Reflector Collimation Knobs
thingiverse
Poor Man's Bob Knobs. Makes tool-less collimation of Reflector Telescopes easy. These knobs are a tight friction fit to 4mm bolts. You will need 3 bolts to replace the grub screws that came with your telescope. Simply take one to the hardware store to find it's size. Allow for extra length as the grub screws are recessed in the secondary holder. My 12" Skywatcher dob required 4 x 35 mm bolts Replace one at a time to keep rough collimation.
Download Model from thingiverse
With this file you will be able to print Reflector Collimation Knobs with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Reflector Collimation Knobs.