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Deep Groove Ball Bearings: The Industry Default and When to Reach for Something Else
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Inch tapered roller bearing set, 6.2500 x 8.875 x 1.6250 in, Series 46700. Flanged cup for a through-bored housing. K factor 1.52, 303 kN dynamic.
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| MFR / Brand | Timken |
|---|---|
| MPN | 46780/46720-B |
| Model | 46780/46720-B |
| Bearing Type | Tapered Roller Bearing Assembly, Open |
| ID | 6.2500 in (158.750 mm) |
| OD | 8.875 in (225.425 mm) |
| Width | 1.6250 in (41.275 mm) |
| Material | Bearing Steel |
|---|---|
| Series | 46700 |
| Lubricant | Oil/Grease |
| Base Number | 46780/46720 |
| Industry Terms | tapered roller bearing set; TSF bearing; flanged cup taper bearing; cone and cup set; inch taper roller bearing; 46700 series taper |
| Total Width | 1.6250 in (41.275 mm) total; cone width B 1.5625 in, cup width C 1.3125 in |
| Bore Shaft Size | 6.2500 in (158.750 mm) |
| Mpn Variants | 46780/46720B; 46780-46720-B; 46780 46720 B; 46780/46720-B; 46720B; 46720-B; 46780 |
| Dynamic Load Rating C1 | 68,200 lbf (303,000 N) |
| Additional Attributes | Cone 46780; Cup 46720-B; e factor 0.38; K factor 1.52; Y factor 1.57; C90 17,700 lbf (78,600 N); Ca90 11,600 lbf (51,600 N); G1 572; G2 133; Cg 0.143; da 6.65 in; db 6.93 in; Da 8.63 in; max shaft fillet 0.14 in; max housing fillet 0.130 in; cage location relative to frontface Ab 0.12 in; outer ring flange O.D. 9.0898 in; outer ring flange width 0.2188 in; effective centre location 0.1 in |
| Closure Type | Open |
| Cage Type | Stamped |
| Dynamic Load Rating | 68,200 lbf (303,000 N) C1 |
| Static Load Rating | 143,000 lbf (635,000 N) C0 |
| Rolling Elements | Tapered Rollers |
| Item Weight | 11.40 lbs |
| Cage Material | Steel |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Snap Ring Included | No |
| Harmonization Code | 8482.20.00.00 |
| Design Units | Inch |
| Part Number | 46780/46720-B |
| Cross Reference 1 | NTN 46780/46720 (same cone; plain cup without flange) |
|---|---|
| Cross Reference 2 | SKF 46780/46720 (same cone; plain cup without flange) |
| Cross Reference 3 | KOYO 46780/46720 (same cone; plain cup without flange) |
| Cross Reference 4 | Bower 46780/46720 (same cone; plain cup without flange) |
| Cross Reference 5 | NSK 46780/46720 (same cone; plain cup without flange) |
| Cross Reference 6 | Timken 46720 (related size, unflanged cup, seats against a machined housing shoulder) |
Timken 46780/46720-B inch-series tapered roller bearing assembly in the TSF configuration — Tapered Single with Flange. Cone part number 46780, flanged cup part number 46720-B.
Bore: 6.2500 in (158.750 mm)
Outside Diameter: 8.875 in (225.425 mm)
Total Width: 1.6250 in (41.275 mm)
Inner Ring Width (B): 1.5625 in (39.688 mm)
Outer Ring Width (C): 1.3125 in (33.338 mm)
Outer Ring Flange O.D. (D1): 9.0898 in (230.881 mm)
Outer Ring Flange Width (C2): 0.2188 in (5.558 mm)
Bore Type: Straight
Base Number: 46780/46720
Series: 46700
Design Units: Inch
Item Weight: 11.400 lb (5.2 kg)
Dynamic Radial Load Rating (C1, 1 million revolutions): 68,200 lbf (303,000 N)
Dynamic Radial Load Rating (C90, 90 million revolutions): 17,700 lbf (78,600 N)
Dynamic Axial Rating (Ca90): 11,600 lbf (51,600 N)
Static Radial Load Rating (C0): 143,000 lbf (635,000 N)
K Factor: 1.52
e Factor: 0.38
Y Factor: 1.57
G1 Factor: 572
G2 Factor: 133
Geometry Factor (Cg): 0.143
The K factor of 1.52 fixes the ratio of radial to thrust capacity set by the raceway angle. The e and Y factors convert a combined radial and thrust load into the equivalent radial load used for life calculation. Cg feeds the lubrication life adjustment factor a3l.
Bearing Type: Tapered Roller Bearing Assembly — TSF (Tapered Single with Flange)
Rolling Elements: Tapered rollers
Number Of Rows: 1
Cage Type: Stamped
Cage Material: Steel
Seal Type: Open
Closure Type: Open
Material: Bearing steel
Lubricant: Oil or grease
Snap Ring Included: No
Shaft Backing Shoulder Diameter, Frontface (da): 6.65 in (169 mm)
Shaft Backing Shoulder Diameter, Backface (db): 6.93 in (176 mm)
Housing Backing Shoulder Diameter, Frontface (Da): 8.63 in (218.95 mm)
Maximum Shaft Fillet Radius: 0.14 in (3.600 mm)
Maximum Housing Fillet Radius: 0.130 in (3.30 mm)
Cage Location Relative To Frontface (Ab): 0.12 in (3 mm)
Effective Centre Location: 0.1 in (2.5 mm) outside the cone backface
The flanged cup locates axially against the face of a through-bored housing.
Unit Quantity: 1 Pc (2-piece assembly: 1 cone + 1 flanged cup)
One 46780 cone carrying the rollers and cage, and one 46720-B flanged cup.
Searchable forms of the designation: 46780/46720B, 46780-46720-B, 46780 46720 B, 46720-B, 46720B, 46780.
Cross-Reference 1: NTN 46780/46720 (same cone; plain cup without flange)
Cross-Reference 2: SKF 46780/46720 (same cone; plain cup without flange)
Cross-Reference 3: KOYO 46780/46720 (same cone; plain cup without flange)
Cross-Reference 4: Bower 46780/46720 (same cone; plain cup without flange)
Cross-Reference 5: NSK 46780/46720 (same cone; plain cup without flange)
Cross-Reference 6: Timken 46720 (related size, unflanged cup, seats against a machined housing shoulder)
Country of Origin: United States
Harmonization Code: 8482.20.00.00
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