Diamond in the rough?

[Dabbler]

I use my lantern/Armstrong/American tool post all the time!

 

[DavidR8]

I use my lantern/Armstrong/American tool post all the time!

For my education, can you give me some examples of when you use it?

 

[Dabbler]

I knew that you were going to ask!!

First I use it a lot with soft materials such as plastic, non-alloy aluminum and grippy stuff like copper and soft brass. That allows me to custom grind a 1/4" tool targeted at the material in question. I also have a special tool for hardwoods that I have made for the Lantern tool holders: it looks like a one sided knife edge. These are possible with a QCTP, but not as easy to accomplish IMHO...

 

[Superburban]

The lantern post holds the Armstrong style tool holders (Circled one in red below), looks like you have several. For the quick change style, you will need other cutting bits. I also like the Armstrong style, as you can use small bits of high speed steel, and custom grind them for your needs. I also found a link to a Tubilcain video that shows them in action.

 

[francist]

Hmmm, looks like a Starrett No. 104 speed indicator hiding way down in that box o’ dust as well! Could be a 107, can’t see the handle clear enough. Speed indicator, old style.

-frank

 

[DavidR8]

The lantern post holds the Armstrong style tool holders (Circled one in red below), looks like you have several. For the quick change style, you will need other cutting bits. I also like the Armstrong style, as you can use small bits of high speed steel, and custom grind them for your needs. I also found a link to a Tubilcain video that shows them in action.

Thanks for this. I'm curious though; why does he feed from the centre of the work?

 

[DavidR8]

Hmmm, looks like a Starrett No. 104 speed indicator hiding way down in that box o’ dust as well! Could be a 107, can’t see the handle clear enough. Speed indicator, old style.

-frank

I was wondering what that was. Thanks for your eagle eye!


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[SLK001]

That allows me to custom grind a 1/4" tool targeted at the material in question.

I do this all the time... and mount them in a QCTP holder. I don't know very many situations that an Armstrong holder can handle that a QCTP holder cannot.

 

[MontanaLon]

Thanks for this. I'm curious though; why does he feed from the centre of the work?

I have wondered this too. When the gear train is turning forward that is the direction it goes. In my experience, pushing into the work takes much more force than pulling out does. Tool life and surface finish are better when working from the center out. It always seemed to me that if pushing in was the way to go they would have added another gear in the cross feed chain to go that way when the reversing gears are set to "forward".

 

[DavidR8]

I have wondered this too. When the gear train is turning forward that is the direction it goes. In my experience, pushing into the work takes much more force than pulling out does. Tool life and surface finish are better when working from the center out. It always seemed to me that if pushing in was the way to go they would have added another gear in the cross feed chain to go that way when the reversing gears are set to "forward".

I think I understand what you’re saying:

In a facing operation, working from the centre out takes advantage of the outward pressure (toward the operator) on the tool bit caused by the direction of rotation.

Or am I misunderstanding?


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