HK1622ZWFD bearing: complete specifications & equivalents
The HK1622ZWFD is a ISO 3245 radial bearing sized 16 x 22 x 22 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 16 mm |
| Outer diameter D | 22 mm |
| Width B | 22 mm |
| Seal / shield | open |
| Basic dynamic load rating C | 13.3 kN |
| Basic static load rating C0 | 19.4 kN |
| Fatigue load limit Pu | 2.37 kN |
| Limiting speed (mechanical) | 10000 rpm |
| Mass | 22 g |
| Manufacturer designation | HK1622ZWFD |
| 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 | 0.63 in |
|---|---|
| Outer diameter D | 0.866 in |
| Width B | 0.866 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) | 13 of 24 |
| Bore above smallest HK-series size | 13 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the HK1622ZWFD model number is decoded
As an open-end drawn-cup needle roller bearing in the HK-series (ISO 3245), NTN HK1622ZWFD is built around a thin hardened steel cup.Its printed envelope — 16 mm under-roller diameter, 22 mm outside diameter, 22 mm width — is fixed by ISO 3245; the 16 mm figure is the shaft journal itself, which carries the rollers directly. 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 ZW suffix marks two roller rows in the same cup, roughly doubling the dynamic rating of the width-equivalent single-row version at the cost of the extra width. Mid-size drawn cups like this appear throughout passenger-car and light-truck transmissions, pressed into cast housings where a machined ring would not fit. Small electric actuators and valve gear specify this size on the output shaft, where the gearmotor pinion needs support but the casting leaves no room for a machined ring. In dusty environments, place an external lip seal or felt washer immediately adjacent to the open cup end; the rollers have no defence against grit that migrates through the housing.
Typical equipment & failure modes
Common applications
- compressor crankshaft supports
- agricultural machinery PTO drives
- universal joint and steering pivots
- shock-loaded start-stop service such as clutch and kick-starter mechanisms
Known failure patterns
- edge loading and needle skewing under shaft misalignment or deflection
- cage wear or fracture from sustained operation near the limiting speed
- cup cracking from an oval or tapered housing bore distorting the thin shell
Selection pitfalls — read before you substitute
- Mid-size cups like HK1622ZWFD (16 mm shaft) inherit the shape of their seat: a scored or oval housing bore from the previous bearing will cut the new bearing's life short.
- The two roller rows in HK1622ZWFD share one cup: any shaft bending or housing-bore taper loads one row ahead of the other, so hold the 22 mm seat straight over the full 22 mm width and keep shaft deflection minimal.
- The 22 mm wide section of HK1622ZWFD gains rating through longer rollers at 16 mm shaft; confirm the housing width accepts 22 mm — it will not drop into a seat machined for the 16×22 mm narrow variant.
- HK1622ZWFD runs directly on the shaft: the 16 mm shaft journal must be hardened to 58–64 HRC and ground to Ra ≤ 0.2 µm, or fit the matching IR inner ring instead.
- The open ends of HK1622ZWFD retain no lubricant: grease must be supplied by the housing arrangement, and adjacent seals are needed in dirty or washdown duty.
Frequently asked questions
What are the dimensions of a HK1622ZWFD needle roller bearing?
A HK1622ZWFD drawn-cup needle roller bearing has a 16 mm shaft diameter (Fw, under-roller diameter), 22 mm outside diameter and 22 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 HK1622ZWFD drawn-cup bearing?
Fw is the under-roller diameter — the diameter of the shaft journal on which the needle rollers run directly. For HK1622ZWFD, Fw = 16 mm, so the shaft must be machined to 16 mm, hardened to 58–64 HRC and ground, unless a separate IR inner ring is fitted.
Can a HK1622ZWFD needle roller bearing carry axial load?
No. Drawn-cup needle roller bearings like HK1622ZWFD 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.
How is a HK1622ZWFD retained in the housing?
The thin-walled drawn cup of HK1622ZWFD is press-fitted into a 22 mm housing bore (typically N6/N7 tolerance for steel housings). The press fit alone retains the cup — no snap rings or shoulders are needed, but the bore must be round and rigid.
What duty conditions suit a HK1622ZWFD drawn-cup bearing?
HK1622ZWFD is typically specified for dirty environments where the open ends rely entirely on the housing seals; match the grease/oil speed limits (10000/15000 rpm) and radial load against the actual duty before finalizing.
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.