in my limited knowledge the collet will "snap" into the collet nut and mine will spin a bit, it does not take very much pressure to accomplish this, then we slip the bit in for tightning!! bought some amana bits at woodzone.com, their main store is here and the website is for hobbyist, while there i got amana's catalog there is a very good section on keeping all interior parts of collets clean as debris will prevent correct tightning of bits there is a lot of good info there jim |