30332 bearing: complete specifications & equivalents
The 30332 is a ISO 355 radial bearing sized 160 x 340 x 75 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 160 mm |
| Outer diameter D | 340 mm |
| Width B | 75 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 970 kN |
| Basic static load rating C0 | 1180 kN |
| Fatigue load limit Pu | 114 kN |
| Reference speed (thermal) | 1500 rpm |
| Limiting speed (mechanical) | 2000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 29000 g |
| Manufacturer designation | SKF 30332 |
| Standard | ISO 355 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.1 metric single-row TRB |
| Last verified | 2026-09-26 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.1 metric single-row TRB) · extracted 2026-09-26
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.1 metric 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 & 30300-series range
| Bore d | 6.299 in |
|---|---|
| Outer diameter D | 13.386 in |
| Width B | 2.953 in |
| ISO bore code | 32 |
| Radial section height (D−d)/2 | 90 mm |
| Smallest bore in 30300-series | 15 mm |
| Largest outer diameter in 30300-series | 500 mm |
| Width range across 30300-series | 14.25–105 mm |
| Bore position in 30300-series (smallest first) | 26 of 32 |
| Bore above smallest 30300-series size | 145 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 30332 | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 355 boundary-dimension envelope; brand-specific OEM equivalents (NSK/FAG/NTN) pending multi-source data. |
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 30332 model number is decoded
Ordering number SKF 30332 in SKF catalogue PUB BU/P1 17000 denotes a single-row tapered roller bearing for a 160 mm shaft, heavy-OD section, with an open pressed-steel-cage execution and one-direction axial capacity.Digit by digit, 30332 reads as bearing type 3 (single-row tapered roller), heavy-OD section series 03, and bore reference 32 resolving to 160 mm; 340 mm OD and 75 mm width are the matching ISO 355 boundary values. The SKF catalogue adds the ISO 355 dimension-series code after the bare number (e.g. 2GB); it is the dimensional series, not a separate part number. With C 970 kN and C0 1180 kN, the 30332 pair-sizing check is dominated by the axial share: keep the equivalent load P below the rating at the required L10, remembering one bearing alone cannot cover reversing thrust at 2,000 r/min. For a 160 mm shaft the usual cone seat is m6 with an H7 housing when the inner ring rotates; arrange two 30332 bearings as a set for two-direction location and set clearance from the load diagram, never from assembly feel.
Typical equipment & failure modes
Common applications
- marine propulsion gearboxes
- large industrial mixer shafts
- offshore winch and drawworks drums
- rolling-mill roll-neck bearings
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
- thermal preload runaway in an O-arrangement pair when inner-ring heat expands the setting
- uneven load sharing in a pair when spacer faces are not parallel to the bore
- 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 160 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 303 series at 160 mm bore (340×75 mm) carries a larger OD and higher capacity than 30232 at the same bore; the bigger section runs hotter, so re-check the 2,000 r/min speed ceiling and shoulder diameters before substituting.
- The tapered contact angle creates an induced axial load under pure radial force; include it in the 30332 rating calculation (and account for it in both bearings of a pair) or the unloaded bearing skids its rollers.
- O (back-to-back) pairs are stiffer against moments, X (face-to-face) pairs tolerate misalignment and thermal growth better; choosing the arrangement from the 2D drawing rather than the actual shaft thermal expansion is a common 30332 mounting error.
- Shaft and housing fillets must clear the bearing chamfer so the 75 mm-wide cup seats square; use an undercut or withdrawal groove rather than an oversized radius that locks on the ring face.
- The 970/1180 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 30332 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 30332 designation when purchasing and match the execution to the mounting arrangement.
Frequently asked questions
What are the dimensions and catalogue data of 30332?
The SKF 30332 is a single-row tapered roller bearing with 160 mm bore, 340 mm outer diameter and 75 mm width (6.299 × 13.386 × 2.953 in) per ISO 355. From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 970 kN, C0 1180 kN, fatigue load limit Pu 114 kN, reference speed 1,500 r/min, limiting speed 2,000 r/min, mass about 29000 g. It is an open, separable bearing with a pressed-steel cage.
How does the 30332 bore code work?
The last two digits of 30332 are bore code 32, so 32 × 5 = 160 mm bore. The 340 mm OD and 75 mm width come from the ISO 355 dimension-series plan, shared with other tapered bearings of the same code.
What do the 30332 series and basic execution designations mean?
The leading 3 marks a single-row tapered roller bearing; the second digit 03 is the ISO 355 series (heavy-OD section). The SKF catalogue lists the ISO 355 dimension-series code after the bare number. A steeper-contact-angle variant (B suffix) is a different order number and is not interchangeable with the basic execution.
Can a single 30332 take axial load in both directions?
No — one single-row tapered roller bearing reacts thrust in one direction only, and under radial load its contact angle induces an axial force. Use two bearings as a matched pair: O (back-to-back) for a rigid, moment-resisting arrangement, X (face-to-face) where thermal expansion must be tolerated, or tandem where one-direction thrust is shared.
How does 30332 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 30332 position and vice versa — verify load direction, Fa/Fr ratio and speed before substituting.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.1 metric single-row TRB on 2026-09-26. Read our editorial & correction policy.