Re: Breaking carbide inserts parting off?
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I did, but didn't get the drawing. Was just the casting, but was also cheap... Like me. :)
Bill in OKC?
William R. Meyers, MSgt, USAF(Ret.)
Aphorisms to live by: Good judgement comes from experience. Experience comes from bad judgement.? SEMPER GUMBY!
Expect in one hand, expectorate in the other. See which one gets full first.
On Friday, April 21, 2023 at 03:46:55 PM CDT, mike allen <animal@...> wrote:
??? ??? Yea , looks like it can be cut down some . These folks
sell the drawings separate so a guy/gal can make their own with
what they have . I don't see why it really has to be made from CI?
but maybe someone else here can school me/us on that matter . the
plans are only $ 6.00 for the tool post or the cross slide . I
thought I had read somewhere at one time that if you bought the
plans & then bought the casting later they would credit you on
the plans when purchasing the casting ?
??? ??? IIRC OKC Bill bought a crossslide kit from a guy that
bought it & never made it .
??? ??? animal
On 4/21/2023 1:29 PM, Andrei wrote:
Looks like that rear parting tool is designed for 12 inch and
bigger lathes. You can probably shave down the casting and alter
the dovetails to make it work on your Sheldon.?
Andrei
Sent: Friday, April 21, 2023 3:31 PM
To: [email protected]
<[email protected]>
Cc: [email protected]
<[email protected]>
Subject: Re: [SouthBendLathe] Breaking carbide inserts
parting off?
?
??? ??? They have a rear mounted parting tool tool post they
also sell .? I should buy the crossslide & just have it
here for when I'm ready to make one . I need to learn
dovetails first .
??? ??? Rear Tool Post
??? ??? animal
On 4/21/2023 12:20 PM, Nick
Andrews wrote:
This is on my 11" Sheldon lathe.? No, haven't tried
snugging the gibs but did lock the saddle.? I guess if I
am taking the time to make something, tweaking the gibs
shouldn't seem like such a chore...
Interesting casting.? Do you then just bolt your tool
post on directly somehow?
On Fri, Apr 21, 2023 at
1:49?PM mike allen < animal@...> wrote:
??? ??? I've seen some of those parting tool supports
that folks make on youtube in the past . Folks seem to
like them ,? but then again its the guy that made it
that says its bitchin . These folks make a longer
crossslide casting that you machine to finish that
allows you to put a tool post behind the work so your
parting tool is mounted upside down , some folks say
this is a huge improvement when parting . This is one
of my projects on my list to make sometime . Are you
locking the saddle & tightening the crossslide
& compound gibs? when parting ?
??? ???
??? ??? animal
On 4/21/2023 11:25 AM, Nick Andrews wrote:
Now I know that for some folks parting off in
the lathe is routine, but for some of us it's a
real PITA.? Or can be.? I've tried using a nice
HSS blade in a holder with lots of oil and
freshly-ground tip and still got it pulling to one
side, and now a 1-inch tall steel blade with
carbide insert for the first time last night.?
Yeah, I broke the insert.? And yes, it was a
cheapo chinese insert.? As delivered, the holder
body was not well made and the bottom of the slot
for the tool was tapered, causing a tilt in the
cutoff blade of about 3 degrees or so.? Imagine
that from an ebay seller!? So I put it in the the
vise and milled the slot more parallel, which
corrected the vertical angle of the cutoff blade,
mostly.? I tried to minimize stick-out but still
got too much chatter.? Part isn't that far out
from the 4-jaw, but a tailstock center might've
helped on chatter.
This is on a piece of 1.5" steel rod I got left
from a construction project, no idea what alloy.?
Maybe I have the wrong speed going and need to
crank it up for carbide cutting.? Heard people say
many home lathes struggle to spin fast enough for
carbide but that seems unlikely.? Haven't tested
higher revs yet, wanted to get your thoughts.
I saw a youtube video this morning? where a guy
made a little foot from a piece of CRS that he
bolted through his tool holder that sits on the
top of the cross slide to keep it from bending
down which seems interesting, but not sure if I
could do that or not on my lathe.??
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Bill in OKC too