HK1616F bearing: complete specifications & equivalents
The HK1616F is a ISO 3245 radial bearing sized 16 x 22 x 16 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 | 16 mm |
| Seal / shield | open |
| Basic dynamic load rating C | 11.1 kN |
| Basic static load rating C0 | 15.3 kN |
| Fatigue load limit Pu | 1.87 kN |
| Limiting speed (mechanical) | 10000 rpm |
| Mass | 16 g |
| Manufacturer designation | HK1616F |
| 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 | 0.63 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 HK1616F model number is decoded
In the HK-series (ISO 3245), HK1616F is NTN's open-end drawn-cup needle roller bearing.Boundary dimensions are 16 mm under-roller diameter (Fw — the shaft journal acts as the raceway), 22 mm cup outside diameter and 16 mm width. 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. In this mid size range the HK cup is the standard compact radial bearing choice across automotive and industrial gearboxes. This size is frequently specified in motorcycle gear-selector mechanisms, where the shaft is short, the housing is cast around the bearing, and the roller set must survive repeated shock from shift forks. Grease for this size should be a soft NLGI 1 or 2 lithium-complex grade: the open cup lets the housing supply the lubricant, and a stiff grease will not flow back through the roller set after standstill.
Typical equipment & failure modes
Common applications
- universal joint and steering pivots
- automotive manual transmission gear sets
- industrial gearbox lay shafts
- intermittent duty with long standstill periods that invite false brinelling
Known failure patterns
- brinelling of the drawn cup from hammer blows during press-in mounting
- grease starvation in the open-end arrangement with no relubrication path
- raceway spalling on a shaft that was below the required 58–64 HRC hardness
Selection pitfalls — read before you substitute
- The open ends of HK1616F retain no lubricant: grease must be supplied by the housing arrangement, and adjacent seals are needed in dirty or washdown duty.
- At a 16 mm shaft diameter, check housing bore roundness after previous bearing removal for HK1616F; a pulled or scored seat must be re-machined or sleeved before the new cup goes in.
- The cage in HK1616F 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 16 mm.
- The 16 mm standard width of HK1616F is the general-purpose section at 16 mm shaft; wider HK variants in the same 16×22 mm envelope carry more load and are not interchangeable if the housing width is fixed.
Frequently asked questions
Does HK1616F need a hardened shaft?
Either the 16 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 (IR12x16x20) so a standard unhardened shaft can be used.
What are the dimensions of a HK1616F needle roller bearing?
A HK1616F drawn-cup needle roller bearing has a 16 mm shaft diameter (Fw, under-roller diameter), 22 mm outside diameter and 16 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 HK1616F drawn-cup bearing?
Fw is the under-roller diameter — the diameter of the shaft journal on which the needle rollers run directly. For HK1616F, 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 HK1616F needle roller bearing carry axial load?
No. Drawn-cup needle roller bearings like HK1616F 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.
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.