A4059 - A4138-B

A TSF bearing is a single row tapered roller bearing with an outer-ring flange​, enabling precise axial positioning in through-bored housings without additional shoulders.

They accommodate combined radial and unidirectional axial loads. The larger the contact angle, typically 10–30°, the greater the axial capacity.

The flange: 1. Accurately locates the bearing axially in through-hole housings. 2. Helps maintain precise alignment without machined shoulders 3.Reduces manufacturing complexity and tooling costs.

Yes, the cone (inner ring, rollers, cage) separates from the flanged cup, allowing easier installation, maintenance, and inspection.

1. Usually made from chrome steel, with stainless variants (440C) for corrosion resistance. 2. Available in ABEC 1–5 accuracy, offering low noise and tight runout for precision uses.

They come in: 1. Open design (most common) 2. Sealed (rubber lips) 3. Shielded (metal shields)—customizable depending on environmental demands.

Since they're unidirectional in axial support, TSF bearings are often paired in back-to-back or face-to-face orientations with a companion bearing to adjust preload and achieve rigidity.

1. Simplified housing: flange replaces machined shoulders 2.Accurate axial location and alignment 3. High stiffness due to tapered geometry 4. Service-friendly—easy to mount/dismount and maintain.

1. Gearboxes, machine tool spindles, and transaxles 2.Automotive/wheel-axle setups, railway bogies 3.Industrial equipment like conveyors, crushers, agricultural, and mining machinery.