ACME quarter inch 16TPI rod
Making ACME tap
Supposedly flutes
More file work
Tapping delrin rod
Finished Delrin lead nut
Filed down almost to the thread OD
Failed attempts at DIY shaft couplings
Eureka - nylon spacers ($10 per 100 pack)
Reasonably good DIY couplings
10-24 to qtr inch shaft coupling from nylon spacers
Delrin lead nut installed in the sliding element
ACME quarter inch rod in the contraption
Rod mount supports - 4 nuts (0.5 in)
Motor mounting - halved nylon spacers ~0.5 in
Looking down ACME screw
Motor end
Slot for set screw
ACME screw installed for testing
Axis end closeup