32019 bearing: complete specifications & equivalents
The 32019 is a ISO 355 radial bearing sized 95 x 145 x 32 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Bore diameter d | 95 mm |
| Outer diameter D | 145 mm |
| Width B | 32 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) | 1539 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 32019 are being backfilled — use the inquiry form for certified values.
Dimensions in inches & 32000-series range
| Bore d | 3.74 in |
|---|---|
| Outer diameter D | 5.709 in |
| Width B | 1.26 in |
| ISO bore code | 19 |
| Radial section height (D−d)/2 | 25 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) | 16 of 23 |
| Bore above smallest 32000-series size | 75 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32019 | 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 32019 model number is decoded
In the 32000-series the last two digits of 32019 encode the bore: code 19 = 95 mm (code × 5 from 04 upward). The ISO 355 envelope is 145 mm outside diameter and 32 mm total assembly width T over the separable cone and cup — 3.74 × 5.709 × 1.26 in, with a 25.0 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 95 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
- crane travel wheels and winch drums
- railway axle boxes
- agricultural tractor axles
- truck and trailer wheel hubs
- heavy final drives and differentials
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
- The large 95 mm-bore 32019 develops substantial mounting forces; heat the cone (induction heater, max 120 °C) and never tighten the adjusting nut to seat it — draw it up by torque, then back off to the mark, leaving roughly 0.05–0.20 mm end play on the 95 mm shaft.
- The 320 narrow series at 95 mm bore keeps the OD down to 145 mm for space-limited hubs; its 32 mm width carries less load than a 30219, so do not substitute it into a 302 application without re-rating.
- Before fitting 32019, machine the 95 mm shaft seat and 145 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 32 mm-wide cone and cup only load correctly when the full faces abut, and a large radius pinches the 25.0 mm radial section.
- The 32019 cup drives into the 145 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 32 mm load zone.
- Keep the 32019 pair matched through rebuilds; the 32 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 95 mm shaft alignment.
- Tapered rollers accept virtually no misalignment; a deflected 95 mm shaft or a tilted housing shoulder concentrates load on one end of the 32 mm-wide roller row — align seats and verify housing perpendicularity.
- Press the 32019 cone onto the 95 mm shaft with force on the inner ring and the cup into the 145 mm housing on the outer ring; driving through the rollers or transmitting mounting force across the assembly brinells the raceways.
Frequently asked questions
What are the dimensions of a 32019 tapered roller bearing?
A 32019 single-row metric tapered roller bearing per ISO 355 has a 95 mm bore, 145 mm outer diameter and 32 mm total assembly width (3.74 × 5.709 × 1.26 in), a 25.0 mm radial section and roughly 1539 g geometry-based estimated mass; catalogue masses vary with roller and cage design.
How does the 32019 bore code work?
The last two digits of 32019 are bore code 19, giving 19 × 5 = 95 mm bore — the same convention as 6xx ball bearings, starting at code 04 (20 mm). The 145 mm OD and 32 mm width come from the ISO 355 diameter and width series, not the bore code alone.
What is the cone and cup of 32019?
Tapered roller bearings are separable: the cone is the inner ring with the tapered rollers and cage, the cup is the outer ring. 32019 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 32019 set?
At fit-up the 95 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 0.05–0.20 mm for a 95 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 32019 take axial load in both directions?
A single 32019 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.