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Large tapered roller bearing cone — inner ring with rollers and cage, the -X component of the 240-8240 bearing assembly. Cone only: the matching cup is a separate component.
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| MFR / Brand | Caterpillar |
|---|---|
| Model | 2408240 |
| Bearing Type | Tapered Roller Bearing Cone |
| ID | 8.25 in |
| OD | 12.5 in |
| Material | Steel |
|---|---|
| Condition | New Other (see details) |
| Base Number | 240-8240 |
| Industry Terms | bearing cone, cone assembly, inner race, taper cone, TRB cone, cone only, CAT bearing, final drive bearing |
| Application Types | Caterpillar heavy equipment - final drives, wheel ends and large shaft positions on earthmoving and mining machinery |
| Condition Note | Made In USA, New Old Stock, Stained - See Pictures |
| Bore Shaft Size | Approximately 8-1/4 to 8-1/2 in |
| Replacement Insert | Mating cup: 240-8240-Y (2408240Y) |
| Mpn Variants | 240-8240-X, 2408240X, 240 8240 X, 2408240-X, 240-8240X |
| Manufacturer Status | Caterpillar proprietary bearing number, dealer-channel special order. CAT bearings are built to Caterpillar specification by Timken, NTN and other makers. |
| Compatible With Replaces | Component of the Caterpillar 240-8240 tapered roller bearing assembly. Dimensional matching by a bearing engineer is the route to a non-CAT equivalent. |
| Additional Attributes | Caterpillar component suffix convention on this assembly: -X = cone (inner ring with rollers and cage), -Y = cup (outer ring), bare 240-8240 = complete cone-and-cup assembly. Condition: new old stock with storage staining visible in the photographs, surface discolouration. |
| Item Weight | Not specified |
| Number Of Rows | 1 |
| Design Units | Inch |
| Part Number | 240-8240-X |
| Cross Reference 1 | 240-8240 (parent complete assembly) |
|---|---|
| Cross Reference 2 | 240-8240-Y (mating cup) |
| Cross Reference 3 | 2408240 (assembly, unseparated form) |
| Cross Reference 4 | 2408240Y (cup, unseparated form) |
This is the tapered roller bearing cone from Caterpillar’s 240-8240 bearing assembly — the inner ring complete with its tapered roller set and cage. The trailing -X is Caterpillar’s component suffix for the cone half of the assembly. The cup half carries the -Y suffix, and the bare number 240-8240 refers to the complete cone-and-cup assembly.
Cone only. Tapered roller bearings are separable by design, with the cup pressed into the housing and the cone onto the shaft.
240-8240: Caterpillar part number for the complete tapered roller bearing assembly.
-X: the cone, the inner ring with rollers and cage. This listing.
-Y: the cup, the outer ring, the other half of the assembly.
2408240X: the same number written without separators.
Caterpillar does not manufacture bearings. CAT-numbered bearings are built to Caterpillar’s specification by Timken, NTN and other makers, then carry a Caterpillar part number rather than the maker’s. They are classed as special order through Caterpillar dealers.
Bore: approximately 8-1/4 to 8-1/2 in.
Mating cup outside diameter: approximately 12-1/2 in.
New old stock, made in USA, with staining visible in the photographs. The staining is surface discolouration from long storage.
The cone mounts onto the shaft with an interference fit.
Tapered roller bearings carry no built-in internal clearance. Operating endplay or preload is created at assembly by how far the cone is drawn up against the cup.
Cross-references: 240-8240-X, 2408240X, 240 8240 X, 2408240-X. Parent assembly: 240-8240 (2408240). Mating cup: 240-8240-Y (2408240Y).
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