Timken42346Tapered Roller Bearing Single Cone — 3.4630 in Bore, 1.1406 in Inner Ring Width, 43,400 lbf Dynamic, Mates With 42584 Cup

Product Description

What this part is

A Timken 42346 tapered roller bearing single cone — the inner ring together with its tapered rollers and stamped steel cage. This is the inner half of a TS single-row tapered roller bearing. The cup (outer race) is a separate part number and is not supplied here.

Decoding the designation

42346 is a cone number in Timken’s imperial 42000 series. In Timken imperial practice the cone and cup carry separate numbers and are quoted as a pair, so a 42346 is normally called out with its cup — the 42584 is the catalogue mate. Suffixed forms such as 42346-2 and 42346-30000 are packaging and precision-programme variants of the same cone.

Published ratings and mounting data

Bore (d): 3.4630 in / 87.96 mm, straight bore
Inner ring width (B): 1.1406 in / 28.97 mm
Dynamic load rating: 43,400 lbf / 193 kN
Static load rating: 54,300 lbf / 241 kN
Limiting speed: 3,200 rpm
Maximum shaft fillet radius: 0.12 in
Operating temperature range: −54 °C to 120 °C
Material: case-carburised bearing steel, stamped steel cage, open, no seal, no snap ring

What these specs mean in practice

The static rating sitting well above the dynamic rating is normal for a tapered roller bearing: static capacity is a permanent-deformation limit on a stationary ring, while dynamic capacity is a fatigue-life figure. For a shock-loaded shaft that spends time parked under load — a press, a slew drive, a mill pinion — the static number is often the one that governs. The 3,200 rpm limit is a grease-lubricated figure and can be raised with circulating oil and correct setting.

Quantity and configuration

One cone assembly ships. No cup, no spacer, no seal. It is not a matched pair.

Fitting notes

Fit the cone to the shaft with an interference fit, driving only on the backface, and observe the 0.12 in maximum shaft fillet radius so the cone seats fully. Tapered roller bearings are set, not simply bolted up: establish the intended endplay or preload after the cup is pressed into its housing. Never pair a used cup with a new cone.

Interchange guidance

42346 is an industry base number, so 42346 cones from SKF, NTN, Koyo, FAG and Bower share bore, taper and width. Matching cup: 42584. Neighbouring cones in the series such as 42362 differ in bore and are not substitutes despite sharing the 42584 cup.