Re: Lightening darkened steel
As a life long mechanic and also a shop owner, I never ever messed with welding or brazing cast iron. If it needed to be done I took it to a pro. Mickey moused work will always fail. If it's basically nothing of importance then fine, braze it. But dont expect such a job to take any stress. Also, if you try brazing it and you mess it up or it breaks and you take it to a pro to properly get repaired, you will get charged extra because now it takes more to clean things up to be able to properly repair it. My life long experiance.
george
On Thursday, January 18, 2024 at 12:20:43 PM PST, mike allen <animal@...> wrote:
??? ??? YA need to use a nickel rod & pre heat but not too
hot & go slow & let cool often is the way I was taught way
way back . I've always bee luck enough to be around some real good
wenders when I have needed CI welded .
animal
On 1/18/24 12:16 PM, Jacques Savard
wrote:
help
if you know casting iron
how can we weld it?
?
I have an old tool, a type of miter saw for wood that is
broken, the parts seem impossible to weld or repair with a screw
Can cast iron be welded?
jack 47 71
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Re: Lightening darkened steel
I use both?
I like brazing over using cast iron rod?
But cast iron rod is closer match.?
Dave?
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Show quoted text
Gordon
12:54pm? ?
Look into brazing. Usually quite successful in bonding cast iron. Surface prep is the key for either welding or brazing.
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Re: Lightening darkened steel
Look into brazing. Usually quite successful in bonding cast iron. Surface prep is the key for either welding or brazing.
Gordon On Jan 18, 2024, at 12:16, Jacques Savard <jacquessavard@...> wrote:
help
if you know casting iron
how can we weld it?
?
I have an old tool, a type of miter saw for wood that is broken, the parts seem impossible to weld or repair with a screw
Can cast iron be welded?
jack 47 71
Gordon Taylor
gptaylor98363@...
Those that say a job?cannot be done should?not interrupt those that?are doing it.?¨D?George?Bernard Shaw
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Re: Lightening darkened steel
??? ??? YA need to use a nickel rod & pre heat but not too
hot & go slow & let cool often is the way I was taught way
way back . I've always bee luck enough to be around some real good
wenders when I have needed CI welded .
animal
On 1/18/24 12:16 PM, Jacques Savard
wrote:
toggle quoted message
Show quoted text
help
if you know casting iron
how can we weld it?
?
I have an old tool, a type of miter saw for wood that is
broken, the parts seem impossible to weld or repair with a screw
Can cast iron be welded?
jack 47 71
|
Re: Lightening darkened steel
help
if you know casting iron
how can we weld it?
?
I have an old tool, a type of miter saw for wood that is broken, the parts seem impossible to weld or repair with a screw
Can cast iron be welded?
jack 47 71
|
Re: is this an original minilathe
Yes, that's fine.? ?The "this" I commented on is the separate spacer, which the 8x's I mentioned do not have.
--
Lone Tree, Colorado? ?USA
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Re: Lightening darkened steel
I have machine a lot of cast iron most a high quality class 45 .
It has dill look just machining.?
The Chinese cast iron has a brighter can not till you why.
Dave?
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Re: $1000 Budget: Which 7 x 14 to buy?
??? ??? well that gives then the extra inch or some .
??? animal
On 1/18/24 2:18 AM, Charles Devore via
groups.io wrote:
toggle quoted message
Show quoted text
In the
70's? I worked at a shop that purchased a new lathe made in
Romania. The Romanian who came out for some warranty repair
said they measured turning length distance from a spindle
faceplate(not chuck) to tailstock..In
a message dated 1/17/2024 8:44:26 PM Pacific Standard Time,
mctaglieri@... writes:
?
Actually, I did that myself on my own lathe. Might as
well get as much capacity as you can on such a small
lathe.
?
Mike Taglieri?
An unscrupulous
marketing person might grind the centers so they sit
less proud in the tapers to generate a more generous
distance between...
?
On Wednesday, January 17th, 2024 at 8:37 AM,
Aaron Woods < awoods550@...>
wrote:
On Wed, Jan 17, 2024 at 04:56 AM, Paul
Fox wrote:Can someone explain how the length
measurement is usually done, and how HF fudges
that measurement to make 8 == 10 ?? ?I'm
convinced that I don't want one -- just trying
to understand.paul
The 7x10" measurement probably came about through
incorrect measurement and / or very poor rounding
up of the metric conversion and has stuck. It is
not just HF, pretty much all of the sellers that
market these in inches use that term for the Sieg
C2 Model 200. Sieg itself lists these lathes with
a swing of 180mm (7.08") and between centers
distance of 200mm (ie Model 200). Properly
converted 200mm = 7.87".
The between centers distance is the length of a
part that can be held on the lathe between
centers. You can find some variation on identical
lathes based on the centers used. For example the
very common 9x20 lathe (aka Grizzly G4000 / Jet
BD920) is listed by different vendors as either a
9x19 or a 9x20 lathe. This difference is based on
whether they supply the lathe with a live or dead
center for the tail stock. A live center is about
1" longer giving lathes that ship with a live
center a slightly shorter 19" between centers.
I suspect as the first of the Chinese mini lathes
to arrive, the person tasked with measuring and
converting to inches, measured the distance
between the spindle and tail stock without centers
in place giving a number closer to 10". When the
Model 300 (300mm aka 11.8") arrived, the person
given the task of measuring was more competent and
measured correctly with centers in place.
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Re: Lightening darkened steel
That¡¯s not necessarily something you want to remove.?
If it¡¯s not rust, it¡¯s likely oil, bluing (which doesn¡¯t have to be blue) or some other rust preventative, some might be the finish left by case hardening, or some combination.?
If it¡¯s rust, use something like Evaporust, but be prepared to treat it with something ?immediately after de-rusting it.
I¡¯d simply clean them with a de-greaser if it¡¯s just gunk accumulation, followed by an oil application.
Basically you don¡¯t want to rush in to produce a shiny finish in case you destroy the protective layer you¡¯re mistaking for rust.
Also if it¡¯s just old and darker but that isn¡¯t affcting the use¡why worry about it?
This is peripheral to lathes I guess, hope it's OK to ask.? Have a couple of items from another lathe that I'm cleaning up and repurposing for my 7x.
I'm guessing you all have seen older bare metal steel tools.? They get darker over time with use if not protected.? I'm guessing some of it is oil, some is dirt and other contaminates, and some is probably a chemical reaction, possibly rust or rust-related.
I know you can brighten most things up by abrasion - sanding/polishing/etc but that removes at least some of the metal.
Are there any chemical treatments that can brighten steel that has darkened over time, or is it a permanent change in the metal?
--? Bruce Johnson
"Wherever you go, there you are." B. Banzai, PhD
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Re: is this an original minilathe
Most lathe use a casting for head stock and bolted to bed.
Most turret lathes and screw machines have the head stock and bed cat together.?
Dave?
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Show quoted text
Craig Hopewell
5:06am? ?
I've not seen this. Looking at Grizzly and Vevor (amazon), they appear to be a single piece headstock in the images.
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Re: Lightening darkened steel
In plating they use acid.??
Dave?
|
Lightening darkened steel
This is peripheral to lathes I guess, hope it's OK to ask.? Have a couple of items from another lathe that I'm cleaning up and repurposing for my 7x.
I'm guessing you all have seen older bare metal steel tools.? They get darker over time with use if not protected.? I'm guessing some of it is oil, some is dirt and other contaminates, and some is probably a chemical reaction, possibly rust or rust-related.
I know you can brighten most things up by abrasion - sanding/polishing/etc but that removes at least some of the metal.
Are there any chemical treatments that can brighten steel that has darkened over time, or is it a permanent change in the metal?
|
Re: $1000 Budget: Which 7 x 14 to buy?
Charles Devore
2:18am? ?
In the 70's I worked at a shop that purchased a new lathe made in Romania. The Romanian who came out for some warranty repair said they measured turning length distance from a spindle faceplate(not chuck) to tailstock..In?
I just purchased my first mini . I read all ads it said? center to center?is? 14"?in detail it said? 13.8"?When I receive the I put centers in lathe it was about 16".?After that I look closer at other brands ads is was mix and at times it hard to find the data on Center to Center.?? It would nice if said Chuck face to center. It was a nice surprise?I gain 2" Dave?
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Re: is this an original minilathe
I've not seen this.? ? ?Looking at Grizzly and Vevor (amazon), they appear to be a single piece headstock in the images.
--
Lone Tree, Colorado? ?USA
|
Re: $1000 Budget: Which 7 x 14 to buy?
In the 70's? I worked at a shop that purchased a new lathe made in Romania. The Romanian who came out for some warranty repair said they measured turning length distance from a spindle faceplate(not chuck) to tailstock..In a message dated 1/17/2024 8:44:26 PM Pacific Standard Time, mctaglieri@... writes:
?
Actually, I did that myself on my own lathe. Might as well get as much capacity as you can on such a small lathe.
?
Mike Taglieri?
An unscrupulous marketing person might grind the centers so they sit less proud in the tapers to generate a more generous distance between...
?
On Wednesday, January 17th, 2024 at 8:37 AM, Aaron Woods < awoods550@...> wrote:
On Wed, Jan 17, 2024 at 04:56 AM, Paul Fox wrote:Can someone explain how the length measurement is usually done, and how HF fudges that measurement to make 8 == 10 ?? ?I'm convinced that I don't want one -- just trying to understand.paul
The 7x10" measurement probably came about through incorrect measurement and / or very poor rounding up of the metric conversion and has stuck. It is not just HF, pretty much all of the sellers that market these in inches use that term for the Sieg C2 Model 200. Sieg itself lists these lathes with a swing of 180mm (7.08") and between centers distance of 200mm (ie Model 200). Properly converted 200mm = 7.87".
The between centers distance is the length of a part that can be held on the lathe between centers. You can find some variation on identical lathes based on the centers used. For example the very common 9x20 lathe (aka Grizzly G4000 / Jet BD920) is listed by different vendors as either a 9x19 or a 9x20 lathe. This difference is based on whether they supply the lathe with a live or dead center for the tail stock. A live center is about 1" longer giving lathes that ship with a live center a slightly shorter 19" between centers.
I suspect as the first of the Chinese mini lathes to arrive, the person tasked with measuring and converting to inches, measured the distance between the spindle and tail stock without centers in place giving a number closer to 10". When the Model 300 (300mm aka 11.8") arrived, the person given the task of measuring was more competent and measured correctly with centers in place.
|
Re: $1000 Budget: Which 7 x 14 to buy?
Actually, I did that myself on my own lathe. Might as well get as much capacity as you can on such a small lathe.
Mike Taglieri?
An unscrupulous marketing person might grind the centers so they sit less proud in the tapers to generate a more generous distance between...
On Wednesday, January 17th, 2024 at 8:37 AM, Aaron Woods < awoods550@...> wrote:
On Wed, Jan 17, 2024 at 04:56 AM, Paul Fox wrote:Can someone explain how the length measurement is usually done, and how HF fudges that measurement to make 8 == 10 ?? ?I'm convinced that I don't want one -- just trying to understand.paul
The 7x10" measurement probably came about through incorrect measurement and / or very poor rounding up of the metric conversion and has stuck. It is not just HF, pretty much all of the sellers that market these in inches use that term for the Sieg C2 Model 200. Sieg itself lists these lathes with a swing of 180mm (7.08") and between centers distance of 200mm (ie Model 200). Properly converted 200mm = 7.87".
The between centers distance is the length of a part that can be held on the lathe between centers. You can find some variation on identical lathes based on the centers used. For example the very common 9x20 lathe (aka Grizzly G4000 / Jet BD920) is listed by different vendors as either a 9x19 or a 9x20 lathe. This difference is based on whether they supply the lathe with a live or dead center for the tail stock. A live center is about 1" longer giving lathes that ship with a live center a slightly shorter 19" between centers.
I suspect as the first of the Chinese mini lathes to arrive, the person tasked with measuring and converting to inches, measured the distance between the spindle and tail stock without centers in place giving a number closer to 10". When the Model 300 (300mm aka 11.8") arrived, the person given the task of measuring was more competent and measured correctly with centers in place.
|
Re: "tuning up" a mini lathe
This one did I replace all Allen set screws with square head set screws on my tool pst. No more digging out chip for the Allen set screws. Makes easy to change tool bits. Dave? 
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Re: is this an original minilathe
I agree Most 8" is a 7" with a ?" add to swing 8". On mind you see the Plate add see photo. I would say the mini lathe is great hobby lathe. The large lathes are great but start needing forklift to move and very hobby friendly.? Dave? 
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Re: is this an original minilathe
Interesting we've added the Craftsman 6x18 (Atlas only please) now to the "mini-lathe" concept.? ?That machine has its on "group.io" group.
And so one might say the 8x should have its own group, because its drive system is quite different from the two 7x systems.? ?An owner of the 8x machine might say, "my mini-lathe belt is slipping, etc", which is unlikely on a 7x lathe.? ?This brings up a comment in this topic by a member suggesting the "mini-lathe" should instead be referenced as "7x" or "8x", not "mini-lathe".? ?I would agree with that statement if the 8x is to be part of the 7x12 group - which is pretty much of the case at this time.
--
Lone Tree, Colorado? ?USA
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Re: is this an original minilathe
Here a little data on the??6x18" Atlas / Craftsman. From http://www.lathes.co.uk/craftsman-6-inch-catalogs/ Dave? 
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davesmith1800
chrisser