Timken42350Tapered Roller Bearing Cone – 3.5000 in Bore, 1.1406 in Cone Width, K Factor 1.19, Stamped Steel Cage, Case-Carburized Steel

Product Description

What this part is

A Timken 42350 single cone — the inner ring with its roller and cage assembly — from the imperial 42000 tapered roller bearing series. Cone only. The matching single cups are the Timken 42584 and 42585. Bore is 3.5000 in (88.9 mm) and the inner ring width B is 1.1406 in (28.971 mm). With the mating cup fitted, the assembled bearing outside diameter is 5.8750 in (149.225 mm). The cage is stamped steel and the rings and rollers are case-carburized alloy steel. Cone weight is 9.49 lb (4.306 kg).

Decoding the order code

The full Timken order code for this cone is 42350-30000, where 42350 is the cone number and the -30000 suffix marks a single cone supplied on its own rather than as part of a matched assembly. The same code appears shortened to 42350-3 and run together as 423503. On the cup side the equivalent code is -20024. The cup numbers that share this cone’s raceway angle and roller path are 42584 and 42585.

Load ratings and mounting factors

Per row, the dynamic radial load rating at one million revolutions (C1) is 43400 lbf (193000 N) and at ninety million revolutions (C90) is 11300 lbf (50100 N). The dynamic axial rating Ca90 is 9480 lbf (42200 N) and the static radial load rating C0 is 54300 lbf (241000 N). The K factor is 1.19. Lubrication life adjustment factors are G1 129.7, G2 37.2 and geometry factor Cg 0.139.

Shaft fitting data

The maximum shaft fillet radius cleared by the cone corner is 0.120 in (3 mm). Shaft backing shoulder diameter is 3.86 in (98 mm) at the frontface (da) and 4.09 in (104 mm) at the backface (db). Effective centre location is 0.12 in (3 mm). Cage location relative to the backface (Aa) is 0.1 in (2.5 mm) and relative to the frontface (Ab) is 0.14 in (3.6 mm).

What these specs mean in practice

The K factor of 1.19 reflects the raceway angle and the split between radial and thrust capacity. A lower K means a steeper angle carrying proportionally more thrust; at 1.19 the 42350 sits toward the thrust-capable end of the general-purpose band, and the Ca90 of 9480 lbf against a C90 of 11300 lbf shows how close the axial and radial ninety-million-revolution ratings are on this geometry. Timken rates standard tapered roller bearings of this construction for continuous operation from −54 °C to 120 °C, with oil or grease lubrication.

Quantity and configuration

One piece, one cone with its rollers and cage. Single row, straight bore, open with no seal or shield. Tapered roller bearings of this type are usually mounted in opposing pairs on a shaft so that the pair locates axially in both directions.

Interchange guidance

The 42350 cone number is used directly by Bower and NTN. The 42584 and 42585 single cups are the mating outer races and are separate parts — a cup is a raceway ring with no bore and no seal, and it is ordered by its own number. The 42584 and 42585 differ from one another in ring detail, so the two are alternative mating cups rather than substitutes for each other.