KT Series Thin Section Tapered Roller Bearings

Design and Performance of KT Series Thin Section Tapered Roller Bearings

KT Series Thin Section Tapered Roller Bearings consist of a tapered inner ring assembly and a corresponding outer ring. The intersection of the raceway extensions at a common point on the bearing axis enables true rolling motion, minimizing friction. These single-row radial bearings are engineered to carry both radial and axial loads, with axial capacity increasing as the contact angle (typically 10°–30°) increases. A contact angle around 12° allows them to sustain moderate thrust loads efficiently.

Structural Characteristics

• Thin-walled design with large bore diameters reduces weight and saves space.
• Precision cages ensure accurate roller positioning and consistent performance.
• Bearings are typically mounted in pairs to manage axial loads effectively, either back-to-back (DB) or face-to-face (DF).

Materials

Standard bearings are made from chrome steel for high load capacity and durability. For corrosion resistance or harsh environments, 440C stainless steel is available, offering excellent load support and rust prevention.

Precision Grades

Available in ABEC-1 through ABEC-5 grades, with ABEC-3 suitable for most applications and ABEC-5 recommended for high-precision environments requiring low noise and minimal runout.

Dimensions

Bore sizes range from 177.80 mm to 508.00 mm (7 inches to 20 inches), supporting a broad spectrum of industrial needs.

Sealing Options

• Open type: Standard, most commonly used.
• Sealed type: Equipped with rubber seals for contamination protection.
• Shielded type: Fitted with metal shields; available upon request.

Key Features and Benefits

1. Low Friction

Optimized roller and flange design encourages stable lubrication film formation, reducing heat and wear, while maintaining preload and lowering operational noise.

2. Long Service Life

Logarithmic raceway profiles distribute loads evenly, minimizing stress concentrations and improving tolerance to misalignment and shaft deflection.

3. Enhanced Operational Reliability

High-quality surface finishes support hydrodynamic lubrication, ensuring consistent operation even under varying conditions.

4. Superior Manufacturing Precision

Rollers are produced with ultra-tight tolerances, ensuring load uniformity, reduced noise and vibration, and improved preload control.

5. Flexibility and Modularity

• Bearings are separable; inner and outer rings can be mounted independently.
• Same-size components are fully interchangeable for ease of assembly and maintenance.

Operational Conditions

Lubrication

Bearings come factory-lubricated using premium grease. Custom lubrication options are available upon request, including client-specified oils and greases.

Temperature Tolerance

Standard chrome steel models operate continuously up to 120°C and intermittently up to 150°C. For higher temperatures, specialized heat treatment and high-temperature greases are available.

Typical Applications

• Machine tool spindles
• Gearing systems and gear reducers
• Automotive drive axles
• Aircraft wheels
• Thermal power conveyors
• Construction and mining machinery
• Agricultural equipment (e.g., rakes, tensioning rollers)
• Port handling systems
• Railway axle boxes

Why Choose Us

With many years of industry expertise, we specialize in providing high-performance KT Series Thin Section Tapered Roller Bearings for critical applications. Our extensive inventory includes hard-to-find models, with many ready for same-day global shipment. We proudly serve over 60% of our clientele in North America. Our bearings have even been integrated into premium products like the Mercedes-Benz S-Class center console.

More than just a supplier, we are your bearing solutions partner. Our engineering team delivers tailored solutions based on your actual operating conditions, ensuring optimal performance and extended bearing life. Whether you’re sourcing for OEM, repair, or special applications, our team is ready to help you succeed.