Quote:
Originally Posted by DonShaw
There are other sources for pneumatic wheels.
for one
http://www.wheelchairparts.net/power-chairs/
Yes you may have to do some modifying but there are alternatives. Teams that have used Colson wheels in the past had to modify them.
Andymark does a great job in my opinion! |
There have been a couple "just modify some other wheels" posts in this thread and others and I would love to get a little more information about how one would go about doing that. The comments seem to be directed at all teams rather than "higher resources" teams, so we'll try to figure out what an average team that is using the KOP chassis would need to do.
Assumptions: This is an average team with tool resources such as drill presses, band saws, chop saws, cold saws, etc. No shop resources such as lathes, mills, CNC, etc. As this thread is asking about using the KOP chassis, we will need to fit these wheels to that chassis.
Let's take those wheels you, DonShaw, posted as an example. Most have a 5/16" bearing in the center. The Kit chassis has a 3/8" hole for front and rear axles. Ideally the 5/16" bearing can be swapped for a 3/8" bearing, but there is no bore size listed on that site. If the bore size is 0.865" I assume the team would have a problem with fit for the bearing? Is this correct?
If the above problem is solved, now we have to mount the pulley to the wheel. It looks to me like the screws already in that wheel will interfere with the AM pulleys mounting holes. Is it worth it to go without the mounting holes that interfere? Also, drilling and accurate hole in that slope looks challenging. Can you give any recommendations for keeping your holes straight and within reasonable tolerance when drilling at such an extreme angle?
And just to make this a bit more broad, can anyone suggest methods for wheel that come without a useful bore size? Such as wheels whose bearings don't naturally fit with the KOP bolts? Re-drilling a drivetrain mount point poorly can wreak havok on a low-resource team's season. Any suggestions that make attempting it more worth it than simply waiting for backordered parts?