5/8-11 RTK Antenna Mower Riser
A 53 mm tall pedestal that raises a 5/8"-11 RTK GNSS antenna (the Ardusimple and u-blox survey types) above a robot mower or homebuilt rover shell. It is not tied to one chassis model: a 90 x 60 mm base has four M4 slots that fit hole spacings from 54 to 78 mm by 40 mm. A 5/8" bolt goes up through a 16.8 mm hole in a 60 mm antenna deck. Its 15/16" hex head sits in a 25 mm-wide open tunnel whose walls stop it turning while you spin the antenna on, and a 20 mm port in the floor lets the coax drop into the chassis.
outdoor gnss rtk robot-mower