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Re: looking for flexible shaft coupler for 1/2 inch hex
How much load does the coupler need to take? Is this an encoder coupling (i.e., basically no load) or are you looking to actually transfer motion within a mechanism?
If it's the former, your best bet is to turn the shaft down to 1/4'' round and use an ordinary helical beam coupling.
If the latter, you could possibly hex broach a spider coupling.
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