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Note: This item is obsolete and no longer available.
Product Overview:
This wheel design incorporates a novel way of attaching tread, and also allows for sprockets to be mounted on both sides of the wheel. This wheel can be driven with a 1/2" hex shaft, or with a sprocket.
Specification:
- Material: 6061 Aluminum
- Weight: 0.854 lbs.
- Diameter: 7.60 inches, without tread (8.0 inches with tread, not included)
- Tread Width: 1 inch
- Bore: 1/2" hex
- Load Capacity: 500 pounds*
- Tread Mounting Holes: 6 threaded thru holes for #10-32 screw on a 1.875" dia bolt circle
* Load Testing: we applied 700 pounds on the location of the opening for the treads, and had no rim deflection.
Usage:
There are three ways to drive this wheel. One way is with a 1/2" Hex
Shaft, another is an Axle and Hub, and the other is with a Sprocket. To
attach a sprocket on the side of a Performance wheel use
#10-32 x 5/8" screws (3 or 6)
With Axle and Hub:
- This wheel can simply be driven by a 1/2" hex axle. However, if you wish to drive this wheel with an Axle and Hub, you can pick your hub by fitting any of the AndyMark hubs to this wheel. Hubs are NOT included in
the price of the wheel. If this is your choice, then no bearing is
needed. To install a hub onto a 6" Performance Wheel, use
Hardware Kit 3.
With Sprocket:
- One sprocket on one side: To drive this wheel with a sprocket,
(or to drive another wheel with propulsion from this wheel) then the
sprocket needs to be attached to the side of the wheel, outside of a
250 Sprocket Spacer. Use Hardware Kit 3, which includes the screws for this.
- Two sprockets,
one on each side: One side of the wheel has no recess, so that side
will only need a 250 Sprocket Spacer to space the sprocket out from the
wheel. In order to put a sprocket on the other side, use a
550 Sprocket Spacer to get the sprocket out far enough so that the chain clears the edge of the wheel.
Here is a new method for attaching tread to an AndyMark performance
wheel. This method was designed and tested by three experienced
FIRSTers, Aren Hill, Austin Schuh, and Adam Heard, during the 2012 FRC
season. In this design, the tread, wraps around the wheel,
through a slot, and is secured with a zip-tie to an anchor point. The
pictures below show tread being attached to a 4" Performance Wheel. 6"
and 8" wheels follow the same steps. Here is the recommended method for
installation:
-
Prepare tread: Cut
tread to a length long enough to wrap around the wheel with a 1”
overlap. Narrow each end of the tread about 3/16” on each side, leaving
about 1/2" to 5/8" tab centered on the tread. This allows excess length
of tread to fit through the slot and into the center of the wheel. To
make assembly easier, it is also useful to sand down the tread on the
narrowed ends. Make one hole on each end centered at minimum 0.25” away
from the end of the tread to allow a ziptie to pass through.
- Put both ends of the tread together with the rubber sides facing
each other. Place a strong ziptie (am-1189 recommended) through the
holes in the tread. Do not connect and close the ziptie yet!
-
Thread the ziptie and the ends of the tread through the slot on the performance wheel.
- Flip the tread so the rubber side is facing outwards and wrap around wheel.
- Secure zip tie to the anchor point between the wheel spokes.
- Congratulations! Your wheel is complete.
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