Timken27689/27620RBTapered Roller Bearing Cone and Snap-Ring Cup Set – 3.2813 in Bore, 4.9375 in Outside Diameter, 1.0001 in Assembled Width

Product Description

What this part is:

Timken 27689/27620RB inch tapered roller bearing, supplied as a matched cone and snap-ring cup. Unit Quantity: 2 Pc, one 27689 cone and one 27620RB snap-ring cup, the complete single-row tapered set. Cone Part Number: 27689. Cup Part Number: 27620RB. Base Number: 27689.

Decoding the designation:

27689 — the cone, the inner ring with its roller and cage assembly, 3.2813 in bore.

27620 — the cup, the outer race that carries the matching raceway, 4.9375 in outside diameter.

RB — the TSRB snap-ring cup execution. The cup outside diameter carries a machined groove and a snap ring, which locates the cup axially in a through-bored housing.

Specifications:

Bore Diameter: 3.2813 in (83.345 mm). Outside Diameter: 4.9375 in (125.413 mm). Overall Width: 1.0001 in (25.403 mm) assembled. Item Weight: 1.00 kg (2.30 lb). Dynamic Load Rating: 117,000 N at one million revolutions. Static Load Rating: 178,000 N. Dynamic Radial Rating at 90 million revolutions: 30,400 N. Dynamic Axial Rating at 90 million revolutions: 21,600 N. K Factor: 1.4. e Factor: 0.42. Y Factor: 1.44. G1 Factor: 98.2. G2 Factor: 41.8. Geometry Factor (Cg): 0.120. Series: 27600. Design Units: Imperial. Rolling Elements: Tapered Roller. Number Of Rows: 1. Bore Type: Straight. Bearing Material: Case-Carburized Steel.

Dimensions and mounting:

Cone Width: 1.0000 in. Cup Width: 0.7813 in. Effective Center Location: 0.02 in. Shaft Backing Shoulder Diameter, frontface: 3.54 in. Shaft Backing Shoulder Diameter, backface: 3.54 in. Housing Backing Shoulder Diameter, frontface: 4.75 in. Housing Backing Shoulder Diameter, backface: 4.53 in. Maximum Shaft Fillet Radius cleared by the bearing corner: 0.030 in. Maximum Housing Fillet Radius cleared by the bearing corner: 0.06 in. Cage Location relative to backface: 0.05 in. Cage Location relative to frontface: 0.09 in.

Compatibility and replacement:

The cone number 27689 is an industry-standard inch taper designation and carries across makers. Cone cross-references: SKF 27689, FAG K-27689, NTN 4T-27689, Koyo 27689, Fersa 27689. The snap-ring groove is specific to the RB cup execution, so the Timken 27689/27620 set shares the raceways and envelope while locating differently. Search forms: 27689/27620RB, 27620-RB, 27620 RB, 27689 27620RB, 27689/27620, TSRB snap ring cup.

Frequently asked questions:

What is included in the Timken 27689/27620RB?

One 27689 cone and one 27620RB snap-ring cup.

What size is it?

3.2813 in (83.345 mm) bore, 4.9375 in (125.413 mm) outside diameter, 1.0001 in (25.403 mm) assembled width.

What are the load ratings?

Dynamic 117,000 N and static 178,000 N.