HM518445 Bearing Dimensions
HM518445 inch tapered roller bearing cone, paired with the HM518410 cup: 88.9 mm (3.500 in) bore, 152.4 mm OD, 39.688 mm width (FULI catalog). Quote.
HM518445 specifications
| Cone bore d | 88.9 mm (3.500 in) |
|---|---|
| Cone width B | 39.688 mm |
| Matching cup | HM518410 |
| Cup outside diameter D | 152.4 mm (6.000 in) |
| Total width T | 39.688 mm (1.563 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 |
HM518445 cone and cup pairs
| Cone | Cup | Bore d | OD D | Width T | Cr (kN) | C0r (kN) |
|---|---|---|---|---|---|---|
| HM518445 | HM518410 | 88.9 mm (3.500 in) | 152.4 mm (6.000 in) | 39.688 mm (1.563 in) | 258.3 | 364.7 |
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 HM518445 designation
| Segment | Meaning |
|---|---|
| HM | Prefix HM: heavy-medium series (inch tapered roller bearing numbering) |
| 518445 | Series and part number of the cone; the matching cup has its own number, listed in the pairs table on this page |
HM518445 interchange
HM518445 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.
HM518445 compared with nearby cone sizes
The HM518445 cone has a 88.9 mm (3.500 in) bore and a cone width of 39.688 mm. FULI's catalog pairs it with cup HM518410 (152.4 mm outside diameter, 39.688 mm total width).
The next smaller cone on this site is 663, with a 82.55 mm bore (6.35 mm smaller) and cup 653.
The next larger is HM218248, with a 89.974 mm bore (1.07 mm larger) and cup HM218210.
The metric tapered bearing on this site closest in bore is 30218 (90 × 160 × 32.5 mm). Its sizes differ from the HM518445 pair, so the two are not interchangeable; it is given only as a size reference.
| Cone | Cup | d × D × T | Cr (kN) |
|---|---|---|---|
| 6461A | 6420 | 76.2 × 149.225 × 53.975 mm | — |
| 580 | 572 | 82.55 × 139.992 × 36.512 mm | 176.3 |
| 663 | 653 | 82.55 × 146.05 × 41.275 mm | 210.4 |
| HM518445 | HM518410 | 88.9 × 152.4 × 39.688 mm | 258.3 |
| HM218248 | HM218210 | 89.974 × 146.975 × 40 mm | 231.1 |
| 594A | 592A | 95.25 × 152.4 × 39.688 mm | 186.9 |
Sizes and Cr from FULI's catalog; — = not listed on this site.
HM518445 load ratings
HM518445/HM518410 has a dynamic load rating Cr of 258.3 kN and a static rating C0r of 364.7 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.
HM518445 size in inches and millimetres
HM518445 is made to inch sizes. The 88.9 mm bore is 3-1/2 in. The millimetre values in the catalog are conversions of the inch sizes.
| Dimension | Millimetres | Inches |
|---|---|---|
| Cone bore d | 88.9 mm | 3.5000 in |
| Cup outside diameter D (HM518410) | 152.4 mm | 6.0000 in |
| Total width T | 39.688 mm | 1.5625 in |
| Cone width B | 39.688 mm | 1.5625 in |
| Cup width C | 30.162 mm | 1.1875 in |
Converted at 1 in = 25.4 mm and rounded to four decimals.
Mounting HM518445 (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 HM518445 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 HM518445
FULI supplies tapered roller bearings rust-protected and normally without grease; grease is packed in when the bearing is mounted. Relubricating HM518445/HM518410 from the side takes about 30.2 g each time by the formula in our grease calculator: 0.005 × D × T = 0.005 × 152.4 × 39.69.
How FULI supplies HM518445
HM518445 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 (39.688 mm for HM518445/HM518410), 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 HM518445/HM518410.
Tools and guides for HM518445
Typical applications
- Vehicle wheel hubs and axles
- Gearboxes and reducers
- Agricultural machinery
- Conveyor pulleys
FAQ
What size is HM518445 in mm?
The HM518445 cone has a 88.9 mm bore (3.500 in). With cup HM518410 the bearing is 88.9 × 152.4 × 39.688 mm (d × D × T).
What is the difference between HM518445 and HM218248?
HM218248 has a 89.974 mm bore against 88.9 mm for HM518445, and pairs with cup HM218210 (89.974 × 146.975 × 40 mm) instead of HM518410 (88.9 × 152.4 × 39.688 mm). The two are not interchangeable; order by the numbers on the old cone and cup.
How much grease does HM518445/HM518410 need?
About 30.2 g each time it is relubricated from the side (0.005 × 152.4 × 39.69). FULI ships it rust-protected without grease, so the first fill is made at mounting.
Which cup goes with the HM518445 cone?
FULI's catalog pairs the HM518445 cone with cup HM518410. Tell us whether you need the cone, the cup or both when you send the inquiry.
Is HM518445 the same size across brands?
HM518445 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.