HK4516 bearing: complete specifications & equivalents
The HK4516 is a ISO 3245 radial bearing sized 45 x 52 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 | 45 mm |
| Outer diameter D | 52 mm |
| Width B | 16 mm |
| Seal / shield | open |
| Basic dynamic load rating C | 21.6 kN |
| Basic static load rating C0 | 43 kN |
| Fatigue load limit Pu | 5.25 kN |
| Limiting speed (mechanical) | 3700 rpm |
| Mass | 46 g |
| Manufacturer designation | HK4516 |
| 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 | 1.772 in |
|---|---|
| Outer diameter D | 2.047 in |
| Width B | 0.63 in |
| ISO bore code | 16 |
| Radial section height (D−d)/2 | 3.5 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) | 23 of 24 |
| Bore above smallest HK-series size | 42 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the HK4516 model number is decoded
HK4516 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 = 45 mm is the under-roller diameter, i.e. the shaft journal that serves as the inner raceway; the cup outside diameter is 52 mm and the width is 16 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. No suffix letters follow the size code: this is the basic caged drawn-cup execution in the HK range. Larger drawn cups demand more of the housing: cast seats should be checked for roundness and rigidity before the cup is pressed in. Industrial sewing machines and textile equipment run this size on their shuttle and needle-bar drive shafts, where the compact radial section keeps the arm profile slim. Shaft tolerance for this size is h5 or j5: the roller complement needs a controlled radial clearance, and a shaft ground to general-purpose tolerances can leave the bearing either slack or pinched.
Typical equipment & failure modes
Common applications
- rolling mill auxiliary drives
- heavy gearbox and final drive shafts
- construction equipment swing pivots
- reciprocating or oscillating motion where the rollers never complete a full revolution
Known failure patterns
- raceway spalling on a shaft that was below the required 58–64 HRC hardness
- edge loading and needle skewing under shaft misalignment or deflection
- cage wear or fracture from sustained operation near the limiting speed
Selection pitfalls — read before you substitute
- With no suffix letters, HK4516 is the base caged execution: when replacing a branded equivalent, confirm the boundary dimensions 45×52×16 mm match exactly — suffix conventions for cage and shell variants differ between makers.
- The 16 mm standard width of HK4516 is the general-purpose section at 45 mm shaft; wider HK variants in the same 45×52 mm envelope carry more load and are not interchangeable if the housing width is fixed.
- The open ends of HK4516 retain no lubricant: grease must be supplied by the housing arrangement, and adjacent seals are needed in dirty or washdown duty.
- The press-fit of HK4516 at 45 mm shaft size must be done in one smooth stroke: stopping mid-way or driving at an angle leaves the cup cocked and the load on one roller row.
Frequently asked questions
What does Fw mean on a HK4516 drawn-cup bearing?
Fw is the under-roller diameter — the diameter of the shaft journal on which the needle rollers run directly. For HK4516, Fw = 45 mm, so the shaft must be machined to 45 mm, hardened to 58–64 HRC and ground, unless a separate IR inner ring is fitted.
Can a HK4516 needle roller bearing carry axial load?
No. Drawn-cup needle roller bearings like HK4516 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 HK4516 need a hardened shaft?
Either the 45 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 (IR40x45x17) so a standard unhardened shaft can be used.
What are the dimensions of a HK4516 needle roller bearing?
A HK4516 drawn-cup needle roller bearing has a 45 mm shaft diameter (Fw, under-roller diameter), 52 mm outside diameter and 16 mm width, per ISO 3245 boundary dimensions. It has no inner ring — the shaft journal serves as the raceway.
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.