Darkness: The darkness of the welding lens is defined by a shade number. 0: This is clear glass. 2 to 4: Even when off, most LCD lenses are not clear. They usually have a resting shade of between 2 and 4. 4 to 5: These shades are for grinding. On many helmets, going from welding to grinding mode is via a single button.

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Make life easy with state-of-the-art motion control components and positioning systems. And never sacrifice quality by using the PRO Series or eSX 5-Axis CNC lens grinding platform that's right for you. Spheres, aspheres, cylinders, prisms, and freeforms. Glass, ceramics, and hardened steels. Lens sizes from 5-500 mm.

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