32313 bearing: complete specifications & equivalents
The 32313 is a ISO 355 radial bearing sized 65 x 140 x 51 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Bore diameter d | 65 mm |
| Outer diameter D | 140 mm |
| Width B | 51 mm |
| Seal / shield | open |
| Internal clearance | CN available |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Operating temperature | -30 to +120 °C |
| Mass (geometry estimate) | 3142 g |
| Standard | ISO 355 |
| Catalog version | iso355-geometry |
| Last verified | 2026-09-24 |
Source: ISO 15 boundary-dimensions standard · extracted 2026-09-24
Standard-interchange bearing: dimensions per ISO 15; CN clearance, P0 tolerance and a stamped-steel cage are catalogue defaults unless the supplier states otherwise, and mass is a geometry-derived estimate. Brand catalogue load ratings and limiting speeds for 32313 are being backfilled — use the inquiry form for certified values.
Dimensions in inches & 32300-series range
| Bore d | 2.559 in |
|---|---|
| Outer diameter D | 5.512 in |
| Width B | 2.008 in |
| ISO bore code | 13 |
| Radial section height (D−d)/2 | 37.5 mm |
| Smallest bore in 32300-series | 20 mm |
| Largest outer diameter in 32300-series | 240 mm |
| Width range across 32300-series | 22.25–84.5 mm |
| Bore position in 32300-series (smallest first) | 10 of 19 |
| Bore above smallest 32300-series size | 45 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32313 | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 15 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 32313 model number is decoded
In the 32300-series the last two digits of 32313 encode the bore: code 13 = 65 mm (code × 5 from 04 upward). The ISO 355 envelope is 140 mm outside diameter and 51 mm total assembly width T over the separable cone and cup — 2.559 × 5.512 × 2.008 in, with a 37.5 mm radial section height. Tapered rollers carry combined radial and single-direction axial load; bidirectional thrust needs an opposed pair (X face-to-face or O back-to-back) adjusted at fit-up. With a rotating cone on a 65 mm shaft, typical catalogue practice is a k5 shaft seat with an H7 housing bore, EP lubrication and a defined end-play setting — verify against the load direction and magnitude.
Typical equipment & failure modes
Common applications
- final-drive pinion and differential bearings
- commercial gearbox input/output shafts
- conveyor head and tail pulleys
- fork-lift steer axles
- industrial transmission shafts
Known failure patterns
- fretting corrosion on a loose shaft seat when the cone is pressed to an interference that relaxes with wear
- cup creep and housing bore fretting when the outer ring is left without its specified press fit
- roller large-end smearing and scoring against the inner-ring guide rib from loss of the EP lubricant film
- raceway spalling at the roller-rib junction after the L10 life or sustained axial overload
- over-preload heat: a shim stack cut too thin drives contact stress up and seizes the cone on the seat
Selection pitfalls — read before you substitute
- On this 65 mm-bore 32313, thermal growth of the shaft closes up the adjusted clearance; set cold end play around 0.03–0.12 mm and recheck after the first hot run — a medium-series cone that was correct cold on the 65 mm seat can seize hot.
- The 323 heavy wide series at 65 mm bore (140×51 mm) is a steep-angle, high-thrust row for heavy final drives; its 37.5 mm section and 51 mm width dwarf the 30213, and its speed ceiling is the lowest of the four series.
- Before fitting 32313, machine the 65 mm shaft seat and 140 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 51 mm-wide cone and cup only load correctly when the full faces abut, and a large radius pinches the 37.5 mm radial section.
- The 32313 cup drives into the 140 mm housing bore with a sleeve against its outer face only; pressure on the inner ring or cage transfers through the rollers and leaves indentations that become spalls within the 51 mm load zone.
- Inspect the removed 32313 cone and cup as a pair: pitting on the 140 mm cup with a clean cone usually means seal failure and water ingress, while rib scoring on the 65 mm cone points to wrong preload or lost EP film — the two faults need different corrections.
- A single 32313 takes thrust in ONE direction — the rollers roll toward the rib under load, so reverse thrust unloads the contact. For a wheel or pinion use an opposing 323-series pair adjusted against each other.
- The cone and the cup of 32313 are separable: order and fit them as a matched set; never mix a cone from one manufacturer with another brand's cup — roller geometry and contact angle are not identical across brands.
Frequently asked questions
What are the dimensions of a 32313 tapered roller bearing?
A 32313 single-row metric tapered roller bearing per ISO 355 has a 65 mm bore, 140 mm outer diameter and 51 mm total assembly width (2.559 × 5.512 × 2.008 in), a 37.5 mm radial section and roughly 3142 g geometry-based estimated mass; catalogue masses vary with roller and cage design.
How does the 32313 bore code work?
The last two digits of 32313 are bore code 13, giving 13 × 5 = 65 mm bore — the same convention as 6xx ball bearings, starting at code 04 (20 mm). The 140 mm OD and 51 mm width come from the ISO 355 diameter and width series, not the bore code alone.
What is the cone and cup of 32313?
Tapered roller bearings are separable: the cone is the inner ring with the tapered rollers and cage, the cup is the outer ring. 32313 denotes a matched cone-and-cup set. They are fitted separately — cone pressed on the shaft, cup in the housing — and adjusted against each other.
How is the preload or clearance of 32313 set?
At fit-up the 65 mm-bore cone is tightened against the cup while the hub is rotated, seated, then backed off to the specified end play — a typical starting range of 0.03–0.12 mm for a 65 mm bore — and locked with shims, a locknut or a spacer. Too tight overheats and seizes the rib; too loose causes skid, noise and early wear. Confirm the exact figure in the hub or axle-maker procedure.
Can 32313 take axial load in both directions?
A single 32313 takes thrust in one direction only — the roller large ends bear against the inner-ring rib under load. Bidirectional axial load requires an opposed pair: X (face-to-face) tolerates misalignment slightly better, O (back-to-back) gives a wider load centre and more moment stiffness.
Reviewed & verified by the MPN Base engineering desk against source catalog iso355-geometry on 2026-09-24. Read our editorial & correction policy.