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Lathe run-out problems

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Lathe run-out problems

#1

Lathe run-out problems

Stephen DiCenso

>I have a fairly new Fisch Mini Lathe model TC 90-100. I notice the other day that it was vibrating a little. I checked everything on the lathe to make sure nothing was loose. I started to check the front and back of the headstock. The front tip of the head stock spindle has about .010 to .015 run-out and it is about .020 to .025 at the round knob just outboard of the spindle pulley as checked with a dial indicator. These are +/- .010 as I had some trouble stabilizing the dial indicator. Any thoughts. All I have turned so far are pens. The only way I happened to notice this was cause the last pen I turned never seemed to get completely round. I sounded like I had a flat spot. The pen mandrel could be part of the problem, but I does this even when the mandrel has been removed. Any recommendations.

Thanks,

Steve

Re: Lathe run-out problems

#2

Re: Lathe run-out problems

Whit

>That seems to be a fair bit of runout compared to my Nova Dvr 3000, but another, more likely cause comes to mind. I've done this. When you mount your mandrel between the headstock and tailstock, if you put too much pressure from the tailstock, the mandrel will bow producing out-of-round pens, etc.

Hope this is of some help and good luck.

Whit

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