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Nova cast iron legs and thread pitch

I had planned on adding risers under my Nova 3000 (between the bed and the stand) to give extra height, but I've run into a snag. The M12 bolts that come with the leg set simply don't come in long lengths -- I've tried everywhere I can think of. Best I can do is allthread. Two questions:

a) Does anyone know the thread pitch of the M12 bolts that come with the cast iron legs? (Same as the tapped holes in the underside of the headstock). One local place has 1.50 and 1.75 tpmm, but I think these bolts are much coarser.

b) An alternative is to use 1/2" bolts for the other six mounting holes, and skip the threaded ones. This strikes me as a potential problem, since it would mean only two bolts securing the headstock end onto the cast iron leg.

-- Andy Barss

Reply to
Andrew Barss
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I've no idea what "allthread" is, but the parameters for M12 bolts, or any other Metric ISO 724 size for that matter, are readily available on the 'net. FWIW the pitch is 1.75mm, i.e. not 1.75tpmm. See

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for example for a comprehensive list.Can you not get metric sized bolts and nuts in the US?

Reply to
Alun Saunders

Allthread is pretty much as the name implies. It is round stock that is completely threaded. Think of a bolt where you cut off the head leaving nothing but thread and you've got the idea. Yep, metric is available in the US.

I added height to my Jet with 4X4s bolted to the bottom of the stand. Works pretty well.

Thanks,

-Kev> > I had planned on adding risers under my Nova 3000 (between the bed and the

Reply to
Kevin

Thanks for the clarification -- the one place in Tucson that carries allthread is a hardware store, and the person I talked to described the thread pitch as threads per millimeter.

-- Andy Barss

Reply to
Andrew Barss

: Allthread is pretty much as the name implies. It is round stock that is : completely threaded. Think of a bolt where you cut off the head leaving : nothing but thread and you've got the idea. : Yep, metric is available in the US.

: I added height to my Jet with 4X4s bolted to the bottom of the stand. Works : pretty well.

That's what I'd do, except I want to be able to move it, so I've got it up on a mobile stand.

If it shimmies and shakes, I'll get rid of the mobile base.

-- Andy

Reply to
Andrew Barss

"Andrew Barss" wrote: (clip) the person I talked to described the thread pitch as threads per millimeter. ^^^^^^^^^^^^ Metric threads are specified as millimeters per thread.

I see no problem with using allthread with two nuts.

Reply to
Leo Lichtman

=========================== If you absolutely CAN'T find the metric bolts you need, you might want to consider tapping the existing holes out for the next size SAE thread size, which will be 9/16 inch.

Ken Moon Webberville, TX

Reply to
Ken Moon

Reply to
vernon

vernon wrote: : You should not raise your lathe very much on threads or threaded feet or you : will become unstable.

The plan is to make a riser block out of plywood -- about 8 pieces of balitic birch ply stacked on top of one another, going between the legs and the lathe. These will be drilled out for holes that will let the bolts pass through. Do you see this as unstable, or were you thinking of my raising the lathe just on threaded rod alone?

-- Andy Barss

Reply to
Andrew Barss

Please don't mind the commercial plug to follow...

A good lathe can be made uncomfortable to use, noisy and unstable by a bad stand.

We are now manufacturing a first-class stand for the Stubby S750 in the US (see

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It is heavy, stable and easily height adjustable. A minor modification would allow the basic design to be adapted to just about any lathe without an integral stand. Is there enough interest in this for us to make a stand for the Nova products available? What about acceptable pricing?

Our current stand is an assembly -- the 'a' frame end legs are welded up and the

4 horizontal members are separate. A less expensive stand can be built by welding the entire stand as a single unit. What about that issue? Either way, though, the stand is fully height adjustable.

Bill

Is there any > You should not raise your lathe very much on threads or threaded feet or you

Reply to
Bill Rubenstein

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