Compass 7-80 cm.

thingiverse

Another compass, this reaches up to 80 Cm. Being divided into two pieces, it can be printed with normal 220x220 bed printers. Here, you'll need a 40 mm M4 screw, a piece of 50/55 mm threaded bar, some nuts and washers M4. Sharpen the threaded bar. Assembly is intuitive and simple: insert the nuts in their seats, let the sliding block protrude about 15 mm from the pointed threaded bar, then lock it with a nut. To join the two pieces, you'll need two 16 mm M4 Allen screws with nuts and washers. Use them along with glue to secure everything in place.