Motor pulley for Rexon DP8 drill press

Original file:

• This is a replacement for the Rexon DP8 drill press's motor pulley
• The pulley should be printed with supports
• The finished print requires a M8 nut and a M8 set screw to lock the pulley onto the motor shaft
• Note: I inherited this drill press with the motor pulley already missing, I calculated the diemensions based on the dimensions of the spindle pulley, distance betweeen the motor and spindle shaft, and the belt length. It's working fine on my drill press, for now, but I give no guarantees.

Update file(2024/9/9):

• After some uses with the drill press, I discovered the pulley is not working optimally.
  1. The drill press uses a K-26 belt, and the pulley is just too large for it, which made the belt too tight.
  2. The K-26 belt is 26 inches (660 mm) in length, but I discovered through trial and error, the belt should be treated as a 610 mm long belt in order to have adequate slack.
  3. The smallest pulley is just too small with the wall being ~1mm at the thinnest area. It just broke off after a while.
  4. I later found the original injection molded pulley, and it also broke at the same place, suggesting it's not designed well to begin with.
• Changes for the updated version:
  1. Pulley sizes have been recalculated to have a bit of slack, not to loose not to tight. The slack can be taken up by the belt tensioner.
  2. I omitted the smallest pulley, and allotted the space for the locking nut and screw.
  3. The new design can be printed without support.
  4. The updated version is still considered as experimental, I give no guarantees!