|
Posted by dave sanderson on May 7, 2008, 8:23 am
Please log in for more thread options
'noon all,
Ive got to make 8 'corner pieces' (for want of a better description)
they are 1"1/2 316 stainless bar, with the back cut out to cover
a mitre joint in some 304 angle edging.
I managed to part off 1 blank last night before my parting tool
gave up the ghost (cheapo chinese screws have stripped )
I think Il get a carbide insert one from JB to replace it, but then I
still have to remove the 'corner' from the inside of the bar blanks.
Any tips? This is the first stainless machining Ive done.
I plan to use a reasonably sized (1") endmill to plunge a good chunk
away, then 'refine' the corner with a smaller one.
The inside bit doesnt have to look pretty, its inside and underneath,
but Id rather not break any tools (or me) whilst making them.
cheers
Dave
|
|
Posted by Tim Leech on May 7, 2008, 8:55 am
Please log in for more thread options
On Wed, 7 May 2008 05:23:59 -0700 (PDT), dave sanderson
>'noon all,
>Ive got to make 8 'corner pieces' (for want of a better description)
>they are 1"1/2 316 stainless bar, with the back cut out to cover
>a mitre joint in some 304 angle edging.
>I managed to part off 1 blank last night before my parting tool
>gave up the ghost (cheapo chinese screws have stripped )
>I think Il get a carbide insert one from JB to replace it, but then I
>still have to remove the 'corner' from the inside of the bar blanks.
>
>Any tips? This is the first stainless machining Ive done.
>I plan to use a reasonably sized (1") endmill to plunge a good chunk
>away, then 'refine' the corner with a smaller one.
>The inside bit doesnt have to look pretty, its inside and underneath,
>but Id rather not break any tools (or me) whilst making them.
>
>cheers
>
>Dave
Any particular reason why you're using 316? Because it's there?
I've got some scrap 1 1/2" prop shafts in free cutting stainless if
you're nearby (Cheshire) & want to try one.
Main thing is lots of lubricant & keep up a steady feed, don't pause
or it'll work harden.
Tim
|
|
Posted by dave sanderson on May 7, 2008, 12:38 pm
Please log in for more thread options > On Wed, 7 May 2008 05:23:59 -0700 (PDT), dave sanderson
>
>
>
> >'noon all,
> >Ive got to make 8 'corner pieces' (for want of a better description)
> >they are 1"1/2 316 stainless bar, with the back cut out to cover
> >a mitre joint in some 304 angle edging.
> >I managed to part off 1 blank last night before my parting tool
> >gave up the ghost (cheapo chinese screws have stripped )
> >I think Il get a carbide insert one from JB to replace it, but then I
> >still have to remove the 'corner' from the inside of the bar blanks.
>
> >Any tips? This is the first stainless machining Ive done.
> >I plan to use a reasonably sized (1") endmill to plunge a good chunk
> >away, then 'refine' the corner with a smaller one.
> >The inside bit doesnt have to look pretty, its inside and underneath,
> >but Id rather not break any tools (or me) whilst making them.
>
> >cheers
>
> >Dave
>
> Any particular reason why you're using 316? Because it's there?
> I've got some scrap 1 1/2" prop shafts in free cutting stainless if
> you're nearby (Cheshire) & want to try one.
>
> Main thing is lots of lubricant & keep up a steady feed, don't pause
> or it'll work harden.
>
> Tim
Im using 316 because thats what Ive got... As it happens its an offcut
from
the propshaft of my cousin John's new canal boat. (might not be 316
then,
but the only markings on it were the number 316, so I assumed)
It certainly work hardens, I knackered a hacksaw blade before I though
of
using the lathe.... (bit dim sometimes, and parting off that size from
a bar
scares me somewhat)
Id take you up on the free cutting stuff but I over in
leicestereshire, and afaik
Im not due over your way any time soon.
I thought the work hardening bit was the main thing, nice to have it
confirmed :)
Dave
|
|
Posted by Tim Leech on May 7, 2008, 1:58 pm
Please log in for more thread options On Wed, 7 May 2008 09:38:33 -0700 (PDT), dave sanderson
>> On Wed, 7 May 2008 05:23:59 -0700 (PDT), dave sanderson
>>
>> Any particular reason why you're using 316? Because it's there?
>> I've got some scrap 1 1/2" prop shafts in free cutting stainless if
>> you're nearby (Cheshire) & want to try one.
>>
>> Main thing is lots of lubricant & keep up a steady feed, don't pause
>> or it'll work harden.
>>
>> Tim
>
>Im using 316 because thats what Ive got... As it happens its an offcut
>from
>the propshaft of my cousin John's new canal boat. (might not be 316
>then,
>but the only markings on it were the number 316, so I assumed)
Boat prop shafts ought to be 316, but it seems that most of those
'mass produced' for the inland waterways market are made from free
cutting stuff (303?), presume that keeps manufacturing costs down
although it doesn't last as long as 316 in service.
Tim
|
|
Posted by dave sanderson on May 7, 2008, 2:08 pm
Please log in for more thread options > On Wed, 7 May 2008 09:38:33 -0700 (PDT), dave sanderson
>
>
>
> >> On Wed, 7 May 2008 05:23:59 -0700 (PDT), dave sanderson
>
> >> Any particular reason why you're using 316? Because it's there?
> >> I've got some scrap 1 1/2" prop shafts in free cutting stainless if
> >> you're nearby (Cheshire) & want to try one.
>
> >> Main thing is lots of lubricant & keep up a steady feed, don't pause
> >> or it'll work harden.
>
> >> Tim
>
> >Im using 316 because thats what Ive got... As it happens its an offcut
> >from
> >the propshaft of my cousin John's new canal boat. (might not be 316
> >then,
> >but the only markings on it were the number 316, so I assumed)
>
> Boat prop shafts ought to be 316, but it seems that most of those
> 'mass produced' for the inland waterways market are made from free
> cutting stuff (303?), presume that keeps manufacturing costs down
> although it doesn't last as long as 316 in service.
>
> Tim
It'll be 316 then, Johns boat is definitely not build to a price as
such,
he believes in doing it properly :)
Is 303 a lot easier to machine then? If so I might try and find some
locally,
I only need about 18" of it.
Dave
|
|
|
Yahoo! 
Google 
Windows Live 
del.icio.us 
digg 
Netscape 
XML Sitemap
>Ive got to make 8 'corner pieces' (for want of a better description)
>they are 1"1/2 316 stainless bar, with the back cut out to cover
>a mitre joint in some 304 angle edging.
>I managed to part off 1 blank last night before my parting tool
>gave up the ghost (cheapo chinese screws have stripped )
>I think Il get a carbide insert one from JB to replace it, but then I
>still have to remove the 'corner' from the inside of the bar blanks.
>
>Any tips? This is the first stainless machining Ive done.
>I plan to use a reasonably sized (1") endmill to plunge a good chunk
>away, then 'refine' the corner with a smaller one.
>The inside bit doesnt have to look pretty, its inside and underneath,
>but Id rather not break any tools (or me) whilst making them.
>
>cheers
>
>Dave