32007 bearing: complete specifications & equivalents
The 32007 is a ISO 355 radial bearing sized 35 x 62 x 18 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Bore diameter d | 35 mm |
| Outer diameter D | 62 mm |
| Width B | 18 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) | 189 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 32007 are being backfilled — use the inquiry form for certified values.
Dimensions in inches & 32000-series range
| Bore d | 1.378 in |
|---|---|
| Outer diameter D | 2.441 in |
| Width B | 0.709 in |
| ISO bore code | 07 |
| Radial section height (D−d)/2 | 13.5 mm |
| Smallest bore in 32000-series | 20 mm |
| Largest outer diameter in 32000-series | 225 mm |
| Width range across 32000-series | 15–48 mm |
| Bore position in 32000-series (smallest first) | 4 of 23 |
| Bore above smallest 32000-series size | 15 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32007 | 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 32007 model number is decoded
In the 32000-series the last two digits of 32007 encode the bore: code 07 = 35 mm (code × 5 from 04 upward). The ISO 355 envelope is 62 mm outside diameter and 18 mm total assembly width T over the separable cone and cup — 1.378 × 2.441 × 0.709 in, with a 13.5 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 35 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
- steering knuckles
- small gearbox shafts
- agricultural implement wheels
- passenger-car wheel hubs
- small trailer axles
Known failure patterns
- 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
- water and grit pitting in unsealed hubs where the cup-cone joint acts as a debris entry path
- false brinelling from vibration while the axle is stationary during transport
- fretting corrosion on a loose shaft seat when the cone is pressed to an interference that relaxes with wear
Selection pitfalls — read before you substitute
- At 35 mm bore the small 32007 is commonly factory-adjusted in a hub unit; an after-market fit-up must reproduce the specified end play (a typical starting range of 0.02–0.10 mm at the 35 mm shaft) or the wheel runs hot within the first hundred kilometres.
- The 320 narrow series at 35 mm bore keeps the OD down to 62 mm for space-limited hubs; its 18 mm width carries less load than a 30207, so do not substitute it into a 302 application without re-rating.
- Before fitting 32007, machine the 35 mm shaft seat and 62 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 18 mm-wide cone and cup only load correctly when the full faces abut, and a large radius pinches the 13.5 mm radial section.
- The 32007 cup drives into the 62 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 18 mm load zone.
- Keep the 32007 pair matched through rebuilds; the 18 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 35 mm shaft alignment.
- A single 32007 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 320-series pair adjusted against each other.
- The cone and the cup of 32007 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 32007 tapered roller bearing?
A 32007 single-row metric tapered roller bearing per ISO 355 has a 35 mm bore, 62 mm outer diameter and 18 mm total assembly width (1.378 × 2.441 × 0.709 in), a 13.5 mm radial section and roughly 189 g geometry-based estimated mass; catalogue masses vary with roller and cage design.
How does the 32007 bore code work?
The last two digits of 32007 are bore code 07, giving 07 × 5 = 35 mm bore — the same convention as 6xx ball bearings, starting at code 04 (20 mm). The 62 mm OD and 18 mm width come from the ISO 355 diameter and width series, not the bore code alone.
What is the cone and cup of 32007?
Tapered roller bearings are separable: the cone is the inner ring with the tapered rollers and cage, the cup is the outer ring. 32007 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 32007 set?
At fit-up the 35 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 0.02–0.10 mm for a 35 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 32007 take axial load in both directions?
A single 32007 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.