2" (50mm) Edge Center Finder w/ Replaceable Insert

Make your own unique inserts for markers or any marking tool by creating a 22mm diameter by 7mm high center insert (608 bearing dimensions).  The included insert works great for mechanical pencils.

Print at < 0.2mm in order for threads to be fully formed.

Uses common 608 bearings for smooth sliding.  

Uses common M3 x 6, 7, or 8mm screws to hold covers.  In order for bearings to move freely, do not fully tighten covers against them.

No supports needed.