm bore 22218 by induction heating (max 120 °C) or oil injection — driving a bearing of this section home through the rollers brinells both raceways, and the damage only speaks up as vibration hours later.
The 22200-series series at 90 mm bore (160×40 mm) is the general-purpose spherical roller envelope; stepping up to 223 adds capacity and width, stepping to 230 trims the OD — neither is interchangeable without re-checking shoulders and speed.
The 3400 g mass and 40 mm width mean abutment faces must be square to the axis within the bearing's own P0 tolerance; a tilted spacer tilts the outer ring and concentrates load on one roller row of 22218.
The 3400 g mass and 40 mm width mean abutment faces must be square to the axis within the bearing's own P0 tolerance; a tilted spacer tilts the outer ring and concentrates load on one roller row of 22218.
The 331/375 kN ratings are SKF catalogue values for this exact execution (22218 E); SKF can revise internal geometry without changing the order number, so keep the catalogue version (SKF catalogue PUB BU/P1 17000) with the specification and re-verify for critical drives.
SKF lists several executions of 22218 (cylindrical bore as listed, tapered-bore 22218 EK variant, plus sealed and vibrating-screen options in the same envelope); they are not interchangeable order numbers — quote the full 22218 E designation when purchasing.

Frequently asked questions

What are the dimensions and catalogue data of 22218?

The 22218 E is a double-row spherical roller bearing with 90 mm bore, 160 mm outer diameter and 40 mm width (3.543 × 6.299 × 1.575 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 331 kN, C0 375 kN, fatigue load limit Pu 39 kN, reference speed 3,800 r/min, limiting speed 5,300 r/min, mass about 3400 g. It is an open, self-aligning bearing with a stamped window-type steel cage.

How does the 22218 bore code work?

The last two digits of 22218 are bore code 18, so 18 × 5 = 90 mm bore. The 160 mm OD and 40 mm width come from the ISO 15 dimension-series plan (dimension series 22 (medium OD, wide)), shared with other spherical roller bearings of the same code.

What does the E suffix mean on 22218?

E is the SKF optimized internal design with larger rollers and a stamped window-type steel cage for higher load ratings. The EK variant is the same bearing with a 1:12 tapered bore for adapter sleeves.

Can 22218 accommodate misalignment and axial load?

Yes on both counts. The sphered outer raceway lets the bearing self-align ≈ 0.5–2.5° depending on series, absorbing shaft deflection and housing-seat errors. The two barrel-roller rows also carry bidirectional axial load in addition to heavy radial load — this is the key difference from cylindrical roller bearings, which take no axial load.

When should the tapered-bore 22218K variant be used instead?

Choose the K (1:12 tapered bore) variant when the bearing must seat on an adapter or withdrawal sleeve — typical for long shafts, frequent dismounting, or stepped shafts where machining a precision journal is impractical. Sleeve mounting requires measuring clearance reduction or axial drive-up, not nut torque. The cylindrical-bore 22218 listed here seats directly on a machined journal.

Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.1 spherical roller bearings on 2026-09-26. Read our editorial & correction policy.