STO6-TV bearing: complete specifications & equivalents

Specification table

Source: catalog reference (HR1 2026-09-25) · extracted 2026-09-30

Parameters extracted from the official FAG Rolling Bearings catalogue (HR1 2026-09-25); FAG® is a trademark of Schaeffler Technologies AG & Co. KG, used here for identification only — mpnbase is not an authorized FAG/Schaeffler distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at schaeffler.com.

Cross references & equivalents

Interchange levels: full standard interchange · partial verify parameters · verify manual confirmation required. Links resolve to the equivalent model's specification page where available.

How the STO6-TV model number is decoded

envelope 6×19×9.8 mm: the 19 mm outside diameter is the track-running surface — a thick-walled outer ring over a 6 mm bore — and the 9.8 mm width sets the contact width on the mating track the catalogue lists C 3.75 kN and C0 4.6 kN for the STO yoke-type track roller with inner ring, without axial guidance; the C/C0 ratio of 0.82 reflects a rolling-element pack sized for heavy static track loading, and the 6.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 0.66 kN at 6 mm bore, equivalent to 0.63 kN of dynamic rating per millimetre — the limiting speed is 10,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 6 mm bore takes the mounting pin or shaft; across the 9.8 mm contact width the dynamic rating works out to 0.38 kN per millimetre of rolling-element complement mass is 17 g, or 0.09 g per mm² of the 19×9.8 mm track envelope — inertia that the drive must accelerate on every index of the cam the 6 mm pin bore sits in the miniature band; at 9.8 mm wide the STO6-TV is built into compact cam drives, indexing pawls and light linkages The thick-walled 19 mm outer ring rolls directly on a flat track while the inner ring protects an ordinary machined pin from the needle-roller contact Because the inner ring is supplied, the mounting pin only needs standard bearing-seat tolerance and surface — hardening to raceway quality is unnecessary The -TV cage is part of the speed story here: cage-guided kinematics permit the published 10,000 r/min limiting speed without roller-to-roller sliding. Typical applications include robotic arm linear axes, agricultural and textile cam followers and conveyor transfer and diverting stations, where the 19 mm track diameter and 3.75 kN dynamic rating match the duty. In robotic arm linear axes the unit fits a compact 6 mm seat, and in agricultural and textile cam followers the 17 g mass keeps follower kinetics light. Designers also specify it for conveyor transfer and diverting stations, relying on the 9.8 mm width and the published 4.6 kN static rating. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin. Check the mating track hardness and flatness — a soft or scalloped rail fails before the 19 mm outer ring does.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.
• Check the mating track hardness and flatness — a soft or scalloped rail fails before the 19 mm outer ring does.
• Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.