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Re: Tips on machining pulley grooves

 

Another option if you can't shape a cutter.? ?Go to a chain saw shop or dealer and purchase a chain file, they come in various diameters, 3/32 or 1/4" would be good, put them on the tool holder or hand hold them you should be able to get a good finish fast.? ?Their teeth are on a diamond pattern as they are used to cut at an angle for sharpening chains.? ?Just my option.? ?Harbor Freight also has diamond burrs? for dremel tools with 1/8'' shanks that might work also.?

pat
Re: What on earth are these?

 

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A third option would be the "dent balls" used by brass instrument repair folks. They are forced thru a tube to push out dents. They generally don't have the stem that these have, and are frequently barrel shaped.

On 9/19/23 13:25, Charles Kinzer wrote:

I guess these could be either "tooling balls" or the devices for jewelry making.? Some of them look identical in photos.? I suppose one difference might be how accurately they are ground.? Being with a machine tool suggests to me they are more likely to be tooling balls which machinists use.

Charles E. "Chuck" Kinzer

On Tuesday, September 19, 2023 at 10:20:37 AM PDT, Charles Kinzer <ckinzer@...> wrote:


I believe these are what are called "Tooling Balls".? They are typically used in the accurate positioning of work pieces.? The shank goes into a hole and then the surface of the ball is used as a reference.? Of course, actual position must be offset based on the diameter of the ball used.? This is similar to techniques using gauge pins, but the ball shape allows more versatility, such as if dealing with angles.

Charles E. "Chuck" Kinzer

On Tuesday, September 19, 2023 at 10:11:23 AM PDT, Adrian Nicolson via groups.io <adrian_nicolson@...> wrote:


Commonly known as Dapping or Doming Punches...used predominately by the jewellery trades and crafts

Regards,
Adrian

On Tuesday, 19 September 2023, 18:06:20 BST, Andrei <calciu1@...> wrote:


That's exactly?what they are. There is a piece missing, which is the doming block (or blocks, in most cases).?

A full new set at Harbor Freight is less than 40 bucks. I would not pay much for this incomplete set.?
From: [email protected] <[email protected]> on behalf of Peter Brooks <peter@...>
Sent: Tuesday, September 19, 2023 1:01 PM
To: [email protected] <[email protected]>
Subject: [Unimat] What on earth are these?
?
Looks like they could be for beating metal to a dome shape… but I have no idea. They were pictured with a lathe so probably metal-working related.
Re: Tips on machining pulley grooves

 

Building the new pulley out of 2 or 3 pieces seems like it might be a good approach.
?
-Guy-

On 09/16/2023 5:32 PM EDT Julius Henry Marx <sawbona@...> wrote:
?
?
On Sat, Sep 16, 2023 at 06:20 PM, Peter Brooks wrote:

... the U3 probably isn’t quite up to the task.
There's a more than one way to skin a cat, just that sometimes you have to push the envelope a bit more than would otherwise be comfortable.
I was in the exact same spot, did not want to spend absurd money on something I was (reasonably) sure I could make myself but only had my Unimat 3 to work with.

Check thread at ME.

Best,

JHM

Re: What on earth are these?

 

Except not all tooling balls have that shoulder.? Those are sometimes called "shoulder balls".

For example:??


Inline image
Charles E. "Chuck" Kinzer

On Tuesday, September 19, 2023 at 10:56:47 AM PDT, Peter Brooks <peter@...> wrote:


Thanks Carl.


Come to think of I think I’ve seen something similar being used on a television programme we have here in the UK, ‘The Repair Shop’ - people bring old (special to them) things to get restored by some excellent craftspeople. It’s better than it sounds.
Re: What on earth are these?

 

Thanks Carl.


Come to think of I think I’ve seen something similar being used on a television programme we have here in the UK, ‘The Repair Shop’ - people bring old (special to them) things to get restored by some excellent craftspeople. It’s better than it sounds.
Re: What on earth are these?

 

They were with an Emco Compact 5 at a local sale room auction here in the UK, if that is any clue.

(The lathe went for ~?200 + 38% (auction house charges, VAT etc.). I made one cheeky bid in case it went for really silly money but I hadn’t seen it in person, so had no idea if it was metric or imperial, or working or not. ?Someone might have got a bargain methinks).
Re: What on earth are these?

 

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Hello Peter:

They are part of a punching block set:

They are similar to tooling balls, that are used for set up work:

Te-Co Precision Tooling Ball, 1/2 in W 10852

The main difference is the tooling ball shoulder is a known distance from the center of the ball, and the ball is true to the shank. Handy for setting up angled work.

Carl.

On 9/19/2023 1:01 PM, Peter Brooks wrote:

Looks like they could be for beating metal to a dome shape… but I have no idea. They were pictured with a lathe so probably metal-working related.
Re: What on earth are these?

 

Doming Punches or Tooling Balls ?
Re: What on earth are these?

 

I guess these could be either "tooling balls" or the devices for jewelry making.? Some of them look identical in photos.? I suppose one difference might be how accurately they are ground.? Being with a machine tool suggests to me they are more likely to be tooling balls which machinists use.

Charles E. "Chuck" Kinzer

On Tuesday, September 19, 2023 at 10:20:37 AM PDT, Charles Kinzer <ckinzer@...> wrote:


I believe these are what are called "Tooling Balls".? They are typically used in the accurate positioning of work pieces.? The shank goes into a hole and then the surface of the ball is used as a reference.? Of course, actual position must be offset based on the diameter of the ball used.? This is similar to techniques using gauge pins, but the ball shape allows more versatility, such as if dealing with angles.

Charles E. "Chuck" Kinzer

On Tuesday, September 19, 2023 at 10:11:23 AM PDT, Adrian Nicolson via groups.io <adrian_nicolson@...> wrote:


Commonly known as Dapping or Doming Punches...used predominately by the jewellery trades and crafts

Regards,
Adrian

On Tuesday, 19 September 2023, 18:06:20 BST, Andrei <calciu1@...> wrote:


That's exactly?what they are. There is a piece missing, which is the doming block (or blocks, in most cases).?

A full new set at Harbor Freight is less than 40 bucks. I would not pay much for this incomplete set.?

From: [email protected] <[email protected]> on behalf of Peter Brooks <peter@...>
Sent: Tuesday, September 19, 2023 1:01 PM
To: [email protected] <[email protected]>
Subject: [Unimat] What on earth are these?
?
Looks like they could be for beating metal to a dome shape… but I have no idea. They were pictured with a lathe so probably metal-working related.
Re: What on earth are these?

 

Ah!
Re: What on earth are these?

 

I believe these are what are called "Tooling Balls".? They are typically used in the accurate positioning of work pieces.? The shank goes into a hole and then the surface of the ball is used as a reference.? Of course, actual position must be offset based on the diameter of the ball used.? This is similar to techniques using gauge pins, but the ball shape allows more versatility, such as if dealing with angles.

Charles E. "Chuck" Kinzer

On Tuesday, September 19, 2023 at 10:11:23 AM PDT, Adrian Nicolson via groups.io <adrian_nicolson@...> wrote:


Commonly known as Dapping or Doming Punches...used predominately by the jewellery trades and crafts

Regards,
Adrian

On Tuesday, 19 September 2023, 18:06:20 BST, Andrei <calciu1@...> wrote:


That's exactly?what they are. There is a piece missing, which is the doming block (or blocks, in most cases).?

A full new set at Harbor Freight is less than 40 bucks. I would not pay much for this incomplete set.?

From: [email protected] <[email protected]> on behalf of Peter Brooks <peter@...>
Sent: Tuesday, September 19, 2023 1:01 PM
To: [email protected] <[email protected]>
Subject: [Unimat] What on earth are these?
?
Looks like they could be for beating metal to a dome shape… but I have no idea. They were pictured with a lathe so probably metal-working related.
Re: What on earth are these?

 

Ah, thanks. Presumably the doming block(s) would be the inverse, and the sheet metal goes in between?
Re: What on earth are these?

 

Commonly known as Dapping or Doming Punches...used predominately by the jewellery trades and crafts

Regards,
Adrian

On Tuesday, 19 September 2023, 18:06:20 BST, Andrei <calciu1@...> wrote:


That's exactly?what they are. There is a piece missing, which is the doming block (or blocks, in most cases).?

A full new set at Harbor Freight is less than 40 bucks. I would not pay much for this incomplete set.?

From: [email protected] <[email protected]> on behalf of Peter Brooks <peter@...>
Sent: Tuesday, September 19, 2023 1:01 PM
To: [email protected] <[email protected]>
Subject: [Unimat] What on earth are these?
?
Looks like they could be for beating metal to a dome shape… but I have no idea. They were pictured with a lathe so probably metal-working related.
Re: What on earth are these?

Andrei
 

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That's exactly?what they are. There is a piece missing, which is the doming block (or blocks, in most cases).?

A full new set at Harbor Freight is less than 40 bucks. I would not pay much for this incomplete set.?

From: [email protected] <[email protected]> on behalf of Peter Brooks <peter@...>
Sent: Tuesday, September 19, 2023 1:01 PM
To: [email protected] <[email protected]>
Subject: [Unimat] What on earth are these?
?
Looks like they could be for beating metal to a dome shape… but I have no idea. They were pictured with a lathe so probably metal-working related.
What on earth are these?

 

Looks like they could be for beating metal to a dome shape… but I have no idea. They were pictured with a lathe so probably metal-working related.
Re: Off Topic measuring units

 

I may disagree, 0 is the temperature of your perfect whiskey, 100 your perfect tea!

Carlos


On Tue, 19 Sept 2023 at 16:39, Carl <carl.blum@...> wrote:

Hi Gang:

While it is not the basis of the Fahrenheit scale, I like to think of it as a human scale. Below 0? and above 100? are both life threatening.

Carl.

On 9/19/2023 11:11 AM, Ian Adam wrote:

Some very interesting points here, but I should make some observations.

With temperature, Fahrenheit’s scale was based on the coldest temperature that he could achieve using a mixture of salt and ice. He then decided to ‘pin’ an upper value as an average human body temperature which he called 100 (from my school days) or 90, later redefined as 96 (Wikipedia). Why these values? Who knows. Later the scale was redefined against water to the scale that we know now.
Re: Off Topic measuring units

 

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Hi Gang:

While it is not the basis of the Fahrenheit scale, I like to think of it as a human scale. Below 0? and above 100? are both life threatening.

Carl.

On 9/19/2023 11:11 AM, Ian Adam wrote:

Some very interesting points here, but I should make some observations.

With temperature, Fahrenheit’s scale was based on the coldest temperature that he could achieve using a mixture of salt and ice. He then decided to ‘pin’ an upper value as an average human body temperature which he called 100 (from my school days) or 90, later redefined as 96 (Wikipedia). Why these values? Who knows. Later the scale was redefined against water to the scale that we know now.
Re: Opinions Sought (Cross-Posted)

 

Si Carl,ya mande un segundo correo con dos fotos de mi Unimat SLpero ahora mismo las vuelvo a enviar.A mi tambien me gustaria saber Ingles pero no lo se.....Saludos.? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?MANEL

En martes, 19 de septiembre de 2023, 17:06:13 CEST, Carl <carl.blum@...> escribió:


Hello Manuel:

Nice looking machine!

Carl.

Hola manuel: ?Bonita máquina! Carl.

On 9/18/2023 6:06 PM, Manuel Ceuma Reverter via groups.io wrote:
Hola,os mando un par de fotos de mi sl con un anagrama poco visto un saludo para todos vosotros sois gente maravillosa,tengo 75 a?os y en mi vida laboral fui tornero,un saludo.? ? ? ? ? ? ? ? ?MANEL.

IMG_20230904_185520_1.jpg
IMG_20230808_125947_1.jpg

Re: Off Topic measuring units

Ian Adam
 

Some very interesting points here, but I should make some observations.

With temperature, Fahrenheit’s scale was based on the coldest temperature that he could achieve using a mixture of salt and ice. He then decided to ‘pin’ an upper value as an average human body temperature which he called 100 (from my school days) or 90, later redefined as 96 (Wikipedia). Why these values? Who knows. Later the scale was redefined against water to the scale that we know now.

The metric system used a centigrade temperature scale based on Anders Celsius’ work since neither 10 nor 1000 would suit particularly. It was not named Celsius because his temperature scale was upside down! 100 degrees was ice and zero was steam. After Celsius died Carolus Linnaeus suggested inverting the scale and both versions existed ‘in hardware’ for a while until Linnaeus’ version won the day. In !948 it was formally renamed the Celsius scale.

All the temperature scales were highly imperfect because boiling and freezing points of water are irrevocably affected by the ambient pressure. Calibrate your thermometer up a mountain and it will be wrong at sea level.

Some units have a ‘fixed’ reference point below which you cannot go:

Temperature: Absolute zero

Pressure: Perfect vacuum

Mass: Perfect vacuum (I’ll leave you to work out the rest)

But from those reference points the magnitude of the units can be any size that is accepted by convention and usefulness.

What I find particularly interesting is that as our ability to measure has improved, our ability to comprehend and use these improvements has diminished. How many of us use a caesium clock, know how to use Planck’s constant to measure mass or Boltzmann’s constant to measure temperature?

Bring back the thumb I say!
Re: Mensuration, was Re: [Unimat] What is the 'BEST' Unimat ?

 

Yes, the spindle height is greater. But it does use some of the same accessories. I don't recall which ones.

Martin P.

On Tuesday, September 19, 2023 at 02:57:39 AM EDT, Peter Brooks <peter@...> wrote:


Ah, stupid me… It’s a bigger machine so I guess the spindle height will be different…

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