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Thread: bolt down or machine feet
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22nd April 2011, 12:22 PM #1GOLD MEMBER
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bolt down or machine feet
hi can some one please point me to a thread that deals with the correct way set up a 9"c on a hercus cabinet.
i have mine dyna bolted to the concrete floor at the moment with very dence rubber and shims supporting it.
i know this isnt normal way to set up a lathe.
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22nd April 2011 12:22 PM # ADSGoogle Adsense Advertisement
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22nd April 2011, 12:58 PM #2
The Hercus.
Hi azzrock,
I was always lead to believe that Sheet Lead was far better.
The older Lead was slightly thicker & 2 pieces worked well. Cuts Vibrations & Noise.
If you wish to change, you just cut a U shape out & slip it under.Regards,
issatree.
Have Lathe, Wood Travel.
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22nd April 2011, 02:08 PM #3GOLD MEMBER
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nice mr tree. very interesting. the rubber im using is like steel belted. its used to put under very large gantry rails. 100 t plus. i can see why lead would have its advantages.
im really wondering if i should do a final level and bolt it down or make some machine feet for the old thing
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22nd April 2011, 02:13 PM #4GOLD MEMBER
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Each to there own but for a lathe the size of a Hercus I wouldnt worry about bolting it down.
Level it preferably with an engineers level,use a reasonable size packer under each of the 4 corners of the cabinet ,say around 3" to 4" square or rectangular in a variety of thicknesses.
Wouldnt worry about rubber or anything to absorb shock etc.
You want the lathe seated on a base that has eliminated rock.
Generally for the size of the machine you wont be doing anything to big,probably your worst case would be useing the Face plate or 4 jaw with a job offset and not counterweighted.
If this is the case and the lathe appears to get the death wobbles slow it down or counterweight it.
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23rd April 2011, 12:50 AM #5GOLD MEMBER
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thanks again pipe clay
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25th April 2011, 01:49 PM #6Hercus 260
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The procedure is detailed in the front of The Text book of Turning.
Correct mounting is essential to accurate work.
G
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25th April 2011, 02:09 PM #7GOLD MEMBER
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hi finnowa. i have read that book.thats what lead me down the bolt down path to start with. after thinking about it for a while i thought id ask here what others had done with there lathes,
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25th April 2011, 05:40 PM #8Hercus 260
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I bolted my cabinet (Hercus steel) to the concrete floor, then installed the lathe as per Hercus instuctions using new dubbo washers (plastic washers that go under the feet)
Then used a level on the bed as I tightened the bolts.
Next is to turn a couple of shoulders and check as per the TBOT and adjust if needed.
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25th April 2011, 10:26 PM #9.
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Graeme,
Have you any photos of your installation showing the Dubbo washers and their location. Azz has a 9, Might be a little different to the 260. ( Mine's still free floating 'cause I'm lazy )
BT
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26th April 2011, 12:03 AM #10Hercus 260
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Bob,
You cannot see anything of the washers etc, but for what its worth I will post a pic
Actually you can! That is the Dubbo washer under the foot.
GraemeLast edited by Finnowa; 26th April 2011 at 12:05 AM. Reason: Adding more info
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26th April 2011, 12:15 AM #11Hercus 260
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To bolt or not to bolt
Further to the discussion.
During my search for information I came across early Southbend literature (IIRC)
that quoted the method used to improve accuracy of home lathes used to assist in manufacture during the war.
They recommended bolting to a rigid level structure and detailed a couple of methods
depending on the situation.
One being the bolt down the headstok and leave the tail free to float. This is also in The text book of turning.
G
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26th April 2011, 05:19 PM #12GOLD MEMBER
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26th April 2011, 10:34 PM #13.
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You won't find any junk on Graeme's tray Azz. He uses it for a mirror !
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26th April 2011, 11:44 PM #14GOLD MEMBER
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ya bob i was very impressed. i like the blue colour as well. just shows how many bad habits have crept in to my work methods. even when i clean up my tray there is still a couple of things skulking around that end.
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