61852 bearing: complete specifications & equivalents
The 61852 is a ISO 15 radial bearing sized 260 x 320 x 28 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 260 mm |
| Outer diameter D | 320 mm |
| Width B | 28 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 | 111 kN |
| Basic static load rating C0 | 163 kN |
| Fatigue load limit Pu | 4 kN |
| Reference speed (thermal) | 3800 rpm |
| Limiting speed (mechanical) | 2400 rpm |
| Operating temperature | -40 to +150 °C |
| Mass | 4150 g |
| Manufacturer designation | SKF 61852 |
| 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 & 61800-series range
| Bore d | 10.236 in |
|---|---|
| Outer diameter D | 12.598 in |
| Width B | 1.102 in |
| ISO bore code | 52 |
| Radial section height (D−d)/2 | 30 mm |
| Smallest bore in 61800-series | 1 mm |
| Largest outer diameter in 61800-series | 1820 mm |
| Width range across 61800-series | 1–140 mm |
| Bore position in 61800-series (smallest first) | 45 of 74 |
| Bore above smallest 61800-series size | 259 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 61852-FAG | FAG | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 260×320×28 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application before substituting. |
| 61852 | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier. |
| 61852-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 260×320×28 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 61852 model number is decoded
In the 61800-series (diameter series 8 of ISO 15) the last two digits encode the bore: 61852 carries bore code 52 = 260 mm. Outside diameter 320 mm and width 28 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 260 mm shaft, typical catalogue practice is a m6 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
- space-constrained gearboxes
- clutch and transmission assemblies
- robotics and automation joints
- lay shafts and idler shafts
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
- Mount this 260 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.
- Only 30.0 mm of radial section separates bore and OD on the 618xx series at 260 mm: ring flex from clamping or an oval housing bore transfers straight into raceway stress, so seat roundness matters more here than on a 6252.
- The open 61852 has no lubricant retention: grease escapes and contaminants migrate straight into the 260×320×28 mm raceway, so specify a sealed arrangement for dusty or washdown duty.
- Open bearings tolerate the highest speeds in the 61800-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 61852 units.
- Measure the shaft, do not trust the drawing: a 260 mm nominal journal worn by even 0.02 mm turns an interference seat into a creeping fit that frets the bore of 61852.
- Assign fits by which ring rotates: an interference shaft fit for a rotating inner ring; if the outer ring rotates instead, reverse the logic — a loose rotating ring creeps and frets its seat.
- The open 61852 needs external sealing and application-supplied lubrication; in the SKF catalogue the protected variants are separate order numbers 61852-2Z (shields) and 61852-2RSH (contact seals), not suffix-free 61852.
- The 111/163 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 61852 bearing?
A 61852 deep-groove ball bearing has a 260 mm bore, 320 mm outer diameter and 28 mm width (10.236 × 12.598 × 1.102 in), per ISO 15 boundary dimensions. It is an open bearing with no seals or shields.
Are 61852 bearings from different brands interchangeable?
For boundary dimensions, yes: every brand's 61852 uses the same ISO 15 envelope (260×320×28 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 61852 have?
Unless a clearance suffix says otherwise, 61852 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 61852 and verify the residual clearance after mounting.
How should 61852 be mounted?
Apply the mounting force to the ring being fitted: on a 260 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 is the SKF designation and catalogue data for 61852?
In the SKF Rolling Bearings catalogue this size is listed as 61852 — the open (unsealed) execution, 260×320×28 mm per ISO 15. Quoted values: C 111 kN, C0 163 kN, Pu 4 kN, limiting speed 2400 r/min, mass 4150 g. Brand suffixes (2Z, 2RSH, 2RSL) differ from the industry-neutral spelling 61852.
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.