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Double tapered roller bearing cup (one-piece double outer race), 17-5/8 in outside diameter, 5-3/4 in width, inch HM259000 heavy section. Cup only. Sold as 1 Pc.
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| MFR / Brand | Koyo |
|---|---|
| MPN | HM259010DS1 |
| Model | HM 259010 D S 1 |
| Bearing Type | Tapered Roller Bearing Cup |
| OD | 17-5/8 in |
| Material | Steel |
|---|---|
| Condition | New – Open box |
| Base Number | HM259010D |
| Industry Terms | Double cup, TDO outer race, taper bearing double race, two-row taper cup |
| Common Misspellings | HM25901DS1, HM259010S1, HM 2590 10D |
| Application Types | Rolling mill roll necks, large gear drives, heavy wheel ends |
| Total Width | 5-3/4 in (146.05 mm) |
| Condition Note | Made In Japan, New Old Stock, Surface Rust (See Pictures) HM-259010-D |
| Mpn Variants | HM259010DS1, HM-259010-D-S1, HM 259010 DS1, HM259010D, HM259010 |
| Compatible With Replaces | Seats two HM259048 cones |
| Arrangement Configuration | Double cup only, TDO outer race, takes two cones |
| Number Of Rows | 2 raceways, opposed |
| Design Units | Inch |
| Bearing Material | Case-carburised bearing steel |
| Part Number | HM259010DS1 |
| Cross Reference 1 | Timken HM259010D |
|---|---|
| Cross Reference 2 | NTN HM259010D |
A Koyo HM259010DS1 double tapered roller bearing cup — a one-piece outer race machined with two opposed tapered raceways. Outside diameter 17-5/8 in, width 5-3/4 in.
HM259010 is the ANSI/ABMA inch cup number of the HM259000 heavy section. The D suffix marks the double cup: two raceways in one ring rather than one. S1 is a Koyo internal design-variation code.
A double cup carries both rows of a back-to-back TDO arrangement in a single housing bore, so the two rows share one seat and one machined shoulder. Because the raceways are opposed, the completed arrangement takes thrust in both directions, and the row spacing — and therefore the moment stiffness — is fixed by the cup rather than set at assembly.
Bearing type: double tapered roller bearing cup (one-piece double outer race)Design units: inchOutside diameter: 17-5/8 in (447.68 mm)Width: 5-3/4 in (146.05 mm)Number of raceways: 2, opposedClosure: openMating cones: two HM259048
Double cup only. It seats two cones, both Koyo HM259048. Sold as 1 Pc.
The double cup presses into the housing bore against one square shoulder and locates both rows; the two cones mount separately on the shaft, and total endplay across the pair is set by the shaft nut or a spacer between the cone back faces.
The single HM259010 cup shares the outside diameter but carries one raceway and half the width, which makes it a related size rather than an interchange.
$61.18
97 in stock
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