22312 Bearing Dimensions

Tolerances and fits for 22312

FULI makes 22312 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 60 × 130 × 46 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 60 m5 for the shaft of 22312. 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 22312 on a 60 mm m5 shaft has 11 to 39 µm interference. Its outer ring has 0 to 58 µm clearance in an H7 bore and 14 µm interference to 44 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.

22312 compared with nearby sizes

22312 measures 60 × 130 × 46 mm: bore d, outside diameter D and width B. Other spherical roller bearings on this site for the same 60 mm shaft are 22212 (60 × 110 × 28 mm) and 21312 (60 × 130 × 31 mm).

21312 is the lighter option on the same shaft, with the same 130 mm outside diameter and 15 mm less width (31 mm), for housings with less room. In FULI's catalog 21312 has a dynamic load rating of 212 kN against 310 kN and a weight of about 2.10 kg against 3.10 kg for 22312.

22215 has the same 130 mm outside diameter with a 75 mm bore, so it fits the same housing bore on a larger shaft.

In the 223 series the sizes either side of 22312 are 22311 for a 55 mm shaft and 22314 for a 70 mm shaft.

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

22312 weight, load ratings and speed

FULI's catalog gives the weight of 22312 as about 3.10 kg, so 100 bearings weigh about 310 kg and 1,000 about 3100 kg before packing. The cylindrical bore (W33) and tapered bore (K/W33) versions share this catalog line.

22312 has a dynamic load rating Cr of 310 kN and a static load rating C0r of 335 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, 4,000 and 5,300 rpm, without stating the lubrication for each column.

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

22312 bore and clearance versions

FULI's catalog lists 22312 in two bore versions on one line, both 60 × 130 × 46 mm: 22312W33 with a cylindrical bore and 22312K/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.

22312 dimensions in inches

The nearest common inch shaft size to the 60 mm bore of 22312 is 2-3/8 in (60.33 mm), 0.33 mm larger than the bore, so 22312 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 22312

Relubricating 22312 from the side takes about 29.9 g each time by the formula in our grease calculator: 0.005 × D × B = 0.005 × 130 × 46. 22312W33 has a lubrication groove and holes in the outer ring; when grease goes in through them the formula is 0.002 × D × B, about 12.0 g for 22312.

How FULI supplies 22312

The standard 22312 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 22312K/W33 C3.

Tools and guides for 22312

• 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