Timken3879/3820ATapered Roller Bearing Assembly, 1.5748 in Bore, 3.3750 in OD

Product Description

What this part is:

Timken 3879/3820A inch tapered roller bearing, single row TS type, supplied as a matched cone and cup. Unit Quantity: 2 Pcs, one 3879 cone assembly (inner ring, tapered rollers and pressed steel cage) and one 3820 cup. Manufacturer: Timken. Cone Part Number: 3879. Cup Part Number: 3820. Base Number: 3879/3820.

Decoding the designation:

3879 — Timken cone number, 3800 inch series.

3820 — the matching Timken cup. Timken names this bearing by the cone and cup pair.

Specifications:

Series: 3800. Number of Rows: 1. Rolling Elements: Tapered Rollers. Design Units: Inch. Bore Type: Straight. Closure Type: Open. Cage Type: Pressed steel. Cage Material: Steel. Bearing Material: Case-Carburized Steel. Item Weight: 1.8 lb (0.8 kg). Dynamic Radial Load Rating C1, ISO method at 1 million revolutions: 27,900 lbf (124,000 N). Dynamic Radial Load Rating C90, Timken method at 90 million revolutions: 7,240 lbf (32,200 N). Dynamic Axial Rating Ca90: 4,980 lbf (22,200 N). Static Radial Load Rating C0: 33,200 lbf (148,000 N). e Factor: 0.40. K Factor: 1.45. Y Factor: 1.49. G1 Factor: 37.8. G2 Factor: 13.5. Geometry Factor Cg: 0.0873. The ratings are for the complete single-row assembly. Harmonization Code: 8482.20.00.

Dimensions and mounting:

Bore: 1.5748 in (40 mm). Outside Diameter: 3.3750 in (85.725 mm). Assembled Width: 1.1875 in (30.163 mm). Inner Ring Width: 1.1875 in (30.163 mm). Outer Ring Width: 0.9375 in (23.813 mm). Effective Center Location: -0.32 in (-8.1 mm). Maximum Shaft Fillet Radius: 0.030 in (0.8 mm). Maximum Housing Fillet Radius: 0.130 in (3.30 mm). Shaft Backing Shoulder Diameter, frontface (da): 1.97 in (50 mm). Shaft Backing Shoulder Diameter, backface (db): 2.01 in (51 mm). Housing Backing Shoulder Diameter, frontface (Da): 3.23 in (82.00 mm). Housing Backing Shoulder Diameter, backface (Db): 2.87 in (72.90 mm). Cage Location relative to the backface (Aa): 0.04 in (1 mm). Cage Location relative to the frontface (Ab): 0.11 in (2.8 mm).

Compatibility and replacement:

Cone 3879 mates with cup 3820. The same cone also runs against the 3821 cup and against the flanged 3820-B cup in a TSF arrangement. Cross-references: SKF 3879/3820, NTN 4T-3879/3820, Bower 3879/3820. Searchable forms of the number: 3879/3820A, 3879 3820-A, 3879/3820, 3879 / 3820, 3879-3820.

Frequently asked questions:

What are the bore, outside diameter and width?

Bore: 1.5748 in (40 mm). Outside Diameter: 3.3750 in (85.725 mm). Assembled Width: 1.1875 in (30.163 mm). The cup width is 0.9375 in (23.813 mm).

What is included in the 2 Pcs?

One 3879 cone assembly with its tapered roller set and pressed steel cage, and one matching 3820 cup. Together they form one complete single-row tapered roller bearing.

What are the load ratings?

Dynamic Radial Load Rating C1 is 27,900 lbf (124,000 N), C90 is 7,240 lbf (32,200 N), and Static Radial Load Rating C0 is 33,200 lbf (148,000 N). These are ratings for the complete assembly.