6407 bearing: complete specifications & equivalents
The 6407 is a ISO 15 radial bearing sized 35 x 100 x 25 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 35 mm |
| Outer diameter D | 100 mm |
| Width B | 25 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 | 55.3 kN |
| Basic static load rating C0 | 31 kN |
| Fatigue load limit Pu | 1.29 kN |
| Reference speed (thermal) | 16000 rpm |
| Limiting speed (mechanical) | 10000 rpm |
| Operating temperature | -40 to +150 °C |
| Mass | 970 g |
| Manufacturer designation | SKF 6407 |
| 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 | 1.378 in |
|---|---|
| Outer diameter D | 3.937 in |
| Width B | 0.984 in |
| ISO bore code | 07 |
| Radial section height (D−d)/2 | 32.5 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) | 8 of 21 |
| Bore above smallest 6400-series size | 25 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 6407-FAG | FAG | 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. |
| 6407-2RS | GENERIC-ISO | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 35×100×25 mm envelope per ISO 15; seal variant differs (OPEN vs 2RS) — confirm sealing suits the duty. |
| 6407-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. |
| 6407-ZZ | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 35×100×25 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 6407 model number is decoded
In the 6400-series (diameter series 4 of ISO 15) the last two digits encode the bore: 6407 carries bore code 07 = 35 mm. Outside diameter 100 mm and width 25 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 35 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
- conveyors and drives
- agricultural equipment
- fans and blowers
- electric motors
Known failure patterns
- contamination wear from dust and dirt ingress through the open arrangement
- lubricant starvation when no regreasing interval is maintained
- cage damage from operation beyond the limiting speed
- electrical pitting in VFD-driven motors without grounding protection
Selection pitfalls — read before you substitute
- Sizes around 35 mm bore are normally pressed on cold with a sleeve against the inner-ring face; the press force must never route through the outer ring or the balls of 6407.
- The 64xx heavy section at 35 mm bore (100 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.
- Storage matters for open bearings: 6407 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.
- Open bearings tolerate the highest speeds in the 6400-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 6407 units.
- Never mix components between two 6407 units: rings, cage and balls are factory-matched and are not field-interchangeable, even between identical designations.
- Axial location must clamp the ring face, not the seal area: a shoulder or circlip bearing on the seal side of the 25 mm-wide ring of 6407 drags the lip and overheats it.
- The open 6407 needs external sealing and application-supplied lubrication; in the SKF catalogue the protected variants are separate order numbers 6407-2Z (shields) and 6407-2RSH (contact seals), not suffix-free 6407.
- The 55.3/31 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 6407 bearing?
A 6407 deep-groove ball bearing has a 35 mm bore, 100 mm outer diameter and 25 mm width (1.378 × 3.937 × 0.984 in), per ISO 15 boundary dimensions. It is an open bearing with no seals or shields.
What does no suffix on 6407 mean?
A bare 6407 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication.
How does the 6400 compare with other series at the same 35 mm bore?
The '4' is the heavy diameter series: 100×25 mm, 32.5 mm radial section at 35 mm bore — the highest-capacity single-row 6xx option here, aimed at lower-speed, high-load shafts.
Are 6407 bearings from different brands interchangeable?
For boundary dimensions, yes: every brand's 6407 uses the same ISO 15 envelope (35×100×25 mm). Load ratings, limiting speeds, clearance, precision class and sealing design can differ, so verify those in the supplier catalogue when substituting.
What is the SKF designation and catalogue data for 6407?
In the SKF Rolling Bearings catalogue this size is listed as 6407 — the open (unsealed) execution, 35×100×25 mm per ISO 15. Quoted values: C 55.3 kN, C0 31 kN, Pu 1.29 kN, limiting speed 10000 r/min, mass 970 g. Brand suffixes (2Z, 2RSH, 2RSL) differ from the industry-neutral spelling 6407.
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.