GT2 Belt Tensioner Cartridge
A print-in-place GT2 belt tensioner that bolts to any frame face with two M5 screws and T-nuts (holes 64 mm apart, on the 2020 slot centreline) and gives 16 mm of idler travel from a single M3 x 20 screw that self-taps into the 7 mm end wall. The flanged 16 mm idler pulley (7 mm belt channel for 6 mm GT2) prints already captured on its own post, so there is no bearing, shoulder bolt or spring to source; overall 76 x 32 x 33.5 mm, three pieces, one print.
mechanism gt2 2020-extrusion idler