33020 Bearing Dimensions
33020 tapered roller bearing: 100 mm bore, 150 mm OD, 39 mm total width (FULI catalog). Designation breakdown and size-equivalent codes. Quote.
33020 specifications
| Bore d | 100 mm |
|---|---|
| Outside diameter D | 150 mm |
| Total width T | 39 mm — assembled width of cup and cone |
| Seal / shield options | Open (cup and cone, no seals) |
| Material | GCr15 chrome bearing steel (rings and rolling elements) |
| Precision | P0 (standard); P6 on request |
| Radial clearance | Set during mounting (adjustable, not a C-class value) |
Load ratings & speed
| Dynamic load rating Cr | 229.50 kN |
|---|---|
| Static load rating C0r | 391.20 kN |
| Weight | 2.33 kg — approx. |
Values from FULI's catalog; confirm for your application.
Nearby 33000 series sizes: 33015 bearing · 33019 bearing
Grease quantity for 33020: bearing grease fill calculator.
Buying 33020 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 33020 designation
| Segment | Meaning |
|---|---|
| 3 | Single row tapered roller bearing (metric, ISO 355) |
| 30 | Dimension series 30 |
| 20 | Bore code 20 → 100 mm bore. ISO bore code (00–03 = 10/12/15/17 mm; 04 and above = code × 5 mm). |
33020 interchange
33020 is an ISO designation: bore d, outside diameter D and total width T are the same at each maker. The letters each maker adds are series, design or cage codes, not seal codes, so the full number is different at every brand. 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 33020
FULI makes 33020 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 100 × 150 × 39 mm size.
| Dimension | Nominal, mm | Deviation, µm | Limits, mm |
|---|---|---|---|
| Bore d (Δdmp) | 100 | 0 / −20 | 100.000 / 99.980 |
| Outside diameter D (ΔDmp) | 150 | 0 / −20 | 150.000 / 149.980 |
| Total width T (ΔTs) | 39 | +200 / −200 | 39.200 / 38.800 |
Δdmp and ΔDmp: deviation of the mean bore and mean outside diameter in one radial plane. ΔTs: assembled width of cone and cup, from the ISO 492 table for metric tapered roller bearings. Cone width B and cup width C: 0 / −200 µm each.
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 100 m6 for the shaft of 33020. The cup usually sits in an H7 or J7 housing bore so that it can be moved when the pair is adjusted.
| Seat | Deviation, µm | Limits, mm | Fit with 33020 |
|---|---|---|---|
| Shaft 100 m6 | +35 / +13 | 100.035 / 100.013 | 13 to 55 µm interference |
| Housing 150 H7 | +40 / 0 | 150.040 / 150.000 | 0 to 60 µm clearance |
| Housing 150 J7 | +26 / −14 | 150.026 / 149.986 | 14 µm interference to 46 µm clearance |
Taking the loosest and the tightest combination of limits, a P0 33020 on a 100 mm m6 shaft has 13 to 55 µm interference. Its cup has 0 to 60 µm clearance in an H7 bore and 14 µm interference to 46 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.
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.
33020 compared with nearby sizes
33020 measures 100 × 150 × 39 mm: bore d, outside diameter D and total width T. Other tapered roller bearings on this site for the same 100 mm shaft are 32220 (100 × 180 × 49 mm).
32220 is the next heavier choice for a 100 mm shaft, with an outside diameter 30 mm larger (180 mm) and 10 mm more width (49 mm). In FULI's catalog 32220 has a dynamic load rating of 341 kN against 229.50 kN and a weight of about 5.1 kg against 2.33 kg for 33020.
32217 has the same 150 mm outside diameter with a 85 mm bore, so it fits the same housing bore on a smaller shaft.
30314 has the same 150 mm outside diameter with a 70 mm bore, so it fits the same housing bore on a smaller shaft.
In the 330 series the sizes either side of 33020 are 33019 for a 95 mm shaft.
| Model | Compared with this page | d × D × T (mm) | Cr (kN) | Weight (kg) |
|---|---|---|---|---|
| 33020 | This page | 100 × 150 × 39 | 229.50 | 2.33 |
| 33019 | Next size down | 95 × 145 × 39 | 231.20 | 2.26 |
| 32220 | Same bore | 100 × 180 × 49 | 341 | 5.1 |
| 32217 | Same outside diameter | 85 × 150 × 38.5 | 226.70 | 2.68 |
| 30314 | Same outside diameter | 70 × 150 × 38 | 219.00 | 2.98 |
Cr and weight from FULI's catalog; — = not listed on this site.
33020 weight, load ratings and speed
FULI's catalog gives the weight of 33020 as about 2.33 kg, so 100 bearings weigh about 233 kg and 1,000 about 2330 kg before packing. The weight is for the cone and cup together.
33020 has a dynamic load rating Cr of 229.50 kN and a static load rating C0r of 391.20 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.
Values from FULI's catalog; confirm for your application.
33020 cone and cup
33020 is supplied as a complete bearing: the cone (inner ring with rollers and cage) and the cup (outer ring). The total width T of 39 mm applies when the two are assembled; the cone and the cup on their own are each narrower. Tell us if you need only the cone or only the cup.
Tapered roller bearings carry radial load and axial load in one direction, so 33020 is normally mounted as one of a pair facing each other, and the end play or preload is set when the pair is adjusted on the shaft. That is why FULI lists the clearance as set during mounting, not as a C-class value.
33020 dimensions in inches
The nearest common inch shaft size to the 100 mm bore of 33020 is 3-15/16 in (100.01 mm), 0.01 mm larger than the bore, so 33020 will not go on it. Inch shafts need an inch bearing, not a metric one with a sleeve or shim.
| Dimension | Millimetres | Inches |
|---|---|---|
| Bore d | 100 mm | 3.9370 in |
| Outside diameter D | 150 mm | 5.9055 in |
| Total width T | 39 mm | 1.5354 in |
Converted at 1 in = 25.4 mm and rounded to four decimals. The bearing itself is made to the millimetre sizes.
Grease for 33020
FULI supplies tapered roller bearings rust-protected and normally without grease; grease is added when 33020 is mounted. Relubricating 33020 from the side takes about 29.3 g each time by the formula in our grease calculator: 0.005 × D × T = 0.005 × 150 × 39.
How FULI supplies 33020
The standard 33020 from FULI has GCr15 chrome steel rings and rollers and P0 precision, with P6 on request. Where an order states a requirement for the total width T (39 mm for 33020) or the cone height, each set is checked on a height gauge.
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 33020.
Tools and guides for 33020
- Bearing size finder: look up a size from bore, OD and width
- Bearing weight chart
- Bearing grease fill calculator
- Shaft and housing tolerance chart
- Tapered roller bearing number lookup
- Bearing lubrication basics
- Ball bearing vs roller bearing
- How to choose wheel hub bearings
- All bearing products and model pages
Typical applications
- Vehicle wheel hubs and axles
- Gearboxes and reducers
- Agricultural machinery
- Conveyor pulleys
FAQ
What is the difference between 33020 and 32220?
Both fit a 100 mm shaft. 33020 is 100 × 150 × 39 mm and 32220 is 100 × 180 × 49 mm, so 32220 has an outside diameter 30 mm larger (180 mm) and 10 mm more width (49 mm). In FULI's catalog 32220 has a dynamic load rating of 341 kN against 229.50 kN and a weight of about 5.1 kg against 2.33 kg for 33020. Choose 32220 for a higher load where the housing has room for it; 33020 keeps the housing smaller.
What size is 33020 in inches?
33020 is 3.9370 × 5.9055 × 1.5354 in (100 × 150 × 39 mm, d × D × T). The nearest common inch shaft size to the 100 mm bore of 33020 is 3-15/16 in (100.01 mm), 0.01 mm larger than the bore, so 33020 will not go on it. Use an inch bearing on an inch shaft.
How much does 33020 weigh?
About 2.33 kg in FULI's catalog, so 100 pieces weigh about 233 kg before packing. The weight is for the cone and cup together.
How much grease does 33020 need?
About 29.3 g each time it is relubricated from the side (0.005 × 150 × 39). FULI ships 33020 rust-protected without grease, so the first fill is made at mounting.
Is 33020 the same size across brands?
Bore d, outside diameter D and total width T are the same: 33020 is an ISO designation. The letters each maker adds (NSK HR and J, NTN 4T-, Koyo JR, FAG XL, SKF J2/Q) are series, design or cage codes, not seal codes.