Numenor Posted March 14, 2017 Report Share Posted March 14, 2017 I'm using a 5/16" bit and the appropriate tap but I am still getting my blank slipping on the mandrel once I take away the tailstock if I have to take anything more than a scraping off of the piece. Anyone try a dab of CA to hold it on? Tough to get the finished piece off the mandrel after? TIA Quote Link to comment Share on other sites More sharing options...
Marmotjr Posted March 14, 2017 Report Share Posted March 14, 2017 I make mandrels out of dowels for similar projects, a Bottle mandrel is on my to buy list. If a piece is slipping on my shop made mandrels, i usually wrap the mandrel with a paper towel to tighten it up some. Tissue paper if it's that close. Not sure how that would work with the piece being threaded though. And yeah, I would be worried about the piece not coming off the end cleanly with CA. Some of the not permanent lock tite might do it. EDIT: Are you turning the piece the right direction? The threads on the mandrel should tighten the piece down as it turns, like a chuck or faceplate will. If the piece is coming off the threaded mandrel, your bit or tap might be the wrong size. Might try going a 32nd or so smaller bit, and then tap that. The threads should be a bit more aggressive then. Quote Link to comment Share on other sites More sharing options...
Numenor Posted March 15, 2017 Author Report Share Posted March 15, 2017 I'm using the bit and die recommended by the mandrel manufacturer and turning in the appropriate direction. Too much resistance from a cut over rotates it and tears the threads in the wood. I actually just tried some thin CA on the threads and some activator to give the threads some extra strength before placing it on the mandrel. Worked great but I did keep the tail stock engaged for most of the turning. Held strong for some detail work, burning some rings and sanding. 1 Quote Link to comment Share on other sites More sharing options...
Barron Posted March 15, 2017 Report Share Posted March 15, 2017 Even though you are using the size drill or tap recommended, variations in wood mean that what works in one wood, will be lose in another piece. If it is coming off the mandrel i would definitely try a smaller drill bit. Quote Link to comment Share on other sites More sharing options...
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