23064 bearing: complete specifications & equivalents
The 23064 is a ISO 15 radial bearing sized 320 x 480 x 121 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 | 320 mm |
| Outer diameter D | 480 mm |
| Width B | 121 mm |
| Seal / shield | open |
| Internal clearance | CN / C3 / C4 available |
| Tolerance class | P0 |
| Cage | steel |
| Operating temperature | -30 to +120 °C |
| Mass (geometry estimate) | 62068 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 23064 are being backfilled — use the inquiry form for certified values.
Dimensions in inches & 23000-series range
| Bore d | 12.598 in |
|---|---|
| Outer diameter D | 18.898 in |
| Width B | 4.764 in |
| ISO bore code | 64 |
| Radial section height (D−d)/2 | 80 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) | 23 of 23 |
| Bore above smallest 23000-series size | 250 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the 23064 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 23064 encode the bore: code 64 = 320 mm (code × 5 from 04 upward). The ISO 15 envelope is 480 mm outside diameter and 121 mm width — 12.598 × 18.898 × 4.764 in, with a 80.0 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
- heavy conveyor drum pulleys
- cement and aggregate processing machinery
- mining and aggregate vibrating screens
- jaw and cone crusher eccentric shafts
- paper machine drying cylinders
Known failure patterns
- 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
- water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade
Selection pitfalls — read before you substitute
- The large 320 mm-bore 23064 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 121 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 320 mm bore the 23064 gives a 480×121 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.
- Thermal soak matters on this 320 mm-bore row: a 480 mm housing heating faster than the shaft closes the 80.0 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 121 mm assembly.
- Before fitting 23064, machine the 320 mm shaft seat and 480 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 121 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 80.0 mm radial section.
- On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 23064 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 320 mm seat cannot creep.
- Read the damage pattern on a removed 23064: spalling concentrated on one side of the 480 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.
- Order clearance for the mounting method: an interference fit on a rotating inner ring plus thermal growth eats into CN play, so most industrial 320 mm-bore mounts use C3, vibrating screens use C4, and CN is mainly for loose/split-housing fits — the designation suffix states the class.
- Specify W33 when the 121 mm-wide bearing must be relubricated in place: it is the outer-ring annular groove with lubrication holes; without W33 grease only reaches the contacts through the shaft or housing arrangement.
Frequently asked questions
What are the dimensions of a 23064 spherical roller bearing?
A 23064 double-row spherical roller bearing per ISO 15 has a 320 mm bore, 480 mm outer diameter and 121 mm width (12.598 × 18.898 × 4.764 in), a 80.0 mm radial section and roughly 62068 g geometry-based estimated mass; catalogue masses vary with cage and design.
How does the 23064 bore code work?
The leading 2 in 23064 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 64: 64 × 5 = 320 mm. The 480 mm OD and 121 mm width come from the dimension series (23000), not from the bore code alone.
How much misalignment can a 23064 accommodate?
Thanks to the sphered outer ring raceway, 23064 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 23064 and 23064K?
The plain 23064 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 23064 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.