22311 Bearing Dimensions

Tolerances and fits for 22311

FULI makes 22311 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 55 × 120 × 43 mm size.

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 55 m5 for the shaft of 22311. The housing bore is usually H7, or J7 where the outer ring must not creep.

Taking the loosest and the tightest combination of limits, a P0 22311 on a 55 mm m5 shaft has 11 to 39 µm interference. Its outer ring has 0 to 50 µm clearance in an H7 bore and 13 µm interference to 37 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.

22311 compared with nearby sizes

22311 measures 55 × 120 × 43 mm: bore d, outside diameter D and width B. Other spherical roller bearings on this site for the same 55 mm shaft are 22211 (55 × 100 × 25 mm) and 21311 (55 × 120 × 29 mm).

21311 is the lighter option on the same shaft, with the same 120 mm outside diameter and 14 mm less width (29 mm), for housings with less room. In FULI's catalog 21311 has a dynamic load rating of 158 kN against 270 kN and a weight of about 1.70 kg against 2.45 kg for 22311.

22213 has the same 120 mm outside diameter with a 65 mm bore, so it fits the same housing bore on a larger shaft.

In the 223 series the sizes either side of 22311 are 22310 for a 50 mm shaft and 22312 for a 60 mm shaft.

Cr and weight from FULI's catalog; — = not listed on this site.

22311 weight, load ratings and speed

FULI's catalog gives the weight of 22311 as about 2.45 kg, so 100 bearings weigh about 245 kg and 1,000 about 2450 kg before packing. The cylindrical bore (W33) and tapered bore (K/W33) versions share this catalog line.

22311 has a dynamic load rating Cr of 270 kN and a static load rating C0r of 280 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, 4,300 and 5,600 rpm, without stating the lubrication for each column.

Values from FULI's catalog; confirm for your application.

22311 bore and clearance versions

FULI's catalog lists 22311 in two bore versions on one line, both 55 × 120 × 43 mm: 22311W33 with a cylindrical bore and 22311K/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.

22311 dimensions in inches

The nearest common inch shaft size to the 55 mm bore of 22311 is 2-3/16 in (55.56 mm), 0.56 mm larger than the bore, so 22311 will not go on it. Inch shafts need an inch bearing, not a metric one with a sleeve or shim.

Converted at 1 in = 25.4 mm and rounded to four decimals. The bearing itself is made to the millimetre sizes.

Grease for 22311

Relubricating 22311 from the side takes about 25.8 g each time by the formula in our grease calculator: 0.005 × D × B = 0.005 × 120 × 43. 22311W33 has a lubrication groove and holes in the outer ring; when grease goes in through them the formula is 0.002 × D × B, about 10.3 g for 22311.

How FULI supplies 22311

The standard 22311 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 22311K/W33 C3.

Tools and guides for 22311

• Bearing size finder: look up a size from bore, OD and width
• Bearing weight chart
• Bearing grease fill calculator
• Shaft and housing tolerance chart
• Bearing internal clearance: C0, C3 and when to change
• Bearing lubrication basics
• Ball bearing vs roller bearing
• All bearing products and model pages