FIGURE 4. Gearbox
mounted in channel.
FIGURE 6. Stainless steel tubing.
FIGURE 7. Delrin gear racks.
78 SERVO 08.2013
structure, arm, or legs for a prototype
used to mean a trip to Home Depot
or similar location for some angle
aluminum or steel stock.
One of the things that stands out
about ServoCity (in my opinion) are
the very functional structural
channels, beams, and tubes that robot
and mechanical system builders can
use to create numerous structures and
arrays. No more hack sawing and
filing stock to fit.
The 6061-T6 aluminum channels
shown in Figure 3 come in 10 lengths
from 1.5” to 24” and are very robust,
both from a bending moment point of
view and from resistance to twisting.
Figure 4 shows an important
attribute of these 1.5” x 1.5” external
dimensions by 1.31” internal width
channels that can hold large servos, as
well as numerous fittings and
No more trying to drill precise
holes spaced how you want them —
these holes are sensibly spaced and a
builder can accurately mount
numerous motors, servos, brackets,
and other structural members to the
ServoCity’s line of stainless steel
solid shafting comes in 1/8”, 3/16”,
1/4”, 5/16”, 3/8”, and 1/2”
diameters, in one inch increments
from 1” to 12” long. They also have
1/4” D shafts to 3” in length.
The shafting is not normally used
as structural members but to transfer
rotary motion from one location to
another. The hollow aluminum and
steel tubing is also useful to transfer
rotational movement from one point