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Lathe Runout

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Forum topic by DonBoston posted 11-23-2017 03:03 PM 352 views 0 times favorited 12 replies Add to Favorites Watch
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DonBoston

81 posts in 1297 days


11-23-2017 03:03 PM

Hi y’all, I have a Rockler Excelsior (aka, over priced harbor freight 10xx18) which has developed some run out.

Every bowl that I turn, will end up with opposing spots which won’t sand down due to this. I can feel the run out when I’m cutting or sanding, it’s a very slight wobble and it’s really starting to get on my nerves. At first, I thought perhaps it was the jaws, so I went and bought a new set and it’s producing the same results.

So, before I go spend 500 on a Nova Comet II, I’d like to see if there is a way to fix this one. Has anyone else experienced lathe runout, and if so, how do I correct it?

-- Don Boston RECreations by Don http://recreationsbydon.com


12 replies so far

View putty's profile

putty

1158 posts in 1442 days


#1 posted 11-23-2017 03:14 PM

does it do the same while spindle turning with no chuck?

-- Putty

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DonBoston

81 posts in 1297 days


#2 posted 11-23-2017 03:24 PM

If I use my little pen mandrel, ya, I can feel it there too just not as much.

Sadly, I don’t have a dial to try and measure it at the collar.

-- Don Boston RECreations by Don http://recreationsbydon.com

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Lazyman

1503 posts in 1223 days


#3 posted 11-23-2017 04:18 PM

How old is it? I would call Rockler support and see if they can offer any advice. Might actually be easy to fix if it is just a bearing. I called them a few months ago because the locking bolt on the tail stock spindle had stripped out. They sent me a new tail stock and bolt (I had to transfer the quill and axis to the new one) completely free. Lathe was nearly 2 years old at the time. Couldn’t hurt to call.

-- Nathan, TX -- Hire the lazy man. He may not do as much work but that's because he will find a better way.

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Hockey

90 posts in 247 days


#4 posted 11-23-2017 04:22 PM

Don, do you have a dial indicator to measure the spindle to see if there actually is runout, and if so, the amount?

Does the spindle have any slop in it (best way to tell is with dial indicator) if you try to move it by hand (with lathe first unplugged from power source and belt taken off the spindle pulley) side to side which could be a sign of the bearings being worn?

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DonBoston

81 posts in 1297 days


#5 posted 11-23-2017 04:45 PM



How old is it? I would call Rockler support and see if they can offer any advice. Might actually be easy to fix if it is just a bearing. I called them a few months ago because the locking bolt on the tail stock spindle had stripped out. They sent me a new tail stock and bolt (I had to transfer the quill and axis to the new one) completely free. Lathe was nearly 2 years old at the time. Couldn t hurt to call.

- Lazyman

I have no idea how old it is. I’ve owned it for maybe 3 yrs, and bought it used off of a gentleman here on the forums. With it being manufactured by someone else and just relabeled as theirs, I doubt they’d support/replace something like this.

-- Don Boston RECreations by Don http://recreationsbydon.com

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DonBoston

81 posts in 1297 days


#6 posted 11-23-2017 04:46 PM



Don, do you have a dial indicator to measure the spindle to see if there actually is runout, and if so, the amount?

Does the spindle have any slop in it (best way to tell is with dial indicator) if you try to move it by hand (with lathe first unplugged from power source and belt taken off the spindle pulley) side to side which could be a sign of the bearings being worn?

- Hockey

I really wish I did, but no I don’t have a dial indicator. There’s no back and forth on the spindle, feels pretty tight.

-- Don Boston RECreations by Don http://recreationsbydon.com

View Wildwood's profile

Wildwood

2186 posts in 1970 days


#7 posted 11-23-2017 04:59 PM

Had this set up bought on sale many years ago to measure run out which worked well for me.

https://www.harborfreight.com/multipositional-magnetic-base-with-fine-adjustment-5645.html
https://www.harborfreight.com/1-inch-travel-machinists-dial-indicator-623.html

If don’t want to buy a dial indicator maybe able to take your mini lathe to local welding/machine shop and have them check it out.

I started measuring with nothing on lathe spindle, next installed my chuck and measued at chuck body, also my drive centers and faceplates everything ran true.

Unless you have bad bearing lathe spindle should not read more than couple thousands out. Everytime you add or install something on or in the spindle you can increase run out some depending upon the accessory.

Recommended cure all for run out often is replace the bearing which may or may not help. If more than 5 to 6 thousands out might have a bent spindle. ‘

Good luck with it.

-- Bill

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DonBoston

81 posts in 1297 days


#8 posted 11-23-2017 05:50 PM



Had this set up bought on sale many years ago to measure run out which worked well for me.

https://www.harborfreight.com/multipositional-magnetic-base-with-fine-adjustment-5645.html
https://www.harborfreight.com/1-inch-travel-machinists-dial-indicator-623.html

If don’t want to buy a dial indicator maybe able to take your mini lathe to local welding/machine shop and have them check it out.

I started measuring with nothing on lathe spindle, next installed my chuck and measued at chuck body, also my drive centers and faceplates everything ran true.

Unless you have bad bearing lathe spindle should not read more than couple thousands out. Everytime you add or install something on or in the spindle you can increase run out some depending upon the accessory.

Recommended cure all for run out often is replace the bearing which may or may not help. If more than 5 to 6 thousands out might have a bent spindle.

Good luck with it.

- Wildwood

That’s affordable. I’ll pick that up on Saturday and do some measurements. I’d like to repair this one, just so that I’m not spending my profits. But, that Nova sure does look a lot nicer, hahaha

-- Don Boston RECreations by Don http://recreationsbydon.com

View Hockey's profile

Hockey

90 posts in 247 days


#9 posted 11-23-2017 06:29 PM

Don, I have the Nova Comet, and it is very nice.

View Rick_M's profile

Rick_M

10614 posts in 2215 days


#10 posted 11-23-2017 08:27 PM

Dial indicator is nice to have but you can measure run-out with a feeler gage and anything fixed close to the spindle, even the tool rest, or piece fixed in the jaws. Don’t use wood, use metal.

If run-out is the problem, I would replace the bearings with quality American, German, or Japanese bearings.

-- http://thewoodknack.blogspot.com/

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MrUnix

5990 posts in 2034 days


#11 posted 11-23-2017 11:39 PM

That’s affordable. I’ll pick that up on Saturday and do some measurements. I’d like to repair this one, just so that I’m not spending my profits. But, that Nova sure does look a lot nicer, hahaha
- DonBoston

A dial indicator won’t help fix it, only confirm there is a problem. Pull the spindle and make sure it’s not bent and check the bearings first. If you do want to get a dial indicator, which is really useful for a lot of other stuff as well… spend the extra $5 and get a kit that has a case and different replaceable tips, like this one on Amazon:

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

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DonBoston

81 posts in 1297 days


#12 posted 11-24-2017 12:27 AM

Thanks y’all, at least I have a direction to look now.

-- Don Boston RECreations by Don http://recreationsbydon.com

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