Automatic Reciprocating Tapping Machine

A tapping machine designed a long time ago (before I started 3D printing), the main board casing and 555 motor cover for it can be found on my homepage

Uses 10mm smooth rods 30CM*2, smooth rod flanges and limit clamps*2, spring diameter is up to you (thinner recommended)

The top part was modified based on previous CNC files, there might be slight issues, feedback is welcome

The heat set inserts are 4*5.5*6mm and 5*7*6mm, both are 6mm in height

The top and bottom plates are recommended to be CNC machined from aluminum alloy because 3D printing's tensile strength is still a bit weak, CNC files have been uploaded (not universal)

Currently, successfully tapped up to 6mm diameter, I haven't tried higher

For the workpiece cover, I currently use a perforated plastic sheet solution, similar to the bottom plate, the one in the files has not been tested at the time of publishing

Item list

555 motor with gearbox, reduction ratio is up to you, I used one with a final speed of 55

YEYY motor reciprocating main board

Limit switch, see Figure 3

10mm smooth rod 300mm*2

Smooth rod flanges*2

Smooth rod diamond clamps*2

Springs*2

B10 chuck + adapter rod, I forgot the length of the adapter rod, it is recommended to print it out first, then measure with the motor before buying

Bearing*1, buy the corresponding inner diameter size according to the adapter rod size, thickness is up to your choice

Foot pads*4

Several M4*16 cap head screws, 4 M5*25mm cap head screws, the base plate screws are M6 flat head