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NEMA 17 Sprung Suspension Swing Arm
A swing-arm suspension pod that bolts a NEMA 17 drive motor to a rover chassis through an 8 mm rod pivot, with an integrated printed leaf spring that keeps the wheel loaded over bumps. Motor face uses the 31 mm M3 bolt square with a 22.6 mm clearance bore for the 22 mm pilot boss; the pivot hub is a 16 mm long 8.3 mm bore (slip fit on 8 mm rod) set 95 mm from the motor axis, and the leaf tip pad bears on a chassis stop. Overall 127 x 48 x 16 mm, printed flat so all bending load runs in the XY plane instead of across layer lines.
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