HK2220 bearing: complete specifications & equivalents
The HK2220 is a ISO 3245 radial bearing sized 22 x 28 x 20 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 22 mm |
| Outer diameter D | 28 mm |
| Width B | 20 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | none |
| Basic dynamic load rating C | 15.7 kN |
| Basic static load rating C0 | 29 kN |
| Fatigue load limit Pu | 3.45 kN |
| Reference speed (thermal) | 11000 rpm |
| Limiting speed (mechanical) | 12000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 26 g |
| Manufacturer designation | HK 2220 |
| Standard | ISO 3245 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.2 drawn cup needle roller bearings |
| Last verified | 2026-09-26 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.2 drawn cup needle 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. 7.2 drawn cup needle 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 & HK-series range
| Bore d | 0.866 in |
|---|---|
| Outer diameter D | 1.102 in |
| Width B | 0.787 in |
| ISO bore code | 20 |
| Radial section height (D−d)/2 | 3 mm |
| Smallest bore in HK-series | 3 mm |
| Largest outer diameter in HK-series | 68 mm |
| Width range across HK-series | 6–38 mm |
| Bore position in HK-series (smallest first) | 17 of 26 |
| Bore above smallest HK-series size | 19 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| HK2220F | NTN | full Dimensions and internal design equivalent — standard interchange. | NTN counterpart on the same 22×28×20 mm envelope with ratings within 10 % — interchange after checking the execution (cage/seal) details on both pages. |
| HK2220-2RS | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 22×28×20 mm envelope, but catalogue C/C0 differ between the executions (15.7/29 vs 13/22.4 kN) — boundary dimensions 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 HK2220 model number is decoded
HK 2220 is an open-end drawn cup needle roller bearing to ISO 3245: a hardened, thin-walled shell of 28 mm outside diameter carrying a caged needle roller set for a 22 mm shaft, listed by SKF in SKF catalogue PUB BU/P1 17000. In HK 2220, Fw = 22 mm names the shaft that becomes the inner raceway and B = 20 mm the cup width; the shell outside diameter 28 mm is fixed by the boundary plan, so the housing bore needs only a press-fit tolerance. Open caged execution: the standard HK drawn cup with steel cage, relubricable through the shaft where the housing allows. Drawn cups exist open (basic HK), sealed (2RS, with contact seals and grease fill) and with polymer TN cage; each is a separate order number with its own ratings, not a field conversion. For life calculation, the 15.7/29 kN ratings assume raceway geometry supplied by the shaft and housing in families without an inner ring — journal hardness, roundness and finish are part of the bearing, not of the application. Mounting: press the cup in with a shouldered mandrel against the stamped end face only — through-the-rollers pressing brinells both raceways; the housing bore takes a firm press fit and the shaft slides in after.
Typical equipment & failure modes
Common applications
- auto steering gear rack supports
- clutch release mechanisms and cable pulleys
- office equipment and power tool gear trains
- steering column and pedal-box pivots in passenger cars
Known failure patterns
- raceway spalling once the catalogue L10 life is exceeded or after overload events
- fretting corrosion of the cup outside diameter in a soft or oversized housing bore
- abrasive paste formation from dust ingressing past open ends without effective housing seals
- corrosion pitting from condensation in intermittently operated machinery
Selection pitfalls — read before you substitute
- On a 22 mm seat the housing bore quality dominates life: a bore 0.02 mm out of round pinches the 28 mm ring or cup into a lobed shape, and the rollers then trace the housing's geometry error, not the design load.
- Hardness is load capacity: in families without an inner ring the 22 mm journal must hold 58–64 HRC with a ground finish; a surface that looks fine but sits at 45 HRC will rib the raceway within weeks.
- The quoted 15.7/29 kN ratings are SKF catalogue values for this exact execution (HK 2220); ratings can be revised without the order number changing, so keep the catalogue version (SKF catalogue PUB BU/P1 17000) with the drawing.
- The 15.7/29 kN ratings and 26 g mass are SKF catalogue values transcribed from ch. 7.2 of PUB BU/P1 17000 (PDF table page 622); combined-type axial ratings appear in the text above because the structured record carries radial values only.
Frequently asked questions
What are the dimensions and ratings of the HK 2220?
A HK 2220 measures 22 mm bore/Fw × 28 mm outside diameter × 20 mm width (0.866 × 1.102 × 0.787 in). From SKF catalogue PUB BU/P1 17000: radial dynamic rating C 15.7 kN, static C0 29 kN, fatigue limit Pu 3.45 kN, limiting speed 12,000 r/min, reference speed 11,000 r/min, mass about 26 g.
How is the HK 2220 designation read?
HK = open-end drawn cup needle roller bearing (ISO 3245); the first two digits give Fw 22 mm, the last two the width 20 mm, the shell OD 28 mm follows the plan. 2RS adds both-side contact seals, TN the polymer cage.
Can the HK 2220 run on an unhardened shaft?
No. In this execution the 22 mm shaft journal is the inner raceway: it must be ground and hardened to 58–64 HRC (with matching housing bore quality on the outside). If the shaft cannot meet that, order the inner-ring sibling (NKI/NA execution) plus its ground inner ring instead.
How should the HK 2220 be mounted?
Press the cup in with a shouldered mandrel bearing on the stamped face, into a housing bore sized for a firm press fit; never hammer it or press through the rollers. Then slide the hardened shaft in. For 2RS executions the seals and grease are already in place — no additional sealing is needed.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.2 drawn cup needle roller bearings on 2026-09-26. Read our editorial & correction policy.