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rotary table halves secureing

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bricky03/08/2020 19:46:56
440 forum posts
48 photos

My rotary table started to judder when cutting out the recess in a flywheel.The bolt secureing the table to the base had loosend.I want advice regarding the use of a nyloc nut or the use of locktite thread locker please.and would it be advisable to fix the bolt to one end or the other instead of both ends rotating.

Frank

David George 104/08/2020 13:31:49
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1303 forum posts
447 photos

Hi Frank. There is little information on your post no make or model No. Perhaps a picture may help. I would have thought that a dab of thread lock would have been sufficient but more info would help.

David

bricky04/08/2020 17:07:20
440 forum posts
48 photos

Thanks for your reply David.Photographs are not easy for me to add to a post,as putting them into my album from I photo sometimes dosn't work.Anyway the rotary table has been a set of castings part machined with no makers name.It was in two halves and had been well machined,I made and fitted the gear and worm drive and the bolt which is what holds the two sections together.this worked well for several years but has just worked loose.The bolt was free to rotate in the bores top and bottom.I did drill and tap the bolt and nut and fitted a scew to hold them together.I now want to fit either a Nylock nut or a nut with loctite thread locker . Sorry to have been so vague initialy.

David George 105/08/2020 07:29:13
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1303 forum posts
447 photos

Hi Frank. If the rotary table has worked well for several years I would just go down the nylock nut route as it is easy to reverse and no chance of affecting the rotary table by loctite getting in the wrong place.

David

ega05/08/2020 09:22:29
1786 forum posts
152 photos

If you don't fancy Nyloc then GHT showed an elegant design for a mechanically-locked nut in his small rotary table.

bricky05/08/2020 20:02:10
440 forum posts
48 photos

Hi ega,Could you tell me what GHT stands for and where I can find the design.

Frank

ega06/08/2020 00:12:41
1786 forum posts
152 photos

bricky:

Sorry I wasn't clear. GHT refers to the late George H Thomas, a prolific contributor to Model Engineer around the 1970s (I don't know what the "H" stood for). Most if not all of his work can also be found in his Model Engineer's Workshop Manual and in his Workshop Techniques, both excellent reads. His Small Rotary Table is in the first of these.

Looking again at your second post I realize that you may already have installed a locknut but if you will send me your email address via the website personal message facility I will be happy to let you have further details.

ega06/08/2020 11:30:31
1786 forum posts
152 photos

PS The underside of the GHT small rotab showing locknut construction:

dscn1864.jpg

bricky07/08/2020 20:08:36
440 forum posts
48 photos

Thanks for your reply EGA,I have already fitted a Nylock nut and now its on don't want to disturb it .That would have been a neat solution to my problem and I will use that type of lock nut if I have any further problems.Thanks again EGA.

Frank

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