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gibs


 

Hi Dennis,
That lathe from Illinois looks like a beauty! That four jaw chuck
looks a little big for it though, maybe you should send it out here.;-
)
Is that Scott Cortez's lathe up on e-bay there? I thought it was,
but the pictures are pretty fuzzy, and the ones on the Dalton site
are
nice and clear.
I have a gib question here. After I was cleaning up the lathe last
nite, I took the top and cross slide off to see if any of those brass
chips got under anything, and while it was apart, I checked the gibs
just to see if they're flat. They're flat across the part that bears
on
the slides, but the cross slide gib is a little wedge shaped. It'a
only
by about .010, but I'm wondering if that may be why I keep getting
play
in there. The screws are tight, and stay tight, but I get play in
there
after a while. I couldn't say after how long, because I don't use the
lathe everyday. So I thought I'd put the question up here before I go
nuts trying to make the gib totally flat with a file.
Also, I think that where the screws bear on the gib, they're
probably not right in those little indentations they're supposed to
be
in, and the middle indent is a hole.It's not all the way through, but
it's a lot bigger that the point of the screw.
Where the indents are on the cross slide gib, there are two or
three
of them, but I couldn't say if they were there when I got the lathe,
or
if they're from using it with some play in the gib or what.
I posted some pictures of the gibs in my lathe file. The dark
spots
on the longer one are the high spots. I started grinding that flat,
or
smooth, and they agree with the marking blue when I tried it against
a
chunk of granite counter top, which I was assured was pretty durn
flat.
Well, I should be off to the salt mines here. Any thoughts or ideas
will be gladly accepted and greatly appreciated. Except for the ones
that state I've made things worse! ;-)
Dave


Dennis Turk
 

Hi Dave

As to the lathe from Illinois. I am sure glad the dumbly that had
it only had it for a short time. I think it was the extra end play
in the spindle he did not understand that prompted him to sell it.
You could not have turned anything with the play it had. Again this
guy did not even know what to call a lathe chuck. The four jaw he
just called a bigger head for the lathe. I did question him on a
number of things but he could not answer one question. The question
about the change gear I asked he answered by telling me there was a
stack of different size wheels but he did not know their use. Or he
was just playing dumb. Who knows?

Yes that is or was Scotts lathe. He was wonting to sell it to make
room for other equipment so it may be in the hands of a machine
dealer now and not just on consignments. I think the pictures are
ones the dealer took and not the ones Scott sent us.

Yes that big heavy duty 6 1/2 inch four jaw is to big for a Lot 4
Dalton but will work just great on my Lot 6. Sorry Dave"-((((((


OK to your gib question. First the larger hole in the center of the
gib is the one used to keep it in place. The rest of the screws just
put pressure on the gib. It is not uncommon to see a gib that will
rock on the end of the screws and end up with some amount of out of
parallel with use. One other thing is that Dalton set screws look
like the points were hand formed or poorly formed so they are not
exactly on center. So if a gib has indents from these screws and
then you move the position of the screws you may be seeing some new
seating going on and this would account for your gib getting loose
after a little use. I actually prefer a nice radius on the end of
the screws so this does not happen.

Turk




--- In daltonlathes@..., "Dave" <dkirk_4@...> wrote:

Hi Dennis,
That lathe from Illinois looks like a beauty! That four jaw
chuck
looks a little big for it though, maybe you should send it out
here.;-
)
Is that Scott Cortez's lathe up on e-bay there? I thought it
was,
but the pictures are pretty fuzzy, and the ones on the Dalton site
are
nice and clear.
I have a gib question here. After I was cleaning up the lathe
last
nite, I took the top and cross slide off to see if any of those
brass
chips got under anything, and while it was apart, I checked the
gibs
just to see if they're flat. They're flat across the part that
bears
on
the slides, but the cross slide gib is a little wedge shaped. It'a
only
by about .010, but I'm wondering if that may be why I keep getting
play
in there. The screws are tight, and stay tight, but I get play in
there
after a while. I couldn't say after how long, because I don't use
the
lathe everyday. So I thought I'd put the question up here before I
go
nuts trying to make the gib totally flat with a file.
Also, I think that where the screws bear on the gib, they're
probably not right in those little indentations they're supposed
to
be
in, and the middle indent is a hole.It's not all the way through,
but
it's a lot bigger that the point of the screw.
Where the indents are on the cross slide gib, there are two or
three
of them, but I couldn't say if they were there when I got the
lathe,
or
if they're from using it with some play in the gib or what.
I posted some pictures of the gibs in my lathe file. The dark
spots
on the longer one are the high spots. I started grinding that
flat,
or
smooth, and they agree with the marking blue when I tried it
against
a
chunk of granite counter top, which I was assured was pretty durn
flat.
Well, I should be off to the salt mines here. Any thoughts or
ideas
will be gladly accepted and greatly appreciated. Except for the
ones
that state I've made things worse! ;-)
Dave


 

So, I spent the evening making a little bushing out of aluminum. I
made it 7/16 so it will fit in a collet. Then I put it in a collet and
drilled and tapped it so I can put the gib screw in there and re-point
it. I think that by doing this, it's as concentric as I can get it.
I put one of the gib screws in just to see how it would work and the
points are off center. So I guess I'll re-point them, and round them
off a little with a file. Then hope they line up with some of the
indents? I don't know how I'd remake the indents without messing up the
threads for the gib screws. I thought about a center drill, but the #1
is too small and the #2 is too big.
I also thought about running the tap into the gib screw holes and
hoping I can get it to leave a mark, and then drilling it on a drill
press. Would that work, or should the indents be made with the gib in
place?
Hey, it finally stopped raining out here today. The sun came out for
a minute and I can still see spots!
Dave