store 
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
Availability:
1 in stock
Tapered roller bearing cone, 1-7/8 in (47.625 mm) bore x 1.193 in wide, inch series, case carburized steel. Mates with NTN cups 3720 or 3730. 2 Pcs.
List Price
$33.63
1 in stock
On the Shelf & Ready to Ship
On all orders
No Risk, No Hassle
| MFR / Brand | NTN |
|---|---|
| MPN | 3778 |
| Model | 3778 |
| Bearing Type | Tapered Roller Bearing Cone, Open |
| ID | 1.8750 in (47.625 mm) |
| Width | 1.1930 in (30.302 mm) |
| Series | 3700 |
|---|---|
| Material | Case carburized steel |
| Overall Width | 1.1930 in (30.302 mm) |
| Country Region Of Manufacture | Japan |
| Retaining Feature | Roller |
| Mpn Variants | 3778, 4T-3778 |
| Compatible With Replaces | Mates with NTN cups 3720, 3730 |
| Rolling Elements | Tapered Roller |
| Item Weight | 0.599 kg (1.32 lb) |
| Number Of Rows | 1 |
| Industry Terms | tapered roller bearing cone; inner ring and roller assembly; 1-7/8 in bore cone; inch tapered cone; 3778 cone |
| Common Misspellings | NTN 3788; NTN 3778 cone; N.T.N. 3778; NTN-3778; NTN 37-78 |
| Application Types | Gearboxes; Axle and wheel hubs; Industrial machinery; Agricultural equipment |
| Cross Reference 1 | Timken 3778 |
|---|---|
| Cross Reference 2 | Koyo 3778 |
| Cross Reference 3 | NSK 3778 |
| Cross Reference 4 | Bower 3778 |
NTN 3778 is an inch-series tapered roller bearing cone: the inner ring with its roller and cage assembly. Cone only, no cup. Unit Quantity: 2 Pcs, two cones. Bore Diameter: 1.8750 in (47.625 mm). Cone Width: 1.1930 in (30.302 mm). Material: Case carburized steel. Matching cups: NTN 3720 or 3730.
3778 — inch-series cone number, 1-7/8 in bore, 3700 series.
Bore Diameter: 1.8750 in (47.625 mm). Cone Width: 1.1930 in (30.302 mm). Material: Case carburized steel. Series: 3700. Rolling Elements: Tapered Roller. Number Of Rows: 1. Item Weight: 0.599 kg (1.32 lb) per cone. Unit Quantity: 2 Pcs.
Cone Back Fillet Radius R: 6.4 mm. Shaft Backing Diameter U: 67 mm. Cone Front Backing Diameter V: 55 mm. Effective Load Center a: -8.1 mm.
Same inch-series cone number: Timken 3778, Koyo 3778, NSK 3778, Bower 3778. Mating cups per NTN: 3720, 3730.
1.8750 in (47.625 mm) bore and 1.1930 in (30.302 mm) cone width.
NTN lists cups 3720 and 3730 as mating cups.
No. The 3778 is the cone only: the inner ring with its rollers and cage.
$43.38
64 in stock
$137.64
92 in stock
If you pulled a bearing off general industrial equipment at random, there’s a good chance
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
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
