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Help/Question with a Rikon mini lathe

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Forum topic by Tim Dahn posted 07-27-2014 03:45 PM 370 views 0 times favorited 5 replies Add to Favorites Watch
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Tim Dahn

1467 posts in 2219 days


07-27-2014 03:45 PM

Topic tags/keywords: question

I have some wobble in my lathe, so much so that when I rough out a piece and lay my tool on top to check for round the “tapping sound” never goes away completely. So today I checked it and found the spindle shaft has about 2 thousandth’s run out or wobble. So at the tail stock end… well who knows.

Anyone know if this is considered normal or not? I plan to call Rikon tomorrow but wanted to hear from the LJ community before I call.

Any input would be appreciated.

-- Good judgement comes from experience and experience comes from poor judgement.


5 replies so far

View REO's profile

REO

614 posts in 728 days


#1 posted 07-27-2014 04:16 PM

if it is truly runnout and not bad bearings the CUT will always be concentric with the axis of the bearings. runout will always be eliminated by turning the piece. that is how multiple axis turnings are done, by mounting successive operations on different axis. The axis being turned will always be concentric with the axis. there are things that can effect the roundness of the part, dull tools, hard and soft grains, tool presentation, voids, etc.

View TheDane's profile

TheDane

3780 posts in 2317 days


#2 posted 07-27-2014 04:17 PM

.002 is pretty close to no run-out. This has been under discussion in another thread ( http://lumberjocks.com/topics/62699 ).

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

View Tim Dahn's profile

Tim Dahn

1467 posts in 2219 days


#3 posted 07-27-2014 07:51 PM

Thanks for the info. Tools are sharp, noticed on cedar and the hard/soft grain did not occur to me. I noticed after taking light cuts to make the piece round I am able to make a very light groove about 3/4 of the piece and no groove on the other 1/4. Off to read the other thread, thanks guys.

-- Good judgement comes from experience and experience comes from poor judgement.

View Wildwood's profile

Wildwood

1037 posts in 789 days


#4 posted 07-27-2014 09:16 PM

Wish you would post a picture so could see what you are talking about. Early/late wood hard to distinguish on cedar are you talking about sap/heart wood?

Not at all sure about what you are trying to do!

“I am able to make a very light groove about 3/4 of the piece and no groove on the other 1/4.”

Agree with REO & Gerry, run out is not your problem.

Many things can contribute to out of round spindle blanks. Definitely no idea about your groving sistuation!

-- Bill

View Roger's profile

Roger

14566 posts in 1458 days


#5 posted 07-27-2014 11:55 PM

When you bring your tailstock to your drive center, they should be exact. The points should be dead even.? Just my thoughts. I don’t know what you could do to correct that.

-- Roger from KY. Work/Play/Travel Safe. Kentuk55@bellsouth.net

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