23028 bearing: complete specifications & equivalents

Specification table

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 23028 are being backfilled — use the inquiry form for certified values.

Cross references & equivalents

No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.

How the 23028 model number is decoded

In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23028 encode the bore: code 28 = 140 mm (code × 5 from 04 upward). The ISO 15 envelope is 210 mm outside diameter and 53 mm width — 5.512 × 8.268 × 2.087 in, with a 35.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• The large 140 mm-bore 23028 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 53 mm double-row assembly cannot be drifted into position without brinelling.
• In vibrating-screen and feeder duty the 230 row is a common pick: at 140 mm bore the 23028 gives a 210×53 mm envelope with a wide, stiff section, but it must then run C4 clearance with a vibratory-rated cage — a standard CN row with a plain stamped cage will gall and fail early under the same duty.
• Check shaft deflection across the 23028 span: the wide 53 mm section tolerates some misalignment through the sphered raceway, but a bent shaft between two 230-series rows alternates the load path every revolution and frets both 140 mm seats — align to the catalogue angular limit under load, not at standstill.
• Before fitting 23028, machine the 140 mm shaft seat and 210 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 53 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 35.0 mm radial section.
• On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 23028 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 140 mm seat cannot creep.
• Read the damage pattern on a removed 23028: spalling concentrated on one side of the 210 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.
• In a classic two-bearing arrangement the 23028 often serves as the non-locating (floating) bearing, taking radial load while the housing bore lets it drift; it can locate axially in both directions, but sustained pure thrust beyond the catalogue limit unloads one roller row.
• Self-aligning is not a licence to ignore alignment: 23028 accommodates typically around 1° of angular misalignment under normal load (roughly 2° only in favourable, light-load conditions) — the exact figure falls with load, so check the catalogue value rather than designing to the maximum.