[mmurray70]

Hi guys, im wondering how many people here have ever broken a pullstud and damaged a spindle? Is it common or just a marketing threat to sell more pullstuds?

Im just starting out and bought most my tooling used from all over the place and i have a bunch of used pullstuds. Id love to use the ones i have obviously to keep cost down but I've heard storys of studs snapping and taking out spindles. Is this really a big concen? Am i safe enough to use unknown pullstuds on light duty tools like small er16 collet holders?

Is this less of a problem with Fadals? The studs look to be more beefy then the haas ones.

[Techman]

Never broke a pull stud. Never. Now, about those Belleville washers on the draw bar. That's a different story.

[bsmiaz86]

IMO, you're playing with fire by using "used" pullstuds. I've broken pullstuds on cnc routers and it's not a pretty sight...or sound for that matter. I'd buy new and have that peace of mind.

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[warrenb]

I've never broken one. The most likely culprit would be someone who thinks you mush apply massive torque to secure the pull stud. There is a torque spec but I don't know what it is off the top of my head. Considering as soon as you install a new stud it is "used" I have used "used" studs on some of my tools. I have swapped holders with other machines that use the same cat40 but different studs.