22208 Bearing Dimensions
22208 is a spherical roller bearing with a 40 mm bore, 80 mm outer diameter and 23 mm width (40×80×23 mm, ISO 15).
22208 specifications
| Bore d | 40 mm |
|---|---|
| Outside diameter D | 80 mm |
| Width B | 23 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 | 96 kN |
|---|---|
| Static load rating C0r | 90 kN |
| Speed ratings | 8,000 / 11,000 rpm — two catalogue speed columns; lubrication basis not stated |
| Weight | 0.53 kg — approx. |
Values from FULI's catalog; confirm for your application.
Nearby 22200/22300 series sizes: 22206 bearing · 22207 bearing · 22209 bearing · 22210 bearing
Grease quantity for 22208: bearing grease fill calculator.
Buying 22208 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 22208 designation
| Segment | Meaning |
|---|---|
| 2 | Spherical roller bearing (double row, self-aligning) |
| 22 | Dimension series 22 |
| 08 | Bore code 08 → 40 mm bore. ISO bore code (00–03 = 10/12/15/17 mm; 04 and above = code × 5 mm). |
22208 cross reference by brand
22208 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. The table below lists the checked forms.
FULI catalog: 40 × 80 × 23 mm (d × D × B).
| Brand | Cylindrical bore | Tapered bore (K, 1:12) | Oil groove and holes |
|---|---|---|---|
| FULI | 22208 | ask us | Ask us |
| SKF | 22208 E | 22208 EK | No suffix: standard on E design |
| NSK | 22208EAE4 | 22208EAKE4 | E4 in the number |
| NTN | 22208EAD1 | 22208EAKD1 | D1 in the number |
| Koyo | 22208RZ | 22208RZK | Add W33 |
| NACHI | 22208EX | 22208EXK | Add W33 (W20 = holes only) |
| FAG | 22208-E1-XL | 22208-E1-XL-K | No suffix: standard on E1 |
- Tapered-bore versions (K, taper 1:12) fit an adapter sleeve, withdrawal sleeve or tapered shaft. Ask us for a FULI tapered-bore version.
- Cross reference page: full spherical roller table
- SKF page: E, CC/W33 and K suffixes
- NSK, NTN, Koyo and NACHI page: EAE4, EAD1, RZ and EX
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 22208
FULI makes 22208 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 40 × 80 × 23 mm size.
| Dimension | Nominal, mm | Deviation, µm | Limits, mm |
|---|---|---|---|
| Bore d (Δdmp) | 40 | 0 / −12 | 40.000 / 39.988 |
| Outside diameter D (ΔDmp) | 80 | 0 / −13 | 80.000 / 79.987 |
| Width B (ΔBs) | 23 | 0 / −120 | 23.000 / 22.880 |
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 40 k5 for the shaft of 22208. The housing bore is usually H7, or J7 where the outer ring must not creep.
| Seat | Deviation, µm | Limits, mm | Fit with 22208 |
|---|---|---|---|
| Shaft 40 k5 | +13 / +2 | 40.013 / 40.002 | 2 to 25 µm interference |
| Housing 80 H7 | +30 / 0 | 80.030 / 80.000 | 0 to 43 µm clearance |
| Housing 80 J7 | +18 / −12 | 80.018 / 79.988 | 12 µm interference to 31 µm clearance |
Taking the loosest and the tightest combination of limits, a P0 22208 on a 40 mm k5 shaft has 2 to 25 µm interference. Its outer ring has 0 to 43 µm clearance in an H7 bore and 12 µm interference to 31 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.
22208 compared with nearby sizes
22208 measures 40 × 80 × 23 mm: bore d, outside diameter D and width B. Other spherical roller bearings on this site for the same 40 mm shaft are 21308 (40 × 90 × 23 mm) and 22308 (40 × 90 × 33 mm).
21308 is the next heavier choice for a 40 mm shaft, with an outside diameter 10 mm larger (90 mm) and the same width. In FULI's catalog 21308 has a dynamic load rating of 104 kN against 96 kN and a weight of about 0.75 kg against 0.53 kg for 22208.
In the 222 series the sizes either side of 22208 are 22207 for a 35 mm shaft and 22209 for a 45 mm shaft.
| Model | Compared with this page | d × D × B (mm) | Cr (kN) | Weight (kg) |
|---|---|---|---|---|
| 22208 | This page | 40 × 80 × 23 | 96 | 0.53 |
| 22207 | Next size down | 35 × 72 × 23 | 88 | 0.46 |
| 22209 | Next size up | 45 × 85 × 23 | 102 | 0.59 |
| 21308 | Same bore | 40 × 90 × 23 | 104 | 0.75 |
| 22308 | Same bore | 40 × 90 × 33 | 150 | 1.05 |
Cr and weight from FULI's catalog; — = not listed on this site.
22208 weight, load ratings and speed
FULI's catalog gives the weight of 22208 as about 0.53 kg, so 100 bearings weigh about 53 kg and 1,000 about 530 kg before packing. The cylindrical bore (W33) and tapered bore (K/W33) versions share this catalog line.
22208 has a dynamic load rating Cr of 96 kN and a static load rating C0r of 90 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, 8,000 and 11,000 rpm, without stating the lubrication for each column.
Values from FULI's catalog; confirm for your application.
22208 bore and clearance versions
FULI's catalog lists 22208 in two bore versions on one line, both 40 × 80 × 23 mm: 22208W33 with a cylindrical bore and 22208K/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 |
|---|---|
| 22208W33 | Cylindrical 40 mm bore, lubrication groove and holes, C0 clearance |
| 22208K/W33 | Tapered bore 1:12 for sleeve mounting, lubrication groove and holes |
| 22208W33 C3 | Cylindrical bore with C3 radial clearance |
| 22208K/W33 C3 | Tapered bore with C3 radial clearance |
22208 dimensions in inches
The nearest common inch shaft size to the 40 mm bore of 22208 is 1-9/16 in (39.69 mm), 0.31 mm smaller than the bore, so 22208 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 | 40 mm | 1.5748 in |
| Outside diameter D | 80 mm | 3.1496 in |
| Width B | 23 mm | 0.9055 in |
Converted at 1 in = 25.4 mm and rounded to four decimals. The bearing itself is made to the millimetre sizes.
Grease for 22208
Relubricating 22208 from the side takes about 9.20 g each time by the formula in our grease calculator: 0.005 × D × B = 0.005 × 80 × 23. 22208W33 has a lubrication groove and holes in the outer ring; when grease goes in through them the formula is 0.002 × D × B, about 3.68 g for 22208.
How FULI supplies 22208
The standard 22208 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 22208K/W33 C3.
Tools and guides for 22208
Typical applications
- Crushers and vibrating screens
- Conveyor drums
- Fans and blowers
- Gearboxes
- Paper and textile machinery
FAQ
What is the difference between 22208 and 21308?
Both fit a 40 mm shaft. 22208 is 40 × 80 × 23 mm and 21308 is 40 × 90 × 23 mm, so 21308 has an outside diameter 10 mm larger (90 mm) and the same width. In FULI's catalog 21308 has a dynamic load rating of 104 kN against 96 kN and a weight of about 0.75 kg against 0.53 kg for 22208. Choose 21308 for a higher load where the housing has room for it; 22208 keeps the housing smaller.
What size is 22208 in inches?
22208 is 1.5748 × 3.1496 × 0.9055 in (40 × 80 × 23 mm, d × D × B). The nearest common inch shaft size to the 40 mm bore of 22208 is 1-9/16 in (39.69 mm), 0.31 mm smaller than the bore, so 22208 would be loose on it. Use an inch bearing on an inch shaft.
How much does 22208 weigh?
About 0.53 kg in FULI's catalog, so 100 pieces weigh about 53 kg before packing. The cylindrical bore (W33) and tapered bore (K/W33) versions share this catalog line.
How much grease does 22208 need?
About 9.20 g each time it is relubricated from the side (0.005 × 80 × 23).
Is 22208 the same size across brands?
Bore d, outside diameter D and width B are the same: 22208 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).