61912 bearing: complete specifications & equivalents
The 61912 is a ISO 15 radial bearing sized 60 x 85 x 13 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 | 85 mm |
| Width B | 13 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 | 16.5 kN |
| Basic static load rating C0 | 12 kN |
| Fatigue load limit Pu | 0.6 kN |
| Reference speed (thermal) | 16000 rpm |
| Limiting speed (mechanical) | 10000 rpm |
| Operating temperature | -40 to +150 °C |
| Mass | 200 g |
| Manufacturer designation | SKF 61912 |
| 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 & 61900-series range
| Bore d | 2.362 in |
|---|---|
| Outer diameter D | 3.346 in |
| Width B | 0.512 in |
| ISO bore code | 12 |
| Radial section height (D−d)/2 | 12.5 mm |
| Smallest bore in 61900-series | 3 mm |
| Largest outer diameter in 61900-series | 1120 mm |
| Width range across 61900-series | 3–118 mm |
| Bore position in 61900-series (smallest first) | 20 of 63 |
| Bore above smallest 61900-series size | 57 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 61912-2RS-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 60×85×13 mm envelope per ISO 15; seal variant (OPEN vs 2RS) and load ratings differ — confirm sealing and rating before substituting. |
| 61912-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 60×85×13 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application before substituting. |
| 61912-RSR-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 60×85×13 mm envelope per ISO 15; seal variant (OPEN vs RSR) and load ratings differ — confirm sealing and rating before substituting. |
| 61912-ZZ | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 60×85×13 mm envelope per ISO 15; seal variant (OPEN vs ZZ) and load ratings differ — confirm sealing and rating before substituting. |
| 61912-2RS-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 60×85×13 mm envelope per ISO 15; seal variant (OPEN vs 2RS) and load ratings differ — confirm sealing and rating before substituting. |
| 61912-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 60×85×13 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application before substituting. |
| 61912-RSR-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 60×85×13 mm envelope per ISO 15; seal variant (OPEN vs RSR) and load ratings differ — confirm sealing and rating before substituting. |
| 61912-ZZ-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 60×85×13 mm envelope per ISO 15; seal variant (OPEN vs ZZ) and load ratings differ — confirm sealing and rating 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 61912 model number is decoded
In the 61900-series (diameter series 9 of ISO 15) the last two digits encode the bore: 61912 carries bore code 12 = 60 mm. Outside diameter 85 mm and width 13 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
- packaging machinery
- space-constrained gearboxes
- clutch and transmission assemblies
- robotics and automation joints
Known failure patterns
- contamination wear from dust and dirt ingress through the open arrangement
- lubricant starvation when no regreasing interval is maintained
- fretting corrosion on a loose shaft seat
- cage damage from operation beyond the limiting speed
Selection pitfalls — read before you substitute
- At 60 mm bore, induction heating to roughly 80–100 °C is the clean mounting method; never exceed 120 °C, and hold 61912 against the shaft shoulder while it cools so the ring cannot creep back.
- The 619xx thin section (12.5 mm section height at 60 mm bore) trades load capacity for compactness; stiff, accurately aligned seats are essential or edge loading will spall the raceway early.
- The open 61912 has no lubricant retention: grease escapes and contaminants migrate straight into the 60×85×13 mm raceway, so specify a sealed arrangement for dusty or washdown duty.
- Storage matters for open bearings: 61912 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.
- Never mix components between two 61912 units: rings, cage and balls are factory-matched and are not field-interchangeable, even between identical designations.
- Measure the shaft, do not trust the drawing: a 60 mm nominal journal worn by even 0.02 mm turns an interference seat into a creeping fit that frets the bore of 61912.
- The open 61912 needs external sealing and application-supplied lubrication; in the SKF catalogue the protected variants are separate order numbers 61912-2Z (shields) and 61912-2RSH (contact seals), not suffix-free 61912.
- The 16.5/12 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 61912 bearing?
A 61912 deep-groove ball bearing has a 60 mm bore, 85 mm outer diameter and 13 mm width (2.362 × 3.346 × 0.512 in), per ISO 15 boundary dimensions. It is an open bearing with no seals or shields.
How should 61912 be mounted?
Apply the mounting force to the ring being fitted: on a 60 mm shaft seat the press load must pass through the inner-ring face only. Induction heating of the inner ring (max 120 °C) is the clean method at this size. Never strike the outer ring, the cage or the seals.
What lubrication does 61912 need?
The open 61912 is lubricated by the application; a NLGI 2 lithium-soap grease filled to roughly 25–35% of the free volume is the common choice, with a defined relubrication interval.
How does the 61912 bore code work?
The last two digits of 61912 are bore code 12, giving 12 × 5 = 60 mm bore. The 85 mm outside diameter and 13 mm width follow the ISO 15 diameter series, not the bore code alone.
What is the SKF designation and catalogue data for 61912?
In the SKF Rolling Bearings catalogue this size is listed as 61912 — the open (unsealed) execution, 60×85×13 mm per ISO 15. Quoted values: C 16.5 kN, C0 12 kN, Pu 0.6 kN, limiting speed 10000 r/min, mass 200 g. Brand suffixes (2Z, 2RSH, 2RSL) differ from the industry-neutral spelling 61912.
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.