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Subject

Author

Date

Metal engineering models

david.cawkwell@tesco.net

11-14-2008

Re: Metal engineering models

Mike

11-19-2008

Re: Metal engineering models

Andy Parker

11-19-2008

Posted by david.cawkwell@tesco.net on November 14, 2008, 4:22 pm

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Hi Group,

I'm interested in getting started on making metal mechanical devices/
model and the like.
Problem is I have no engineering background. Wouldn't know how to use
a lathe for metal work etc.
Any good books anyone can recommend.

Posted by Mike on November 19, 2008, 10:20 am

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> 5.http://www.viddler.com/explore/mittechtv/videos/1001.flv

Hi Mark,

Thanks for posting such an interesting selection of video links. I
have been working my way through them and in the one above (number 5
on your list) the narrator uses some gauges he calls "angle plates"
which are right angled triangular plates with known fixed angles for
the hypotenuse (he shows 30 degree, 45 degree and a boxed set of
angles up to 30 degree). I have never seen these and I wondered what
they are called in the UK ?

Also, in another sequence he holds a round bar in the vice by using a
v-block but he puts the bar against the fixed jaw and the v-block
against the moving jaw. Surely it makes more sense to put the v-block
against the fixed jaw and the bar against the moving jaw in order to
prevent the moving jaw trying to rotate around the assemblage ?

Cheers,

Mike Davies

Posted by David Littlewood on November 19, 2008, 11:40 am

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In article

>> 5.http://www.viddler.com/explore/mittechtv/videos/1001.flv

>
>Hi Mark,
>
>Thanks for posting such an interesting selection of video links. I
>have been working my way through them and in the one above (number 5
>on your list) the narrator uses some gauges he calls "angle plates"
>which are right angled triangular plates with known fixed angles for
>the hypotenuse (he shows 30 degree, 45 degree and a boxed set of
>angles up to 30 degree). I have never seen these and I wondered what
>they are called in the UK ?
>

IIRC, they are called angle blocks or angle gauges. The current issue of
MEW reviews a set (which does any whole degrees of angle from 0 to 90)
sold by Chester UK. Their website is still under construction and I
could see them, but Chronos have some (for a few pounds more) at

http://www.chronos.ltd.uk/acatalog/Chronos_Catalogue_Squares___Rules___An
gle_Gauges___Parallels___Other_Measuring_Tools_206.html

David
--
David Littlewood

Posted by mark on November 19, 2008, 1:30 pm

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> > 5.http://www.viddler.com/explore/mittechtv/videos/1001.flv

>
> Hi Mark,
>
> Thanks for posting such an interesting selection of video links. =A0I
> have been working my way through them and in the one above (number 5
> on your list) the narrator uses some gauges he calls "angle plates"
> which are right angled triangular plates with known fixed angles for
> the hypotenuse (he shows 30 degree, 45 degree and a boxed set of
> angles up to 30 degree). =A0I have never seen these and I wondered what
> they are called in the UK ?
>
> Also, in another sequence he holds a round bar in the vice by using a
> v-block but he puts the bar against the fixed jaw and the v-block
> against the moving jaw. =A0Surely it makes more sense to put the v-block
> against the fixed jaw and the bar against the moving jaw in order to
> prevent the moving jaw trying to rotate around the assemblage ?
>
> Cheers,
>
> Mike Davies

Davids answered the first ..

bar and v-block ....

he probably does it that way ...and then Wang's the v-block down with
a hammer .,..like you are meant to every time you tighten up anything
in a vice on a milling machine .

the moving jaw on these vices ...rises up a little bit when you
tighten it..........it takes whatever is against the jaw with it.

suppose his reasoning is ...better to hit the hardened v-block then
put dents in the soft round bar .

all the best.markj

Posted by David Littlewood on November 19, 2008, 1:38 pm

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In article

>> > 5.http://www.viddler.com/explore/mittechtv/videos/1001.flv

>>
>>
>> Also, in another sequence he holds a round bar in the vice by using a
>> v-block but he puts the bar against the fixed jaw and the v-block
>> against the moving jaw. Surely it makes more sense to put the v-block
>> against the fixed jaw and the bar against the moving jaw in order to
>> prevent the moving jaw trying to rotate around the assemblage ?
>>

>
>bar and v-block ....
>
>he probably does it that way ...and then Wang's the v-block down with
>a hammer .,..like you are meant to every time you tighten up anything
>in a vice on a milling machine .
>
>the moving jaw on these vices ...rises up a little bit when you
>tighten it..........it takes whatever is against the jaw with it.
>
>suppose his reasoning is ...better to hit the hardened v-block then
>put dents in the soft round bar .
>

I would hope any self-respecting metal mangler has a copper hammer or a
block of lead for tapping down without bruising (and a hide or plastic
one for soft alloy).

David
--
David Littlewood

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