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Mechanics

Parts:

Boston Gear PLB3060SF09-5/16 Timing Pulley, 3 mm Pitch, 60 Grooves, 9mm Wide Belts, 0.313″ Bore Diameter, 2.226″ Outside Diameter, 0.813″ Overall Length, Lexan with Aluminum Insert, Single Flange

pulley

-Fiberglass-reinforced polycarbonate resin thermoplastic for light weight and low noise

-Stock bore with 0.313″ diameter does not require use of a bushing

Link to Amazon product page
The Only problem we had with this pulley is that it has a 0.313″(7.9502mm) Bore Diameter. Although it was the closest in size to the servo motor’s 8mm shaft, the shaft would not fit in. So, we used a drill to enlarge the bore diameter. This shaft is much lighter in weight than pulley made of steel, and so far it hasn’t had any problems handling the torque.
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weight
Image showing total weight of the system 3.31Kg(Including backpack, arm brace, battery and electronics)

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