67985-67920 bearing: complete specifications & equivalents
The 67985-67920 is a ISO 355 radial bearing sized 206.375 x 282.575 x 46.038 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 206.375 mm |
| Outer diameter D | 282.575 mm |
| Width B | 46.038 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 465 kN |
| Basic static load rating C0 | 830 kN |
| Fatigue load limit Pu | 76.5 kN |
| Reference speed (thermal) | 1600 rpm |
| Limiting speed (mechanical) | 2000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 8450 g |
| Manufacturer designation | SKF 67985/67920 |
| Standard | ISO 355 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.2 inch single-row TRB |
| Last verified | 2026-09-28 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.2 inch single-row TRB) · extracted 2026-09-28
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.2 inch single-row TRB); 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 & 67900-series range
| Bore d | 8.125 in |
|---|---|
| Outer diameter D | 11.125 in |
| Width B | 1.813 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 38.1 mm |
| Smallest bore in 67900-series | 198.298 mm |
| Largest outer diameter in 67900-series | 282.575 mm |
| Width range across 67900-series | 46.038–46.038 mm |
| Bore position in 67900-series (smallest first) | 4 of 4 |
| Bore above smallest 67900-series size | 8.076999999999998 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 67985-67920 | Timken | full Dimensions and internal design equivalent — standard interchange. | Same inch-series cone/cup boundary envelope (d/D/T); load ratings and speed limits are brand-specific and may differ. |
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 67985-67920 model number is decoded
Mounting practice for 67985: the rotating cone takes the interference fit (m6 on a 206.375 mm shaft), the cup slides for axial location, and reversing-thrust duty demands a paired O/X set rather than one bearing. Journal and housing interface: the 206.375 mm bore takes a m6 shaft seat (upper deviation ~0.413 mm for this diameter range) and the 282.575 mm outside diameter pairs with an H7 housing bore tolerance band of 282.575.000/282.595 mm; the 46.038 mm width defines the shoulder depth, and the 8450 g cone-plus-cup assembly is the dead load on the shaft during thermal expansion calculations. Within the 67900-series tables, 67985 appears in several rows because SKF lists multiple cup options for the same cone. 67985 is the 67920 variant, with 282.575 mm OD and 46.038 mm width; neighbouring rows on the same cone differ only in the cup but are separate orderable bearings.Ordering number SKF 67985/67920 in SKF catalogue PUB BU/P1 17000 denotes a single-row tapered roller bearing for a 206.375 mm shaft, inch series, with an open pressed-steel-cage execution and one-direction axial capacity.Numbering ties the bearing to its inch-series envelope: 67985 means a cone and cup matched pair in the 67900-series series — which is why the 206.375×282.575×46.038 mm outline swaps dimensionally with other inch-series bearings of the same code. SKF lists the plain number as the basic execution; letter suffixes such as B denote a steeper contact angle and are different order numbers. Selection arithmetic: the C0/C ratio is about 1.78 (static 830 kN against dynamic 465 kN), typical of a tapered roller sized for axial capacity, and the 76.5 kN fatigue load limit Pu is the equivalent-load floor used in the life calculation.
Typical equipment & failure modes
Common applications
- marine propulsion gearboxes
- large industrial mixer shafts
- offshore winch and drawworks drums
- large industrial mixer shafts
Known failure patterns
- cup or cone misalignment when the separable rings are not seated square during mounting
- loose cup rotation in the housing when the specified press fit is not achieved
- roller large-end smearing against the cone rib after EP lubricant film failure
- roller large-end smearing against the cone rib after EP lubricant film failure
- cage pocket scoring when the bearing starts cold with grease of too-high base-oil viscosity
- mounting score marks when the cone is cocked over the shaft keyway or a burr
Selection pitfalls — read before you substitute
- At 206.375 mm bore the cone mass is high enough that cocking during mounting damages the cage and rib; guide the ring square, confirm seat contact around the full circumference, and re-check setting after the first thermal cycle of the paired set.
- The 67900-series inch series at 206.375 mm bore (282.575×46.038 mm) follows the Timken cone/cup convention; substitutions must match both the cone and cup reference exactly — interchanging with another series or a metric 3xxxx bearing of the same bore changes OD, width and contact angle, so re-run the pair setting and shoulder-diameter checks before swapping.
- Setting is a design value, not an assembly feel: excessive preload in the 67985 pair raises operating temperature and can trigger thermal runaway, while too little lets the rollers skid and smear the raceway under light load.
- At the 465 kN rating of 67985, preload class changes stiffness by tens of percent but also heat generation; select light preload for the 2,000 r/min speed end and heavier preload only where moment stiffness dominates.
- The pressed-steel cage is rated for standard industrial service; sustained running above the limiting speed or with degraded lubricant wears the cage pockets — inspect the cage at every relubrication interval.
- The 465/830 kN ratings are SKF catalogue 17000 values for the basic execution; SKF can revise internal geometry without changing the order number, so keep the catalogue version (PUB BU/P1 17000/1 EN, 2018) with the specification and re-verify for critical drives.
- SKF lists several executions of 67985 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 67985/67920 designation when purchasing and match the execution to the mounting arrangement.
Frequently asked questions
How does 67985 compare with a ball bearing of the same bore?
A tapered roller bearing has line contact and a steep contact angle: much higher combined axial-plus-radial capacity and shock resistance than a ball bearing of the same bore, at the cost of speed, one-direction thrust, mandatory pairing for reversing loads and a minimum axial load requirement. A ball bearing cannot be dropped into a combined-load 67985 position and vice versa — verify load direction, Fa/Fr ratio and speed before substituting.
What shaft and housing fits suit 67985?
For a rotating shaft under normal load, seat the cone on a m6 shaft fit; the cup is usually a loose-to-transition fit in the housing so it can creep slightly and distribute wear. Chamfer and shoulder diameters must clear the bearing rings so the 46.038 mm-wide cup seats square; the mounting setting (end play or preload) is set by the axial position of the cup relative to the cone.
Is 67985 interchangeable with other brands?
Inch-series tapered roller bearings follow a long-standing industry boundary plan, so cones and cups of the same basic number are generally dimensionally interchangeable across manufacturers. However, internal geometry, cage design and load ratings differ by brand, so for paired or precision applications keep both halves of the set from one manufacturer — or re-verify ratings and setting when mixing.
What are the dimensions and catalogue data of 67985?
The SKF 67985/67920 is a single-row tapered roller bearing with 206.375 mm bore, 282.575 mm outer diameter and 46.038 mm width (8.125 × 11.125 × 1.813 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 465 kN, C0 830 kN, fatigue load limit Pu 76.5 kN, reference speed 1,600 r/min, limiting speed 2,000 r/min, mass about 8450 g. It is an open, separable bearing with a pressed-steel cage.
How does the 67985 inch-series designation work?
Inch-series tapered roller bearings use a Timken-style cone/cup convention: the number before the slash identifies the cone (inner ring with roller and cage assembly), the number after the slash identifies the cup (outer ring), and the 67900-series code marks the dimensional series. The metric dimensions 206.375×282.575×46.038 mm are the converted equivalents of the original inch boundary dimensions.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.2 inch single-row TRB on 2026-09-28. Read our editorial & correction policy.