23044 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 23044 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 23044 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 23044 encode the bore: code 44 = 220 mm (code × 5 from 04 upward). The ISO 15 envelope is 340 mm outside diameter and 90 mm width — 8.661 × 13.386 × 3.543 in, with a 60.0 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 220 mm-bore 23044 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 90 mm double-row assembly cannot be drifted into position without brinelling.
• The 230 series keeps the outside diameter one step below the 222 medium row at the same bore (340 mm against roughly a size larger), which raises shaft support without growing the housing — the flip side is that its 60.0 mm section concentrates load, so seat finish, shoulder squareness and housing stiffness matter more than on a wider 223 row.
• Thermal soak matters on this 220 mm-bore row: a 340 mm housing heating faster than the shaft closes the 60.0 mm section's internal clearance, so a mount that ran quiet cold can seize hot — start from C3/C4 and verify the operating-temperature play before signing off the 90 mm assembly.
• Check the shoulder geometry for 23044: a generous fillet on the 220 mm shaft looks strong but stops the 90 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 60.0 mm-section outer ring presses flush in the 340 mm housing.
• Large 23044 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 90 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).
• When reusing a sleeve-mounted 23044, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 220 mm journal must be replaced, or the new bearing frets the same seat.
• In a classic two-bearing arrangement the 23044 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: 23044 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.