[sanddrag]

Originally Posted by eugenebrooks

We got a chance to test our 56 mm banebots transmission solution
today, using 12:1 gearing and two cim motors on each transmission.
As noted in the post earlier in this thread, we made new plates and
axle shafts out of 4130 steel, using a square hole, and hardened in
an oil quench at 1600F followed by a temper at 800F. The 4130 is
what we have on hand for heat treated welded parts, we would have
used 4340 for this application (or maraging steel considering the risk
to the function of the robot) if we had bought the material specifically
for it.

Our test was a half hour of ramming the robot into a old tire positioned
against a wall at full power from a distance of a foot or two, back and
forth. The test was stopped when everyone got bored of it. The
transmissions are doing fine with no apparent extra lash, but we have
not yet pulled them apart for inspection. We will do that when time
permits, there isn't all that much time available in the last two weeks
of the build period as we have our share of other problems to solve.

Have fun,
Eugene

What wheel size, tread material, and floor/ground?