mechanical or taiji mechanism designed for laser cutting. There are 2 leaves. When you rotate the Drive Partor the middle plate, the center hole can open or close gradually. The center hole is diameter 80mm, the outer size is diameter 185mm and thickness is 12 mm. The parts' thickness is 3 mm. Because your material's thickness may be thinner or thicker than 3mm, perhaps you need to make some change accordingly when assemblying.To assemble the parts togther,some metal parts and glue are needed: 1. Diameter 2mm length 5mm-pin; Diameter 2mm,length 12 mm pin; M2X12 screw; M2 hexagon nut.

STEP and DXF format files are included. The FBX ,STL and OBJ format files can be deleted,they are only for cgtrader's requirement.