HM88649 Bearing Dimensions
HM88649 inch tapered roller bearing cone, paired with the HM88610 cup: 34.925 mm (1.375 in) bore, 72.233 mm OD, 25.4 mm width (FULI catalog). Quote.
HM88649 specifications
| Cone bore d | 34.925 mm (1.375 in) |
|---|---|
| Cone width B | 25.4 mm |
| Matching cup | HM88610 |
| Cup outside diameter D | 72.233 mm (2.844 in) |
| Total width T | 25.4 mm (1 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 |
HM88649 cone and cup pairs
| Cone | Cup | Bore d | OD D | Width T | Cr (kN) | C0r (kN) |
|---|---|---|---|---|---|---|
| HM88649 | HM88610 | 34.925 mm (1.375 in) | 72.233 mm (2.844 in) | 25.4 mm (1 in) | 66.5 | 87.3 |
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 HM88649 designation
| Segment | Meaning |
|---|---|
| HM | Prefix HM: heavy-medium series (inch tapered roller bearing numbering) |
| 88649 | Series and part number of the cone; the matching cup has its own number, listed in the pairs table on this page |
HM88649 interchange
HM88649 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.
HM88649 compared with nearby cone sizes
The HM88649 cone has a 34.925 mm (1.375 in) bore and a cone width of 25.4 mm. FULI's catalog pairs it with cup HM88610 (72.233 mm outside diameter, 25.4 mm total width).
The next smaller cone on this site is 25877, with a 34.925 mm bore (0 mm smaller) and cup 25820.
The next larger is LM48548, with a 34.925 mm bore (0 mm larger) and cup LM48510.
The metric tapered bearing on this site closest in bore is 32007 (35 × 62 × 18 mm). Its sizes differ from the HM88649 pair, so the two are not interchangeable; it is given only as a size reference.
| Cone | Cup | d × D × T | Cr (kN) |
|---|---|---|---|
| 2790 | 2720 | 33.338 × 76.2 × 23.812 mm | 75 |
| 14137A | 14276 | 34.925 × 69.012 × 19.845 mm | 48.3 |
| 25877 | 25820 | 34.925 × 73.025 × 23.812 mm | 72.3 |
| HM88649 | HM88610 | 34.925 × 72.233 × 25.4 mm | 66.5 |
| LM48548 | LM48510 | 34.925 × 65.088 × 18.034 mm | 48.2 |
| LM48549 | LM48510 | 34.925 × 65.088 × 18.034 mm | 48.2 |
| 14139 | 14276 | 34.976 × 69.012 × 19.845 mm | 50.6 |
Sizes and Cr from FULI's catalog; — = not listed on this site.
HM88649 load ratings
HM88649/HM88610 has a dynamic load rating Cr of 66.5 kN and a static rating C0r of 87.3 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.
HM88649 size in inches and millimetres
HM88649 is made to inch sizes. The 34.925 mm bore is 1-3/8 in. The millimetre values in the catalog are conversions of the inch sizes.
| Dimension | Millimetres | Inches |
|---|---|---|
| Cone bore d | 34.925 mm | 1.3750 in |
| Cup outside diameter D (HM88610) | 72.233 mm | 2.8438 in |
| Total width T | 25.4 mm | 1.0000 in |
| Cone width B | 25.4 mm | 1.0000 in |
| Cup width C | 19.842 mm | 0.7812 in |
Converted at 1 in = 25.4 mm and rounded to four decimals.
Mounting HM88649 (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 HM88649 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 HM88649
FULI supplies tapered roller bearings rust-protected and normally without grease; grease is packed in when the bearing is mounted. Relubricating HM88649/HM88610 from the side takes about 9.17 g each time by the formula in our grease calculator: 0.005 × D × T = 0.005 × 72.23 × 25.4.
How FULI supplies HM88649
HM88649 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 (25.4 mm for HM88649/HM88610), 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 HM88649/HM88610.
Tools and guides for HM88649
Typical applications
- Vehicle wheel hubs and axles
- Gearboxes and reducers
- Agricultural machinery
- Conveyor pulleys
FAQ
What size is HM88649 in mm?
The HM88649 cone has a 34.925 mm bore (1.375 in). With cup HM88610 the bearing is 34.925 × 72.233 × 25.4 mm (d × D × T).
What is the difference between HM88649 and LM48548?
LM48548 has a 34.925 mm bore against 34.925 mm for HM88649, and pairs with cup LM48510 (34.925 × 65.088 × 18.034 mm) instead of HM88610 (34.925 × 72.233 × 25.4 mm). The two are not interchangeable; order by the numbers on the old cone and cup.
How much grease does HM88649/HM88610 need?
About 9.17 g each time it is relubricated from the side (0.005 × 72.23 × 25.4). FULI ships it rust-protected without grease, so the first fill is made at mounting.
Which cup goes with the HM88649 cone?
FULI's catalog pairs the HM88649 cone with cup HM88610. Tell us whether you need the cone, the cup or both when you send the inquiry.
Is HM88649 the same size across brands?
HM88649 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.