Originally Posted by Fe_Will (Post 902611)

Why not use a Banebots P80 gear box? It would be smaller, more compact, and more efficient.

Originally Posted by Fe_Will (Post 902611)

Why not use a Banebots P80 gear box? It would be smaller, more compact, and more efficient.

Originally Posted by mathman05 (Post 902543)

I'm sure this will be the same gear ratio as the AM Toughboxes. It looks like they're using the same gears, they're just using a different housing.

Originally Posted by craigboez (Post 902634)

Also, aren't planetary gears less efficient than spur gears? I couldn't find anything too official, but this
website seems to agree.

Originally Posted by Wikipedia

Advantages of planetary gears over parallel axis gears include high power density, large reduction in a small volume, multiple kinematic combinations, pure torsional reactions, and coaxial shafting. Disadvantages include high bearing loads, inaccessibility, and design complexity. The planetary gearbox arrangement is an engineering design that offers many advantages over traditional gearbox arrangements. One advantage is its unique combination of both compactness and outstanding power transmission efficiencies. A typical efficiency loss in a planetary gearbox arrangement is only 3% per stage. This type of efficiency ensures that a high proportion of the energy being input into the gearbox is multiplied and transmitted into torque, rather than being wasted on mechanical losses inside the gearbox.

Another advantage of the planetary gearbox arrangement is load distribution. Because the load being transmitted is shared between multiple planets, torque capability is greatly increased. The more planets in the system, the greater load ability and the higher the torque density.

The planetary gearbox arrangement also creates greater stability (it's a balanced system) and increased rotational stiffness.