32936 bearing: complete specifications & equivalents
The 32936 is a ISO 355 radial bearing sized 180 x 250 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 | 180 mm |
| Outer diameter D | 250 mm |
| Width B | 45 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 435 kN |
| Basic static load rating C0 | 735 kN |
| Fatigue load limit Pu | 68 kN |
| Reference speed (thermal) | 1900 rpm |
| Limiting speed (mechanical) | 2200 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 6650 g |
| Manufacturer designation | SKF 32936 |
| Standard | ISO 355 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.1 metric single-row TRB |
| Last verified | 2026-09-28 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.1 metric 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. 8.1 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 & 32900-series range
| Bore d | 7.087 in |
|---|---|
| Outer diameter D | 9.843 in |
| Width B | 1.772 in |
| ISO bore code | 36 |
| Radial section height (D−d)/2 | 35 mm |
| Smallest bore in 32900-series | 35 mm |
| Largest outer diameter in 32900-series | 600 mm |
| Width range across 32900-series | 14–100 mm |
| Bore position in 32900-series (smallest first) | 23 of 37 |
| Bore above smallest 32900-series size | 145 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32936 | 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 32936 model number is decoded
Ordering number SKF 32936 in SKF catalogue PUB BU/P1 17000 denotes a single-row tapered roller bearing for a 180 mm shaft, very-light thin section, with an open pressed-steel-cage execution and one-direction axial capacity.On the SKF nameplate, 32936 follows the ISO 355 convention: 3 for the tapered-roller type, 29 for the very-light thin section, final digits 36 for the 180 mm bore. The SKF catalogue adds the ISO 355 dimension-series code after the bare number (e.g. 4DC); it is the dimensional series, not a separate part number. Selection arithmetic: the C0/C ratio is about 1.69 (static 735 kN against dynamic 435 kN), typical of a tapered roller sized for axial capacity, and the 68 kN fatigue load limit Pu is the equivalent-load floor used in the life calculation. Note the minimum-axial-load requirement: at light radial load and high speed the rollers of 32936 must still be held into the rib contact, which is another reason the catalogue recommends paired mounting with controlled setting. Material and manufacturing detail: the 6650 g catalogue mass reflects through-hardened bearing steel (density ~7.85 g/cm³) machined to the 32900 ISO envelope, with the pressed-steel cage contributing roughly 200 g of the total; the 180 mm bore is ground to IT5 roundness and the 250 mm OD to IT5 cylindricity, and the 45 mm width tolerance keeps the pair-setting scatter within the ISO preload class.
Typical equipment & failure modes
Common applications
- heavy-duty rolling-mill gearboxes
- large crusher and mineral-processing drives
- wind-turbine main shafts
- marine propulsion gearboxes
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
- preload loss as the mounted pair relaxes, letting rollers skid and smear the raceways
- axial overload spalling at the roller-rib contact beyond the single-row thrust rating
- pressed-steel cage wear or fracture after prolonged running above the limiting speed
- hard-particle indentation of the tapered raceway in unfiltered oil
Selection pitfalls — read before you substitute
- At 180 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 329 series at 180 mm bore (250×45 mm) is the very-light thin-section envelope: the smallest OD of any tapered family at this bore, ideal where radial space is severely limited, but capacity is well below a 30236 of the same bore — confirm the L10 life and minimum axial load before choosing it.
- A single 32936 cannot locate the shaft axially in both directions; mounting it singly on a reversing-thrust shaft leaves one direction uncontrolled — always use an O or X matched pair for bidirectional location.
- Setting is a design value, not an assembly feel: excessive preload in the 32936 pair raises operating temperature and can trigger thermal runaway, while too little lets the rollers skid and smear the raceway under light load.
- The 6650 g mass and 45 mm width mean spacer and abutment faces must be square to the axis within the bearing's own P0 tolerance; a tilted spacer tilts the contact angle and concentrates load on one rib of 32936.
- The 435/735 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 32936 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 32936 designation when purchasing and match the execution to the mounting arrangement.
Frequently asked questions
What are the dimensions and catalogue data of 32936?
The SKF 32936 is a single-row tapered roller bearing with 180 mm bore, 250 mm outer diameter and 45 mm width (7.087 × 9.843 × 1.772 in) per ISO 355. From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 435 kN, C0 735 kN, fatigue load limit Pu 68 kN, reference speed 1,900 r/min, limiting speed 2,200 r/min, mass about 6650 g. It is an open, separable bearing with a pressed-steel cage.
How does the 32936 bore code work?
The last two digits of 32936 are bore code 36, so 36 × 5 = 180 mm bore. The 250 mm OD and 45 mm width come from the ISO 355 dimension-series plan, shared with other tapered bearings of the same code.
What do the 32936 series and basic execution designations mean?
The leading 3 marks a single-row tapered roller bearing; the second digit 29 is the ISO 355 series (very-light thin 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 32936 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 32936 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 32936 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 2026-09-28. Read our editorial & correction policy.