INA Rod Ends (spherical plain bearings with integral rod attachments) represent Schaeffler Group’s engineered solution for transferring forces and motions through articulated linkages across industries where misalignment, high loads, and harsh environments challenge conventional joints. Combining a spherical plain bearing core with threaded shanks or forged eyes, these components enable ±2°–25° angular misalignment while transmitting axial, radial, and moment loads with unmatched durability and maintenance-free operation.
Key Performance Benefits:
Misalignment Compensation: ±4°–15° static angle; ±2°–25° dynamic oscillation (prevents binding in linkages)
High Load Density: Radial static loads to 500 kN, axial loads to 250 kN (e.g., DRD series)
Zero Maintenance: IGLIDE® polymer liners operate dry; lubricated versions offer 10,000+ hour service life
Corrosion Resistance: Stainless steel (AISI 316), zinc-nickel plating, or ESKATEC® coatings for salt/fuel exposure
Weight Optimization: Hollow shanks and aluminum housings reduce mass by 40% vs. industrial competitors
Critical Industry Applications
- Automotive & Racing
Steering Tie Rods: KEM series with 200 kN radial fatigue strength (F1 suspension loads)
Clutch Linkages: Self-aligning GRA-E rods compensating for engine movement
- Aerospace & Defense
Flight Control Surfaces: DRD-AL aluminum rods (-60% weight) with FAA EASA approvals
Landing Gear: Corrosion-resistant SIK..ES rods with MIL-STD-810 shock testing
- Industrial Machinery
Hydraulic Cylinder Mounts: KIRB series with 250 kN static load for metal presses
Robotic Arms: Fiber-composite lined rods for vacuum/cleanroom environments
- Agriculture & Construction
Excavator Bucket Linkages: Sealed GRA..E rods with 10,000-hour grit immunity
Harvester Adjusters: ESKATEC-coated rods resisting fertilizer corrosion
Why INA Rod Ends Dominate Precision Linkages
Digital Twin Verification: Schaeffler’s Bearinx® software simulates load distribution under misalignment
Global Certifications: ISO 9001, AS9100, IATF 16949 automotive
Life Testing: 5 million oscillation cycles @ 50 kN radial load (DIN ISO 14272)
Customization: Laser-etched part numbers, special coatings, non-magnetic variants
Innovation Spotlight:
Smart Rod Ends: Strain gauges + RFID chips for real-time load monitoring
Hybrid Composites: Carbon fiber-reinforced PEEK liners for 320°C turbine linkages
The Articulation Authority
INA Rod Ends transform complex mechanical linkages into reliable, maintenance-free motion systems. By integrating hardened spherical bearings with precision-machined rods and advanced tribological surfaces, they outperform traditional ball joints in load capacity, misalignment tolerance, and service life—whether enduring 10g impacts in rally cars or subsea pressures in ROVs.
