Bell & Howell Replacement Worm

[Maurice Leakey]

When I first saw a picture of a replacement Bell & Howell worm gear on Ebay I assumed it was either plastic or some kind of nylon because of its colour, but it said it is made of solid aluminium.
Has any member installed one of these and can confirm that perhaps it has been coloured in some way from the basic silvery look of aluminium?
Bell & Howell worm gear-16mm projector 500 to 2500 mod. | eBay

[Derek Southard]

Mine arrived today and is aluminium painted black. It comes with the two different felt pieces shown in the video and instructions for retiming the projector during reassembly.

[Richard C. Patchett]

Greetings Maurice
I have installed almost 30 of theses. Of the new black worms non still
with No problems It seems they are aluminum