Telescopic crowns

Metal-milling of the primary telescopes

The ideal number of revolutions depends on the type of milling tool and milling machine. In contrary to the usual opinion you can work often with very high speed. It is recommended to use cross-cutters for rough milling. After fine milling, the surface can be smoothed using abrasive paper with corn size 600 – 1000. Finally the primary crowns are polished with Tiger brillant polishing paste.

Rough milling.

 Fine milling.

Smoothing with fine abrasive paper.

 High-gloss polish.