23015 bearing: complete specifications & equivalents
The 23015 is a ISO 15 radial bearing sized 75 x 115 x 30 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 | 75 mm |
| Outer diameter D | 115 mm |
| Width B | 30 mm |
| Seal / shield | open |
| Internal clearance | CN / C3 / C4 available |
| Tolerance class | P0 |
| Cage | steel |
| Operating temperature | -30 to +120 °C |
| Mass (geometry estimate) | 914 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 23015 are being backfilled — use the inquiry form for certified values.
Dimensions in inches & 23000-series range
| Bore d | 2.953 in |
|---|---|
| Outer diameter D | 4.528 in |
| Width B | 1.181 in |
| ISO bore code | 15 |
| Radial section height (D−d)/2 | 20 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) | 2 of 23 |
| Bore above smallest 23000-series size | 5 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the 23015 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 23015 encode the bore: code 15 = 75 mm (code × 5 from 04 upward). The ISO 15 envelope is 115 mm outside diameter and 30 mm width — 2.953 × 4.528 × 1.181 in, with a 20.0 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 k5 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
- industrial gearbox and drive shafts
- elevator winches and hoist drums
- process crane travel wheels
- conveyor head and tail pulleys
- vibrating screens, feeders and shakeout machines
Known failure patterns
- raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty
- roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set
- cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit
- 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
Selection pitfalls — read before you substitute
- On this 75 mm-bore 23015, specify C3 clearance as the default for an interference inner-ring fit and verify residual play after mounting; a medium-section row that ran free on the bench can be fully clamped at operating temperature on the 75 mm shaft.
- The 230 series (ISO 15 dimension series 30) pairs a wide 30 mm section with a compact 115 mm OD at 75 mm bore — the radial envelope is one step smaller than the 222 medium series, so it carries heavy radial load in restricted housing space; it is not dimensionally interchangeable with a 222 or 223 row on the same bore, so verify OD and width before substitution.
- Housing stiffness governs the 23015: with the load carried on a 115 mm OD but only a 20.0 mm radial section feeding it, a soft or ribbed thin housing lets the outer ring flex and the sphered raceway misreads it as misalignment — support the housing boss fully around the 30 mm width.
- The 30 mm-wide 23015 seats against shaft and housing shoulders whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 75 mm bore and 115 mm OD faces abut square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 20.0 mm section.
- For a cylindrical-bore 23015, warm the inner ring to 80–100 °C (induction heater, never a flame) and slide it dry to the shoulder of the 75 mm shaft; cooling creates the interference, while hammering cold through the 115 mm assembly dents the sphered raceways.
- Relubricate 23015 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 30 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 75 mm bore starved.
- Choose the bore type deliberately: plain 23015 takes a cylindrical seat, while the K variant has a 1:12 tapered bore and mounts on an adapter sleeve (H3xx series) over a plain commercial shaft or directly on a tapered journal — the two mounting procedures are not interchangeable.
- Order clearance for the mounting method: an interference fit on a rotating inner ring plus thermal growth eats into CN play, so most industrial 75 mm-bore mounts use C3, vibrating screens use C4, and CN is mainly for loose/split-housing fits — the designation suffix states the class.
Frequently asked questions
What are the dimensions of a 23015 spherical roller bearing?
A 23015 double-row spherical roller bearing per ISO 15 has a 75 mm bore, 115 mm outer diameter and 30 mm width (2.953 × 4.528 × 1.181 in), a 20.0 mm radial section and roughly 914 g geometry-based estimated mass; catalogue masses vary with cage and design.
How does the 23015 bore code work?
The leading 2 in 23015 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 15: 15 × 5 = 75 mm. The 115 mm OD and 30 mm width come from the dimension series (23000), not from the bore code alone.
How much misalignment can a 23015 accommodate?
Thanks to the sphered outer ring raceway, 23015 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 23015 and 23015K?
The plain 23015 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 23015 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.