HK3512CV2 bearing: complete specifications & equivalents
The HK3512CV2 is a ISO 3245 radial bearing sized 35 x 42 x 12 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 35 mm |
| Outer diameter D | 42 mm |
| Width B | 12 mm |
| Seal / shield | open |
| Basic dynamic load rating C | 13.3 kN |
| Basic static load rating C0 | 21.3 kN |
| Fatigue load limit Pu | 2.6 kN |
| Limiting speed (mechanical) | 4700 rpm |
| Mass | 28 g |
| Manufacturer designation | HK3512CV2 |
| 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 | 1.378 in |
|---|---|
| Outer diameter D | 1.654 in |
| Width B | 0.472 in |
| ISO bore code | — |
| 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) | 21 of 24 |
| Bore above smallest HK-series size | 32 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the HK3512CV2 model number is decoded
The NTN HK3512CV2 — an open-end drawn-cup needle roller bearing — sits in the HK-series under ISO 3245 boundary dimensions.Reading the size code: 35 mm is Fw, the under-roller (shaft journal) diameter; 42 mm and 12 mm are the cup outside diameter and width respectively. 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 trailing code letters mark a production-variant shell or cage execution; the boundary dimensions match the base HK size, so interchange checks should rely on the printed Fw/D/C values. In this class the limiting factor is rarely the rating table — a poorly supported or out-of-round seat will end the bearing long before fatigue does. Agricultural PTO shafts and small tractor linkages use this size at the pivot points: the cup is pressed into a welded eye and forgotten until the implement is overhauled. Mounting this size in a split housing needs the cup pressed into one half only, with the joint face relieved so the shell is not pinched when the case bolts come up to torque.
Typical equipment & failure modes
Common applications
- heavy gearbox and final drive shafts
- construction equipment swing pivots
- printing press cylinder journals
- 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
- Pressing HK3512CV2 (35 mm shaft) home needs real force: keep the cup square with a guided mandrel, because a tilted cup overloads the roller row nearest the shoulder.
- HK3512CV2 carries a maker-specific variant code after the size: when substituting another brand, match the printed 35×42×12 mm boundary dimensions and load ratings rather than the suffix letters, which are not standardized across makers.
- The 12 mm standard width of HK3512CV2 is the general-purpose section at 35 mm shaft; wider HK variants in the same 35×42 mm envelope carry more load and are not interchangeable if the housing width is fixed.
- Needle rollers tolerate almost no misalignment; if the 42 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.
Frequently asked questions
What are the dimensions of a HK3512CV2 needle roller bearing?
A HK3512CV2 drawn-cup needle roller bearing has a 35 mm shaft diameter (Fw, under-roller diameter), 42 mm outside diameter and 12 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 HK3512CV2 drawn-cup bearing?
Fw is the under-roller diameter — the diameter of the shaft journal on which the needle rollers run directly. For HK3512CV2, Fw = 35 mm, so the shaft must be machined to 35 mm, hardened to 58–64 HRC and ground, unless a separate IR inner ring is fitted.
Can a HK3512CV2 needle roller bearing carry axial load?
No. Drawn-cup needle roller bearings like HK3512CV2 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 HK3512CV2 retained in the housing?
The thin-walled drawn cup of HK3512CV2 is press-fitted into a 42 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 HK3512CV2 drawn-cup bearing?
HK3512CV2 is typically specified for dirty environments where the open ends rely entirely on the housing seals; match the grease/oil speed limits (4700/7000 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.