We have to cut color negative stock, which comes in a wide roll, down to about a four inch width after which the roll goes into a dark chamber to be cut into individual sheets. I had looked for a reasonably priced commercial slitter but all I could find were machines in the $10,000 and up range.
A trip to Home Depot yielded a little circular saw which was almost toylike. This was mounted on the South Bend Heavy 10 lathe we have in the lab (this is a special NASA owned lathe bought surplus from the Apollo Program). A mandrel made of a broomstick and a "pool noodle" was used to spin the roll while it cut.
|The impromptu "log slitter" on an old (but very fine) South Bend|
lathe. The log rotates a big roll of color film. The yellow part
is a "pool noodle" used in swimming pools.