store 
Central Surplus Bearing Finder
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
Availability:
1 in stock
Flanged tapered roller bearing cup, 7.8740 in outside diameter, 1.3750 in width, 8.2500 in flange diameter, Class 3 precision. Mates the 98350 cone.
List Price
$773.76
1 in stock
On the Shelf & Ready to Ship
On all orders
No Risk, No Hassle
| MFR / Brand | Timken |
|---|---|
| MPN | 98788B-3 |
| Model | 98788 B #3 |
| Bearing Type | Tapered Roller Bearing Flanged Single Cup |
| OD | 7.8740 in |
| Series | 98000 |
|---|---|
| Base Number | 98788B |
| Industry Terms | Flanged cup; TSF bearing cup; flanged outer race; taper roller cup with flange; bearing race |
| Common Misspellings | Timkin 98788; 98788 B3; 98788-B3; 98788 cone; flange taper bearing cup |
| Application Types | Gear drive housings; conveyor head and tail shafts; spindle and roll assemblies; heavy machinery through-bored housings |
| Flange Outer Diameter | 8.2500 in (209.55 mm) |
| Cup Flange Width | 0.3750 in (9.53 mm) |
| Housing Style | Flanged cup, face-located in a through-bored housing |
| Mpn Variants | 98788B-3; 98788-B *3; 98788 B #3; 98788B3; 98788B; 98788-B |
| Compatible With Replaces | Mates with Timken 98350 cone to form the 98350/98788B TSF assembly |
| Number Of Rows | 1 |
| Harmonization Code | 8482.20.00 |
| Cup Part Number | 98788-B |
| Cup Width | 1.3750 in (34.93 mm) |
| Part Number | 98788B-3 |
| Cone Part Number | 98350 (mating cone, sold separately) |
Timken 98788B-3 flanged tapered roller bearing cup — the outer race, 7.8740 in cup outside diameter, 1.3750 in cup width, with an integral mounting flange of 8.2500 in outside diameter and 0.3750 in thickness. 98000 imperial series, Class 3 precision. Cup only. The matching cone is the Timken 98350.
98788 is the Timken cup number. The B identifies the flanged execution of that cup, which Timken assembles with the 98350 cone as the TSF configuration — tapered single, flanged cup — designated 98350/98788B. The trailing –3, marked on the carton as *3 or #3, is Timken precision Class 3.
A flanged cup locates itself axially against the face of the housing instead of relying on a bored shoulder or a retaining ring, so the housing can be a through bore and the bearing position is set by the flange face. That simplifies machining and makes the setting repeatable on reassembly. Class 3 tolerances tighten outside diameter, width and running accuracy over standard inch tolerance, which matters on a 7.8740 in cup where a small runout translates into a large shaft deflection at the roller path.
One flanged cup. Single raceway, taking one cone. Case-hardened alloy steel with a hardened raceway and a tough core.
The cup body is a light interference or transition fit in the housing bore, and the flange face bears on the machined housing face, drawn up square. Assembled against a 98350 cone the complete bearing measures 3.5000 in bore by 7.8740 in outside diameter by 2.0772 in total width. Bearing setting to end play or preload is established at the shaft after the cup is clamped.
The 98788B cup number is published to the same ABMA inch designation across tapered roller makers, and the NTN equivalent is the 4T-98788. A plain 98788 without the B is the unflanged cup of the same raceway geometry and is a related item, since it needs a shouldered housing bore rather than a flange face. A 98788-2 or 98788B-20000 is the same cup at a different precision class.
$137.64
92 in stock
$61.18
97 in stock
$144.56
12 in stock
$26.58
199 in stock
Rockwell’s own product page for the Kinetix 6000 is down
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
When an HMI panel goes dark or a PLC module stops communicating, the machine it
If you have ever watched a machine glide smoothly back and forth, tracing a perfect
Our team can locate, cross-reference, and source all parts.
Our team can locate, cross-reference, and source all parts.
Sort
Brand
Price
MPN
Categories
