Toroidal roller bearing TORB

radialstainless steelfor paper machines

Overview
TORB toroidal roller bearings from FAG combine the properties of spherical and cylindrical roller bearings in a single component, designed for demanding paper industry applications such as drying and yankee cylinders, press rolls and thermo rolls. Used as a non-locating bearing together with a spherical roller bearing as locating bearing, TORB improves system life, reduces total cost of ownership and ensures accurate bearing guidance at high production speeds.

Benefits

• Extended service life: up to twice the rating life in locating/non-locating arrangements.
• High reliability and cost-efficiency: X-life quality lowers maintenance and downtime.
• High radial load capacity thanks to a special internal geometry.
• Interchangeability: produced in standard ISO dimension series and sizes for compatibility with market products.
• Compact non-locating design for efficient use of installation space and high power density.

Product portfolio

• Range: eight series covering shaft diameters from 25 to 1200 mm; matching sizes available with spherical roller bearings.
• Versions: tapered or cylindrical bore; case-hardened inner ring option.
• Internal clearance classes: CN, C3 and C4.
• Temperature resistance: suitable for operating temperatures up to +200 °C.

Bearing concept & key features

• Combines angular adjustability and axial displacement capability in one bearing.
• Special TORB raceway profile for optimal stress distribution and low friction.
• Roller positioning distributes load evenly along the roller length for reliable performance.
• Compensates axial length displacement up to ±10% of bearing width.
• Tilting compensation up to 0.5° without reducing basic load rating or rating life.
• Effective damping of axial vibrations, reducing system vibration and noise.
• Main dimensions correspond to DIN 616:2000 and ISO 15:2017.

Schaeffler X-life Premium Quality

• X-life designs provide higher basic dynamic load ratings than standard bearings, extending rating and operating life.
• Benefits include increased wear resistance, reduced friction and lower operating temperatures, higher running accuracy and greater basic load ratings versus standard market products.

Applications

• Primarily designed for the paper industry: drying cylinders, yankee cylinders, press rolls and thermo rolls.
• Optimized as a non-locating bearing for locating/non-locating arrangements (typically combined with spherical roller bearings as locating bearings) to manage thermal expansion and misalignment.

Technical specifications

• Series: TORB.
• Shaft diameters: 25 to 1200 mm (eight series).
• Bore types: tapered or cylindrical; case-hardened inner ring optional.
• Internal clearance classes: CN, C3, C4.
• Maximum operating temperature: up to +200 °C.
• Axial length displacement compensation: up to ±10% of bearing width.
• Tilting compensation: up to 0.5°.
• Standards: main dimensions per DIN 616:2000 and ISO 15:2017.
• Typical role: non-locating bearing paired with spherical roller bearing as locating bearing.