HK2220F bearing: complete specifications & equivalents
The HK2220F 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 | NTN |
| Bore diameter d | 22 mm |
| Outer diameter D | 28 mm |
| Width B | 20 mm |
| Seal / shield | open |
| Basic dynamic load rating C | 16.8 kN |
| Basic static load rating C0 | 28.8 kN |
| Fatigue load limit Pu | 3.5 kN |
| Limiting speed (mechanical) | 7500 rpm |
| Mass | 26 g |
| Manufacturer designation | HK2220F |
| Standard | ISO 3245 |
| Catalog version | CAT. No. 2203-3/E 2024 |
| Last verified | 2026-09-25 |
Source: catalog reference (CAT. No. 2203-3/E 2024) · extracted 2026-09-25
Parameters extracted from the official NTN Ball and Roller Bearings catalogue (CAT. No. 2203-3/E 2024); NTN® is a trademark of NTN Corporation, used here for identification only — mpnbase is not an authorized NTN distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at ntnglobal.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 | — |
| Radial section height (D−d)/2 | 3 mm |
| Smallest bore in HK-series | 3 mm |
| Largest outer diameter in HK-series | 58 mm |
| Width range across HK-series | 6–38 mm |
| Bore position in HK-series (smallest first) | 17 of 24 |
| Bore above smallest HK-series size | 19 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the HK2220F model number is decoded
HK2220F is an NTN drawn-cup needle roller bearing with open ends in the HK-series (ISO 3245 boundary dimensions).The designation encodes the shaft fit directly: Fw = 22 mm is the under-roller diameter, i.e. the shaft journal that serves as the inner raceway; the cup outside diameter is 28 mm and the width is 20 mm. There is no separate inner ring — the thin-walled cup is drawn from sheet steel, hardened, and press-fitted into the housing, giving the smallest radial section of any rolling bearing at this shaft size. The F suffix marks NTN's caged drawn-cup execution: a formed steel cage spaces the rollers, lowering friction versus full-complement drawn cups. Automotive gearbox designers default to this class when the radial envelope is fixed: the cup keeps the casing compact without giving up the required rating. Small compressor crankshafts and refrigeration equipment fit this size on the eccentric pin, where the housing bore is finish-bored in the same setup as the main bearing seats. Where the housing is a welded fabrication, finish-bore the seat after all welding and stress-relief is complete — pressing the cup into a distorted, as-welded bore guarantees early spalling.
Typical equipment & failure modes
Common applications
- industrial gearbox lay shafts
- hydraulic pump and motor shafts
- compressor crankshaft supports
- continuous high-speed rotation where grease redistribution is the limiting factor
Known failure patterns
- cup cracking from an oval or tapered housing bore distorting the thin shell
- fretting of the cup outer surface in a soft or worn housing seat
- scoring of the needle rollers from abrasive contamination past the open ends
Selection pitfalls — read before you substitute
- The 20 mm wide section of HK2220F gains rating through longer rollers at 22 mm shaft; confirm the housing width accepts 20 mm — it will not drop into a seat machined for the 22×28 mm narrow variant.
- Needle rollers tolerate almost no misalignment; if the 28 mm housing seat cannot be held square to the shaft, expect edge loading and early spalling.
- Press the drawn cup in with a mandrel bearing on the stamped face only — never hammer the cup or press through the rollers, that cracks or brinells the shell.
- Before pressing HK2220F in, verify the 22 mm housing seat is still round — extracting the old cup often pulls the bore, and the new thin shell will conform to any distortion.
- The cage in HK2220F guides the rollers but is not a seal: it retains nothing against dust or washdown, so the housing still needs its own sealing arrangement at 22 mm.
Frequently asked questions
Can a HK2220F needle roller bearing carry axial load?
No. Drawn-cup needle roller bearings like HK2220F carry radial load only and provide no axial shaft location. Axial forces must be carried by separate thrust washers or a locating bearing in the arrangement.
Does HK2220F need a hardened shaft?
Either the 22 mm shaft journal must be hardened to 58–64 HRC and ground to Ra ≤ 0.2 µm, or you can fit the matching inner ring (IR17x22x20.5) so a standard unhardened shaft can be used.
What duty conditions suit a HK2220F drawn-cup bearing?
HK2220F is typically specified for intermittent duty with long standstill periods that invite false brinelling; match the grease/oil speed limits (7500/11000 rpm) and radial load against the actual duty before finalizing.
What are the dimensions of a HK2220F needle roller bearing?
A HK2220F drawn-cup needle roller bearing has a 22 mm shaft diameter (Fw, under-roller diameter), 28 mm outside diameter and 20 mm width, per ISO 3245 boundary dimensions. It has no inner ring — the shaft journal serves as the raceway.
What does Fw mean on a HK2220F drawn-cup bearing?
Fw is the under-roller diameter — the diameter of the shaft journal on which the needle rollers run directly. For HK2220F, Fw = 22 mm, so the shaft must be machined to 22 mm, hardened to 58–64 HRC and ground, unless a separate IR inner ring is fitted.
Reviewed & verified by the MPN Base engineering desk against source catalog CAT. No. 2203-3/E 2024 on 2026-09-25. Read our editorial & correction policy.