Install or Replace a Filter

The tab mounting filter wheels allow easier insertion of filters. The black delrin tabs and spacers will hold filters from 1 to 5 mm in thickness.

Spacer rings with thickness of 0.75 and 1.50 mm are stacked first in the filter wheel so that the filter’s top surface is just above the level of the tab. The tab is then inserted and held in place with the supplied Phillips pan head screws (4-40 x 3/16 long) so that there is a small amount of pressure on the filter and the delrin tab is slightly bent. Delrin is very resilient and it will not be deformed easily even if the bend is steep. Don’t tighten the three pan head screws until all the tabs are mounted and in contact with the filter. Then tighten each one slightly until the pan head screw is fully seated and the head is not above the surface of the filter wheel.