25580 Bearing Dimensions
25580 inch tapered roller bearing cone, paired with the 25520 cup: 44.45 mm (1.750 in) bore, 82.931 mm OD, 23.8 mm width (FULI catalog). Quote.
25580 specifications
| Cone bore d | 44.45 mm (1.750 in) |
|---|---|
| Cone width B | 25.4 mm |
| Matching cup | 25520 |
| Cup outside diameter D | 82.931 mm (3.265 in) |
| Total width T | 23.8 mm (0.937 in) — assembled width of cup and cone |
| Seal / shield options | Open (cup and cone, no seals) |
| Material | GCr15 chrome bearing steel (rings and rolling elements) |
| 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. |
25580 cone and cup pairs
| Cone | Cup | Bore d | OD D | Width T |
|---|---|---|---|---|
| 25580 | 25520 | 44.45 mm (1.750 in) | 82.931 mm (3.265 in) | 23.8 mm (0.937 in) |
Dimensions from FULI's catalog. A cone (inner ring with rollers and cage) and a cup (outer ring) make up one bearing; the pairs above are the matching numbers listed in FULI's catalog.
How to read the 25580 designation
| Segment | Meaning |
|---|---|
| 2 | Spherical roller bearing (double row, self-aligning) |
| 55 | Dimension series 55 |
| 80 | Bore code 80 → 44.45 mm bore. ISO bore code (00–03 = 10/12/15/17 mm; 04 and above = code × 5 mm). |
25580 interchange
25580 is an inch tapered roller bearing cone. Inch tapered roller bearings are ordered by cone number and cup number. Most makers use the same cone and cup numbers for the same size, but always check the cup number as well. Send us the numbers on your old bearing and we confirm the match before quoting.
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.
25580 compared with nearby cone sizes
The 25580 cone has a 44.45 mm (1.750 in) bore and a cone width of 25.4 mm. FULI's catalog pairs it with cup 25520 (82.931 mm outside diameter, 23.8 mm total width).
The next smaller cone on this site is LM501349, with a 41.275 mm bore (3.18 mm smaller) and cup LM501310.
The next larger is 460, with a 44.45 mm bore (0 mm larger) and cup 453A.
Cup 25520 is also listed with 25590 and 25581, so the same housing bore can take a different cone if the shaft size changes.
The metric tapered bearing on this site closest in bore is 32009 (45 × 75 × 20 mm). Its sizes differ from the 25580 pair, so the two are not interchangeable; it is given only as a size reference.
| Cone | Cup | d × D × T | Cr (kN) |
|---|---|---|---|
| 342A | 332 | 41.275 × 80 × 28.575 mm | 69.6 |
| 3877 | 3820 | 41.275 × 85.725 × 30.162 mm | 105.1 |
| LM501349 | LM501310 | 41.275 × 73.431 × 19.558 mm | 56.1 |
| 25580 | 25520 | 44.45 × 82.931 × 23.8 mm | — |
| 460 | 453A | 44.45 × 107.95 × 27.783 mm | 118.2 |
| LM102949 | LM102910 | 45.242 × 73.431 × 19.558 mm | 55.6 |
| LM603049 | LM603012 | 45.242 × 77.788 × 21.43 mm | 57.4 |
Sizes and Cr from FULI's catalog; — = not listed on this site.
25580 load ratings
Load ratings for 25580 are not listed on this page; ask us and we send them with the quotation.
25580 size in inches and millimetres
25580 is made to inch sizes. The 44.45 mm bore is 1-3/4 in. The millimetre values in the catalog are conversions of the inch sizes.
| Dimension | Millimetres | Inches |
|---|---|---|
| Cone bore d | 44.45 mm | 1.7500 in |
| Cup outside diameter D (25520) | 82.931 mm | 3.2650 in |
| Total width T | 23.8 mm | 0.9370 in |
| Cone width B | 25.4 mm | 1.0000 in |
| Cup width C | 19.05 mm | 0.7500 in |
Converted at 1 in = 25.4 mm and rounded to four decimals.
Mounting 25580 (general guidance)
General guidance, not a FULI specification: on a turning shaft the cone is a tight fit on the shaft and the cup a lighter fit in the housing, so the cup can be moved when the bearing pair is adjusted. Inch bearing fits are given as shaft and housing limits in inches in the bearing makers' tables; follow the drawing of your machine.
Tapered roller bearings carry radial load and axial load in one direction, so 25580 is normally used as one of a pair, and the end play or preload is set at mounting.
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).
Grease for 25580
FULI supplies tapered roller bearings rust-protected and normally without grease; grease is packed in when the bearing is mounted. Relubricating 25580/25520 from the side takes about 9.87 g each time by the formula in our grease calculator: 0.005 × D × T = 0.005 × 82.93 × 23.8.
How FULI supplies 25580
25580 is supplied as a cone, as a cup or as a complete cone and cup pair, as your order states. Where an order states a requirement for the total width T (23.8 mm for 25580/25520), each set is checked on a height gauge before packing.
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 give only one number are the usual cause of a wrong quote, so write both the cone and the cup number, for example 25580/25520.
Tools and guides for 25580
Typical applications
- Vehicle wheel hubs and axles
- Gearboxes and reducers
- Agricultural machinery
- Conveyor pulleys
FAQ
What size is 25580 in mm?
The 25580 cone has a 44.45 mm bore (1.750 in). With cup 25520 the bearing is 44.45 × 82.931 × 23.8 mm (d × D × T).
What is the difference between 25580 and 460?
460 has a 44.45 mm bore against 44.45 mm for 25580, and pairs with cup 453A (44.45 × 107.95 × 27.783 mm) instead of 25520 (44.45 × 82.931 × 23.8 mm). The two are not interchangeable; order by the numbers on the old cone and cup.
How much grease does 25580/25520 need?
About 9.87 g each time it is relubricated from the side (0.005 × 82.93 × 23.8). FULI ships it rust-protected without grease, so the first fill is made at mounting.
Which cup goes with the 25580 cone?
FULI's catalog pairs the 25580 cone with cup 25520. Tell us whether you need the cone, the cup or both when you send the inquiry.
Is 25580 the same size across brands?
25580 is an inch tapered roller bearing cone number. Most makers use the same cone and cup numbers for the same size, but check the cup number too. Send us the numbers on your old bearing and we confirm the match.
Where are the load ratings for 25580?
Load ratings for 25580 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.