Part 3: Attaching wheel hardware

Using AndyMark Plaction wheels

Step 1

Take the Plaction wheel and lay it down as you press a 3/8" bearing into it by hitting a block of wood over top of it with a hammer.

Step 2

Flip the wheels over onto another block of wood, pressing a second 3/8" bearing into the opposite side.

(Note: the wood prevents the bearings from being damaged.)

Step 3

For the outer wheels (4): Place 1 3/4" 10-32 socket head screws through each of the hole in one of the #35 30 tooth plate sprockets. Then place the sprocket with screws through the wheel and tighten each screw down with 10-32 nylock nuts.


For the center wheels (2): Place 2 1/2" 10-32 socket head screws through each of the holes in one of the #35 30 tooth plate sprockets. Next place one .55" sprocket spacer, and another #35 30 tooth plate sprocket. Then place the sprockets with screws through the wheel and tighten each screw down with 10-32 nylock nuts.


(Note: be sure not to over tighten the nut holes in the Plaction wheels, as this may damage the wheel)

Using VEX PRO IFI wheels

Step 1

Insert 3/8" flanged bearings into the center bearing holes of one of the wheel hub plates.

Step 2

Attach Bearing Retainer Screws and Washers to the wheel hub in each location as shown below.

Step 3

Take one of the plates from Step 3 and attach six 8-32 Threaded Standoffs using 1/2" 8-32 screws with nylon patches.

Step 4

Insert the wheel rim pieces into the hub such that all the rim tabs are fully engaged in their respective wheel hub slots.

(Note: Due to the high-tolerances required to create a rigid wheel, the rim pieces may require some "forcing" to insert properly. It is acceptable to slightly bend the rim such that it inserts into the wheel hub.)

Step 5

Attach Bearing Retainer Screws and Washers to a #35 30 tooth sprocket in the same manner as the wheel hub.

Step 6

For the outer wheels (4): Place 1 3/4" 10-32 socket head screws through each hole of the #35 30 tooth sprocket with bearing. Then place the 3/8" sprocket spacers included with the sprockets over each screw. Next place the wheel hub plate and tighten each screw down with 10-32 nylock nuts.


For the center wheels (2): Place 2 1/2" 10-32 socket head screws through each hole in a #35 30 tooth plate sprockets. Next place one .55" sprocket spacer, and then the #35 30 tooth sprocket with bearing. Then place the 3/8" sprocket spacers included with the sprockets over each screw. Next place the wheel hub plate and tighten each screw down with 10-32 nylock nuts.


(Note: be sure not to over tighten the nut holes in the Plaction wheels, as this may damage the wheel)

Step 7

Assemble the other wheel hub to the assembly from Step 6. Ensure all tabs and slots are aligned and fully engaged.

Step 8

Bolt the assembly together using six 1/2" 8-32 screws with nylon patches.