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Re: Way Wear, Hard Gibs

 

G'day Marty,John, Gianni et al.
To extrapolate what Marty is saying suggests a lathe should never
wear out. Unfortunately that is not the case.
The contaminants have to be factored into the discussion. Small swarf
and dust particles will act as abrasives and will selectively attach
the softer material; in Gianni's proposal the cast iron bed.
Journal type bearings have a hard metal shaft running in a soft
bearng shell. The soft metal, Babbit, has the capacity to envelop the
abrasive particles without their abrading the shaft. To use Mary's
analogy the big end bearings, etc have a babbit coated shell. Older
lathes have white metal bearings in the headstock, even some recent
precision lathes.
The world's biggest bearings operate on this principle.
To extrapolate my argument we would be better off using brass gibs
with a babbit coating. (Some Old Timer may recall just such an
application.) Come to think of it, I recall that steam loco cross
head slippers are white metalled (coated with babbit).
Not having any bronze I have made some brass bearing bushes which I
have tinned (97% tin solder), these seem to work well.

For me I would find something better to do with HSS than make gibs
out of it.

One good turn deserves another.
Regards to all,
Ian


--- In 7x12minilathe@..., "born4something" <ajs@...>
wrote:

Yep, you may well be correct - it may be a non-issue. Then again,
without a pretty good reason, I personally wouldn't do it just to
find out.


John



--- In 7x12minilathe@..., "Marty N" <martyn@> wrote:

Gianni wrote:

My idea is to replace the saddle gibs with a pair of HSSco flats
I
brought in a surplus shop

John replies:

Flat for those strips is good. I'm not so sure about hard. That
will ensure the eventual wear will be born by the ways rather than
the gib strips. I know which I'd rather maintain or replace. :-)

Marcello replies:

I would not use HSS cobalt flats to make saddle gibs: I fear that
would mean all the wear will be on the saddle.

Marty replies:

Hang out for awhile. This starts like it's going nowhere in
particular.

You have a motor with 100,000 miles on it and the rings go south.
You pull the head and measure the cylinder ridge and find you
have .005" wear. By extrapolation we could say that .0005" happens
every 10,000 miles.

So here are the questions. Why do we think that tool steel, flat,
smooth gibs will accelerate wear of the iron bed? Even if it did
and
did so at the same rate per distance traveled, how long would you
have to run a lathe to produce 42 million passes over the bed of at
least 3.5" distance per pass?

IF your thinking that there is no correlation between the
examples
list...you may be right...the lathe has 60 fold greater viscosity,
runs 530 degrees cooler and does so at something less than 2% of
the
unit loading. Edge goes to the lathe.

[Non-text portions of this message have been removed]


Re: HF Lathes

 

All the ones currently being sold in the US are made by the same
place, SEIG. The listing on mini-lathe.com should help you decide
which vendor gives you the best value.

Roy

--- In 7x12minilathe@..., "film2paper" <film2paper@...>
wrote:

--- In 7x12minilathe@..., Druid Noibn <druid_noibn@>
wrote:

Hi,

All of the lathes here are "imported" machines. The only thing
HF sells that isn't imported is time. You can find a nice used
Made
in America machine on eBay or local auctions, but it might take a
bit
of time and many are true "labors of love" - in the best sense of
the
phrase.

OK what size lathe or work do you plan on doing? Many are here
to
help!

Take care,
DBN



film2paper <film2paper@> wrote:
Hello all, I have a shop but not a lathe. Is the Harbor
Freight lathes
really ok for light duty beginning work like brass knobs and
slotting
some brass etc.? My work arounds are driving me nuts and it's
time
to
get a lathe. I have some huge heavy duty woodworking machines,
case
iron, and I am reluctant to get any of the import machines.






---------------------------------
8:00? 8:25? 8:40? Find a flick in no time
with theYahoo! Search movie showtime shortcut.

[Non-text portions of this message have been removed]
I plan to make some knurled knobs, an inch or less in dia. and some
lens mounting flanges not more than three inches. A 7x12 would be
large enough to cover what I plan to do. Which brand is better or
are
they all made in the same manufacturing plants. I live a hundred
miles from Grizzly Imports too, but only a couple of miles from a
harbor freight store.


Re: Drilling HSS 10% cobalt blank

 

It'd be kind of borderline. The drills are rated for up to Rc65;
cobalt tooling is around Rc67. They're also extremely easy to chip;
if you don't have a pretty rigid setup they'll self destruct.

Roy

--- In 7x12minilathe@..., "jumbo75007" <fullerdj@...>
wrote:

Gianni,
Why don't you use a spade drill bit or a 2 flute drill that is ment
for hard metals?



If that does not come thru use

and go to page 22 of the main catalog.

You are looking for a 2 flute drill. I have never used the spade
bit
or 2 flute drill, but that is what they are for.
I am sure that there are suppliers where you live.

Dan Fuller
Carrollton, Texas



--- In 7x12minilathe@..., <gianni.carbone@> wrote:

Hi folks



Does anybody know how to drill holes in a HSS 10% cobalt blanks?



Gianni




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Re: Carbide Insert Nomenclature?

 

Carbide Depot's site has a pretty good section on decoding the insert
nomenclature. They frequently have some good deals on "surplus"
tooling. Not affiliated, just a satisfied customer.



Roy

--- In 7x12minilathe@..., "clypeaster55"
<clypeaster55@...> wrote:

I am going to build a ball/radius cutter similar to Bedair's 9X20
design. Gadgetbuilder has one he made on his site as well. In
gathering
the materials, it occured to me that I have no idea what to ask for
or
order when it comes to the carbide insert. Gadgetbuilder uses
a "TNMG"?
insert, which he says needs a 5 degree titl, and Bedair's doesn't
specify. I know I want something that doesn't require an angled
holder,
since I would like to get a few of these to experiment with (making
my
own holders, thread tools, etc.). Keeps things nice and simple (for
me,
that's a good thing!). I would however, like an insert that would
be
good for general use with a variety of metals (CS, 6061, brass, and
the
occaisional SS).

So... my real question is, what do all these "Txxx" designations
mean
and where can I find a simple explanation of the types and
nomenclature? Can you buy the screws they need together with them?
After looking around, I haven't had much luck. Besides, the
only "T"
codes I know about is "TGIF", and I don't think that cuts anything
but
the end of the week! At least it only comes in one size though!

Any advice is MUCH appreciated.


R: R: Re: Drilling HSS 10% cobalt blank

 

I think you're making things needlessly complicated. The existing
slide plates work fine if they're mounted/adjusted with shims rather
than the jackscrews that work well on larger machines.

Roy

--- In 7x12minilathe@..., <gianni.carbone@...> wrote:

Charlie,



thanks for the infos.

My idea is to replace the saddle gibs with a pair of HSSco flats I
brought
in a surplus shop .I think the HSS flats are rigid enough to avoid
bending
under the pressure of the set screws. I think this is the primary
reason
that saddle gibs are difficult to set. The surface of new two gibs
are
really flat and smooth I think this will help the smoothness of
saddle
motion. Naturally I need to make three holes in each gib before
mounting.





_____

Da: 7x12minilathe@...
[mailto:7x12minilathe@...] Per
conto di Charkie Walklin Sr
Inviato: luned¨¬ 5 marzo 2007 21.23
A: 7x12minilathe@...
Oggetto: Re: R: [7x12minilathe] Re: Drilling HSS 10% cobalt blank





steam4ian <fosterscons@ <mailto:fosterscons%40ozemail.com.au>
ozemail.com.au> wrote: --- In 7x12minilathe@
<mailto:7x12minilathe%40yahoogroups.com>
yahoogroups.com, "born4something"
<ajs@>
wrote:
G'day Gianni & John.
Look up the EMBHomebuilders group which is a relative of these
machining groups. Its a moderated group but they can't be too
fussy,
they let me on it!
They may be able to tell you what EMD can do and even demonstrate
it
by cutting your hole/s Gianni.

One goood turn deserves another.
Regards,
Ian

Hi Gianni,

EDM=Electrical Discharge Machining. I'm no expert on it other
than
what I've read.

You might do a Google search for "hiroc" drills. They are a solid
carbide
single flute drill that will drill tool steel up to 65 R/c. If you
choose to
do this make sure it's a solid carbide single flute drill. Just
make sure
that everything is rigid. Chatter is a killer on these drills. Go
slow with
the RPM and give it a good feed. Not only do they drill straight
but they
hold size pretty good. I have used them many times in the past
(retired tool
and die maker) and they work.
Good luck with whatever you do. Let us know.
Cheers
Charlie



_,_._,___






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Re: HF Lathes

film2paper
 

--- In 7x12minilathe@..., Druid Noibn <druid_noibn@...>
wrote:

Hi,

All of the lathes here are "imported" machines. The only thing
HF sells that isn't imported is time. You can find a nice used Made
in America machine on eBay or local auctions, but it might take a bit
of time and many are true "labors of love" - in the best sense of the
phrase.

OK what size lathe or work do you plan on doing? Many are here to
help!

Take care,
DBN



film2paper <film2paper@...> wrote:
Hello all, I have a shop but not a lathe. Is the Harbor
Freight lathes
really ok for light duty beginning work like brass knobs and
slotting
some brass etc.? My work arounds are driving me nuts and it's time
to
get a lathe. I have some huge heavy duty woodworking machines, case
iron, and I am reluctant to get any of the import machines.






---------------------------------
8:00? 8:25? 8:40? Find a flick in no time
with theYahoo! Search movie showtime shortcut.

[Non-text portions of this message have been removed]
I plan to make some knurled knobs, an inch or less in dia. and some
lens mounting flanges not more than three inches. A 7x12 would be
large enough to cover what I plan to do. Which brand is better or are
they all made in the same manufacturing plants. I live a hundred
miles from Grizzly Imports too, but only a couple of miles from a
harbor freight store.


Re: Way Wear, Hard Gibs

 

Hi Marty,

Yep, you may well be correct - it may be a non-issue. Then again,
without a pretty good reason, I personally wouldn't do it just to
find out.

There shouldn't be excessive forces. After all, the only load
bearing on that surface is when the carriage tries to lift - usually
while using a milling adapter with the carriage stationary. Gravity
works the other way. Some have replaced those strips with brass and
not griped of wear.

I just couldn't understand why anyone would go out of their way
(poor pun) to use hardened strips and see it as an improvement
rather than a potential risk.

John



--- In 7x12minilathe@..., "Marty N" <martyn@...> wrote:

Gianni wrote:

My idea is to replace the saddle gibs with a pair of HSSco flats I
brought in a surplus shop

John replies:

Flat for those strips is good. I'm not so sure about hard. That
will ensure the eventual wear will be born by the ways rather than
the gib strips. I know which I'd rather maintain or replace. :-)

Marcello replies:

I would not use HSS cobalt flats to make saddle gibs: I fear that
would mean all the wear will be on the saddle.

Marty replies:

Hang out for awhile. This starts like it's going nowhere in
particular.

You have a motor with 100,000 miles on it and the rings go south.
You pull the head and measure the cylinder ridge and find you
have .005" wear. By extrapolation we could say that .0005" happens
every 10,000 miles.

The motor has a 3.5" stroke and is geared to run 60 mph at about
2100 rpm. To run 10,000 miles at this pace it will take 166.7 hours
or 10,000 minutes in which time the motor will make 21 million
revolutions and visiting the cylinder twice per revolution, once up
and once down per revolution thus makes 42 million passes over that
cylinder wall.

The cylinder wall is gray cast iron, at about 200 Brinel hardness
or about the same as an Asian lathe bed. The piston ring is ductile
iron with a hard chrome face at about 800 Brinel (Rockwell 70 C) or
about 10 Rockwell C units harder than tool steel.

The highest wear is at the point of reversal where velocity is
zero. The top of the cylinder taking the brunt of the force as
pressures are in the range of 750 to 1200 PSI and temperatures at
the contact surface near 600 F. At this temperature an average 30W
oil has an apparent viscosity of about 2.5 centipoises or roughly
2.5 X more viscous than water. Lubrication is in the boundary layer
state, just as it is on a lathe way.

In boundary layer lubrication the surfaces may make asperity
contact IF the finishes of the surfaces stand proud of the films
thickness (too rough) OR if the film thickness or it's strength is
insufficient to support the load asked of the assembly, e.g. lack of
proper viscosity.

ISO 68 Way oil at room temperature is about 60 times more viscous
than motor oil (2.5 cP verses 150 cP) of the same class at the
temperatures about the rings. Both finished with 320 abrasive will
exhibit nearly identical Ra.

So here are the questions. Why do we think that tool steel, flat,
smooth gibs will accelerate wear of the iron bed? Even if it did and
did so at the same rate per distance traveled, how long would you
have to run a lathe to produce 42 million passes over the bed of at
least 3.5" distance per pass?

IF your thinking that there is no correlation between the examples
list...you may be right...the lathe has 60 fold greater viscosity,
runs 530 degrees cooler and does so at something less than 2% of the
unit loading. Edge goes to the lathe.

[Non-text portions of this message have been removed]


Re: Harbor freight 8x12 lathe (cheap digital calipers)

Druid Noibn
 

Hi John,

You raise a good point - I read his feedback comments.

800WATT is sometimes slow on shipment and most now expect rapid delivery unless otherwise notified. My suspicion is that he sells items in anticipation of receiving a shipment and/or places orders after selling. Not on everything, but there is a delivery issue here.

My experience (about 18 months and many items) is 100% success - sometimes it took 4-5 weeks but the goods arrived and were as described. As for communications - well, 800WATT scores a Strong Negative on this point and it is likely the reason for the poor ratings. He also was very reluctant to leave postive scores, i.e., he only responded to negative ones. He seems to have changed his approach of late but it will take a very long time to improve the rankings!

So, I will continue to buy from 800WATT e.g. I just bought 2x 6" digital calipers, but I am aware of his foibles.

Hmmm...maybe he worked for Harbor Freight at one time?

Take care,
DBN



John Swam <johnswam@...> wrote:
be very careful dealing with 800watt, I never got my items and he would never answer my emails . Some people have been able to deal with him but many got stuck. good luck, john

----- Original Message -----
From: born4something
To: 7x12minilathe@...
Sent: 3/6/2007 6:22:16 PM
Subject: [7x12minilathe] Re: Harbor freight 8x12 lathe (cheap digital calipers)

Thanks,

Some of 800WATT's listings look pretty good - except he lists as US
only. :-(

Maybe I'll politely ask.

John

--- In 7x12minilathe@..., Druid Noibn <druid_noibn@...>
wrote:

Hi John,

Just two-more-cents-worth...

One might take a quick look on some of the eBay offerings. For
example, a vendor "800WATT" sells the calipers item at good prices -
watch the s/h charges however. Also, this vendor has a low score
due to his poor communications style and often a bit long on
delivery time. I've purchased several items from him and all worked
out well. I've also purchased a larger caliper from Australia and
it arrived faster than the items from the US vendors.

Take care,
DBN


born4something <ajs@...> wrote:


Hi,

I see lots of interest in cheap digital calipers - presumeably for
DRO
mods. Not sure if this helps but there are some at
ID=TD2081&CATID=&keywords=TD208&#92;
1&SPECIAL=&form=KEYWORD&ProdCodeOnly=&Keyword1=&Keyword2=&pageNumber=
&pr&#92;
iceMin=&priceMax=&SUBCATID=
<
ID=TD2081&CATID=&keywords=TD20&#92;
81&SPECIAL=&form=KEYWORD&ProdCodeOnly=&Keyword1=&Keyword2=&pageNumber
=&p&#92;
riceMin=&priceMax=&SUBCATID=> that may be of interest.

Ignore the listed price. I can buy these at Qty 1+ $12.77 Qty 5+
$11.77
Qty 10+ $10.77 (10% GST not inlcluded). The prices are in Aussie
dollars
which sit around the $US0.75 mark. I'd probably wear about $AU12 in
freight to get a delivery to my door.

I haven't physically seen one of these so the catalogue entry is
all I
have. Perhaps a 1-off retail purchase should come first. If someone
wants to buy some I'm happy to act as middle man. If a few people
were
closely located a bulk buy may be attractive. Contact me off list
if
you'd like to explore details.

John
(not associated in any way with the supplier, other than as a trade
customer).

--- In 7x12minilathe@..., "mrslushy" <MrFrost@> wrote:

--- In 7x12minilathe@..., "rancerupp" rupps@ wrote:

Chris,

You're not the only one that missed it. However I am about 2
weeks
away
from ordering. I missed the $16 dig. caliper too.

Rance (sittin & watching the prices)

LMS currently has 6" digital caliper for 14.95.....check it out.







---------------------------------
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with Yahoo! Mail for Mobile. Get started.









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Re: Carbide Insert Nomenclature?

Marty N
 

Excellent link Chuck. On my desktop. Thanks

Marty

----- Original Message -----
From: ckinzer@...
To: 7x12minilathe@...
Sent: Tuesday, March 06, 2007 10:32 AM
Subject: Re: [7x12minilathe] Carbide Insert Nomenclature?


Here's a place with an 83 page document on these things. Describes
shapes, rakes, whether or not a hole is in it, presence of chip
breakers, and probably more than you want to know! Typical catalogs
we might use (Enco, et. al.) will only have a subset of these. And of
that subset, an individual home machinists may only buy a few types,
or even one type.



Chuck K.

Quoting clypeaster55 <clypeaster55@...>:

> I am going to build a ball/radius cutter similar to Bedair's 9X20
> design. Gadgetbuilder has one he made on his site as well. In gathering
> the materials, it occured to me that I have no idea what to ask for or
> order when it comes to the carbide insert. Gadgetbuilder uses a "TNMG"?
> insert, which he says needs a 5 degree titl, and Bedair's doesn't
> specify. I know I want something that doesn't require an angled holder,
> since I would like to get a few of these to experiment with (making my
> own holders, thread tools, etc.). Keeps things nice and simple (for me,
> that's a good thing!). I would however, like an insert that would be
> good for general use with a variety of metals (CS, 6061, brass, and the
> occaisional SS).
>
> So... my real question is, what do all these "Txxx" designations mean
> and where can I find a simple explanation of the types and
> nomenclature? Can you buy the screws they need together with them?
> After looking around, I haven't had much luck. Besides, the only "T"
> codes I know about is "TGIF", and I don't think that cuts anything but
> the end of the week! At least it only comes in one size though!
>
> Any advice is MUCH appreciated.
>
>


Re: Way Wear, Hard Gibs

Marty N
 

Gianni wrote:

My idea is to replace the saddle gibs with a pair of HSSco flats I brought in a surplus shop

John replies:

Flat for those strips is good. I'm not so sure about hard. That will ensure the eventual wear will be born by the ways rather than the gib strips. I know which I'd rather maintain or replace. :-)

Marcello replies:

I would not use HSS cobalt flats to make saddle gibs: I fear that would mean all the wear will be on the saddle.

Marty replies:

Hang out for awhile. This starts like it's going nowhere in particular.

You have a motor with 100,000 miles on it and the rings go south. You pull the head and measure the cylinder ridge and find you have .005" wear. By extrapolation we could say that .0005" happens every 10,000 miles.

The motor has a 3.5" stroke and is geared to run 60 mph at about 2100 rpm. To run 10,000 miles at this pace it will take 166.7 hours or 10,000 minutes in which time the motor will make 21 million revolutions and visiting the cylinder twice per revolution, once up and once down per revolution thus makes 42 million passes over that cylinder wall.

The cylinder wall is gray cast iron, at about 200 Brinel hardness or about the same as an Asian lathe bed. The piston ring is ductile iron with a hard chrome face at about 800 Brinel (Rockwell 70 C) or about 10 Rockwell C units harder than tool steel.

The highest wear is at the point of reversal where velocity is zero. The top of the cylinder taking the brunt of the force as pressures are in the range of 750 to 1200 PSI and temperatures at the contact surface near 600 F. At this temperature an average 30W oil has an apparent viscosity of about 2.5 centipoises or roughly 2.5 X more viscous than water. Lubrication is in the boundary layer state, just as it is on a lathe way.

In boundary layer lubrication the surfaces may make asperity contact IF the finishes of the surfaces stand proud of the films thickness (too rough) OR if the film thickness or it's strength is insufficient to support the load asked of the assembly, e.g. lack of proper viscosity.

ISO 68 Way oil at room temperature is about 60 times more viscous than motor oil (2.5 cP verses 150 cP) of the same class at the temperatures about the rings. Both finished with 320 abrasive will exhibit nearly identical Ra.

So here are the questions. Why do we think that tool steel, flat, smooth gibs will accelerate wear of the iron bed? Even if it did and did so at the same rate per distance traveled, how long would you have to run a lathe to produce 42 million passes over the bed of at least 3.5" distance per pass?

IF your thinking that there is no correlation between the examples list...you may be right...the lathe has 60 fold greater viscosity, runs 530 degrees cooler and does so at something less than 2% of the unit loading. Edge goes to the lathe.


Re: Harbor freight 8x12 lathe (cheap digital calipers)

 

be very careful dealing with 800watt, I never got my items and he would never answer my emails . Some people have been able to deal with him but many got stuck. good luck, john

----- Original Message -----
From: born4something
To: 7x12minilathe@...
Sent: 3/6/2007 6:22:16 PM
Subject: [7x12minilathe] Re: Harbor freight 8x12 lathe (cheap digital calipers)


Thanks,

Some of 800WATT's listings look pretty good - except he lists as US
only. :-(

Maybe I'll politely ask.

John

--- In 7x12minilathe@..., Druid Noibn <druid_noibn@...>
wrote:

Hi John,

Just two-more-cents-worth...

One might take a quick look on some of the eBay offerings. For
example, a vendor "800WATT" sells the calipers item at good prices -
watch the s/h charges however. Also, this vendor has a low score
due to his poor communications style and often a bit long on
delivery time. I've purchased several items from him and all worked
out well. I've also purchased a larger caliper from Australia and
it arrived faster than the items from the US vendors.

Take care,
DBN


born4something <ajs@...> wrote:


Hi,

I see lots of interest in cheap digital calipers - presumeably for
DRO
mods. Not sure if this helps but there are some at
ID=TD2081&CATID=&keywords=TD208&#92;
1&SPECIAL=&form=KEYWORD&ProdCodeOnly=&Keyword1=&Keyword2=&pageNumber=
&pr&#92;
iceMin=&priceMax=&SUBCATID=
<
ID=TD2081&CATID=&keywords=TD20&#92;
81&SPECIAL=&form=KEYWORD&ProdCodeOnly=&Keyword1=&Keyword2=&pageNumber
=&p&#92;
riceMin=&priceMax=&SUBCATID=> that may be of interest.

Ignore the listed price. I can buy these at Qty 1+ $12.77 Qty 5+
$11.77
Qty 10+ $10.77 (10% GST not inlcluded). The prices are in Aussie
dollars
which sit around the $US0.75 mark. I'd probably wear about $AU12 in
freight to get a delivery to my door.

I haven't physically seen one of these so the catalogue entry is
all I
have. Perhaps a 1-off retail purchase should come first. If someone
wants to buy some I'm happy to act as middle man. If a few people
were
closely located a bulk buy may be attractive. Contact me off list
if
you'd like to explore details.

John
(not associated in any way with the supplier, other than as a trade
customer).

--- In 7x12minilathe@..., "mrslushy" <MrFrost@> wrote:

--- In 7x12minilathe@..., "rancerupp" rupps@ wrote:

Chris,

You're not the only one that missed it. However I am about 2
weeks
away
from ordering. I missed the $16 dig. caliper too.

Rance (sittin & watching the prices)

LMS currently has 6" digital caliper for 14.95.....check it out.







---------------------------------
No need to miss a message. Get email on-the-go
with Yahoo! Mail for Mobile. Get started.



Re: Harbor freight 8x12 lathe (cheap digital calipers)

 

Thanks,

Some of 800WATT's listings look pretty good - except he lists as US
only. :-(

Maybe I'll politely ask.

John


--- In 7x12minilathe@..., Druid Noibn <druid_noibn@...>
wrote:

Hi John,

Just two-more-cents-worth...

One might take a quick look on some of the eBay offerings. For
example, a vendor "800WATT" sells the calipers item at good prices -
watch the s/h charges however. Also, this vendor has a low score
due to his poor communications style and often a bit long on
delivery time. I've purchased several items from him and all worked
out well. I've also purchased a larger caliper from Australia and
it arrived faster than the items from the US vendors.

Take care,
DBN


born4something <ajs@...> wrote:


Hi,

I see lots of interest in cheap digital calipers - presumeably for
DRO
mods. Not sure if this helps but there are some at
ID=TD2081&CATID=&keywords=TD208&#92;
1&SPECIAL=&form=KEYWORD&ProdCodeOnly=&Keyword1=&Keyword2=&pageNumber=
&pr&#92;
iceMin=&priceMax=&SUBCATID=
<
ID=TD2081&CATID=&keywords=TD20&#92;
81&SPECIAL=&form=KEYWORD&ProdCodeOnly=&Keyword1=&Keyword2=&pageNumber
=&p&#92;
riceMin=&priceMax=&SUBCATID=> that may be of interest.

Ignore the listed price. I can buy these at Qty 1+ $12.77 Qty 5+
$11.77
Qty 10+ $10.77 (10% GST not inlcluded). The prices are in Aussie
dollars
which sit around the $US0.75 mark. I'd probably wear about $AU12 in
freight to get a delivery to my door.

I haven't physically seen one of these so the catalogue entry is
all I
have. Perhaps a 1-off retail purchase should come first. If someone
wants to buy some I'm happy to act as middle man. If a few people
were
closely located a bulk buy may be attractive. Contact me off list
if
you'd like to explore details.

John
(not associated in any way with the supplier, other than as a trade
customer).

--- In 7x12minilathe@..., "mrslushy" <MrFrost@> wrote:

--- In 7x12minilathe@..., "rancerupp" rupps@ wrote:

Chris,

You're not the only one that missed it. However I am about 2
weeks
away
from ordering. I missed the $16 dig. caliper too.

Rance (sittin & watching the prices)

LMS currently has 6" digital caliper for 14.95.....check it out.
[Non-text portions of this message have been removed]






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[Non-text portions of this message have been removed]


Re: Carbide Insert Nomenclature?

 

Deary me,

TGIF comes in many sizes. Sometimes the weekend can be HUGE. You
must lead a very sedentary life! <G>

When it comes to carbide inserts, the letters follow a code. I'm
sure it's detailed in Machinery's Handbook. I'll hunt it out and
send you an extract direct. I know the first letter gives the basic
shape - T is triangular. What's that say about the weekend?

Don't know where to get those wee little screws - or matching taps.

John



--- In 7x12minilathe@..., "clypeaster55"
<clypeaster55@...> wrote:

I am going to build a ball/radius cutter similar to Bedair's 9X20
design. Gadgetbuilder has one he made on his site as well. In
gathering
the materials, it occured to me that I have no idea what to ask
for or
order when it comes to the carbide insert. Gadgetbuilder uses
a "TNMG"?
insert, which he says needs a 5 degree titl, and Bedair's doesn't
specify. I know I want something that doesn't require an angled
holder,
since I would like to get a few of these to experiment with
(making my
own holders, thread tools, etc.). Keeps things nice and simple
(for me,
that's a good thing!). I would however, like an insert that would
be
good for general use with a variety of metals (CS, 6061, brass,
and the
occaisional SS).

So... my real question is, what do all these "Txxx" designations
mean
and where can I find a simple explanation of the types and
nomenclature? Can you buy the screws they need together with them?
After looking around, I haven't had much luck. Besides, the
only "T"
codes I know about is "TGIF", and I don't think that cuts anything
but
the end of the week! At least it only comes in one size though!

Any advice is MUCH appreciated.


Taig/Peatol Lathe Wanted

 

Hi, I'm seeking a secondhand Taig/Peatol Lathe. It must be in vgc. I'm
in England. Please contact me if you have anything available. Thanks.
Best Regards,
Brian.


Re: Drilling HSS 10% cobalt blank

jumbo75007
 

Gianni,
Why don't you use a spade drill bit or a 2 flute drill that is ment
for hard metals?



If that does not come thru use

and go to page 22 of the main catalog.

You are looking for a 2 flute drill. I have never used the spade bit
or 2 flute drill, but that is what they are for.
I am sure that there are suppliers where you live.

Dan Fuller
Carrollton, Texas



--- In 7x12minilathe@..., <gianni.carbone@...> wrote:

Hi folks



Does anybody know how to drill holes in a HSS 10% cobalt blanks?



Gianni




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Re: Carbide Insert Nomenclature?

 

Here's a place with an 83 page document on these things. Describes
shapes, rakes, whether or not a hole is in it, presence of chip
breakers, and probably more than you want to know! Typical catalogs
we might use (Enco, et. al.) will only have a subset of these. And of
that subset, an individual home machinists may only buy a few types,
or even one type.



Chuck K.

Quoting clypeaster55 <clypeaster55@...>:

I am going to build a ball/radius cutter similar to Bedair's 9X20
design. Gadgetbuilder has one he made on his site as well. In gathering
the materials, it occured to me that I have no idea what to ask for or
order when it comes to the carbide insert. Gadgetbuilder uses a "TNMG"?
insert, which he says needs a 5 degree titl, and Bedair's doesn't
specify. I know I want something that doesn't require an angled holder,
since I would like to get a few of these to experiment with (making my
own holders, thread tools, etc.). Keeps things nice and simple (for me,
that's a good thing!). I would however, like an insert that would be
good for general use with a variety of metals (CS, 6061, brass, and the
occaisional SS).

So... my real question is, what do all these "Txxx" designations mean
and where can I find a simple explanation of the types and
nomenclature? Can you buy the screws they need together with them?
After looking around, I haven't had much luck. Besides, the only "T"
codes I know about is "TGIF", and I don't think that cuts anything but
the end of the week! At least it only comes in one size though!

Any advice is MUCH appreciated.


Carbide Insert Nomenclature?

 

I am going to build a ball/radius cutter similar to Bedair's 9X20
design. Gadgetbuilder has one he made on his site as well. In gathering
the materials, it occured to me that I have no idea what to ask for or
order when it comes to the carbide insert. Gadgetbuilder uses a "TNMG"?
insert, which he says needs a 5 degree titl, and Bedair's doesn't
specify. I know I want something that doesn't require an angled holder,
since I would like to get a few of these to experiment with (making my
own holders, thread tools, etc.). Keeps things nice and simple (for me,
that's a good thing!). I would however, like an insert that would be
good for general use with a variety of metals (CS, 6061, brass, and the
occaisional SS).

So... my real question is, what do all these "Txxx" designations mean
and where can I find a simple explanation of the types and
nomenclature? Can you buy the screws they need together with them?
After looking around, I haven't had much luck. Besides, the only "T"
codes I know about is "TGIF", and I don't think that cuts anything but
the end of the week! At least it only comes in one size though!

Any advice is MUCH appreciated.


Re: Harbor freight 8x12 lathe (cheap digital calipers)

Druid Noibn
 

Hi John,

Just two-more-cents-worth...

One might take a quick look on some of the eBay offerings. For example, a vendor "800WATT" sells the calipers item at good prices - watch the s/h charges however. Also, this vendor has a low score due to his poor communications style and often a bit long on delivery time. I've purchased several items from him and all worked out well. I've also purchased a larger caliper from Australia and it arrived faster than the items from the US vendors.

Take care,
DBN


born4something <ajs@...> wrote:


Hi,

I see lots of interest in cheap digital calipers - presumeably for DRO
mods. Not sure if this helps but there are some at
;
1&SPECIAL=&form=KEYWORD&ProdCodeOnly=&Keyword1=&Keyword2=&pageNumber=&pr&#92;
iceMin=&priceMax=&SUBCATID=
<;
81&SPECIAL=&form=KEYWORD&ProdCodeOnly=&Keyword1=&Keyword2=&pageNumber=&p&#92;
riceMin=&priceMax=&SUBCATID=> that may be of interest.

Ignore the listed price. I can buy these at Qty 1+ $12.77 Qty 5+ $11.77
Qty 10+ $10.77 (10% GST not inlcluded). The prices are in Aussie dollars
which sit around the $US0.75 mark. I'd probably wear about $AU12 in
freight to get a delivery to my door.

I haven't physically seen one of these so the catalogue entry is all I
have. Perhaps a 1-off retail purchase should come first. If someone
wants to buy some I'm happy to act as middle man. If a few people were
closely located a bulk buy may be attractive. Contact me off list if
you'd like to explore details.

John
(not associated in any way with the supplier, other than as a trade
customer).

--- In 7x12minilathe@..., "mrslushy" <MrFrost@...> wrote:

--- In 7x12minilathe@..., "rancerupp" rupps@ wrote:

Chris,

You're not the only one that missed it. However I am about 2 weeks
away
from ordering. I missed the $16 dig. caliper too.

Rance (sittin & watching the prices)

LMS currently has 6" digital caliper for 14.95.....check it out.







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Re: HF Lathes

Druid Noibn
 

Hi,

All of the lathes here are "imported" machines. The only thing HF sells that isn't imported is time. You can find a nice used Made in America machine on eBay or local auctions, but it might take a bit of time and many are true "labors of love" - in the best sense of the phrase.

OK what size lathe or work do you plan on doing? Many are here to help!

Take care,
DBN



film2paper <film2paper@...> wrote:
Hello all, I have a shop but not a lathe. Is the Harbor Freight lathes
really ok for light duty beginning work like brass knobs and slotting
some brass etc.? My work arounds are driving me nuts and it's time to
get a lathe. I have some huge heavy duty woodworking machines, case
iron, and I am reluctant to get any of the import machines.






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Re: Harbor freight 8x12 lathe

Druid Noibn
 

Hi Ed.,

Your experience with HF sounds about right. Suggestion, put the money in a sock and hide it in your drawer fro a few weeks - maybe 6-8 and when the sale hits, go for it. Also, you might wish to add the rests, plate and spare belts to the order - the add-on prices are very good!

CAUTION - TWICE, HF sent me the wrong v-belt - it seems some ne'er-do-well at the company just wishes to complete an order and stuffs anything in the box. I will now go to an alternate vendor for the item.

While the company does have some good and useful items, e.g., the 8x12 is a great deal, they have a miserable but well-earned reputation for lousy service. For example - I received a couple of items back in November - due to poor packing the items were damaged - bent screws. Still waiting for the replacement parts all I get are claims of being "back-ordered..." Ordering other spares or options will take 6-8 weeks but often a heck of a lot longer. Most of the stores are very helpful, but they don't sell parts.

So, I will continue to shop with HF as this work is a hobby - but if it were "business" HF's poor performance would force me to exclude them without question. All this means is that I will have to plan on opening a HF store <smile>.

Take care,
DBN


ednsu <edo@...> wrote:

> Hello all just missed a sale on the 8x12 for 439. Does anyone have a
listing # from an ad with a good price for model#44859. Now they want
539 as of 3-1
I was finally ready to buy Friday (payday) and noticed the price
change - great timing. I called them anyway to see if they'd give me
the old sale price of $439, but the guy on the phone was just an order
taker but he did tell me their current price for it is $499. Also,
it's on Back Order. He said 20 days, but that's what they say when
they don't have an expected date.

Does anyone know of any place else that sells this model (other than
the LatheMaster 8x14) which is priced to high for me ($749+$169s/h)
even with the extra accessories and reportedly better service.
Ed






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