Bartech Focus Ring 74.7mm

Bartech Focus Ring 74.7mm 3d printed Mechanical parts Maker/DIY
Solid focus ring for later model Bartech handunit, with diameter 74.7mm. Must produce with "White Strong Flexible Polished" for proper friction fit. 

Requires modification of handunit; need to install a 4-40 socket cap screw as indexing mark for rounded notch. 

This material is porous so you need to finish with a few coats of polyurethane to seal it, but will never be as fully impermeable to markers as rings machined from Delrin or other solid plastic.
cm: 8.04 w x 8.04 d x 1.6 h
in: 3.165 w x 3.165 d x 0.63 h

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