B. ( B9-0429)
treads are made from Rubber Horse Stall Mats, something like:
I got mine at a local feed store so the link may not be the exact
same ones. These were easily notched and cut with my radial arm
and table saw. Stacking two of the same sized blades in a radial
arm saw and setting the correct depth cuts great tread notches.
Cost for one 4’x’6 mat is about $40. One mat is enough
rubber to make about 6 sets of treads. Many mats are made from
recycled rubber and anyone using this method needs to make sure
they find the virgin rubber ones that won’t tear apart.
- I cut all
the aluminum wheels on my metal lathe and used 3/8” steel
axels. http://www.mcmaster.com/, has great nylon bearings part
numbers 6389K445 and 6389K625 that work great in the tread section
with the 3/8” axels.
- My motors
are standard wheelchair motors and those with the casters make
my B9 very mobile. The treads don’t actually touch the
ground, but are rather driven by a chain drive that is connected
to the wheel chair motors. The tread “drive” wheels
are knurled for gripping on the treads all the other idle wheels
are smooth. All the gears and chains can be found on http://www.mcmaster.com/.
- I used
ratcheting truck tie downs to attach my torso section to the
tread section. Something like: http://shop.easternmarine.com/index.cfm?fuseaction=catalog.prodInfo&productID=5336&categoryID=232
(I got mine at K-Mart). These are strong, easy to install and
very easy to remove for disassembly.