Methods of sticking 2 materials together?

Yo-Yo Mods and Maintenance
1

What’s the most efficient method of binding 2 materials together (e.g. in a bi-metal) other than press fitting?

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2

ummm, glue???

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3

Threading

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4

Duct tape.

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5

Uh, by this do you mean we thread the rims together? That’s quite a good idea if I’m honest