6412 bearing: complete specifications & equivalents
The 6412 is a ISO 15 radial bearing sized 60 x 150 x 35 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 60 mm |
| Outer diameter D | 150 mm |
| Width B | 35 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN / C3 available |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 108 kN |
| Basic static load rating C0 | 69.5 kN |
| Fatigue load limit Pu | 2.9 kN |
| Reference speed (thermal) | 10000 rpm |
| Limiting speed (mechanical) | 6300 rpm |
| Operating temperature | -40 to +150 °C |
| Mass | 2850 g |
| Manufacturer designation | SKF 6412 |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018) |
| Last verified | 2026-09-25 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018)) · extracted 2026-09-24
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018)); SKF® and SKF Explorer® are trademarks of AB SKF, used here for identification only — mpnbase is not an authorized SKF distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at skf.com.
Dimensions in inches & 6400-series range
| Bore d | 2.362 in |
|---|---|
| Outer diameter D | 5.906 in |
| Width B | 1.378 in |
| ISO bore code | 12 |
| Radial section height (D−d)/2 | 45 mm |
| Smallest bore in 6400-series | 10 mm |
| Largest outer diameter in 6400-series | 250 mm |
| Width range across 6400-series | 12–58 mm |
| Bore position in 6400-series (smallest first) | 13 of 21 |
| Bore above smallest 6400-series size | 50 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 6412-2RS | GENERIC-ISO | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 60×150×35 mm envelope per ISO 15; seal variant differs (OPEN vs 2RS) — confirm sealing suits the duty. |
| 6412-NTN | NTN | full Dimensions and internal design equivalent — standard interchange. | Identical ISO 15 envelope, seal and ratings band — standard interchange; re-verify precision class and clearance per supplier. |
| 6412-ZZ | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 60×150×35 mm envelope per ISO 15; seal variant differs (OPEN vs ZZ) — confirm sealing suits the duty. |
Interchange levels: full standard interchange · partial verify parameters · verify manual confirmation required. Links resolve to the equivalent model's specification page where available.
How the 6412 model number is decoded
In the 6400-series (diameter series 4 of ISO 15) the last two digits encode the bore: 6412 carries bore code 12 = 60 mm. Outside diameter 150 mm and width 35 mm come from the ISO 15 boundary-dimensions general plan. With no seal suffix the bearing is open: no shields or seals are fitted and lubrication is supplied by the application. For normal-load mounting with a rotating inner ring on a 60 mm shaft, typical catalogue practice is a k5 shaft seat with an H7 housing bore — verify against the actual load direction and magnitude. In the SKF catalogue this open execution carries the bare designation; protected variants are ordered separately as -2Z and -2RSH.
Typical equipment & failure modes
Common applications
- centrifugal and positive-displacement pumps
- gearboxes and speed reducers
- conveyor drives
- material-handling equipment
Known failure patterns
- contamination wear from dust and dirt ingress through the open arrangement
- lubricant starvation when no regreasing interval is maintained
- false brinelling from vibration while the shaft is stationary
- fretting corrosion on a loose shaft seat
Selection pitfalls — read before you substitute
- Temperature rise and interference fits consume internal clearance on this 60 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 6412 with C3 for those conditions.
- The 64xx heavy section at 60 mm bore (150 mm OD) is built for high-load, lower-speed duty; specifying it in a high-rpm motor gives excess heat and short grease life — use 62/63 there.
- The open 6412 has no lubricant retention: grease escapes and contaminants migrate straight into the 60×150×35 mm raceway, so specify a sealed arrangement for dusty or washdown duty.
- Storage matters for open bearings: 6412 leaves the factory with rust preventive only, so clean it and apply the service grease at assembly even if the rings look oily from the wrapper.
- Axial location must clamp the ring face, not the seal area: a shoulder or circlip bearing on the seal side of the 35 mm-wide ring of 6412 drags the lip and overheats it.
- A 60 mm bore listing showing the right d/D/B but no standard or precision-class reference may be a loose-tolerance import; measure bore/OD spread before fitting it to a machined shaft.
- The open 6412 needs external sealing and application-supplied lubrication; in the SKF catalogue the protected variants are separate order numbers 6412-2Z (shields) and 6412-2RSH (contact seals), not suffix-free 6412.
- The 108/69.5 kN ratings here are SKF Explorer-class figures from catalogue PUB BU/P1 17000/1 EN (Oct 2018); SKF can revise internal geometry and ratings without changing the designation, so treat the catalogue version and date as part of the specification and re-verify for critical drives.
Frequently asked questions
What are the dimensions of a 6412 bearing?
A 6412 deep-groove ball bearing has a 60 mm bore, 150 mm outer diameter and 35 mm width (2.362 × 5.906 × 1.378 in), per ISO 15 boundary dimensions. It is an open bearing with no seals or shields.
How does the 6400 compare with other series at the same 60 mm bore?
The '4' is the heavy diameter series: 150×35 mm, 45.0 mm radial section at 60 mm bore — the highest-capacity single-row 6xx option here, aimed at lower-speed, high-load shafts.
Are 6412 bearings from different brands interchangeable?
For boundary dimensions, yes: every brand's 6412 uses the same ISO 15 envelope (60×150×35 mm). Load ratings, limiting speeds, clearance, precision class and sealing design can differ, so verify those in the supplier catalogue when substituting.
What internal clearance does 6412 have?
Unless a clearance suffix says otherwise, 6412 is manufactured to normal (CN) radial internal clearance. Tight fits and hot shafts consume clearance in service — for those conditions order the C3 execution of 6412 and verify the residual clearance after mounting.
What is the SKF designation and catalogue data for 6412?
In the SKF Rolling Bearings catalogue this size is listed as 6412 — the open (unsealed) execution, 60×150×35 mm per ISO 15. Quoted values: C 108 kN, C0 69.5 kN, Pu 2.9 kN, limiting speed 6300 r/min, mass 2850 g. Brand suffixes (2Z, 2RSH, 2RSL) differ from the industry-neutral spelling 6412.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018) on 2026-09-25. Read our editorial & correction policy.