1779 Bearing Dimensions
1779 inch tapered roller bearing cone, paired with the 1729 cup: 23.812 mm (0.937 in) bore, 56.896 mm OD, 19.368 mm width (FULI catalog). Quote.
1779 specifications
| Cone bore d | 23.812 mm (0.937 in) |
|---|---|
| Cone width B | 19.837 mm |
| Matching cup | 1729 |
| Cup outside diameter D | 56.896 mm (2.240 in) |
| Total width T | 19.368 mm (0.763 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 | See the cone and cup pairs table below |
1779 cone and cup pairs
| Cone | Cup | Bore d | OD D | Width T | Cr (kN) | C0r (kN) |
|---|---|---|---|---|---|---|
| 1779 | 1729 | 23.812 mm (0.937 in) | 56.896 mm (2.240 in) | 19.368 mm (0.763 in) | 40.3 | 42.2 |
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. Values from FULI's catalog; confirm for your application.
How to read the 1779 designation
| Segment | Meaning |
|---|---|
| 1779 | Designation breakdown not available for this model. |
1779 interchange
1779 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.
1779 compared with nearby cone sizes
The 1779 cone has a 23.812 mm (0.937 in) bore and a cone width of 19.837 mm. FULI's catalog pairs it with cup 1729 (56.896 mm outside diameter, 19.368 mm total width).
The next smaller cone on this site is LM12749, with a 21.986 mm bore (1.83 mm smaller) and cup LM12710.
The next larger is 15100, with a 25.4 mm bore (1.59 mm larger) and cup 15245.
The metric tapered bearing on this site closest in bore is 32005 (25 × 47 × 15 mm). Its sizes differ from the 1779 pair, so the two are not interchangeable; it is given only as a size reference.
| Cone | Cup | d × D × T | Cr (kN) |
|---|---|---|---|
| LM11949 | LM11910 | 19.05 × 45.237 × 15.494 mm | 29.4 |
| LM12748 | LM12710 | 21.43 × 45.237 × 15.494 mm | 29.6 |
| LM12749 | LM12710 | 21.986 × 45.237 × 15.494 mm | 29.6 |
| 1779 | 1729 | 23.812 × 56.896 × 19.368 mm | 40.3 |
| 15100 | 15245 | 25.4 × 62 × 19.05 mm | — |
| 15101 | 15244 | 25.4 × 62 × 20.638 mm | 46.8 |
| 15102 | 15245 | 25.4 × 62 × 19.05 mm | 46.8 |
Sizes and Cr from FULI's catalog; — = not listed on this site.
1779 load ratings
1779/1729 has a dynamic load rating Cr of 40.3 kN and a static rating C0r of 42.2 kN in FULI's catalog. The ratings belong to the cone and cup as a pair; a different cup changes them.
Speed limits and weights for inch cones are not listed in the catalog; ask us and we send them with the quotation.
Values from FULI's catalog; confirm for your application.
1779 size in inches and millimetres
1779 is made to inch sizes. The 23.812 mm bore is 15/16 in. The millimetre values in the catalog are conversions of the inch sizes.
| Dimension | Millimetres | Inches |
|---|---|---|
| Cone bore d | 23.812 mm | 0.9375 in |
| Cup outside diameter D (1729) | 56.896 mm | 2.2400 in |
| Total width T | 19.368 mm | 0.7625 in |
| Cone width B | 19.837 mm | 0.7810 in |
| Cup width C | 15.875 mm | 0.6250 in |
Converted at 1 in = 25.4 mm and rounded to four decimals.
Mounting 1779 (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 1779 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 1779
FULI supplies tapered roller bearings rust-protected and normally without grease; grease is packed in when the bearing is mounted. Relubricating 1779/1729 from the side takes about 5.51 g each time by the formula in our grease calculator: 0.005 × D × T = 0.005 × 56.9 × 19.37.
How FULI supplies 1779
1779 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 (19.368 mm for 1779/1729), 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 1779/1729.
Tools and guides for 1779
Typical applications
- Vehicle wheel hubs and axles
- Gearboxes and reducers
- Agricultural machinery
- Conveyor pulleys
FAQ
What size is 1779 in mm?
The 1779 cone has a 23.812 mm bore (0.937 in). With cup 1729 the bearing is 23.812 × 56.896 × 19.368 mm (d × D × T).
What is the difference between 1779 and 15100?
15100 has a 25.4 mm bore against 23.812 mm for 1779, and pairs with cup 15245 (25.4 × 62 × 19.05 mm) instead of 1729 (23.812 × 56.896 × 19.368 mm). The two are not interchangeable; order by the numbers on the old cone and cup.
How much grease does 1779/1729 need?
About 5.51 g each time it is relubricated from the side (0.005 × 56.9 × 19.37). FULI ships it rust-protected without grease, so the first fill is made at mounting.
Which cup goes with the 1779 cone?
FULI's catalog pairs the 1779 cone with cup 1729. Tell us whether you need the cone, the cup or both when you send the inquiry.
Is 1779 the same size across brands?
1779 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.