6415 bearing: complete specifications & equivalents
The 6415 is a ISO 15 radial bearing sized 75 x 190 x 45 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 75 mm |
| Outer diameter D | 190 mm |
| Width B | 45 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 | 153 kN |
| Basic static load rating C0 | 114 kN |
| Fatigue load limit Pu | 4.15 kN |
| Reference speed (thermal) | 8000 rpm |
| Limiting speed (mechanical) | 5000 rpm |
| Operating temperature | -40 to +150 °C |
| Mass | 5800 g |
| Manufacturer designation | SKF 6415 |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018) |
| Last verified | 2026-09-24 |
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 | 2.953 in |
|---|---|
| Outer diameter D | 7.48 in |
| Width B | 1.772 in |
| ISO bore code | 15 |
| Radial section height (D−d)/2 | 57.5 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) | 16 of 21 |
| Bore above smallest 6400-series size | 65 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 6415-2RS | GENERIC-ISO | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 75×190×45 mm envelope per ISO 15; seal variant differs (OPEN vs 2RS) — confirm sealing suits the duty. |
| 6415-ZZ | GENERIC-ISO | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 75×190×45 mm envelope per ISO 15; seal variant differs (OPEN vs ZZ) — confirm sealing suits the duty. |
| 6415-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 75×190×45 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application before substituting. |
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 6415 model number is decoded
6415 is supplied open, without shields or seals, so the arrangement around it must supply and retain the lubricant. Within the heavy 64xx section (diameter series 4 of ISO 15), multiplying bore code 15 by five gives the 75 mm bore; the 190 mm outside diameter and 45 mm width follow the same boundary-dimension plan. For a rotating inner ring on a 75 mm shaft under normal load, catalogue practice seats it on a k5 shaft fit with an H7 housing bore — confirm against the actual load direction and magnitude before committing. 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
- material-handling equipment
- industrial fans
- industrial electric motors
- centrifugal and positive-displacement pumps
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 75 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 6415 with C3 for those conditions.
- The 64xx heavy section at 75 mm bore exists for high radial load at moderate rpm; its 190 mm OD and 45 mm width demand a larger housing, and grease life at motor speeds is short — treat it as a low-speed, high-load choice.
- The open 6415 has no lubricant retention: grease escapes and contaminants migrate straight into the 75×190×45 mm raceway, so specify a sealed arrangement for dusty or washdown duty.
- Storage matters for open bearings: 6415 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.
- The housing bore for the 190 mm OD should be round within IT7; an oval bore pinches the outer ring of 6415 and shows up later as two-point loaded raceway wear.
- Measure the shaft, do not trust the drawing: a 75 mm nominal journal worn by even 0.02 mm turns an interference seat into a creeping fit that frets the bore of 6415.
- The open 6415 needs external sealing and application-supplied lubrication; in the SKF catalogue the protected variants are separate order numbers 6415-2Z (shields) and 6415-2RSH (contact seals), not suffix-free 6415.
- The 153/114 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 6415 bearing?
A 6415 deep-groove ball bearing has a 75 mm bore, 190 mm outer diameter and 45 mm width (2.953 × 7.48 × 1.772 in), per ISO 15 boundary dimensions. It is an open bearing with no seals or shields.
What does no suffix on 6415 mean?
A bare 6415 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 75 mm bore?
The '4' is the heavy diameter series: 190×45 mm, 57.5 mm radial section at 75 mm bore — the highest-capacity single-row 6xx option here, aimed at lower-speed, high-load shafts.
Are 6415 bearings from different brands interchangeable?
For boundary dimensions, yes: every brand's 6415 uses the same ISO 15 envelope (75×190×45 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 6415?
In the SKF Rolling Bearings catalogue this size is listed as 6415 — the open (unsealed) execution, 75×190×45 mm per ISO 15. Quoted values: C 153 kN, C0 114 kN, Pu 4.15 kN, limiting speed 5000 r/min, mass 5800 g. Brand suffixes (2Z, 2RSH, 2RSL) differ from the industry-neutral spelling 6415.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018) on 2026-09-24. Read our editorial & correction policy.