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Central Surplus Bearing Finder
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
Availability:
2 in stock
Inch tapered roller bearing cone, 6-7/8 in bore, 1-7/8 in width, Class 3 precision. Mates to a 67720 cup. Dynamic radial rating 91,100 lbf C1.
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| MFR / Brand | Timken |
|---|---|
| MPN | NA67787 |
| Model | NA 67787 |
| Bearing Type | Tapered Roller Bearing Cone |
| ID | 6-7/8 in |
| Base Number | 67787 |
|---|---|
| Industry Terms | Tapered roller bearing cone; taper bearing inner ring; TRB cone; two-row cone; TDO cone |
| Common Misspellings | NA67787 3; NA 67787-3; 6778-7; Timkin NA67787; taper bering cone |
| Overall Width | 1.875 in (47.625 mm) |
| Bore Shaft Size | 6.8750 in (174.625 mm) |
| Mpn Variants | NA67787-3; NA67787*3; NA67787#3; NA-67787; NA 67787; 67787-3; 67787 |
| Precision Class | Class 3 |
| Dynamic Load Rating C1 | 91,100 lbf (405,000 N) |
| Additional Attributes | K Factor 1.33; Effective Center Location 0.19 in (4.8 mm); Max Shaft Fillet Radius 0.140 in (3.600 mm); da 7.28 in (185 mm); db 7.56 in (192 mm); Cage Location Aa 0.17 in / Ab 0.11 in; G1 622.3; G2 122.6; Geometry Factor Cg 0.121; Dynamic Axial Rating Ca90 17,800 lbf (79,000 N) |
| Dynamic Load Rating | C90 23,600 lbf (105,000 N) |
| Static Load Rating | 175,000 lbf (779,000 N) |
| Rolling Elements | Tapered rollers |
| Item Weight | 33.34 lb (15.121 kg) |
| Number Of Rows | 1 |
| Part Number | NA67787-3 |
| Cross Reference 1 | 67720 – matching Timken single cup |
|---|---|
| Cross Reference 2 | 67721D – matching Timken TDO double cup |
| Cross Reference 3 | 67720CD – matching Timken TDO double cup |
Timken NA67787-3 inch tapered roller bearing cone — the inner ring, tapered rollers and cage supplied as one non-separable assembly. Cone Bore: 6.8750 in (174.625 mm). Inner Ring Width: 1.875 in (47.625 mm). Number Of Rows: 1. Rolling Elements: Tapered rollers. Item Weight: 33.34 lb (15.121 kg).
NA — cone furnished for two-row and TDO service.
67787 — Timken inch tapered roller cone number, mating to the 67720 single cup.
-3 — Precision Class: Class 3. Tighter running tolerance than standard, giving lower running vibration and closer shaft location. Timken writes the same marking as 67787*3 and 67787#3.
Dynamic Load Rating (C1): 91,100 lbf (405,000 N). Dynamic Load Rating (C90): 23,600 lbf (105,000 N). Dynamic Axial Rating (Ca90): 17,800 lbf (79,000 N). Static Load Rating (C0): 175,000 lbf (779,000 N).
K Factor: 1.33. K converts radial load into the thrust a single tapered row induces, and it sets how much of an opposing row’s capacity the pair consumes. Effective Center Location: 0.19 in (4.8 mm) — the axial point at which the row’s load line crosses the shaft axis, which is where a bearing-span calculation starts.
Max Shaft Fillet Radius: 0.140 in (3.600 mm). Shaft Backing Shoulder Diameter, frontface (da): 7.28 in (185 mm). Shaft Backing Shoulder Diameter, backface (db): 7.56 in (192 mm). Cage Location relative to backface (Aa): 0.17 in (4.3 mm). Cage Location relative to frontface (Ab): 0.11 in (2.8 mm). Geometry Factor (Cg): 0.121. G1 Factor: 622.3. G2 Factor: 122.6.
Cone only. Unit Quantity: 1 Pc. The matching single cup is the Timken 67720. In two-row TDO service the matching double cups are the Timken 67721D and 67720CD.
Searchable forms of the designation: NA67787-3, NA67787*3, NA67787#3, NA-67787, 67787-3, 67787. Precision Class: Class 3. An unsuffixed 67787 shares the same geometry at standard tolerance.
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
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Our team can locate, cross-reference, and source all parts.
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