140 mm Six-Station Index Platter
The 140 mm × 4 mm work platter for the 'NEMA17 Geneva Indexing Turntable' kit. It bolts to the 608 spindle tube with 3x M3x6 bolts through counterbored 3.4 mm holes on a 38 mm PCD. The 24 mm centre hole clears the pointer collar's pad. Six stations sit at r = 50 mm, 60° apart, each with two M3 holes 20 mm apart and a 6 mm locating dimple for mounting fixtures. Six 3 × 3 mm radial ribs on the underside keep it flat. It prints top-face-down, so the work surface, dimples and 1 mm rim chamfer all come out off the bed.
mechanism kit geneva turntable