The sprockets

I’m new to VEX IQ system, and i was trying to modify Armbot IQ by adding treads and sprockets and motorise them, but the problem that the sprockets shaft holes are very small, i mean that you maybe not able to insert a shaft to it, and if you do, you’ll never be able to get it out, so is that normal ? and is there any solution ?

Hi Ahmad,

We’re sorry that you have encountered this issue. All of the square shaft holes and round pin holes are designed to close tolerances to ensure they have appropriate resistance to unintentionally falling apart, but are still easy enough to be assembled and disassembled by hand.

It can be easier to use a beam to give extra leverage when adding small gears or sprockets to a shaft, such as shown on the top portion of the Kit Contents Poster. If you have any additional questions or concerns, please contact VEX Technical Support at or by calling 1-903-453-0802.


  • Art