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Too Much Lathe Runout?

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Too Much Lathe Runout?

#1

Too Much Lathe Runout?

Derek Arita

>I have a Delta 765, 2hp VS lathe. The first time I put a high quality faceplate on it, I noticed a "lobe" to it as it turned...kind of like a cam motion. I was curious, so I put my Vicmarc chuck on it and the lobe was still there, though less pronounced. Turns out, with a caliper on it, there's between .005 on the chuck body, to .008 on the screw flange, of lobe on the chuck. When I throw in a spur center, runout is about .003. My question is, is this going to effect my turnings? Should I try to get this addressed or blow it off? I haven't been turning long enough to really know how much effect this amount of runout will have on a lathe. Thanks for your advice.

Re: Too Much Lathe Runout?

#2

Re: Too Much Lathe Runout?

George Van

>Good question Derek, I too noticed a slight lob, I just got a magnetic mounted dial caliper esterday and have yet to put it together and check my run out. I will watch your post for advice.

Thanks, George

Re: Too Much Lathe Runout?

#3

Re: Too Much Lathe Runout?

Derek Arita

>What kind of lathe do you have and what does your caliper read?

Re: Too Much Lathe Runout?

#4

Re: Too Much Lathe Runout?

Jack

>Hi,

Last year I ran into a similar problem, but being not all that bright I kept blaming dryout of the wood during the turning process. Then I finally got real. I built a jury rig dial indicator thingy that would read out at about 6" radius. Then I set up a rough index and commenced taking readings. I was in denial. They were awesome numbers. Anyway to cut to the chase.

Since my Sears 15" lathe was within warranty I called for help. After the service guy replacing the two main shaft bearings and the shaft itself I redid the measurement and now get variances around .001 to .002. That is good enough for this gov. work.

Jack

BTW: I then went and did the same thing with my two year old high mileage $169.00 HF 1236 and it was close to dead on. Then I did the PM 3520. Same oh, same oh.

Re: Too Much Lathe Runout?

#5

Re: Too Much Lathe Runout?

George Van

>I have a PM 45. I checked the shaft and have +or- .0015� same measurement on the Oneway live center shaft on the tailstock. My controller started humming quite loud so I stopped before I could put the Oneway Stronghold on for a check. I will let you know when I find the trouble with the controller. I still have 220 to the motor so I�m assuming the problem is minor.

Re: Too Much Lathe Runout?

#6

Re: Too Much Lathe Runout?

Derek Arita

>One turner told me that there is no problem with so little runout. He said that all of the work gets turned round anyways. Another turner said that as I turn smaller and finer work, it very well may be an issue. I just want to take care of it now, while it is new, if I have to. By the way, Delta says .010" runout is the tolerance. Seems a bit much to me.

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