Hi all
For those looking I have a Unimat SL for sale.
I live in Spain so remember this if you want to buy it.
The Unimat has had little use, as you can see from the photos.
I have the original box, a bit tatty as it's very old and the original motor and pulleys.
I converted it to a 12v DC motor with a speed controller, but if you wish you can put the original motor back on.
I have all the original accessories plus a couple of drill chuck, the largest is 10mm.
It also comes with a Uminat 4 jaw chuck with the box, again the box is tatty.
I also made a fixed steady (3D printed), it may be useful.
I'm thinking 500€ plus delivery for all of it.
Any questions please ask.
Thank you
Lez
? ?
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This is correct, very thin oil like WD40 and kerosene are, by far, preferable for Aluminium.
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I had an experienced machinist tell me WD is better than common cutting oil for aluminum.
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Re: New Soba 50mm 4 jaw reversible M12 - how to reverse jaw in correct order?
My experience is that with a decent bit of round bar - IE pretty good circularity - the four jaw holds it more firmly. It feels a bit more rigid when turning. If the circularity is a bit irregular it may not be so firm, and of course the three jaw will hold any bar. Obviously the four jaw is good for square bar, and octagonal if you can find some! I saw a three jaw independent the other day, and I can't see what that would be good for. It would be a right pain to adjust.
?
But from the original post I can't see how a four jaw self centring chuck helps with reducing a bit of 25 mm square bar down to 24 mm square. I see that as a milling job - or get a decent file out. It can be done as an extreme (in Unimat terms) job for the four jaw independent chuck. I could even do it in the three jaw self centring, now that I think about it, but it would not be pretty.
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Re: New Soba 50mm 4 jaw reversible M12 - how to reverse jaw in correct order?
Guys,? I can't see how Robert is going to hold this workpiece in a 4J self centering after he has machined one dimension to 24mm??? Am I missing something here??? Richard H.
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Re: New Soba 50mm 4 jaw reversible M12 - how to reverse jaw in correct order?
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Show quoted text
On Sep 25, 2024, at 3:53?PM, Robert Vine <robert.vine36@...> wrote: ? The problem is that there are limited M12 chucks available for Unimat SL especially, 4 jaw independent type. I've got to take a 25mm square bar of about 40mm long down to 24mm square. I'm sure that the self centre chuck will be ok for this and other similar requirements moving forward.
Best regards
To be a bit pedantic, 3-jaw or 4-jaw chucks are available as either a "self-centering" type or "independent" jaw type.
It's just that it is most common that people have a 3-jaw self-centering and 4-jaw independent (and usually larger than the 3-jaw) for good versatility.? But while this is the most conventional (many larger lathes are routinely sold with a 3-jaw self-centering and a ;arger 4-jaw independent included), the number of jaws is not determinant of the type.
But it is true that 3-jaw independents and 4-jaw self-centering are fairly uncommon.? When somebody buys a 4-jaw self-centering, I always wonder what they are planning to use it for.
There are also 2-jaw and 6-jaw chucks (and maybe others).? However, all that I have ever seen are self-centering.
Charles E. "Chuck" Kinzer
?
On Wednesday, September 25, 2024 at 11:26:40 AM PDT, John Dammeyer < johnd@...> wrote:
Rob, I hope you realize that this is just a 4 jaw version of a 3 jaw chuck.? The advantage of the chuck with separate screws to move each jaw is that it¡¯s possible to hold items off center or more importantly adjust a part previously turned for zero runout.? I¡¯d still look at fixing your old 4 jaw. John ? ? Hi Paul Many thanks and spot on indeed. I've also noted that following you're comments, if the jaw number on the chuck is match up to the same jaw number at the same side so as you can see the numbers placed to be seen together,the jaws fit up well when put in place. What a great chuck this is. ? Here is a notated version of the image: ? On Wed, Sep 25, 2024, 10:11?AM Paul Allen via <jp.paul.allen=[email protected]> wrote: When reversing the jaws, you will put them in using reverse ordering. So the #4 jaw goes into the #1 slot (so first), #3 jaw goes in the #2 slot, #2 jaw goes in the #3 slot, and #1 goes in the #4 slot. The way to tell aside from the stamped numbers on the jaws is by the distance of the scroll teeth on the jaw from the edge of the jaw that is going in first. The first jaw to go in will have the first tooth closest to the face going into the scroll. So in your picture of all 4 jaws facing the scroll teeth up, when putting them into the chuck with the beveled face inwards, the one on the right end will go in first, followed by each jaw in sequence. If you are reversing the jaws then it will go in the opposite order, starting with the one on the left end. I hope that helps. Paul Allen ? On Wed, Sep 25, 2024, 9:19?AM Robert Vine via <robert.vine36=[email protected]> wrote: I was very lucky as my wife treated me to a Soba 4 jaw central reversible chuck to get on with my work as I was having so much trouble filing the jaws of the HBM 50m 4 jaw chuck. The Soba is a really good chuck but the only issue I have is its not clear how to reverse the jaws correctly. Each jaw is marked with a number on one side (see one marked as 1 on one side) and are marked again on the other (the one marked as 1 has 4 on the other side). How do I get these correctly aligned up when adding them in reverse etc? It may be obvious but I can't really get on top of it?
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Re: New Soba 50mm 4 jaw reversible M12 - how to reverse jaw in correct order?
Hi Gang:
2 jaw chucks
are great for special jaws, turned to match the part.
We had a 6
jaw and it was nice for thin wall work pieces, I think it also
have 4 set screw to "Run True".
Carl.
On 9/25/2024 3:45 PM, Charles Kinzer
wrote:
toggle quoted message
Show quoted text
There
are also 2-jaw and 6-jaw chucks (and maybe others).? However,
all that I have ever seen are self-centering.
Charles E. "Chuck" Kinzer
|
Re: New Soba 50mm 4 jaw reversible M12 - how to reverse jaw in correct order?
The problem is that there are limited M12 chucks available for Unimat SL especially, 4 jaw independent type. I've got to take a 25mm square bar of about 40mm long down to 24mm square. I'm sure that the self centre chuck will be ok for this and other similar requirements moving forward.
Best regards
To be a bit pedantic, 3-jaw or 4-jaw chucks are available as either a "self-centering" type or "independent" jaw type.
It's just that it is most common that people have a 3-jaw self-centering and 4-jaw independent (and usually larger than the 3-jaw) for good versatility.? But while this is the most conventional (many larger lathes are routinely sold with a 3-jaw self-centering and a ;arger 4-jaw independent included), the number of jaws is not determinant of the type.
But it is true that 3-jaw independents and 4-jaw self-centering are fairly uncommon.? When somebody buys a 4-jaw self-centering, I always wonder what they are planning to use it for.
There are also 2-jaw and 6-jaw chucks (and maybe others).? However, all that I have ever seen are self-centering.
Charles E. "Chuck" Kinzer
?
On Wednesday, September 25, 2024 at 11:26:40 AM PDT, John Dammeyer < johnd@...> wrote:
Rob, I hope you realize that this is just a 4 jaw version of a 3 jaw chuck.? The advantage of the chuck with separate screws to move each jaw is that it¡¯s possible to hold items off center or more importantly adjust a part previously turned for zero runout.? I¡¯d still look at fixing your old 4 jaw. John ? ? Hi Paul Many thanks and spot on indeed. I've also noted that following you're comments, if the jaw number on the chuck is match up to the same jaw number at the same side so as you can see the numbers placed to be seen together,the jaws fit up well when put in place. What a great chuck this is. ? Here is a notated version of the image: ? On Wed, Sep 25, 2024, 10:11?AM Paul Allen via <jp.paul.allen=[email protected]> wrote: When reversing the jaws, you will put them in using reverse ordering. So the #4 jaw goes into the #1 slot (so first), #3 jaw goes in the #2 slot, #2 jaw goes in the #3 slot, and #1 goes in the #4 slot. The way to tell aside from the stamped numbers on the jaws is by the distance of the scroll teeth on the jaw from the edge of the jaw that is going in first. The first jaw to go in will have the first tooth closest to the face going into the scroll. So in your picture of all 4 jaws facing the scroll teeth up, when putting them into the chuck with the beveled face inwards, the one on the right end will go in first, followed by each jaw in sequence. If you are reversing the jaws then it will go in the opposite order, starting with the one on the left end. I hope that helps. Paul Allen ? On Wed, Sep 25, 2024, 9:19?AM Robert Vine via <robert.vine36=[email protected]> wrote: I was very lucky as my wife treated me to a Soba 4 jaw central reversible chuck to get on with my work as I was having so much trouble filing the jaws of the HBM 50m 4 jaw chuck. The Soba is a really good chuck but the only issue I have is its not clear how to reverse the jaws correctly. Each jaw is marked with a number on one side (see one marked as 1 on one side) and are marked again on the other (the one marked as 1 has 4 on the other side). How do I get these correctly aligned up when adding them in reverse etc? It may be obvious but I can't really get on top of it?
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Re: New Soba 50mm 4 jaw reversible M12 - how to reverse jaw in correct order?
To be a bit pedantic, 3-jaw or 4-jaw chucks are available as either a "self-centering" type or "independent" jaw type.
It's just that it is most common that people have a 3-jaw self-centering and 4-jaw independent (and usually larger than the 3-jaw) for good versatility.? But while this is the most conventional (many larger lathes are routinely sold with a 3-jaw self-centering and a ;arger 4-jaw independent included), the number of jaws is not determinant of the type.
But it is true that 3-jaw independents and 4-jaw self-centering are fairly uncommon.? When somebody buys a 4-jaw self-centering, I always wonder what they are planning to use it for.
There are also 2-jaw and 6-jaw chucks (and maybe others).? However, all that I have ever seen are self-centering.
Charles E. "Chuck" Kinzer
?
On Wednesday, September 25, 2024 at 11:26:40 AM PDT, John Dammeyer <johnd@...> wrote:
Rob, I hope you realize that this is just a 4 jaw version of a 3 jaw chuck.? The advantage of the chuck with separate screws to move each jaw is that it¡¯s possible to hold items off center or more importantly adjust a part previously turned for zero runout.? I¡¯d still look at fixing your old 4 jaw. John ?
From: [email protected] [mailto:[email protected]] On Behalf Of Robert Vine
Sent: September 25, 2024 9:39 AM
To: Paul Allen
Cc: [email protected]
Subject: Re: [Unimat] New Soba 50mm 4 jaw reversible M12 - how to reverse jaw in correct order? ? Hi Paul Many thanks and spot on indeed. I've also noted that following you're comments, if the jaw number on the chuck is match up to the same jaw number at the same side so as you can see the numbers placed to be seen together,the jaws fit up well when put in place. What a great chuck this is. ? Here is a notated version of the image: ? On Wed, Sep 25, 2024, 10:11?AM Paul Allen via <jp.paul.allen=[email protected]> wrote: When reversing the jaws, you will put them in using reverse ordering. So the #4 jaw goes into the #1 slot (so first), #3 jaw goes in the #2 slot, #2 jaw goes in the #3 slot, and #1 goes in the #4 slot. The way to tell aside from the stamped numbers on the jaws is by the distance of the scroll teeth on the jaw from the edge of the jaw that is going in first. The first jaw to go in will have the first tooth closest to the face going into the scroll. So in your picture of all 4 jaws facing the scroll teeth up, when putting them into the chuck with the beveled face inwards, the one on the right end will go in first, followed by each jaw in sequence. If you are reversing the jaws then it will go in the opposite order, starting with the one on the left end. I hope that helps. Paul Allen ? On Wed, Sep 25, 2024, 9:19?AM Robert Vine via <robert.vine36=[email protected]> wrote: I was very lucky as my wife treated me to a Soba 4 jaw central reversible chuck to get on with my work as I was having so much trouble filing the jaws of the HBM 50m 4 jaw chuck. The Soba is a really good chuck but the only issue I have is its not clear how to reverse the jaws correctly. Each jaw is marked with a number on one side (see one marked as 1 on one side) and are marked again on the other (the one marked as 1 has 4 on the other side). How do I get these correctly aligned up when adding them in reverse etc? It may be obvious but I can't really get on top of it?
|
Re: New Soba 50mm 4 jaw reversible M12 - how to reverse jaw in correct order?
Rob, I hope you realize that this is just a 4 jaw version of a 3 jaw chuck.? The advantage of the chuck with separate screws to move each jaw is that it¡¯s possible to hold items off center or more importantly adjust a part previously turned for zero runout.? I¡¯d still look at fixing your old 4 jaw. John ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Robert Vine
Sent: September 25, 2024 9:39 AM
To: Paul Allen
Cc: [email protected]
Subject: Re: [Unimat] New Soba 50mm 4 jaw reversible M12 - how to reverse jaw in correct order?? Hi Paul Many thanks and spot on indeed. I've also noted that following you're comments, if the jaw number on the chuck is match up to the same jaw number at the same side so as you can see the numbers placed to be seen together,the jaws fit up well when put in place. What a great chuck this is. ? Here is a notated version of the image: ? On Wed, Sep 25, 2024, 10:11?AM Paul Allen via <jp.paul.allen=[email protected]> wrote: When reversing the jaws, you will put them in using reverse ordering. So the #4 jaw goes into the #1 slot (so first), #3 jaw goes in the #2 slot, #2 jaw goes in the #3 slot, and #1 goes in the #4 slot. The way to tell aside from the stamped numbers on the jaws is by the distance of the scroll teeth on the jaw from the edge of the jaw that is going in first. The first jaw to go in will have the first tooth closest to the face going into the scroll. So in your picture of all 4 jaws facing the scroll teeth up, when putting them into the chuck with the beveled face inwards, the one on the right end will go in first, followed by each jaw in sequence. If you are reversing the jaws then it will go in the opposite order, starting with the one on the left end. I hope that helps. Paul Allen ? On Wed, Sep 25, 2024, 9:19?AM Robert Vine via <robert.vine36=[email protected]> wrote: I was very lucky as my wife treated me to a Soba 4 jaw central reversible chuck to get on with my work as I was having so much trouble filing the jaws of the HBM 50m 4 jaw chuck. The Soba is a really good chuck but the only issue I have is its not clear how to reverse the jaws correctly. Each jaw is marked with a number on one side (see one marked as 1 on one side) and are marked again on the other (the one marked as 1 has 4 on the other side). How do I get these correctly aligned up when adding them in reverse etc? It may be obvious but I can't really get on top of it?
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Re: New Soba 50mm 4 jaw reversible M12 - how to reverse jaw in correct order?
Hi Paul Many thanks and spot on indeed. I've also noted that following you're comments, if the jaw number on the chuck is match up to the same jaw number at the same side so as you can see the numbers placed to be seen together,the jaws fit up well when put in place. What a great chuck this is.
Mant thanks. Rob
Here is a notated version of the image:
On Wed, Sep 25, 2024, 10:11?AM Paul Allen via <jp.paul.allen= [email protected]> wrote: When reversing the jaws, you will put them in using reverse ordering. So the #4 jaw goes into the #1 slot (so first), #3 jaw goes in the #2 slot, #2 jaw goes in the #3 slot, and #1 goes in the #4 slot.
The way to tell aside from the stamped numbers on the jaws is by the distance of the scroll teeth on the jaw from the edge of the jaw that is going in first.
The first jaw to go in will have the first tooth closest to the face going into the scroll. So in your picture of all 4 jaws facing the scroll teeth up, when putting them into the chuck with the beveled face inwards, the one on the right end will go in first, followed by each jaw in sequence.
If you are reversing the jaws then it will go in the opposite order, starting with the one on the left end.
I hope that helps.
Paul Allen
On Wed, Sep 25, 2024, 9:19?AM Robert Vine via <robert.vine36= [email protected]> wrote: Hi All
I was very lucky as my wife treated me to a Soba 4 jaw central reversible chuck to get on with my work as I was having so much trouble filing the jaws of the HBM 50m 4 jaw chuck.
The Soba is a really good chuck but the only issue I have is its not clear how to reverse the jaws correctly. Each jaw is marked with a number on one side (see one marked as 1 on one side) and are marked again on the other (the one marked as 1 has 4 on the other side). How do I get these correctly aligned up when adding them in reverse etc? It may be obvious but I can't really get on top of it?
?
Many thanks
Rob
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Re: New Soba 50mm 4 jaw reversible M12 - how to reverse jaw in correct order?
Forgot to mention, this method is applicable to the 3 jaw scroll chucks as well.
Paul Allen
On Wed, Sep 25, 2024, 10:15?AM Paul Allen via <jp.paul.allen= [email protected]> wrote: Here is a notated version of the image:
On Wed, Sep 25, 2024, 10:11?AM Paul Allen via <jp.paul.allen= [email protected]> wrote: When reversing the jaws, you will put them in using reverse ordering. So the #4 jaw goes into the #1 slot (so first), #3 jaw goes in the #2 slot, #2 jaw goes in the #3 slot, and #1 goes in the #4 slot.
The way to tell aside from the stamped numbers on the jaws is by the distance of the scroll teeth on the jaw from the edge of the jaw that is going in first.
The first jaw to go in will have the first tooth closest to the face going into the scroll. So in your picture of all 4 jaws facing the scroll teeth up, when putting them into the chuck with the beveled face inwards, the one on the right end will go in first, followed by each jaw in sequence.
If you are reversing the jaws then it will go in the opposite order, starting with the one on the left end.
I hope that helps.
Paul Allen
On Wed, Sep 25, 2024, 9:19?AM Robert Vine via <robert.vine36= [email protected]> wrote: Hi All
I was very lucky as my wife treated me to a Soba 4 jaw central reversible chuck to get on with my work as I was having so much trouble filing the jaws of the HBM 50m 4 jaw chuck.
The Soba is a really good chuck but the only issue I have is its not clear how to reverse the jaws correctly. Each jaw is marked with a number on one side (see one marked as 1 on one side) and are marked again on the other (the one marked as 1 has 4 on the other side). How do I get these correctly aligned up when adding them in reverse etc? It may be obvious but I can't really get on top of it?
?
Many thanks
Rob
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Re: New Soba 50mm 4 jaw reversible M12 - how to reverse jaw in correct order?
Here is a notated version of the image:
On Wed, Sep 25, 2024, 10:11?AM Paul Allen via <jp.paul.allen= [email protected]> wrote: When reversing the jaws, you will put them in using reverse ordering. So the #4 jaw goes into the #1 slot (so first), #3 jaw goes in the #2 slot, #2 jaw goes in the #3 slot, and #1 goes in the #4 slot.
The way to tell aside from the stamped numbers on the jaws is by the distance of the scroll teeth on the jaw from the edge of the jaw that is going in first.
The first jaw to go in will have the first tooth closest to the face going into the scroll. So in your picture of all 4 jaws facing the scroll teeth up, when putting them into the chuck with the beveled face inwards, the one on the right end will go in first, followed by each jaw in sequence.
If you are reversing the jaws then it will go in the opposite order, starting with the one on the left end.
I hope that helps.
Paul Allen
On Wed, Sep 25, 2024, 9:19?AM Robert Vine via <robert.vine36= [email protected]> wrote: Hi All
I was very lucky as my wife treated me to a Soba 4 jaw central reversible chuck to get on with my work as I was having so much trouble filing the jaws of the HBM 50m 4 jaw chuck.
The Soba is a really good chuck but the only issue I have is its not clear how to reverse the jaws correctly. Each jaw is marked with a number on one side (see one marked as 1 on one side) and are marked again on the other (the one marked as 1 has 4 on the other side). How do I get these correctly aligned up when adding them in reverse etc? It may be obvious but I can't really get on top of it?
?
Many thanks
Rob
|
Re: New Soba 50mm 4 jaw reversible M12 - how to reverse jaw in correct order?
When reversing the jaws, you will put them in using reverse ordering. So the #4 jaw goes into the #1 slot (so first), #3 jaw goes in the #2 slot, #2 jaw goes in the #3 slot, and #1 goes in the #4 slot.
The way to tell aside from the stamped numbers on the jaws is by the distance of the scroll teeth on the jaw from the edge of the jaw that is going in first.
The first jaw to go in will have the first tooth closest to the face going into the scroll. So in your picture of all 4 jaws facing the scroll teeth up, when putting them into the chuck with the beveled face inwards, the one on the right end will go in first, followed by each jaw in sequence.
If you are reversing the jaws then it will go in the opposite order, starting with the one on the left end.
I hope that helps.
Paul Allen
On Wed, Sep 25, 2024, 9:19?AM Robert Vine via <robert.vine36= [email protected]> wrote: Hi All
I was very lucky as my wife treated me to a Soba 4 jaw central reversible chuck to get on with my work as I was having so much trouble filing the jaws of the HBM 50m 4 jaw chuck.
The Soba is a really good chuck but the only issue I have is its not clear how to reverse the jaws correctly. Each jaw is marked with a number on one side (see one marked as 1 on one side) and are marked again on the other (the one marked as 1 has 4 on the other side). How do I get these correctly aligned up when adding them in reverse etc? It may be obvious but I can't really get on top of it?
?
Many thanks
Rob
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New Soba 50mm 4 jaw reversible M12 - how to reverse jaw in correct order?
Hi All
I was very lucky as my wife treated me to a Soba 4 jaw central reversible chuck to get on with my work as I was having so much trouble filing the jaws of the HBM 50m 4 jaw chuck.
The Soba is a really good chuck but the only issue I have is its not clear how to reverse the jaws correctly. Each jaw is marked with a number on one side (see one marked as 1 on one side) and are marked again on the other (the one marked as 1 has 4 on the other side). How do I get these correctly aligned up when adding them in reverse etc? It may be obvious but I can't really get on top of it?
?
Many thanks
Rob
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The ER16 holder that I¡¯m making at the moment (with M19 x 1 ¡®mini nut¡¯) will allow the slide to go right under it, all the way to the headstock, on the U3. This allows you to (for instance) cut angles facing towards the tailstock using the taper slide. Hard to do with a small component using a 3 or 4 jaw.
?
I guess a ¡®standard¡¯ ER16 holder would be the same, but I don¡¯t know abour an ER32, or indeed the clearances on the earlier lathes.
?
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On Mon, Sep 23, 2024 at 01:11 PM, Carl wrote:
In my mind the only advantage to the ER16 is you can buy the chuck ready made.
ER16 collets are cheaper than ER 32, and ER16 go up to 10 mm, which matches the hole through the headstock. I found little need for anything bigger, although I did get an ER25 set for my U3 just because they were available and I could afford them. However my three jaw chuck for the U3 runs very true - 0.05 mm runout - so the collets are a bit redundant.
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If it's any help M40 ¡Á 1.5 is a standard metric conduit thread. Not so common yet as industry still has a long legacy of Pg threads, but you might be able to find a die that doesn't cost an arm and a leg.
?
And when you start the recess shown as 13.0 diameter should be a very tight tolerance 12.00 mm. I found a slightly worn 12 mm reamer which cut 11.995 mm, gave a really snug fit on the nose. I also made my collet holders (not ER) in hard brass. Easy to machine and good enough for light use.
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Great!!
On 9/23/2024 9:58 PM, OldToolmaker via
groups.io wrote:
toggle quoted message
Show quoted text
Hello Carl,
I found I have an M12x1 tap in great shape. So now I can make
my own ER32 adapter to fit the ER nut I have.
It pays scrounge in my tool chest. You never know what I can
come with to solve my dilemma. This is going to work out just
fine.
Thanks for your help!
Dick
--
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