1.Core Structural Design
Double-row Layout and Contact Angle:
Utilizing a double-row ball O-shaped arrangement with a fixed contact angle of 60°, it offers both axial and radial load capacity, making it particularly suitable for screw drives with predominantly axial loads. Combined with an optimized raceway profile, it offers outstanding anti-overturning performance (with a tilting stiffness of 750 Nm/mrad).
Mounting: A hallmark of the ZKLF series, this model features 12 M8 fixing holes in the outer ring, allowing direct screw mounting to adjacent structural components. This eliminates the need for additional locating holes or bearing end caps, significantly simplifying assembly and reducing structural processing costs. The inner ring is clamped using INA-recommended ZMA40/62 or AM40 precision locknuts, accurately applying an axial preload of 25,185 N to eliminate play.
Sealing and Lubrication System: The common suffix "2Z" designates a double-face gap seal, suitable for high-speed operation. With grease lubrication, the maximum speed reaches 3,100 r/min. A "2RS" lip-type contact seal is also available for enhanced dust and water resistance. The bearings are pre-loaded with GA28 standard lithium soap grease, and a lubrication port is provided on the outer ring for relubrication according to operating conditions.
2. Performance Advantages
High Precision and High Rigidity: Geometric tolerances are controlled through precision grinding, resulting in an axial runout of only 2.5μm and an axial stiffness of 1200 N/μm. This effectively suppresses vibration and deformation in the screw drive, ensuring equipment processing accuracy.
Load-Carrying and Life Performance: The rings utilize a special heat treatment process to significantly enhance wear resistance. The basic rated axial dynamic load reaches 72,000 N and the static load reaches 149,000 N, meeting the requirements of long-term stable operation under medium-to-high load conditions.
Low Friction: The optimized cage structure and ball guidance method reduce friction loss, resulting in a friction torque of only 0.65 Nm, minimizing operating temperature rise and ensuring stability under high-speed conditions.
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