30206 Bearing Dimensions
30206 is a tapered roller bearing with a 30 mm bore, 62 mm outer diameter and 17.25 mm total width (30×62×17.25 mm, ISO 355). Cone 16 mm, cup 14 mm, designation, size-equivalent codes. Quote.
30206 specifications
| Bore d | 30 mm |
|---|---|
| Outside diameter D | 62 mm |
| Total width T | 17.25 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 | Load ratings for this model are being checked against FULI's catalog. Ask for them with the quote. |
Nearby 30200/30300 series sizes: 30205 bearing · 30208 bearing · 30209 bearing
Grease quantity for 30206: bearing grease fill calculator.
Buying 30206 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 30206 designation
| Segment | Meaning |
|---|---|
| 3 | Single row tapered roller bearing (metric, ISO 355) |
| 02 | Dimension series 02 |
| 06 | Bore code 06 → 30 mm bore. ISO bore code (00–03 = 10/12/15/17 mm; 04 and above = code × 5 mm). |
30206 cross reference by brand
30206 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. The table below lists the checked form for each one.
FULI catalog: 30 × 62 × 17.25 mm (d × D × T).
| Brand | Designation |
|---|---|
| FULI | 30206 |
| SKF | 30206 |
| Timken | 30206 |
| NSK | HR30206J |
| NTN | 4T-30206 |
| Koyo | 30206JR |
| FAG | 30206-XL |
- SKF's catalog table lists the basic number 30206; it is usually ordered as 30206 J2/Q (J2 = pressed steel cage, Q = improved friction torque and raceway geometry).
- Timken page: full tapered roller table (SKF, NSK, NTN, Koyo, FAG columns)
- SKF page: J2/Q and B suffixes
- NSK, NTN, Koyo and NACHI page: HR…J, 4T- and JR
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 30206
FULI makes 30206 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 30 × 62 × 17.25 mm size.
| Dimension | Nominal, mm | Deviation, µm | Limits, mm |
|---|---|---|---|
| Bore d (Δdmp) | 30 | 0 / −12 | 30.000 / 29.988 |
| Outside diameter D (ΔDmp) | 62 | 0 / −16 | 62.000 / 61.984 |
| Total width T (ΔTs) | 17.25 | +200 / 0 | 17.450 / 17.250 |
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 / −120 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 30 k5 for the shaft of 30206. 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 30206 |
|---|---|---|---|
| Shaft 30 k5 | +11 / +2 | 30.011 / 30.002 | 2 to 23 µm interference |
| Housing 62 H7 | +30 / 0 | 62.030 / 62.000 | 0 to 46 µm clearance |
| Housing 62 J7 | +18 / −12 | 62.018 / 61.988 | 12 µm interference to 34 µm clearance |
Taking the loosest and the tightest combination of limits, a P0 30206 on a 30 mm k5 shaft has 2 to 23 µm interference. Its cup has 0 to 46 µm clearance in an H7 bore and 12 µm interference to 34 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.
30206 compared with nearby sizes
30206 measures 30 × 62 × 17.25 mm: bore d, outside diameter D and total width T. Other tapered roller bearings on this site for the same 30 mm shaft are 32006 (30 × 55 × 17 mm), 32206 (30 × 62 × 21.25 mm), 33206 (30 × 62 × 25 mm) and 30306 (30 × 72 × 20.75 mm).
32206 is the next heavier choice for a 30 mm shaft, with the same 62 mm outside diameter and 4 mm more width (21.25 mm). In FULI's catalog 32206 has a weight of about 0.287 kg against 0.231 kg for 30206.
32006 is the lighter option on the same shaft, with an outside diameter 7 mm smaller (55 mm) and 0.25 mm less width (17 mm), for housings with less room.
30305 has the same 62 mm outside diameter with a 25 mm bore, so it fits the same housing bore on a smaller shaft.
32007 has the same 62 mm outside diameter with a 35 mm bore, so it fits the same housing bore on a larger shaft.
In the 302 series the sizes either side of 30206 are 30205 for a 25 mm shaft and 30207 for a 35 mm shaft.
| Model | Compared with this page | d × D × T (mm) | Cr (kN) | Weight (kg) |
|---|---|---|---|---|
| 30206 | This page | 30 × 62 × 17.25 | — | 0.231 |
| 30205 | Next size down | 25 × 52 × 16.25 | 32.20 | 0.153 |
| 30207 | Next size up | 35 × 72 × 18.25 | 54.20 | 0.332 |
| 32006 | Same bore | 30 × 55 × 17 | — | — |
| 32206 | Same bore | 30 × 62 × 21.25 | — | 0.287 |
| 33206 | Same bore | 30 × 62 × 25 | 63.80 | 0.347 |
| 30306 | Same bore | 30 × 72 × 20.75 | 59.00 | 0.385 |
| 30305 | Same outside diameter | 25 × 62 × 18.25 | 46.90 | 0.266 |
| 32007 | Same outside diameter | 35 × 62 × 18 | — | — |
Cr and weight from FULI's catalog; — = not listed on this site.
30206 weight
FULI's catalog gives the weight of 30206 as about 0.231 kg, so 100 bearings weigh about 23.1 kg and 1,000 about 231 kg before packing. The weight is for the cone and cup together.
Load ratings and speeds for 30206 are not listed on this page; ask us and we send them with the quotation.
Values from FULI's catalog; confirm for your application.
30206 cone and cup
30206 is supplied as a complete bearing: the cone (inner ring with rollers and cage) and the cup (outer ring). The total width T of 17.25 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 30206 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.
30206 dimensions in inches
The nearest common inch shaft size to the 30 mm bore of 30206 is 1-3/16 in (30.16 mm), 0.16 mm larger than the bore, so 30206 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 | 30 mm | 1.1811 in |
| Outside diameter D | 62 mm | 2.4409 in |
| Total width T | 17.25 mm | 0.6791 in |
Converted at 1 in = 25.4 mm and rounded to four decimals. The bearing itself is made to the millimetre sizes.
Grease for 30206
FULI supplies tapered roller bearings rust-protected and normally without grease; grease is added when 30206 is mounted. Relubricating 30206 from the side takes about 5.35 g each time by the formula in our grease calculator: 0.005 × D × T = 0.005 × 62 × 17.25.
How FULI supplies 30206
The standard 30206 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 (17.25 mm for 30206) 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 30206.
Tools and guides for 30206
- 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 30206 and 32206?
Both fit a 30 mm shaft. 30206 is 30 × 62 × 17.25 mm and 32206 is 30 × 62 × 21.25 mm, so 32206 has the same 62 mm outside diameter and 4 mm more width (21.25 mm). In FULI's catalog 32206 has a weight of about 0.287 kg against 0.231 kg for 30206. Choose 32206 for a higher load where the housing has room for it; 30206 keeps the housing smaller.
What is the difference between 30206 and 32006?
Both fit a 30 mm shaft. 30206 is 30 × 62 × 17.25 mm and 32006 is 30 × 55 × 17 mm, so 32006 has an outside diameter 7 mm smaller (55 mm) and 0.25 mm less width (17 mm). 32006 suits a housing with less room; 30206 carries more load.
What size is 30206 in inches?
30206 is 1.1811 × 2.4409 × 0.6791 in (30 × 62 × 17.25 mm, d × D × T). The nearest common inch shaft size to the 30 mm bore of 30206 is 1-3/16 in (30.16 mm), 0.16 mm larger than the bore, so 30206 will not go on it. Use an inch bearing on an inch shaft.
How much does 30206 weigh?
About 0.231 kg in FULI's catalog, so 100 pieces weigh about 23.1 kg before packing. The weight is for the cone and cup together.
How much grease does 30206 need?
About 5.35 g each time it is relubricated from the side (0.005 × 62 × 17.25). FULI ships 30206 rust-protected without grease, so the first fill is made at mounting.
Is 30206 the same size across brands?
Bore d, outside diameter D and total width T are the same: 30206 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.
Where are the load ratings for 30206?
Load ratings for 30206 are being checked against FULI's catalog and are not shown on this page yet. Model pages with a "Load ratings & speed" table carry values from FULI's catalog.