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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:
2 in stock
Inch tapered roller bearing cone for two-row service, 7.0000 in bore, 2.125 in width, e factor 0.42, K factor 1.41.
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$367.17
2 in stock
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| MFR / Brand | Timken |
|---|---|
| MPN | NA87700 |
| GTIN | 053893426686 |
| Model | NA 87700 |
| Bearing Type | Tapered Roller Bearing Cone |
| ID | 7.0000 in (177.800 mm) |
| Series | 877 |
|---|---|
| Base Number | NA87700 |
| Overall Width | 2.125 in (53.975 mm) |
| Mpn Variants | NA87700; NA-87700; NA 87700; 87700 |
| Compatible With Replaces | Mating double cup: Timken 87112D |
| Precision Class | Not specified |
| Additional Attributes | e Factor 0.42; K Factor 1.41; C90 132,000 N; Ca90 93,900 N; Effective Load Centre 3.8 mm; Max shaft fillet radius 3.5 mm; db 200 mm; Aa 5.3975 mm; Ab -2.69875 mm |
| Rolling Elements | Tapered Roller |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Harmonization Code | 8482.20.00 |
| Part Number | NA87700 |
| Cone Part Number | NA87700 |
| Cone Width | 3.6250 in |
| Cross Reference 1 | Timken 87700 – related size, single-row execution on the same 7.0000 in bore and 877 raceway |
|---|
Timken NA87700 inch tapered roller bearing cone. Bearing Type: Tapered roller bearing cone — the inner ring carrying the tapered rollers and cage as one assembly. Series: 877. Base Number: NA87700. Bore Diameter: 7.0000 in (177.800 mm). Overall Width: 2.125 in (53.975 mm). Bore Type: Straight. Rolling Elements: Tapered Roller. Number Of Rows: 1. GTIN: 053893426686.
NA — Timken service prefix marking a cone furnished for two-row and TDO service. It is a single cone, built to run one row against one raceway of a double cup.
87700 — cone number, 7.0000 in bore. No precision suffix is present, so the tolerance class is Not specified.
Dynamic radial rating at 90 million revolutions (C90): 132,000 N. Dynamic axial rating at 90 million revolutions (Ca90): 93,900 N. e Factor: 0.42. K Factor: 1.41. A K of 1.41 on a 2.125 in wide inner ring gives a cone that carries thrust to roughly seven tenths of its radial rating, which is what a two-row mounting asks of each row.
Effective Load Centre: 3.8 mm. Maximum fillet radius on the mating shaft: 3.5 mm (0.140 in). Shaft Backing Shoulder Diameter, backface (db): 200 mm (7.87 in). Cage location relative to backface (Aa): 5.3975 mm. Cage location relative to frontface (Ab): -2.69875 mm.
Unit Quantity: 1 Pc. Cone only. The matching double cup is the Timken 87112D, which takes two of these cones.
NA87700 is a Timken service-designation cone. The plain 87700 cone shares the 7.0000 in bore and the 877 series raceway, and is built by Koyo and NTN among others; it is the single-row execution of the same size rather than the two-row service part, so treat it as a related size on a two-row mounting.
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