32314 bearing: complete specifications & equivalents
The 32314 is a ISO 355 radial bearing sized 70 x 150 x 54 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Bore diameter d | 70 mm |
| Outer diameter D | 150 mm |
| Width B | 54 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) | 3809 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 32314 are being backfilled — use the inquiry form for certified values.
Dimensions in inches & 32300-series range
| Bore d | 2.756 in |
|---|---|
| Outer diameter D | 5.906 in |
| Width B | 2.126 in |
| ISO bore code | 14 |
| Radial section height (D−d)/2 | 40 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) | 11 of 19 |
| Bore above smallest 32300-series size | 50 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32314 | 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 32314 model number is decoded
In the 32300-series the last two digits of 32314 encode the bore: code 14 = 70 mm (code × 5 from 04 upward). The ISO 355 envelope is 150 mm outside diameter and 54 mm total assembly width T over the separable cone and cup — 2.756 × 5.906 × 2.126 in, with a 40.0 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 70 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
- commercial gearbox input/output shafts
- conveyor head and tail pulleys
- fork-lift steer axles
- industrial transmission shafts
- light-truck and van wheel hubs
Known failure patterns
- 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
- under-preload end play that lets the rollers skid, producing noise and false brinelling
Selection pitfalls — read before you substitute
- On this 70 mm-bore 32314, 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 70 mm seat can seize hot.
- The 323 heavy wide series at 70 mm bore (150×54 mm) is a steep-angle, high-thrust row for heavy final drives; its 40.0 mm section and 54 mm width dwarf the 30214, and its speed ceiling is the lowest of the four series.
- Check the shoulder geometry for 32314: a generous fillet on the 70 mm shaft looks strong but stops the 54 mm ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 40.0 mm-section cup presses flush in the 150 mm housing.
- Never fit 32314 by tightening the adjuster to force the cone up the 70 mm taper — draw the nut to seat the rollers, then back it off; the 54 mm total width is set by the cup-cone stack, and pushing beyond it is the common cause of seized ribs.
- Keep the 32314 pair matched through rebuilds; the 54 mm running geometry and contact pattern are adjusted between the two cups, so replacing one side with an unmarked row shifts the contact patch off-centre and ruins the 70 mm shaft alignment.
- The cone and the cup of 32314 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.
- Set running clearance (or preload) with the shim pack or adjusting nut at fit-up; a 70 mm-bore 32314 that is too tight overheats and scores the rib, one too loose develops end play and noise — follow the torque-and-untighten procedure.
Frequently asked questions
What are the dimensions of a 32314 tapered roller bearing?
A 32314 single-row metric tapered roller bearing per ISO 355 has a 70 mm bore, 150 mm outer diameter and 54 mm total assembly width (2.756 × 5.906 × 2.126 in), a 40.0 mm radial section and roughly 3809 g geometry-based estimated mass; catalogue masses vary with roller and cage design.
How does the 32314 bore code work?
The last two digits of 32314 are bore code 14, giving 14 × 5 = 70 mm bore — the same convention as 6xx ball bearings, starting at code 04 (20 mm). The 150 mm OD and 54 mm width come from the ISO 355 diameter and width series, not the bore code alone.
What is the cone and cup of 32314?
Tapered roller bearings are separable: the cone is the inner ring with the tapered rollers and cage, the cup is the outer ring. 32314 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 32314 set?
At fit-up the 70 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 70 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 32314 take axial load in both directions?
A single 32314 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.