HM212049 Bearing Dimensions
HM212049 inch tapered roller bearing cone, paired with the HM212011 cup: 66.675 mm (2.625 in) bore, 122.238 mm OD, 38.1 mm width (FULI catalog). Quote.
HM212049 specifications
| Cone bore d | 66.675 mm (2.625 in) |
|---|---|
| Cone width B | 38.354 mm |
| Matching cup | HM212011 |
| Cup outside diameter D | 122.238 mm (4.813 in) |
| Total width T | 38.1 mm (1.500 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 |
HM212049 cone and cup pairs
| Cone | Cup | Bore d | OD D | Width T | Cr (kN) | C0r (kN) |
|---|---|---|---|---|---|---|
| HM212049 | HM212011 | 66.675 mm (2.625 in) | 122.238 mm (4.813 in) | 38.1 mm (1.500 in) | 191.3 | 251.1 |
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 HM212049 designation
| Segment | Meaning |
|---|---|
| HM | Prefix HM: heavy-medium series (inch tapered roller bearing numbering) |
| 212049 | Series and part number of the cone; the matching cup has its own number, listed in the pairs table on this page |
HM212049 interchange
HM212049 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.
HM212049 compared with nearby cone sizes
The HM212049 cone has a 66.675 mm (2.625 in) bore and a cone width of 38.354 mm. FULI's catalog pairs it with cup HM212011 (122.238 mm outside diameter, 38.1 mm total width).
The next smaller cone on this site is 3984, with a 66.675 mm bore (0 mm smaller) and cup 3920.
The next larger is 33287, with a 73.025 mm bore (6.35 mm larger) and cup 33462.
The metric tapered bearing on this site closest in bore is 33013 (65 × 100 × 27 mm). Its sizes differ from the HM212049 pair, so the two are not interchangeable; it is given only as a size reference.
| Cone | Cup | d × D × T | Cr (kN) |
|---|---|---|---|
| 395A | 394A | 66.675 × 110 × 22 mm | 88.6 |
| 395S | 394A | 66.675 × 110 × 22 mm | 88.6 |
| 3984 | 3920 | 66.675 × 112.712 × 30.162 mm | 120.2 |
| HM212049 | HM212011 | 66.675 × 122.238 × 38.1 mm | 191.3 |
| 33287 | 33462 | 73.025 × 117.475 × 30.162 mm | 128 |
| 6461A | 6420 | 76.2 × 149.225 × 53.975 mm | — |
| 580 | 572 | 82.55 × 139.992 × 36.512 mm | 176.3 |
Sizes and Cr from FULI's catalog; — = not listed on this site.
HM212049 load ratings
HM212049/HM212011 has a dynamic load rating Cr of 191.3 kN and a static rating C0r of 251.1 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.
HM212049 size in inches and millimetres
HM212049 is made to inch sizes. The 66.675 mm bore is 2-5/8 in. The millimetre values in the catalog are conversions of the inch sizes.
| Dimension | Millimetres | Inches |
|---|---|---|
| Cone bore d | 66.675 mm | 2.6250 in |
| Cup outside diameter D (HM212011) | 122.238 mm | 4.8125 in |
| Total width T | 38.1 mm | 1.5000 in |
| Cone width B | 38.354 mm | 1.5100 in |
| Cup width C | 29.718 mm | 1.1700 in |
Converted at 1 in = 25.4 mm and rounded to four decimals.
Mounting HM212049 (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 HM212049 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 HM212049
FULI supplies tapered roller bearings rust-protected and normally without grease; grease is packed in when the bearing is mounted. Relubricating HM212049/HM212011 from the side takes about 23.3 g each time by the formula in our grease calculator: 0.005 × D × T = 0.005 × 122.24 × 38.1.
How FULI supplies HM212049
HM212049 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 (38.1 mm for HM212049/HM212011), 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 HM212049/HM212011.
Tools and guides for HM212049
Typical applications
- Vehicle wheel hubs and axles
- Gearboxes and reducers
- Agricultural machinery
- Conveyor pulleys
FAQ
What size is HM212049 in mm?
The HM212049 cone has a 66.675 mm bore (2.625 in). With cup HM212011 the bearing is 66.675 × 122.238 × 38.1 mm (d × D × T).
What is the difference between HM212049 and 33287?
33287 has a 73.025 mm bore against 66.675 mm for HM212049, and pairs with cup 33462 (73.025 × 117.475 × 30.162 mm) instead of HM212011 (66.675 × 122.238 × 38.1 mm). The two are not interchangeable; order by the numbers on the old cone and cup.
How much grease does HM212049/HM212011 need?
About 23.3 g each time it is relubricated from the side (0.005 × 122.24 × 38.1). FULI ships it rust-protected without grease, so the first fill is made at mounting.
Which cup goes with the HM212049 cone?
FULI's catalog pairs the HM212049 cone with cup HM212011. Tell us whether you need the cone, the cup or both when you send the inquiry.
Is HM212049 the same size across brands?
HM212049 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.