Weld or use coupler?

Question

'm going to lengthen the 1/4 inch diameter shaft by 80mm. It's 11mm long at the moment.I can use brass coupling, or the 1/4" extention shaft could be welded. How easy is it to weld the extention shaft on, and it be true? There is not much length, shaft only protrudes 11mm. Now if the shaft protruded 6", perhaps you could use angle iron to align the two shafts. Not sure you can do that with only 11mm protruding.What would you do, just get a brass coupler because it's so much simpler? TIA.

Nick Mueller · Accepted Answer

It is *very* easy to get it wrong. It is almost impossible to get it right,depending on how much wobble you want.Nick

petercolman45 · Answer

I would set the shaht in a collet in the lathe by the other end, run this end in a steady, drill and tap the shaft and screw and locktite an oversize extension to the shaft. After curing I would turn the extension to size. Peter

Charles Hamilton · Answer

I've seen a LOT of motor shafts that have had repairs using heat, ie welding and metal spraying, and they never hold up, even on big diameter shafts. Far better in your case to turn up an extension which fits over the original and is held I would set the shaht in a collet in the lathe by the other end, runthis end in a steady, drill and tap the shaft and screw and locktitean oversize extension to the shaft. After curing I would turn theextension to size.Peter

Rich · Answer

Okay, folks are telling me, Don't weld that shaft!  I will take that advice. Thanks a lot.

Weld or use coupler?

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