Description
Restore smooth kingpin rotation and eliminate front-axle steering play on your commercial fleet with the genuine FAG Commercial Vehicle Steering Knuckle Needle Bearing & Roller Cage. Engineered specifically for heavy-duty commercial trucks, multi-axle freight haulers, and passenger transport coaches, this OE-grade needle roller bearing supports extreme radial impacts exerted on the steering knuckle during heavy cornering and uneven road transport. Corroded roller cage pockets, spalled needle rollers, or inadequate lubrication cause stiff steering effort, front wheel shimmy, premature kingpin wear, and uneven tire shoulder degradation. This original FAG bearing solves those mechanical steering failures directly. It features high-precision fatigue-resistant needle rollers, a hardened steel cage guide, and an optimized crown profile to deliver uniform stress distribution, ultra-low friction torque, and uncompromised steering safety in demanding transport operations.
Technical Parameters
| Category | Specifications & Technical Details |
| High-Density Needle Roller Arrangement | We use high-precision deep-hardened 100Cr6 bearing steel needles that deliver very high load capacity per unit contact area. As a result, they easily handle extreme radial impact loads of tens of tons on heavy truck front axles. |
| Optimized Crown Profile Needle Rollers | We precision-grind the needle ends with a crowning profile. This effectively eliminates edge stress caused by slight kingpin bending under heavy load. Consequently, it greatly extends service life. |
| High-Strength Steel & Synthetic Roller Cage | We offer stamped steel or high-wear-resistant engineering plastic cages. They precisely guide the needles in parallel rotation. Therefore, they prevent needle skewing or seizure during heavy-load steering, which significantly reduces friction torque. |
| Special Surface Anti-Wear Coating | We apply high-grade quenching and phosphating anti-wear treatment to the cage and needle surfaces. This delivers strong anti-seizure capability and false Brinell resistance. |
| OEM-Grade ISO Precision Tolerance Standard | We manufacture strictly to ISO / DIN international standards. Radial clearance and mounting dimension tolerances stay extremely tight. As a result, it achieves micron-level close fit with the kingpin and bushing. |
Applicable Car Brands & Models
Common warning symptoms include:
Stiff or Heavy Steering Effort: The steering wheel feels binding, stiff, or requires excessive physical force when turning at slow speeds.
Front Wheel Shimmy or Steering Play: Excessive looseness or clunking noise felt in the steering column when driving over rough road surfaces.
Uneven Front Tire Wear: Rapid feathering or cupping wear on the inside edge of the front steer tires due to kingpin alignment offset.
Grease Leakage or Rust Seepage: Discolored rust water or dry metal dust bleeding out from the steering knuckle seals during chassis grease lubrication.
Premature failure is typically caused by insufficient grease maintenance, moisture intrusion through damaged dust seals, or overloading. Lack of fresh lubricant causes metal-to-metal contact, leading to spalling on the needle rollers and indentation (brinelling) on the kingpin surface.
Yes. Fleet mechanics strongly recommend installing a complete kingpin kit containing new FAG needle bearings, seals, thrust washers, and kingpins simultaneously. Installing new bearings on a worn or grooved kingpin causes rapid stress concentration and early bearing failure.
Our 1-year warranty covers all material spalling, structural cage breakage, manufacturing dimensional flaws, and non-artificial mechanical failures under normal operating and lubrication conditions. If a bearing fails within 12 months, we provide prompt replacement or warranty processing upon inspection.
