Materials and 3D Printing?

[bernard]

How would you attach bearings to the extrusions? Also, wouldn't that be heavy compared to just printing the sides?

You could use flanged bearings fixed with adhesive (epoxy) to the rim of holes drilled in the aluminum.

Why not just normal bearings friction fit into the drilled holes? Not sure if this could be done with the carbon fiber rods though.

The flanges can help with aligning the bearings with the chassis and give an easier surface for applying adhesive.

[sciencecat42]

You could use flanged bearings fixed with adhesive (epoxy) to the rim of holes drilled in the aluminum.

Why not just normal bearings friction fit into the drilled holes? Not sure if this could be done with the carbon fiber rods though.

The flanges can help with aligning the bearings with the chassis and give an easier surface for applying adhesive.

I see how the flanges could help with alignment, but is adhesive necessary if the bearings fit with a close enough tolerance?

[MadCow2357]

Why not just normal bearings friction fit into the drilled holes? Not sure if this could be done with the carbon fiber rods though.

The flanges can help with aligning the bearings with the chassis and give an easier surface for applying adhesive.

I see how the flanges could help with alignment, but is adhesive necessary if the bearings fit with a close enough tolerance?

No. I got away with unglued bearings throughout the battery buggy season last year . I just used a bunch of hex nuts and washers to smash the stuff together. It worked ¯\_(ツ)_/¯. I'd still use adhesive in the end, however.

[PM2017]

The flanges can help with aligning the bearings with the chassis and give an easier surface for applying adhesive.

I see how the flanges could help with alignment, but is adhesive necessary if the bearings fit with a close enough tolerance?

No. I got away with unglued bearings throughout the battery buggy season last year . I just used a bunch of hex nuts and washers to smash the stuff together. It worked ¯\_(ツ)_/¯. I'd still use adhesive in the end, however.

You shouldn't need to glue the bearings if you've drilled/printed it properly. Also, when I'm attaching my bearings to the bearing block, I normally have to use a clamp or a vise grip. That's how tight it should be.

[as1092]

3d printing connectors, using cf rods to construct the chassis.

What is a connector? I thought you just print out the two sides of the frame and then use the axle to connect the sides of the frame, with a bearing in the hole of the axle to reduce friction. How does a connector work in this situation?