Automotive Bearings

• Origin & Manufacturing: Premier European Manufacture (Global OEM Assembly Line Standard)
• Raw Material: High-Carbon Chromium Alloy Steel (100Cr6 / SAE 52100)
• Surface Hardness Rating: High Wear Resistance Rated Above 60 HRC (Rockwell C)
• Internal Clearance Tolerance: High-Precision Tolerance Maintained Under 20 Microns (μm)
• Sealing & Cage Spec: Sealed 2RS Rubber Contact Seals with High-Speed Fiber Cages
• Load Capabilities: Optimized for Combined Heavy Radial Loads and Axial Thrust Forces
• Quality Certifications: Fully Compliant with ISO 9001 and ISO/TS 16949 Drivetrain Standards
• Testing Compliance: Tested under TS3574 (ISO15), TS5753 (ISO5753), TS966 (ISO1-1132), TS5825 (ISO492), TS6269 (DIN1-623/625), TS7103 (ISO1-3290), TS582 (ISO582)
• Certifications & License: Manufactured under License and Supervision of DAkkS GERMANY

Engineered to strict OEM quality standards and utilized on global automaker assembly lines, KIEK automotive bearings provide high operational reliability, reduced friction, and superior load distribution. Crafted from high-purity 100Cr6 alloy steel and hardened to over 60 HRC (Rockwell C), these European-manufactured bearings deliver extreme resistance to surface fatigue, spalling, and heavy radial and axial shock loads.

Designed with precision internal clearance tolerances below 20 microns, these bearings eliminate operational vibration and humming noise, ensuring smooth power transfer. Featuring high-speed fiber cages and premium double-lip contact seals (2RS), they lock in lifetime lubrication while sealing out dirt, road grime, and water. Fully certified under ISO 9001 and ISO/TS 16949 standards and compliant with rigorous European test norms (ISO/DIN), every bearing is supplied under the technical supervision and quality license of DAkkS GERMANY.

Main Functions of Automotive Bearings:

• Frictional Resistance Reduction: Converts sliding friction into low-resistance rolling friction, allowing shafts and hubs to rotate freely with minimal parasitic energy loss.
• Radial & Axial Load Capacity: Supports the vehicle's dead weight while withstanding dynamic cornering, braking, and acceleration forces.
• Rotational Alignment Maintenance: Keeps transmission shafts, wheel hubs, and rear suspension arms precisely aligned within tight mechanical tolerances.
• Component Wear Mitigation: Prevents direct metal-to-metal contact between rotating shafts and stationary housings, extending the lifespan of connected drivetrain parts.

Supplementary Documentation: Guide & Maintenance

1. Installation Guidelines:

• Use Hydraulic Press Equipment: Always install wheel and transmission bearings using a hydraulic press and proper drift adapters. Never strike the bearing rings or cage with a hammer, as shock impact causes brinelling (denting) of races and rapid premature failure.
• Correct Press Force Application: Apply pressing force strictly to the ring experiencing the press fit (the outer ring when fitting into a housing; the inner ring when fitting onto a shaft).
• Housing Inspection: Clean housing bores and shaft journals thoroughly. Remove rust, metal burrs, or scoring before installation to ensure a concentric fit.
• Directional Orientation: For ABS-integrated wheel bearings, verify encoder magnetic ring orientation before pressing into the steering knuckle.
• Do Not Repack Sealed Bearings: Bearings designated with 2RS seals come pre-greased with factory-calibrated lifetime synthetic lubricant. Do not wash or add grease to pre-sealed units.

2. Failure Symptoms & Replacement Schedule:

• Symptoms of Worn Bearings: Continuous roaring, humming, or grinding noise that increases with vehicle speed or changes tone when cornering; steering wheel vibration; loose wheel play; ABS fault warning lights; or excessive hub heating.
• Replacement Schedule: Bearings are non-repairable safety components. Replace immediately upon the first onset of noise or mechanical play. Clutch bearings should be replaced preemptively during every clutch kit overhaul.

3. Non-Repairability:

Automotive bearings are precision-sealed, non-serviceable units. Damaged raceways, spalled steel balls, or degraded cages cannot be repaired or reconditioned and require complete assembly replacement.