Screws are not included. Recommended screws listed on instruction sheet image.
The holes are sized for #4-40 threads the buyer will need to tap the holes as 3D printing threads at this scale would be unreliable.
Allows for easy gear mesh adjustment by loosening 2 screws and sliding the mount.
Optional but recommended set screw to "fix" the desired mount setting.
Shapeways has printing tolerances. To ensure the best possible fit all dimensions are designed to be a bit snug versus too loose. A little material removal/sanding may be necessary on the mounting posts as well as the bearing surface. Note: White plastic items in photographs have been revised for printability in aluminum.
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