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Hi Gianni,

That stuff's hard. What diameter and how deep? Any access to EDM
equipment?

John



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

Hi folks



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



Gianni




--
Email.it, the professional e-mail, gratis per te:

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Clicca qui:


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

From: Jim RabidWolf
To: 7x12minilathe@...
Sent: Sunday, March 04, 2007 2:59 PM
Subject: Re: [7x12minilathe] Way Lube, last post

I'm still using mobil 1 on the ways, however I have found an additive that
makes them so slick, the tailstock will not lock in place <G> After a bit
more testing, it may be offered for sale.

Rabid

Lubricity or as some call it "oiliness"! Of all the traits of a lubricant this is one that you rarely see a specification on. Usually from synthetic fluids suppliers but never from mineral oil suppliers. Unlike viscosity which is a function of the fluids internal interplay within itself, internal friction, lubricity defines how the lubricant interplays with the material it is applied to, external friction. From a tactile view point it is hard to distinguish. To quantify lubricity as a separate function, the additive must not interfere with the viscosity of the material it is added to. In other words the fluid, before and after addition, would need to display the same viscosity absolute (centipoises) as measured on something like a Brookfield Cone and Plate test rig, then show a lower sine of angle slip to proof a claim of greater lubricity. Years ago it was found that Wynn's friction proofing, which claimed greater lubricity, was not much more than kerosene which just reduced the viscosity of the base oil it was added too. Yes it provided a lower sine of slip but also reduced film strength significantly and greatly reduced viscosity and nobody at home knew the difference. The same effect could be simulated by going down one or two SAE grades or running the motor hotter by 20 to 30 degrees F.

Another "trick" used by oil suppliers is to play with the molecular weight via catalyst cracking operations or reforming, more or less molecular branching, or selectively placing the distribution curve of the fluid via distillation , thus altering the specific gravity. As the SAE and ISO rating systems are apparent viscosity systems their relationship to the absolute systems hinges on this factor. Apparent viscosity in centistokes (cST) relating to centipoises (cP), that is centistokes X specific gravity = centipoises. Centistokes or Saybolt Seconds are used as industry standards to classify a lubricant and if pumped or dripped the delivery system cares about its apparent nature but the lubricated surfaces proper only cares about the absolute value.

In a more simplistic layout, ways and slides use viscosity to dampen vibration "chatter" and provide dynamic braking to the system, along with mechanical considerations. An additive that provides lubricity at the expense of viscosity may improve the tactile "feel" while reducing the dampened features.

Keep us posted Rabid, I'm very interested in your project!

Marty

Gentlemen,

Thanks for the advice. I made two new holders today as prototypes and
will make another 4 giving me 8 plus the boring holder and cutoff tool.

Given your suggestions, no more often than I cut threads or turn
brass, I think I can use one holder for all of these since their
heights will be consistent.

Jerry

Hi Roy,

That's a rather valid (and perceptive) point. I'd never realised the
compromises necessary in the spiral scroll design concept. The
spiral radius changes between the inner and outer extremes. On
inspection, the jaws are machined with the tightest radius on the
outer of each tooth and enough slop between teeth that they don't
jam at the outer extremity. From a theoretical standpoint it's ugly
as hell with all the load carried on minimal area for largeer
workpieces. From a pragmatic standpoint, how else do you get the
self tracking convenience?

Good news, NO MORE LAPPING needed, just lube!

John



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

You don't want to lap the jaws to the scroll. The scroll is

actually

a helical shape, so you'd find the contact patch with the jaws

moves

as the jaws travel in & out. All you need to do is remove the

burrs

from the ends of the jaw teeth & chamfer all the corners. Some
flavor of abrasive tool in a Dremel/Foredom gets it done in short
order. Since the body is "sort of" cast iron, a little work with
rifflers gets the jaw slots trimmed up to allow free sliding.

Roy

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

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

The body is fileable, the jaws are
hardened & have to be done with an abrasive.

Roy

Hi Roy,

Oh no - not another use for the valve grinding paste! Dare I

suggest

removing any serious burs with a file and then seating the jaws

to

the

scroll with a little lapping? I've only just finished lapping my

gibs

& dovetails (with stellar results). Now you're hinting at

lapping

the

3-jaw. And the 4-jaw could run smoother. When will it all end?

John

--- In 7x12minilathe@..., Chris Eilbeck <chris@...> wrote:

Do you scribe the cross-slide with lines at 26.5 and 29.5 degs for

future

reference?

If you're the screwy kinda type! <Big grin>

John

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.

Yup! One of the 14" ones, wielded as a club.

Roy

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

Now why didn't I spot that? Out of true too. And Roy reckons he can
knock the rough edges off with a file!



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

A chick with three jaws?...now THAT'S scary!!! Best run for the
hills...FAST!...

==============


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

wrote:

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

The body is fileable, the jaws are
hardened & have to be done with an abrasive.

Roy

Hi Roy,

Oh no - not another use for the valve grinding paste! Dare I

suggest

removing any serious burs with a file and then seating the jaws

to the

scroll with a little lapping? I've only just finished lapping

my

gibs

& dovetails (with stellar results). Now you're hinting at

lapping the

3-jaw. And the 4-jaw could run smoother. When will it all end?

John

You don't want to lap the jaws to the scroll. The scroll is actually
a helical shape, so you'd find the contact patch with the jaws moves
as the jaws travel in & out. All you need to do is remove the burrs
from the ends of the jaw teeth & chamfer all the corners. Some
flavor of abrasive tool in a Dremel/Foredom gets it done in short
order. Since the body is "sort of" cast iron, a little work with
rifflers gets the jaw slots trimmed up to allow free sliding.

Roy

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

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

The body is fileable, the jaws are
hardened & have to be done with an abrasive.

Roy

Hi Roy,

Oh no - not another use for the valve grinding paste! Dare I

suggest

removing any serious burs with a file and then seating the jaws to

the

scroll with a little lapping? I've only just finished lapping my

gibs

& dovetails (with stellar results). Now you're hinting at lapping

the

3-jaw. And the 4-jaw could run smoother. When will it all end?

John

Having been satisfied with my lathe for about three years I have just
bought a second one from Homier. They have been out of stock for a very
long time but now have a limited stock. The price I paid was $299.00,
still the same price as nearly three years ago. Thought the group might
like to know. Regards, Ted.

Jerry;

At this time I have 10 tool holders 4 of which I made myself. Yes you can make them on the mill you will need a 60 deg dove tail cutter. You may not want to buy a large dove tail, one 1/2" dia. will most likely do. What I have done is grind one end of the tool for steel and the other end for brass and just flip the cutter end for end. Now I have the cutters that I use for brass in the holders that I made. It dose save some time.

Richard T.
Northern New York USA

I'm still using mobil 1 on the ways, however I have found an additive that
makes them so slick, the tailstock will not lock in place <G> After a bit
more testing, it may be offered for sale.

Rabid

Hi Rance,

If you don't "need" the lathe right away - and wish to save a few $$ you might wish to take a chance and see if the price drops back to the $439.

Also note special offers do come and go and the price for the item is coded by the last four digits, e.g., 1VGA, etc. No, the sales person won't tell you the right number to select <smile>.

Take care,
DBN

rancerupp <rupps@...> wrote:
Thanks Ed, I'll try that when I order (2-3 weeks out).

Rance

--- In 7x12minilathe@..., "Ed Boysun" <boysungran@...>
wrote:

Rance, Since the lathe is a catalog only item, you need to order it

over

the phone or on the web. If you go to the HF website and type in

item #

44859-0HSH, the site will take you to the lathe for $529 and list

the

44859-1VGA (I think). If you click on the "Order from printed

catalog"

link and type in the 44859-0HSH part number, you will get to order

it

for the special price that goes along with the suffix 0HSH I

mentioned.

That is the only way to get that price when ordering from the

website.

You could also probably mention the suffix to the salesman if you

were

ordering via phone.

PS: I just noticed that the suffix is the numeral zero followed by

HSH

and not the letter O. Zero gets you to the lathe for $499 and O says
item not found!

Ed B
--- In 7x12minilathe@..., "rancerupp" <rupps@> wrote:

Ed,

Pardon me but what is 44859-OHSH? :) I'm assuming 44859 is their
product #.

Rance

--- In 7x12minilathe@..., "Ed Boysun" boysungran@
wrote:

44859-OHSH is listed for 499.99. Still not as good as the $439

but

$will

almost pay for the freight over the normal price.

Ed

---------------------------------
Get your own web address.
Have a HUGE year through Yahoo! Small Business.

Hi Rance,

Thanks for the update! As it turns out, I'm heading over to China in a week or so and will look around a bit - more stuff for the "junk box."

Another member posted an offer for an 8-LED item 5-pack for $18.99.

Looks like a few toys to play with.

Take care,
DBN



rancerupp <rupps@...> wrote:
DBN,

One word of caution. If you plan on keeping it in your coat pocket,
it may not last as long. I think the bouncing around loosens up the
battery holder a bit so sometimes you have to tilt it a bit to get to
turn on properly. HOWEVER, mounted to a goose neck on a lathe should
be a GREAT application. I STILL highly recommend it.

Rance

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

Hi Rance,

I was wondering if they were any good - thanks for the info!

Take care,
DBN

rancerupp <rupps@...> wrote:
HF currently has their 9 LED flashlight (93712-1VGA) on

sale for $5.

They are normally $10. I got one weeks ago and wish I had 5 more.

If

you are ordering from HF anyways, get one of these and make a

flexible

mount for your lathe. They are bright and last an extremly

loooooong

time on 3 AAA batteries.

Rance






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Thanks Ed, I'll try that when I order (2-3 weeks out).

Rance

--- In 7x12minilathe@..., "Ed Boysun" <boysungran@...>
wrote:

Rance, Since the lathe is a catalog only item, you need to order it

over

the phone or on the web. If you go to the HF website and type in

item #

44859-0HSH, the site will take you to the lathe for $529 and list

the

44859-1VGA (I think). If you click on the "Order from printed

catalog"

link and type in the 44859-0HSH part number, you will get to order

it

for the special price that goes along with the suffix 0HSH I

mentioned.

That is the only way to get that price when ordering from the

website.

You could also probably mention the suffix to the salesman if you

were

ordering via phone.

PS: I just noticed that the suffix is the numeral zero followed by

HSH

and not the letter O. Zero gets you to the lathe for $499 and O says
item not found!

Ed B
--- In 7x12minilathe@..., "rancerupp" <rupps@> wrote:

Ed,

Pardon me but what is 44859-OHSH? :) I'm assuming 44859 is their
product #.

Rance

--- In 7x12minilathe@..., "Ed Boysun" boysungran@
wrote:

44859-OHSH is listed for 499.99. Still not as good as the $439

but

$will

almost pay for the freight over the normal price.

Ed

Hi Rance,

Point well-taken. While the picture appears to show the data port door on the 47257-5VGA ($15.99) neither the offer nor the "manual" mention it - I agree with you, best to look elsewhere. Additionally, my older eyes appreciate larger digits.

Take care,
DBN

rancerupp <rupps@...> wrote:
DBN,

I saw that one. Its a 47257-1VGA vs. 93940-1VGA. I saw the one you
pointed out. I think I'll hold out for the one w/big digits and a
computer interface as I may convert my lathe to cnc later on down the
road. Thanks anyways. :)

Rance

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

Hi Rance,

I do not know if this will work but try: ITEM 47257-1VGA

Take care,
DBN

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)

--- In 7x12minilathe@..., "Chris" <house582@> 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

---------------------------------
Bored stiff? Loosen up...
Download and play hundreds of games for free on Yahoo! Games.

On Sun, Mar 04, 2007 at 04:10:38AM -0000, Paul Moir wrote:

I use a protractor like this:

Set the card part against the side of the cross slide, and the arm
part against the compound. Part of the card is hidden under the cross
slide but it doesn't matter in the least.
I have one that's got a rivet between the two parts at the pivot, and
I regret the purchase because of it. The type with a screw there that
can be locked is better.

Hope that helps!

Yes, thanks both! I was thinking along the lines of using a round bar, a
dial indicator and a calculator but I guess I might have been making things
a bit more complicated than I really needed to. Unfortunately, my local
Machine Mart was closed this afternoon so I had to just eyeball my 15degs
from the built-in one.

Do you scribe the cross-slide with lines at 26.5 and 29.5 degs for future
reference?

Chris
--
Chris Eilbeck
MARS Flight Crew
UKRA #1108 Level 2 UYB
Tripoli UK Member #9527 LSMR

Rance, Since the lathe is a catalog only item, you need to order it over
the phone or on the web. If you go to the HF website and type in item #
44859-0HSH, the site will take you to the lathe for $529 and list the
44859-1VGA (I think). If you click on the "Order from printed catalog"
link and type in the 44859-0HSH part number, you will get to order it
for the special price that goes along with the suffix 0HSH I mentioned.
That is the only way to get that price when ordering from the website.
You could also probably mention the suffix to the salesman if you were
ordering via phone.

PS: I just noticed that the suffix is the numeral zero followed by HSH
and not the letter O. Zero gets you to the lathe for $499 and O says
item not found!

Ed B

DBN,

One word of caution. If you plan on keeping it in your coat pocket,
it may not last as long. I think the bouncing around loosens up the
battery holder a bit so sometimes you have to tilt it a bit to get to
turn on properly. HOWEVER, mounted to a goose neck on a lathe should
be a GREAT application. I STILL highly recommend it.

Rance

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

Hi Rance,

I was wondering if they were any good - thanks for the info!

Take care,
DBN

rancerupp <rupps@...> wrote:
HF currently has their 9 LED flashlight (93712-1VGA) on

sale for $5.

They are normally $10. I got one weeks ago and wish I had 5 more.

If

you are ordering from HF anyways, get one of these and make a

flexible

mount for your lathe. They are bright and last an extremly

loooooong

time on 3 AAA batteries.

Rance






---------------------------------
Bored stiff? Loosen up...
Download and play hundreds of games for free on Yahoo! Games.

---------------------------------
Check out the all-new Yahoo! Mail beta - Fire up a more powerful

email and get things done faster.

DBN,

I saw that one. Its a 47257-1VGA vs. 93940-1VGA. I saw the one you
pointed out. I think I'll hold out for the one w/big digits and a
computer interface as I may convert my lathe to cnc later on down the
road. Thanks anyways. :)

Rance

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

Hi Rance,

I do not know if this will work but try: ITEM 47257-1VGA

Take care,
DBN

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)

--- In 7x12minilathe@..., "Chris" <house582@> 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