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X Arm Tip Idler Roller
The far-end block for the 'NEMA17 Cantilever Pen Plotter' kit's X arm, about 54 x 57 x 74 mm. It clamps the ends of two 8 mm rods set 40 mm apart in 25 mm pinch sockets (M3x16 screw plus a captured M3 nut in each). Two cheeks hold a 608 bearing as the GT2 belt idler on an 8x25 mm dowel, locked by an M3x10 self-tap screw. Below, a fork carries a 624 bearing on an M4x20 axle in a height-adjustable slot, so the arm tip rolls on the desk and can be levelled. It prints upside down, standing on the flat tops of the cheeks and clamps.
🧩 Part of the NEMA17 Cantilever Pen Plotter (X rod ends, X belt idler, levelling roller foot) kit.
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