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AISI 440C Stainless Steel Ultra-Slim Thin Section Bearings: The "invisible Armor" of Robot Joints.
Views: 11 Author: Site Editor Publish Time: 2026-08-17 Origin: Site
The flexible end effector of collaborative robots and the precise, controllable scalpel tip of surgical robots rely on a seemingly thin yet powerful core component—an AISI 440C stainless steel Ultra-Slim thin section bearings. With its ultra-high hardness of HRC60+, micron-level machining precision, and unique equal cross-section structure, it continuously breaks through the performance limits of robot joints in terms of load-bearing capacity and operational precision.
440C is a high-carbon, high-chromium martensitic stainless steel. In the stainless steel alloy system, it has excellent strength, hardness and wear resistance, and is known as the "king of hardness among stainless steels".
【Material Parameters】
● Material type: High-carbon, high-chromium martensitic stainless steel
● Carbon content: 0.95%~1.20% (high carbon content, ensuring the hardness of the bearing core)
● Chromium content: 16%~18% (gives the material good corrosion resistance)
● Other elements: trace elements such as manganese, silicon, phosphorus, and sulfur
● UNS Number: UNS44004
● National Standard Grade: 9Cr18Mo
● American Standard Code: AISI 440C
【Application Scenarios】
With its core advantages of high precision, lightweight design, and compact structure, the Ultra-Slim thin section bearings is suitable for high-end equipment applications in multiple fields.
● Industrial robots: precision components such as joints, robotic arms, and rotary tables enable high-rigidity operation of equipment
● Humanoid robots: Meeting the requirements for impact resistance of joints and foot mechanisms, and installation and use in small spaces
● Aerospace: Equipment with stringent requirements for weight and precision, such as satellites and drones
● Precision medicine: medical equipment, surgical instruments, optical instruments
● Precision instruments: Ensure the equipment operates with high precision and high stability continuously
【440C material + uniform cross-section structure: a powerful combination to achieve performance breakthrough】
Liaocheng Zhuoyi Bearing Co., Ltd. has launched the AISI 440C stainless steel Ultra-Slim thin section bearings, which combines the high hardness and corrosion resistance of 440C stainless steel with a compact space design of equal cross-section, and can reach the P4/P2 ultra-precision level, providing customized bearing solutions for various special and complex working conditions.
