23228 Bearing Dimensions
23228 spherical roller bearing: bore 140 mm, dimensions 140x250x88 mm (FULI catalog). Designation breakdown, bore options and size-equivalent codes.
23228 specifications
| Bore d | 140 mm |
|---|---|
| Outside diameter D | 250 mm |
| Width B | 88 mm |
| Seal / shield options | Open |
| Material | GCr15 chrome bearing steel (rings and rolling elements) |
| Precision | P0 (standard); P6 on request |
| Radial clearance | C0 (standard); C3 on request |
Load ratings & speed
| Dynamic load rating Cr | 915 kN |
|---|---|
| Static load rating C0r | 1250 kN |
| Speed ratings | 1,700 / 2,400 rpm — two catalogue speed columns; lubrication basis not stated |
| Weight | 19.00 kg — approx. |
Values from FULI's catalog; confirm for your application.
Nearby 23200 series sizes: 23222 bearing · 23224 bearing · 23230 bearing · 23232 bearing
Grease quantity for 23228: bearing grease fill calculator.
Buying 23228 in quantity? See bearing wholesale supplier for pricing by quantity and shipping, and bearing manufacturer in China for how to check the factory.
How to read the 23228 designation
| Segment | Meaning |
|---|---|
| 2 | Spherical roller bearing (double row, self-aligning) |
| 32 | Dimension series 32 |
| 28 | Bore code 28 → 140 mm bore. ISO bore code (00–03 = 10/12/15/17 mm; 04 and above = code × 5 mm). |
23228 interchange
23228 is an ISO designation: bore d, outside diameter D and width B are the same at each maker. The letters each maker adds are design and cage codes, not seal codes; K marks a tapered bore, and each maker marks the oil groove and holes in its own way. Send us the full number on your old bearing and we confirm the match.
Brand names are trademarks of their respective owners. FULI is not affiliated with, authorized by or endorsed by these companies. Part numbers are shown for interchange reference only. FULI dimensions, load ratings and speeds come from the FULI catalog.
Tolerances and fits for 23228
FULI makes 23228 to P0 as standard, with P6 on request. P0 is the Normal tolerance class of ISO 492; P6 limits are tighter. These are the P0 limits for the 140 × 250 × 88 mm size.
| Dimension | Nominal, mm | Deviation, µm | Limits, mm |
|---|---|---|---|
| Bore d (Δdmp) | 140 | 0 / −25 | 140.000 / 139.975 |
| Outside diameter D (ΔDmp) | 250 | 0 / −30 | 250.000 / 249.970 |
| Width B (ΔBs) | 88 | 0 / −250 | 88.000 / 87.750 |
Δdmp and ΔDmp: deviation of the mean bore and mean outside diameter in one radial plane. ΔBs: inner ring width; the outer ring width has the same limits.
Shaft and housing fits (general guidance)
For an inner ring that turns with a solid steel shaft under normal load, bearing makers’ fit tables give 140 n6 for the shaft of 23228. The housing bore is usually H7, or J7 where the outer ring must not creep.
| Seat | Deviation, µm | Limits, mm | Fit with 23228 |
|---|---|---|---|
| Shaft 140 n6 | +52 / +27 | 140.052 / 140.027 | 27 to 77 µm interference |
| Housing 250 H7 | +46 / 0 | 250.046 / 250.000 | 0 to 76 µm clearance |
| Housing 250 J7 | +30 / −16 | 250.030 / 249.984 | 16 µm interference to 60 µm clearance |
Taking the loosest and the tightest combination of limits, a P0 23228 on a 140 mm n6 shaft has 27 to 77 µm interference. Its outer ring has 0 to 76 µm clearance in an H7 bore and 16 µm interference to 60 µm clearance in a J7 bore.
This is general guidance, not a FULI specification. Heavy or shock loads, a hollow shaft, a thin-walled, split or light-alloy housing, or a large temperature difference between shaft and housing call for other classes, and the drawing of your machine takes priority. A tight shaft fit or a hot housing uses up internal clearance, and that is when C3 is chosen instead of C0.
If the outer ring turns and the shaft stands still, as in an idler pulley or a wheel hub, the fits are reversed: the housing gets the interference fit (for example N7 or P7) and the shaft a sliding one (g6 or h6).
Sources: ISO 492 tables as printed in the NTN catalogue CAT. No. 2203/E (Tables 6.4 and 6.5) and the RKB tolerance catalogue; ISO 286-2 for the seats; SKF and NTN fit tables for the shaft and housing classes.
23228 compared with nearby sizes
23228 measures 140 × 250 × 88 mm: bore d, outside diameter D and width B.
In the 232 series the sizes either side of 23228 are 23224 for a 120 mm shaft and 23230 for a 150 mm shaft.
| Model | Compared with this page | d × D × B (mm) | Cr (kN) | Weight (kg) |
|---|---|---|---|---|
| 23228 | This page | 140 × 250 × 88 | 915 | 19.00 |
| 23224 | Next size down | 120 × 215 × 76 | 695 | 12.00 |
| 23230 | Next size up | 150 × 270 × 96 | 1080 | 24.50 |
Cr and weight from FULI's catalog; — = not listed on this site.
23228 weight, load ratings and speed
FULI's catalog gives the weight of 23228 as about 19.00 kg, so 100 bearings weigh about 1900 kg and 1,000 about 19000 kg before packing. The cylindrical bore (W33) and tapered bore (K/W33) versions share this catalog line.
23228 has a dynamic load rating Cr of 915 kN and a static load rating C0r of 1250 kN. Cr is the load used to work out rating life; C0r is the reference for loads carried while the bearing is stationary or turning slowly. The catalog lists two speed values, 1,700 and 2,400 rpm, without stating the lubrication for each column.
Values from FULI's catalog; confirm for your application.
23228 bore and clearance versions
FULI's catalog lists 23228 in two bore versions on one line, both 140 × 250 × 88 mm: 23228W33 with a cylindrical bore and 23228K/W33 with a 1:12 tapered bore. W33 marks the lubrication groove and holes in the outer ring. The K version is mounted on an adapter sleeve, a withdrawal sleeve or a tapered shaft seat. Radial clearance is C0 as standard and C3 on request.
| Designation | What it is |
|---|---|
| 23228W33 | Cylindrical 140 mm bore, lubrication groove and holes, C0 clearance |
| 23228K/W33 | Tapered bore 1:12 for sleeve mounting, lubrication groove and holes |
| 23228W33 C3 | Cylindrical bore with C3 radial clearance |
| 23228K/W33 C3 | Tapered bore with C3 radial clearance |
23228 dimensions in inches
The nearest common inch shaft size to the 140 mm bore of 23228 is 5-1/2 in (139.70 mm), 0.3 mm smaller than the bore, so 23228 would be loose on it. Inch shafts need an inch bearing, not a metric one with a sleeve or shim.
| Dimension | Millimetres | Inches |
|---|---|---|
| Bore d | 140 mm | 5.5118 in |
| Outside diameter D | 250 mm | 9.8425 in |
| Width B | 88 mm | 3.4646 in |
Converted at 1 in = 25.4 mm and rounded to four decimals. The bearing itself is made to the millimetre sizes.
Grease for 23228
Relubricating 23228 from the side takes about 110.0 g each time by the formula in our grease calculator: 0.005 × D × B = 0.005 × 250 × 88. 23228W33 has a lubrication groove and holes in the outer ring; when grease goes in through them the formula is 0.002 × D × B, about 44.0 g for 23228.
How FULI supplies 23228
The standard 23228 from FULI has GCr15 chrome steel rings and rollers, P0 precision and C0 radial clearance, with P6 and C3 on request.
Rings are marked with a brand you are authorised to use, with the FULI brand, or left neutral, as your order states. The box is printed with the model, precision class and brand.
Inquiries that leave out the prefix or suffix letters are the usual cause of a wrong quote, so write the full designation, for example 23228K/W33 C3.
Tools and guides for 23228
Typical applications
- Crushers and vibrating screens
- Conveyor drums
- Fans and blowers
- Gearboxes
- Paper and textile machinery
FAQ
What size is 23228 in inches?
23228 is 5.5118 × 9.8425 × 3.4646 in (140 × 250 × 88 mm, d × D × B). The nearest common inch shaft size to the 140 mm bore of 23228 is 5-1/2 in (139.70 mm), 0.3 mm smaller than the bore, so 23228 would be loose on it. Use an inch bearing on an inch shaft.
How much does 23228 weigh?
About 19.00 kg in FULI's catalog, so 100 pieces weigh about 1900 kg before packing. The cylindrical bore (W33) and tapered bore (K/W33) versions share this catalog line.
How much grease does 23228 need?
About 110.0 g each time it is relubricated from the side (0.005 × 250 × 88).
Is 23228 the same size across brands?
Bore d, outside diameter D and width B are the same: 23228 is an ISO designation. The letters each maker adds (SKF E or CC, NSK CE4, EAE4 or CDE4, NTN EAD1, Koyo RZ, NACHI EX or E, FAG E1-XL) are design and cage codes, not seal codes. K marks a tapered bore, and the oil groove and holes are marked differently by each maker (SKF W33, NSK E4, NTN D1).