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Delta 1460 headstock spindle deflection

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Forum topic by ScrapHeap posted 04-13-2014 06:49 PM 632 views 0 times favorited 8 replies Add to Favorites Watch
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ScrapHeap

17 posts in 384 days


04-13-2014 06:49 PM

Topic tags/keywords: lathe help delta

Hi everyone.
Well, I am trying to get into wood turning.
I had purchased a Delta 1460 lathe last year at an auction.
Up till now, the only thing I turned on it has been a mallet. It turned out fine, and I didn’t notice any issues with it.
Here’s the lathe:

Yesterday, I bought a Nova G3 chuck so that I could start some bowl turning.

I mounted the chuck on the lathe and noticed a wobble.

I decided to try and measure it.
Here are 4 pictures starting from Jaw 1 on the chuck and going through jaw 4.

Jaw 2

Jaw 3

Jaw 4

Basically, at #2 there is .002, #3 = .005, #4 = .003.

How much of a problem is this?
My gut feeling is that I could replace the spindle.
However, it doesn’t appear that there are any out there to be had.
Looking for some input from the experts out there.

Thanks a lot.
Tom


8 replies so far

View Wildwood's profile

Wildwood

1239 posts in 882 days


#1 posted 04-13-2014 07:21 PM

What is the run out on just the lathe spindle? That would be my primary concern. Most manufacturers will tell you .003 to .005 very acceptable ranges on a new lathe.

I would not worry about .003 run out on your chuck when turning bowls not sure most turner’s would.

-- Bill

View Shawn Masterson's profile

Shawn Masterson

1262 posts in 696 days


#2 posted 04-13-2014 09:33 PM

do us a favor. chuck up some scrap and turn a cylinder. then check the cylinder.

View SCOTSMAN's profile

SCOTSMAN

5586 posts in 2333 days


#3 posted 04-13-2014 09:58 PM

Please watch to see one if your chuck is going all the waay back untill it touches the register on the spindle ! And if not whay not? please then check to make sure it’s all clean it sounds like something is stopping it from coming into absolute contact with the spindle register, that is vitaly important, and sometimes it is just a little bit of wood dust wood chip which comes between them both causing a considerable runout.I have seen this many, many, times. Alistair

-- excuse my typing as I have a form of parkinsons disease

View TheDane's profile

TheDane

3980 posts in 2411 days


#4 posted 04-13-2014 10:28 PM

ScrapHeap—I have two of the Nova G3 chucks (1” x 8tpi) ... both of mine are dead on, but I have seen a few reviews indicating that other users had ‘wobble’ problems with them. I would follow the advice offered above by Bill, Shawn, and the Scotsman. If you don’t find runout on the spindle itself, contact the seller for a replacement.

-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"

View ScrapHeap's profile

ScrapHeap

17 posts in 384 days


#5 posted 04-14-2014 03:11 AM

Hey thanks for the great responses.
I have some questions about your request, Shawn. Did you want me to turn a cylinder using the old style chuck.(I don’t even know what it’s called.) or were you wanting something turned using the new Nova chuck? Also, if you are suggesting that I turn something with the Nova chuck, should I do it without the tailstock?

Also, I am not sure what ‘runout’ is or how to measure it. Is the amount of longitudinal movement of the spindle in the headstock?

I did check to make sure that the chuck was all the way back as far it will go.

I did turn a pen this afternoon and it came out okay.
On that note, Gerry, when I put the mandrel in the headstock and turned it without the tailstock, I could see the same wobble. So, I am thinking that the problem is not the chuck, but the lathe.

I’ll try to get a cylinder turned tomorrow. Maybe it will work out okay.

Thanks again.

View TheDane's profile

TheDane

3980 posts in 2411 days


#6 posted 04-14-2014 03:20 AM

Runout is the radial variation from a true circle … in other words, wobble.

-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"

View Wildwood's profile

Wildwood

1239 posts in 882 days


#7 posted 04-14-2014 11:37 AM

If you remove the chuck from spindle and do the same measurement check will see if have run-out or not at the headstock. If you have some run out at the headstock, it will increase as you accessories like a chuck. If have no run-out at headstock spindle the chuck is the problem.

This video can explain it better than I can. You should measure inside & outside of headstock spindle for run-out. Johnny explained why in another of his video’s could not find this morning.

https://www.youtube.com/watch?v=16xBV3PggQI

-- Bill

View ScrapHeap's profile

ScrapHeap

17 posts in 384 days


#8 posted 04-14-2014 12:42 PM

Thanks for the link. I will try to measure that. I don’t have nice dial indicator with a magnetic base like in the video. I also dropped the one I had yesterday and the lens broke. Maybe it’s time for a new one.

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