Image:
Thanks!
A high strength shaft collar and a high strength pillow bearing
Clamping High Strength Collars
Here are the links for them:
High Strength Shaft Colar: Shaft Collars - VEX Robotics
High Strength Pillow Block (technically could be called a bearing, but the official name is “block”): High Strength Shafts & Hardware - VEX Robotics (set of High Strength stuff).
Here’s a link to directly but only HS Pillow Blocks: High Strength Pillow Block (10-pack)