23256 Spherical Roller Bearing Dimensions
The ENRO 23256 is a spherical roller bearing in the 23200 series, 280 × 500 × 176 mm. Boundary dimensions follow the ISO 15 dimension series.
Three checks for the 23256
Most wrong replacements come from one of these. Each answer below comes from the ENRO model table.
Does the size match?
Measure bore, outside diameter and width. The 23256 is 280 × 500 × 176 mm. If one value differs, see the adjacent sizes below.
Adjacent sizes →Which version do you need?
ENRO lists 2 versions: 23256W33, 23256K/W33. Match the seals, shields or bore type of the old bearing.
Versions table →Is the load rating enough?
Cr 3250 kN, C0r 4900 kN (catalog reference values). Check the life at your load and speed.
Life calculator →Not sure which one you have? Send any part number and we'll match the dimensionally equivalent ENRO model.
Check my 2325623256 dimensions and ratings
| Bore diameterd | 280 mm |
|---|---|
| Outside diameterD | 500 mm |
| WidthB | 176 mm |
| Chamfer dimension, min.r min | 5 mm |
| Basic dynamic load ratingCr | 3250 kN |
| Basic static load ratingC0r | 4900 kN |
| Limiting speed, greasen grease | 800 rpm |
| Limiting speed, oiln oil | 1,100 rpm |
| Weight (approx.)m | 150.0 kg |
| Series | 23200 |
| Material | GCr15 / GCr15SiMn chrome steel |
| Precision class | P0, P6 |
| Cage | Steel, brass |
| Origin | Made in China — Japanese-standard quality management |
Load ratings, limiting speeds and weights are catalog reference values. Values are confirmed per batch on request.
What “23256” means
- 232 — bearing type and dimension series code.
- 56 — bore code: code 56 × 5 = 280 mm.
23256 variants: 23256W33 / 23256K/W33
| Order as | Meaning |
|---|---|
| 23256W33 | Lubrication groove and holes. Groove and holes in the outer ring for relubrication. |
| 23256K/W33 | Tapered bore 1:12 + Lubrication groove and holes. Tapered bore, taper 1:12, for adapter or withdrawal sleeve mounting. Groove and holes in the outer ring for relubrication. |
Internal clearance (for example CN or C3) is stated on your RFQ. Suffix selector →
Print or save this table as PDF, or ask us to send the spec sheet with your quote.
Selection notes for the 23256
How this size sits against its neighbours in the 23200 series and the other spherical roller bearing series with the same bore. Every figure is from the ENRO model table.
- The 23256 is the sixteenth of twenty-seven sizes ENRO lists in the 23200 series, 280 × 500 × 176 mm.
- Next size down, the 23252, is 260 × 480 × 174 mm: twenty millimetres less bore, twenty millimetres less outside diameter, two millimetres narrower.
- Next size up, the 23260, is 300 × 540 × 192 mm: twenty millimetres more bore, 40 mm more outside diameter, sixteen millimetres wider.
- Seven other ENRO spherical roller bearings share the 280 mm bore: the 24156 (24100 series) is 460 × 180 mm, 40 mm less outside diameter and four millimetres wider; the 22356 (22300 series) is 580 × 175 mm, 80 mm more outside diameter and one millimetre narrower.
- The 23256 has a radial section of 110 mm ((D − d) / 2) on a 176 mm width, so its cross-section is wider than it is tall.
- Catalog reference values for the 23256: Cr 3250 kN, C0r 4900 kN, limiting speed 800 rpm with grease, 1,100 rpm with oil, weight 150.0 kg.
- Catalog dynamic load rating Cr is 3250 kN for the 23256 against 3250 kN for the 23252 (the same) and 3900 kN for the 23260 (noticeably more, 650 kN or 20%).
- ENRO lists the 23256 in two versions: 23256W33, 23256K/W33. In the same series, the 23252 is listed in the same two versions; the 23260 is listed in the same two versions.
23256 bearing dimensions: range and series
27 sizes in the 23200 series.
Click a model to open its full specification page.
| Model | d mm | D mm | B mm | Cr kN | C0r kN | Grease rpm | Weight kg | Open model page |
|---|---|---|---|---|---|---|---|---|
| 23240 | 200 | 360 | 128 | 1860 | 2700 | 1,200 | 58.0 | |
| 23244 | 220 | 400 | 144 | 2360 | 3450 | 1,100 | 81.5 | |
| 23248 | 240 | 440 | 160 | 2900 | 4300 | 950 | 110.0 | |
| 23252 | 260 | 480 | 174 | 3250 | 4750 | 850 | 140.0 | |
| 23256 | 280 | 500 | 176 | 3250 | 4900 | 800 | 150.0 | This page |
| 23260 | 300 | 540 | 192 | 3900 | 5850 | 750 | 190.0 | |
| 23264 | 320 | 580 | 208 | 4400 | 6700 | 700 | 240.0 | |
| 23268 | 340 | 620 | 224 | 5100 | 7800 | 560 | 295.0 | |
| 23272 | 360 | 650 | 232 | 5400 | 8300 | 530 | 335 |
Catalog reference values. Full 23200 series table →
If the 23256 is not quite right
Nearest ENRO sizes by bore and by series. Check the housing and shaft before switching.
Other series with a 280 mm bore
Click a model to open its full specification page.
| Model | Series | d | D | B | Cr kN | Open model page |
|---|---|---|---|---|---|---|
| 23256 | 23200 | 280 | 500 | 176 | 3250 | This page |
| 23956 | 23900 | 280 | 380 | 75 | 845 | |
| 23056 | 23000 | 280 | 420 | 106 | 1730 | |
| 24056 | 24000 | 280 | 420 | 140 | 2160 | |
| 23156 | 23100 | 280 | 460 | 146 | 2650 | |
| 24156 | 24100 | 280 | 460 | 180 | 3100 | |
| 22256 | 22200 | 280 | 500 | 130 | 2700 | |
| 22356 | 22300 | 280 | 580 | 175 | 4000 |
Same 500 mm outside diameter, different bore
Click a model to open its full specification page.
Specifications and boundary dimensions
Built to be checked, not believed. Boundary dimensions follow the ISO 15 dimension series. Ratings follow ISO 281 and clearance groups ISO 5753-1; every value on a model page can be checked against the standard.
Boundary dimensions
Boundary dimensions follow the ISO 15 dimension series. Same base number, same d, D and B.
Tolerances
Defines the tolerance classes for radial bearings. State the class you need on the RFQ.
Internal clearance
Defines the clearance groups C2, CN, C3, C4 and C5. State the group you need on the RFQ.
Rating life
Basis of the L10 basic rating life. Use it with the catalog Cr in our life calculator.
Japan-managed quality control
ENRO is a bearing brand for distributors and MRO buyers. Our QC protocol follows Japanese industrial quality practice. Our bearings are made in China.
100% outgoing inspection
Every ENRO bearing — not a sample, every unit — passes outgoing inspection before shipment.
Same color, same box, same label
Every order ships in the same color box with the same label, so repeat shipments match on the shelf.
How to order the 23256: packing and marking
- Version
- Cylindrical or tapered bore (K, K30), with or without W33.
- Clearance group
- CN, C3 or another group. State it per line.
- Quantity per line
- Quantities per model and whether the order repeats.
- Marking options
- ENRO packing, OEM / private label or neutral packaging. State which one per line.
- Destination
- Port or country the order ships to.
Free samples are available.
Get a quote for a 23256
- Model or part number for each line
- Quantity per line
- Seal or shield, snap ring or bore type
- Clearance group, if not CN
- Destination port or country
We reply within 24 hours on business days.
Quote 23256Engineering tools built on our catalog data
23256 FAQ
What are the dimensions of the 23256 spherical roller bearing?
The 23256 has a bore (d) of 280 mm, an outside diameter (D) of 500 mm and a width (B) of 176 mm. Minimum chamfer r is 5 mm.
What load rating does the 23256 have?
Catalog reference values: basic dynamic load rating Cr 3250 kN, static rating C0r 4900 kN, limiting speed 800 rpm with grease. Values are confirmed per batch on request.
Which versions of the 23256 can I order?
ENRO lists the 23256 as 23256W33 (Lubrication groove and holes), 23256K/W33 (Tapered bore 1:12 + Lubrication groove and holes). State the clearance group you need in your RFQ.
Is the ENRO 23256 interchangeable with other brands' 23256?
Boundary dimensions follow the ISO 15 dimension series. The ENRO 23256 is dimensionally interchangeable with other brands' 23256 of the same size. Confirm seal, clearance and cage requirements in your RFQ.
Where are ENRO bearings made?
ENRO bearings are Made in China by partner factories, under Japan-managed quality control. Every unit passes 100% outgoing inspection before shipment.
Which bearings have the same bore as the 23256?
In the ENRO range, 23956 (280 × 380 × 75 mm), 23056 (280 × 420 × 106 mm), 24056 (280 × 420 × 140 mm), 23156 (280 × 460 × 146 mm) share the 280 mm bore. Outside diameter and width differ, so check the housing before switching.
Which clearance group should I order for the 23256?
CN (normal) suits most positions. C3 is common where the inner ring runs warmer than the outer ring, as in electric motors. Groups are defined in ISO 5753-1; state the one you need in your RFQ.
Quote the 23256
Send any part number and we'll match the dimensionally equivalent ENRO model. We reply within 24 hours on business days.