Track Keel Skid Rail
A 40 mm long bolt-on skid rail (print 2) for the 'N20 Twin-Track Mini Tank Chassis' kit. It holds the lower run of the 12 mm-pitch track down between the drive and idler axles, and a 10 mm wide keel rides in the links' centre band. It attaches to the Tank Hull Tub side wall with two M3x12 SHCS and M3 nuts through 3.4 mm holes at x ±12 mm. The rail has a 45° stiffening gusset, counterbored head pockets and 3 mm lead-in chamfers on the keel.
robotics kit tank track