LM603049 Bearing Dimensions
LM603049 inch tapered roller bearing cone, paired with the LM603012 cup: 45.242 mm (1.781 in) bore, 77.788 mm OD, 21.43 mm width (FULI catalog). Quote.
LM603049 specifications
| Cone bore d | 45.242 mm (1.781 in) |
|---|---|
| Cone width B | 19.842 mm |
| Matching cup | LM603012 |
| Cup outside diameter D | 77.788 mm (3.063 in) |
| Total width T | 21.43 mm (0.844 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 |
LM603049 cone and cup pairs
| Cone | Cup | Bore d | OD D | Width T | Cr (kN) | C0r (kN) |
|---|---|---|---|---|---|---|
| LM603049 | LM603012 | 45.242 mm (1.781 in) | 77.788 mm (3.063 in) | 21.43 mm (0.844 in) | 57.4 | 73.5 |
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 LM603049 designation
| Segment | Meaning |
|---|---|
| LM | Prefix LM: light-medium series (inch tapered roller bearing numbering) |
| 603049 | Series and part number of the cone; the matching cup has its own number, listed in the pairs table on this page |
LM603049 interchange
LM603049 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.
LM603049 compared with nearby cone sizes
The LM603049 cone has a 45.242 mm (1.781 in) bore and a cone width of 19.842 mm. FULI's catalog pairs it with cup LM603012 (77.788 mm outside diameter, 21.43 mm total width).
The next smaller cone on this site is LM102949, with a 45.242 mm bore (0 mm smaller) and cup LM102910.
The next larger is 25581, with a 45.618 mm bore (0.38 mm larger) and cup 25520.
The metric tapered bearing on this site closest in bore is 32009 (45 × 75 × 20 mm). Its sizes differ from the LM603049 pair, so the two are not interchangeable; it is given only as a size reference.
| Cone | Cup | d × D × T | Cr (kN) |
|---|---|---|---|
| 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 |
| 25581 | 25520 | 45.618 × 82.931 × 23.812 mm | 77.9 |
| 25590 | 25522 | 45.618 × 83.058 × 23.876 mm | 78.3 |
| 28580 | 28521 | 50.8 × 92.075 × 24.6 mm | 86.3 |
Sizes and Cr from FULI's catalog; — = not listed on this site.
LM603049 load ratings
LM603049/LM603012 has a dynamic load rating Cr of 57.4 kN and a static rating C0r of 73.5 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.
LM603049 size in inches and millimetres
LM603049 is made to inch sizes. The 45.242 mm bore is 1.7812 in; the nearest common fraction is 1-3/4 in (44.45 mm). The millimetre values in the catalog are conversions of the inch sizes.
| Dimension | Millimetres | Inches |
|---|---|---|
| Cone bore d | 45.242 mm | 1.7812 in |
| Cup outside diameter D (LM603012) | 77.788 mm | 3.0625 in |
| Total width T | 21.43 mm | 0.8437 in |
| Cone width B | 19.842 mm | 0.7812 in |
| Cup width C | 16.667 mm | 0.6562 in |
Converted at 1 in = 25.4 mm and rounded to four decimals.
Mounting LM603049 (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 LM603049 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 LM603049
FULI supplies tapered roller bearings rust-protected and normally without grease; grease is packed in when the bearing is mounted. Relubricating LM603049/LM603012 from the side takes about 8.33 g each time by the formula in our grease calculator: 0.005 × D × T = 0.005 × 77.79 × 21.43.
How FULI supplies LM603049
LM603049 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 (21.43 mm for LM603049/LM603012), 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 LM603049/LM603012.
Tools and guides for LM603049
Typical applications
- Vehicle wheel hubs and axles
- Gearboxes and reducers
- Agricultural machinery
- Conveyor pulleys
FAQ
What size is LM603049 in mm?
The LM603049 cone has a 45.242 mm bore (1.781 in). With cup LM603012 the bearing is 45.242 × 77.788 × 21.43 mm (d × D × T).
What is the difference between LM603049 and 25581?
25581 has a 45.618 mm bore against 45.242 mm for LM603049, and pairs with cup 25520 (45.618 × 82.931 × 23.812 mm) instead of LM603012 (45.242 × 77.788 × 21.43 mm). The two are not interchangeable; order by the numbers on the old cone and cup.
How much grease does LM603049/LM603012 need?
About 8.33 g each time it is relubricated from the side (0.005 × 77.79 × 21.43). FULI ships it rust-protected without grease, so the first fill is made at mounting.
Which cup goes with the LM603049 cone?
FULI's catalog pairs the LM603049 cone with cup LM603012. Tell us whether you need the cone, the cup or both when you send the inquiry.
Is LM603049 the same size across brands?
LM603049 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.