Flanged Steel Sleeve 20*26.5*14

Realize precise positioning, support, and guidance
The inner hole of the flange steel sleeve is precision ground to provide very high-precision dimensional tolerances, roundness, and surface smoothness, providing a stable and geometrically accurate running track for components such as shafts or piston rods. This ensures the coaxiality of rotation and the neutrality of linear motion, thereby ensuring the operational accuracy of the entire transmission or execution component. For example, in hydraulic cylinders, the flange steel sleeve (often referred to as the "guide sleeve") provides precise linear guidance for the piston rod, preventing it from eccentric wear and jamming.
Axial positioning and sealing/dust-proof function brought by flange structure
The "flange" is the key difference between it and a regular straight sleeve. The flange part plays an important role:
Axial positioning: The flange is tightly attached to the end face of the machine body, which can accurately define the axial position of the steel sleeve in the hole, prevent it from shifting due to force during operation, and make installation easier and more reliable.
Sealing and dustproof: The flange end face can be designed with grooves for installing O-rings, dustproof rings, or sealing rings, effectively isolating external dust and impurities from entering, preventing internal lubricant leakage, and protecting the clean and lubricating environment inside the shaft and sleeve. This is the key to achieving "low-noise" and "long-life" operation.

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