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Use Bearing Flats (V5)
Bearing flats help reduce the friction when an axle or drive shaft turns in the metal square holes. Many teams use screws and nuts rather than pop rivets to keep the bearing flats fixed to the metal.
Use Spacers Instead of Shaft Collars
Many times student try and use shaft collars to keep gears and wheels in place. They often come loose and then the gears or wheels move around on the axle or drive shaft. Instead, use spacers to keep gears and wheels where you want them.
Make Sure Axles and Drive Shafts Are Supported in TWO places.
The axles and drive shafts need to go through two pieces of metal, not just one. See Chassis page to learn more.
Stay Within Size Constraints!!!
By the time you add the bearing flats, motors, and axles to the chassis, it usually ends up being bigger than expected. To accommodate for this, design your chassis to be smaller than the 18" x 18" requirement and you will not need to deal with rebuilding or being disqualified at a competition.
*VEX IQ: Check the game manual for size constraints, usually 11" x 19" x 15"
*VEX IQ: Check the game manual for size constraints, usually 11" x 19" x 15"