import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,-42))
r=w0.sketch().arc((-37,-38),(46,1),(-37,38)).close().assemble().finalize().extrude(39).union(w0.sketch().push([(-5,1)]).circle(41).circle(2,mode='s').finalize().extrude(85))