Scioly.org

Bearing questions!

Last year, I made sure to get ABEC-9 rated bearings, but evidently, the ABEC rating system applies to bearings under heavier loads compared to an ETV. The bearings came with a lot of lubricant inside, which slowed down our ETV. I had to remove the lubricant with isopropyl. After 3-4 washes in isopropyl, they appeared to run smoothly under lighter loads, but they would still gunk up over time. I tried using graphite powder lubricant, but that just slowed them down even more.

Anyone know where to get un-lubricated bearings? Are there better strategies for maintaining bearings? Should I be using bearing shields? Thanks, and gl everyone!

We have typically used mounted bearings from either McMaster-Carr or Servo-City. For scrambler vehicles I'd recommend 4mm or 5mm axles or their imperial measurement equivalents.

BobaTeaTastesGood wrote: ↑November 3rd, 2023, 9:17 am Anyone know where to get un-lubricated bearings? Are there better strategies for maintaining bearings?

skateboard bearings have worked decently as well as pretty much every small uxcell bearing you can get from amazon
the small ones dont come with a lot of grease and you can make them run even smoother by soaking them in wd40
also make sure you're not using any glue to secure your axle into your bearing

BobaTeaTastesGood wrote: ↑November 3rd, 2023, 9:17 am Should I be using bearing shields?

for the most part i've found it doesn't really matter but it certainly doesn't hurt, most cheap and smaller bearings are shielded anyways

Track width....

I am still confused about the track width. I need to figure out if my calculations for the turn need to be further accomadated for width or not....so far I have not read anything about the width only that the terminal barrier will atleast be 1.00 m long

SixteenthSakura wrote: ↑December 15th, 2023, 10:37 pm Track width....

I am still confused about the track width. I need to figure out if my calculations for the turn need to be further accomadated for width or not....so far I have not read anything about the width only that the terminal barrier will atleast be 1.00 m long

There is an FAQ that states the minimum track width of 2.0 m. See link (https://www.soinc.org/there-minimum-or- ... th-track-0).

I would recommend that the vehicles stay within this minimum track width. Some event spaces may not be able to provide space beyond the minimum width. The vehicle's curve should clear the bucket at 8.0m and still stay within the track width at 12.0 meter target distance. Unless a team has an adjustable steering for different distances.