Camera shutter

Materials:
Oak dowel rod 8mm, 300mm lengths purchased.
Skateboard bearings 608ZZ/2RS ABEC5 hybrid ceramic. Size 8x22x7. (5 are required)
Springs 12mm OD, 0.8mm Stainless steel, R0.31N/mm/cm. usable length 115mm
Solvent waste pipe 25mm OD, thickness 2.2mm, cut to 154mm lengths
3mm dowel pins, varied sizes
Bearings F623ZZ mini flanged bearings

Also requires a jewellry drill and a pipe cutter.

Shutter cloth is made from ripstop fabric painted with several thin layers of blackboard paint and cut to shape using a paper guillotine. Metal stiffeners are required to help the aperture keep its shape.