This is a 248 mm slew bearing. I have provided the Fusion 360 file, as well as the STLs for all the individual components. The inner diameter is 140 mm. It uses 10-24 screws.
BaseBearing.stl | 135.0KB | |
Bearing_140_mm_inner_diameter_248_mm_outer_diameter.f3d | 152.7KB | |
InnerBearing.stl | 116.7KB | |
MidBearing.stl | 106.7KB |