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Posted by Don Foreman on April 14, 2008, 2:00 am
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wrote:
>
> I could probably make you a stud for facing the left-hand nut
>which you (presumably) already have -- using the Compact-5/CNC Emco
>Maier lathe. But I will have to trust measuring over wires, because I
>don't have a left hand thread sample to work from.
Threads on import nuts and bolts I've seen bear little resemblance to
any specification, so measuring over wires would be futile unless you
had 3-wire measurements of the shaft on his grinder.
Better to have him send you the nut so you can make a stud to fit --
and then you may as well face the nut for him since you'd already
have the stud in your lathe. <G>
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Posted by Ronald Thompson on April 14, 2008, 6:37 am
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Don Foreman wrote:
> wrote:
>
>
>> I could probably make you a stud for facing the left-hand nut
>> which you (presumably) already have -- using the Compact-5/CNC Emco
>> Maier lathe. But I will have to trust measuring over wires, because I
>> don't have a left hand thread sample to work from.
>
> Threads on import nuts and bolts I've seen bear little resemblance to
> any specification, so measuring over wires would be futile unless you
> had 3-wire measurements of the shaft on his grinder.
>
> Better to have him send you the nut so you can make a stud to fit --
> and then you may as well face the nut for him since you'd already
> have the stud in your lathe. <G>
If the nut is drilled off center, will facing it do much good? It may
make the wheel straighter, but the nut will still be off center.
The first thing I would do is run the grinder without wheels and see if
it is smooth. If not, junk it unless you want to tear it apart. Next,
check the shafts for trueness with a dial indicator.
Then I'd add pieces one at a time to see what is vibrating.
--
Ron Thompson
Riding my '07 XL883C Sportster
On the Beautiful Florida Space Coast,
right beside the Kennedy Space Center,
USA
http://www.plansandprojects.com
My hobby pages are here:
http://www.plansandprojects.com/My%20Machines/
Visit the castinghobby FAQ:
http://castinghobbywiki.plansandprojects.com/
The member map is here:
http://www.frappr.com/castinghobby
This ain't football, you can't just sit in a computer chair and memorize
facts.
-Ron Thompson
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Posted by Joseph Gwinn on April 14, 2008, 9:07 am
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> Don Foreman wrote:
> > wrote:
> >
> >
> >> I could probably make you a stud for facing the left-hand nut
> >> which you (presumably) already have -- using the Compact-5/CNC Emco
> >> Maier lathe. But I will have to trust measuring over wires, because I
> >> don't have a left hand thread sample to work from.
> >
> > Threads on import nuts and bolts I've seen bear little resemblance to
> > any specification, so measuring over wires would be futile unless you
> > had 3-wire measurements of the shaft on his grinder.
> >
> > Better to have him send you the nut so you can make a stud to fit --
> > and then you may as well face the nut for him since you'd already
> > have the stud in your lathe. <G>
>
> If the nut is drilled off center, will facing it do much good? It may
> make the wheel straighter, but the nut will still be off center.
Compared to the wheel, the mass of the nut is trivial, and so some
eccentricity is harmless in the nut. The issue is the degree of
parallelism between thread axis and the hex flats, as it's to the flats
that one clamps.
It appears that the thread was tapped at an angle to the body of the nut.
> The first thing I would do is run the grinder without wheels and see if
> it is smooth. If not, junk it unless you want to tear it apart. Next,
> check the shafts for trueness with a dial indicator.
> Then I'd add pieces one at a time to see what is vibrating.
The grinder runs smoothly without wheels. The shaft runs true according
to the dial indicator.
Joe Gwinn
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Posted by Ronald Thompson on April 14, 2008, 9:33 am
Please log in for more thread options Joseph Gwinn wrote:
>
>> Don Foreman wrote:
>>> wrote:
>>>
>>>
>>>> I could probably make you a stud for facing the left-hand nut
>>>> which you (presumably) already have -- using the Compact-5/CNC Emco
>>>> Maier lathe. But I will have to trust measuring over wires, because I
>>>> don't have a left hand thread sample to work from.
>>> Threads on import nuts and bolts I've seen bear little resemblance to
>>> any specification, so measuring over wires would be futile unless you
>>> had 3-wire measurements of the shaft on his grinder.
>>>
>>> Better to have him send you the nut so you can make a stud to fit --
>>> and then you may as well face the nut for him since you'd already
>>> have the stud in your lathe. <G>
>> If the nut is drilled off center, will facing it do much good? It may
>> make the wheel straighter, but the nut will still be off center.
>
> Compared to the wheel, the mass of the nut is trivial, and so some
> eccentricity is harmless in the nut. The issue is the degree of
> parallelism between thread axis and the hex flats, as it's to the flats
> that one clamps.
>
> It appears that the thread was tapped at an angle to the body of the nut.
>
>
>> The first thing I would do is run the grinder without wheels and see if
>> it is smooth. If not, junk it unless you want to tear it apart. Next,
>> check the shafts for trueness with a dial indicator.
>> Then I'd add pieces one at a time to see what is vibrating.
>
> The grinder runs smoothly without wheels. The shaft runs true according
> to the dial indicator.
>
> Joe Gwinn
It sounds like you know what you are doing and are on the right track.
If you decide to use a grinder on the nuts while spinning on the arbor,
You might have luck holding them with Loctite or something like it.
--
Ron Thompson
Riding my '07 XL883C Sportster
On the Beautiful Florida Space Coast,
right beside the Kennedy Space Center,
USA
http://www.plansandprojects.com
My hobby pages are here:
http://www.plansandprojects.com/My%20Machines/
Visit the castinghobby FAQ:
http://castinghobbywiki.plansandprojects.com/
The member map is here:
http://www.frappr.com/castinghobby
This ain't football, you can't just sit in a computer chair and memorize
facts.
-Ron Thompson
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Posted by Spehro Pefhany on April 14, 2008, 9:16 am
Please log in for more thread options On Mon, 14 Apr 2008 06:37:19 -0400, Ronald Thompson
>Don Foreman wrote:
>> wrote:
>>
>>
>>> I could probably make you a stud for facing the left-hand nut
>>> which you (presumably) already have -- using the Compact-5/CNC Emco
>>> Maier lathe. But I will have to trust measuring over wires, because I
>>> don't have a left hand thread sample to work from.
>>
>> Threads on import nuts and bolts I've seen bear little resemblance to
>> any specification, so measuring over wires would be futile unless you
>> had 3-wire measurements of the shaft on his grinder.
>>
>> Better to have him send you the nut so you can make a stud to fit --
>> and then you may as well face the nut for him since you'd already
>> have the stud in your lathe. <G>
>If the nut is drilled off center, will facing it do much good? It may
>make the wheel straighter, but the nut will still be off center.
>
>The first thing I would do is run the grinder without wheels and see if
>it is smooth. If not, junk it unless you want to tear it apart. Next,
>check the shafts for trueness with a dial indicator.
>Then I'd add pieces one at a time to see what is vibrating.
I'd be suspicious that it was dropped and the shaft bent.
Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
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> I could probably make you a stud for facing the left-hand nut
>which you (presumably) already have -- using the Compact-5/CNC Emco
>Maier lathe. But I will have to trust measuring over wires, because I
>don't have a left hand thread sample to work from.