Deep Groove Ball Bearings: The Industry Default and When to Reach for Something Else
If you pulled a bearing off general industrial equipment at random, there’s a good chance
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Single-row tapered roller bearing cone and cup set, 8.250 in bore, 12.500 in outside diameter, 2.6377 in width. Alloy steel, complete matched assembly.
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Here are some other options that might fit your project — cross-referenced equivalents and similar parts we have in stock and ready to ship. Need help choosing? Call 585-295-7880.
Large Tapered Roller Bearing Cone, Inner Ring with Rollers and Cage, Cone Only (-X Component of the 240-8240 Assembly)$305.11
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Single-Row Imperial Tapered Roller Bearing Cone – 3 in Bore, 1.172 in Width, K Factor 1.31$40.79
Tapered Roller Bearing Cone - 2-1/2 in Bore, 1.5100 in Cone Width, HM212000 Series$42.48| MFR / Brand | Caterpillar |
|---|---|
| Model | 2408240 |
| Bearing Type | Tapered Roller Bearing Cone |
| ID | 8.25 in |
| OD | 12.5 in |
| Width | 2.6377 in |
| Material | Steel |
|---|---|
| Base Number | 240-8240 |
| Industry Terms | cone and cup set, taper bearing set, complete tapered roller bearing, CAT bearing, final drive bearing, wheel bearing set |
| Mounting Position | Drivetrain — differentials — differential bearings |
| Bore Shaft Size | 8.250 in (209.550 mm) |
| Mpn Variants | 240-8240, 2408240, 240 8240, 240-8240-X, 240-8240-Y, 2408240X, 2408240Y, 240 8240 X, 240 8240 Y |
| Manufacturer Status | Caterpillar proprietary bearing number, dealer-channel special order. Built to Caterpillar specification by Timken, NTN and other makers. Current in the Cat parts catalogue. |
| Compatible With Replaces | Caterpillar 240-8240 tapered roller bearing assembly. Fits the differential bearing position on Caterpillar 772, 772G and 772G OEM off-highway and quarry trucks. |
| Arrangement Configuration | Single row, separable cone and cup - both halves included |
| 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. Bore 8.250 in / 209.550 mm. Outside diameter 12.500 in / 317.500 mm. Width 2.6377 in / 67.000 mm. Material alloy steel. Condition: new old stock, made in USA. |
| Item Weight | Not specified |
| Number Of Rows | 1 |
| Internal Clearance | None built in; tapered roller bearing endplay or preload is set at assembly |
| Design Units | Inch |
| Bearing Material | Alloy steel |
| Part Number | 240-8240 |
| Cross Reference 1 | 240-8240-X (cone component) |
|---|---|
| Cross Reference 2 | 240-8240-Y (cup component) |
| Cross Reference 3 | 2408240 (unseparated form) |
Caterpillar 240-8240 single-row tapered roller bearing assembly, supplied as a complete cone and cup set. Bore: 8.250 in (209.550 mm). Outside Diameter: 12.500 in (317.500 mm). Width: 2.6377 in (67.000 mm). Material: alloy steel. Condition: new old stock, made in USA.
Caterpillar component suffixes on this assembly. 240-8240-X is the cone — the inner ring with its tapered roller set and cage. 240-8240-Y is the cup — the outer ring. The bare number 240-8240 denotes the complete cone-and-cup assembly. Searchable forms: 2408240, 240 8240, 2408240X, 2408240Y.
One complete bearing: one cone (240-8240-X) and one cup (240-8240-Y). Single row, separable design. Both halves ship together, so the cup and cone raceways run as a matched pair from new.
A 209.550 mm bore on a 317.500 mm outside diameter and 67.000 mm width places this in the large drivetrain size class. Single-row tapered geometry carries heavy combined radial and thrust load in one direction, which is why Caterpillar specifies it in opposed pairs at differentials and wheel ends. Rings and rollers are alloy steel.
Caterpillar 772, 772G and 772G OEM off-highway and quarry trucks. Position: differential bearing, drivetrain group.
Bore: 8.250 in (209.550 mm). Outside Diameter: 12.500 in (317.500 mm). Width: 2.6377 in (67.000 mm). Tapered roller bearings carry no built-in internal clearance.
Caterpillar-numbered bearings are built to Caterpillar specification by Timken, NTN and other makers, and carry a Caterpillar number in place of the maker’s own. Distribution is through Caterpillar dealers as a special-order part. Cross-references: 240-8240, 2408240, 240 8240, 240-8240-X (cone), 240-8240-Y (cup), 2408240X, 2408240Y.
Central Surplus also stocks a second complete 240-8240 set under SKU BE6#OSOXGD and the cone on its own under SKU BJ4#8V4NZQ.
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