23026 bearing: complete specifications & equivalents
The 23026 is a ISO 15 radial bearing sized 130 x 200 x 52 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | Generic ISO interchange (unbranded) |
| Bore diameter d | 130 mm |
| Outer diameter D | 200 mm |
| Width B | 52 mm |
| Seal / shield | open |
| Internal clearance | CN / C3 / C4 available |
| Tolerance class | P0 |
| Cage | steel |
| Operating temperature | -30 to +120 °C |
| Mass (geometry estimate) | 4814 g |
| Standard | ISO 15 |
| Catalog version | iso15-srb-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 23026 are being backfilled — use the inquiry form for certified values.
Dimensions in inches & 23000-series range
| Bore d | 5.118 in |
|---|---|
| Outer diameter D | 7.874 in |
| Width B | 2.047 in |
| ISO bore code | 26 |
| Radial section height (D−d)/2 | 35 mm |
| Smallest bore in 23000-series | 70 mm |
| Largest outer diameter in 23000-series | 480 mm |
| Width range across 23000-series | 27–121 mm |
| Bore position in 23000-series (smallest first) | 10 of 23 |
| Bore above smallest 23000-series size | 60 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the 23026 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 23026 encode the bore: code 26 = 130 mm (code × 5 from 04 upward). The ISO 15 envelope is 200 mm outside diameter and 52 mm width — 5.118 × 7.874 × 2.047 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
Common applications
- paper machine drying cylinders
- large gear drives and mill pinions
- heavy conveyor drum pulleys
- cement and aggregate processing machinery
- mining and aggregate vibrating screens
Known failure patterns
- fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter
- lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime
- water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade
- unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely
- thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing
Selection pitfalls — read before you substitute
- The large 130 mm-bore 23026 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 52 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 (200 mm against roughly a size larger), which raises shaft support without growing the housing — the flip side is that its 35.0 mm section concentrates load, so seat finish, shoulder squareness and housing stiffness matter more than on a wider 223 row.
- Drive-up a sleeve-mounted 23026 on residual clearance, not feel: the 130 mm K taper pulls the wide 52 mm inner ring up quickly, and every 0.01 mm of radial clearance removed is real preload on a 35.0 mm section — measure with feeler gauges at the unloaded roller row before locking the KM nut.
- Check the shoulder geometry for 23026: a generous fillet on the 130 mm shaft looks strong but stops the 52 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 35.0 mm-section outer ring presses flush in the 200 mm housing.
- Large 23026 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 52 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 23026, 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 130 mm journal must be replaced, or the new bearing frets the same seat.
- Press 23026 using the right ring: force on the inner ring for an interference shaft fit and on the outer ring for a housing fit — transmitting mounting force through the barrel rollers brinells the sphered raceways of the 200 mm assembly.
- Match the cage to the duty: the E/CC stamped window-steel cage is the standard for general 23026 service, while the machined brass CA cage is preferred for heavy shock and vibratory applications — never replace a CA row with a CC row in a screen or crusher without re-rating.
Frequently asked questions
What are the dimensions of a 23026 spherical roller bearing?
A 23026 double-row spherical roller bearing per ISO 15 has a 130 mm bore, 200 mm outer diameter and 52 mm width (5.118 × 7.874 × 2.047 in), a 35.0 mm radial section and roughly 4814 g geometry-based estimated mass; catalogue masses vary with cage and design.
How does the 23026 bore code work?
The leading 2 in 23026 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 26: 26 × 5 = 130 mm. The 200 mm OD and 52 mm width come from the dimension series (23000), not from the bore code alone.
How much misalignment can a 23026 accommodate?
Thanks to the sphered outer ring raceway, 23026 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty.
What is the difference between 23026 and 23026K?
The plain 23026 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer.
Should the 23026 be ordered with CN, C3 or C4 clearance?
Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option.
Reviewed & verified by the MPN Base engineering desk against source catalog iso15-srb-geometry on 2026-09-24. Read our editorial & correction policy.