30213 bearing: complete specifications & equivalents
The 30213 is a ISO 355 radial bearing sized 65 x 120 x 24.75 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 | 120 mm |
| Width B | 24.75 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) | 1009 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 30213 are being backfilled — use the inquiry form for certified values.
Dimensions in inches & 30200-series range
| Bore d | 2.559 in |
|---|---|
| Outer diameter D | 4.724 in |
| Width B | 0.974 in |
| ISO bore code | 13 |
| Radial section height (D−d)/2 | 27.5 mm |
| Smallest bore in 30200-series | 20 mm |
| Largest outer diameter in 30200-series | 200 mm |
| Width range across 30200-series | 15.25–41 mm |
| Bore position in 30200-series (smallest first) | 10 of 19 |
| Bore above smallest 30200-series size | 45 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 30213 | 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 30213 model number is decoded
In the 30200-series the last two digits of 30213 encode the bore: code 13 = 65 mm (code × 5 from 04 upward). The ISO 355 envelope is 120 mm outside diameter and 24.75 mm total assembly width T over the separable cone and cup — 2.559 × 4.724 × 0.974 in, with a 27.5 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
- 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
- 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
Selection pitfalls — read before you substitute
- On this 65 mm-bore 30213, 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 302 light series at 65 mm bore (120×24.75 mm, 27.5 mm section) is the default general-purpose tapered row; a 32213 on the same 65 mm bore uses the same OD but a wider section for heavier load — it is not a like-for-like width swap.
- Before fitting 30213, machine the 65 mm shaft seat and 120 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 24.75 mm-wide cone and cup only load correctly when the full faces abut, and a large radius pinches the 27.5 mm radial section.
- The 30213 cup drives into the 120 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 24.75 mm load zone.
- Inspect the removed 30213 cone and cup as a pair: pitting on the 120 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.
- Press the 30213 cone onto the 65 mm shaft with force on the inner ring and the cup into the 120 mm housing on the outer ring; driving through the rollers or transmitting mounting force across the assembly brinells the raceways.
- Do not swap a 30200 row for a ball bearing of the same bore: tapered rollers are heavier, slower (sliding rib contact caps the speed) and must be adjusted, but they outperform ball bearings on combined load and shock in gear and hub duty.
Frequently asked questions
What are the dimensions of a 30213 tapered roller bearing?
A 30213 single-row metric tapered roller bearing per ISO 355 has a 65 mm bore, 120 mm outer diameter and 24.75 mm total assembly width (2.559 × 4.724 × 0.974 in), a 27.5 mm radial section and roughly 1009 g geometry-based estimated mass; catalogue masses vary with roller and cage design.
How does the 30213 bore code work?
The last two digits of 30213 are bore code 13, giving 13 × 5 = 65 mm bore — the same convention as 6xx ball bearings, starting at code 04 (20 mm). The 120 mm OD and 24.75 mm width come from the ISO 355 diameter and width series, not the bore code alone.
What is the cone and cup of 30213?
Tapered roller bearings are separable: the cone is the inner ring with the tapered rollers and cage, the cup is the outer ring. 30213 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 30213 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 30213 take axial load in both directions?
A single 30213 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.