Robotics Education & Competition Foundation
Online Challenges

HS Pillow Block Bearing

1

elihamaker
Entry ID #: 7919
Created: Mon, Sep 21, 2020 3:44 PM


Why I created it:

When scrolling through the Vex Products I noticed there wasn't a HS pillow bearing.  Seemed like an interesting project and I decided to upload to online challenges.

How I created it and what I learned:

I first collected data on what the dimensions for the HS pillow bearing should be. Based off the ratios between HS bearing and LS bearing and the ratios between the LS bearing and LS pillow bearing.

  • Diameter for center hole in HS pillow bearing should be 3.07 inches (Same as HS bearing)
  • Bracing around HS pillow bearing should be 0.185 inches (Just chose the largest Size I could do while still being able to fit a screw easily)
  • Fillet points around HS pillow bracing should be 0.068 inches apart (Same size as LS pillow bearing since this part doesn't really matter)
  • How long the center hole in HS pillow bearing should be 0.4 inches (This is done so the end of the hole is flush with the edge of the bearing base.  This makes printing it on it's side much easier)
  • Thickness of bearing base that connects to screws should be 0.125 inches (The ratio between LS bearing and HS bearing is 1.  So that means the HS pillow bearing should have the same thickness as the LS pillow bearing)
  • There are 2 holes supporting the bearing and they're 1 inch apart (Same as all the other bearings) 

Current season applications:

Weight is a VERY important thing to optimize for this season since people are running at higher speeds everywhere unlike Tower Takeover where most people were running at lower speeds.  But you also don't want to risk the structural integrity of your robot.  By using HS pillow bearings we can brace rollers off of the main structural support to have more optimal roller placement while still being light and strong.  Without having to add another c-channel (Which could be too heavy) or a normal pillow bearing (Which wouldn't be strong enough).  Another benifit is that you don't have to drill into c-channels to have a high strength axle.  I would most likely use this on my intakes since it has some issues with the axles moving around to much in a LS bearing.

2.0.9313
Active Plan: Fusion 360, Student
Windows 10 (18363)

Links / Videos

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