Replacement lens works great. Point of caution. The lens will crack if you are over ambitions tightening it. A simple screwdriver in the pin hole works but requires lots of force. I 3d printed a tool with two finishing nails as the pins. The holes are not aligned on the center of the nut so 3d printing allowed a custom fit. New lens went in perfectly after that and it is performing well.
My laser 40K laser is much better with this.
This lens top shelf.It's CONVEX. Really improves,Your machine,
Works Great!
Excellent upgrade from the stock lens in a K40. My laser cuts better than new.
Feature Product
- High Quality ZnSe Material. Excellent Optical Properties. Plano convex shape (Convex-concave) lens for better quality when engraving.
- Superb Coating Process: Double-sided Solid Coating. Wiping Resistance. Long Working Life.
- High Precision Process: Excellent Substrate. Precision Slicing, Polishing, Grinding Processes. High Temperature, Laser Resistance.
- High Transmittance: High Quality Material and Exquisite Coating. Reduce the Loss of Laser. Higher Work Efficiency.
- Diameter: 18mm(0.71 inch), Focal length: 38.1mm(1.5 inches), Thickness: approximate 2.2mm (0.09 inch)
Description
How to Determine Focal Length?
The Focal Length is the Distance Between the Focal Lens and the Cutting/Engrave Material.
When install the Lens, Make Sure the Focusing Lens: Convex Face to Laser, Concave Face to Material.
How to Clean Laser Lens and Mirrors?
Step 1 Cleaning for Light Contamination (dust, lint particles)
Use an air bulb to blow off any loose contaminants from the optic surface before proceeding to the cleaning steps.
Step 2 Cleaning for Light Contamination (smudges, fingerprints)
Lay the lens tissue on the optic's surface. Using an eyedropper, squeeze a few drops of acetone onto the lens tissue, wetting the complete optic's diameter. Without lifting the lens tissue, drag the lens tissue across the optic just fast enough so that the liquid evaporates behind the tissue. This should leave no streaks.
Step 3 Cleaning for Moderate Contamination (spittle, oils)
Dampen an unused cotton swab or cotton ball with white distilled vinegar. Using light pressure, wipe the optic's surface with the damp cotton. Wipe excess distilled vinegar with a clean dry cotton swab. Immediately dampen a cotton swab or cotton ball with acetone. Gengly wipe the optic's surface to remove any acetic acid.
Thicker than the original. More pronounced curvature. Focal length seems to be spot on.
It seems to perform well.
Good
Exactly what I needed and got it in time.
Lens worked as described.
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