SDA 100X30 CYLINDER

About SDA 100X30 CYLINDER

1. SDA in Eye Care (Optometry)If youre referring to SDA cylinder in the context of vision or eyeglass prescriptions, it may relate to: SDA: An abbreviation for Spherical Diopter Axis (though not a common term; perhaps a misused one). Cylinder: Refers to astigmatism correction in eyeglass prescriptions. It indicates the power needed to correct astigmatism. 2. SDA in Mechanical or Engineering Contexts In engineering, SDA might refer to a specific standard or part type. Combined with cylinder, it could mean: SDA pneumatic cylinder: A type of compact air cylinder, often found in automation systems. Example: SDA Series Pneumatic Cylinders by brands like SMC, Airtac, etc. Commonly used for short-stroke, double-acting pneumatic motion in industrial applications. These typically feature: Compact design Aluminum body Double acting mechanism Magnetic piston for sensor detection (optional) 3. SDA: Storage Devices (unlikely) If youre thinking of /dev/sda (common in Linux systems), then "cylinder" could refer to an old way of partitioning disks but this is outdated due to modern LBA (Logical Block Addressing). TL;DR: Could you clarify what context youre asking about? Vision (optometry)? Mechanical/pneumatic systems? Data storage (hard drives)? Something else? Let me know and I can give you a more accurate answer.