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Re: Newbie at collets

Protero Zoic
 

Hmm, looking at that maritool catalog I think I may have to first learn to learn specific terminology a bit better.

When I see the little male conical shape with the slots in it and a center hole of some specific size, I instantly call that the ¡°collet¡±. I know that ¡°collet¡± fits into a tapered female device which includes a surrounding nut to securely hold the ¡°collet¡± in place, and I tend to call that device a ¡°collet holder¡±. For that ¡°collet holder¡± to fit onto my Unimat the holder must first attach to an adapter device which I refer to as the 3-screw mounting plate and that is what screws onto my spindle.

Pictures of course are worth more than thousands of words and I¡¯m glad catalogs generally are well illustrated.

My hangup may come not so much with finding what I¡¯m calling the ¡°collets¡±, but rather in finding a ¡°collet holder¡± and the adapter device needed to fit onto my spindle.

OR ? Or am I over worrying it or worse, overly simplifying it?

Dick, thanks for your quick response.

alf,

On Apr 21, 2019, at 10:54, old_toolmaker@... [UNIMAT] <UNIMAT@...> wrote:

Alf,

The collet chuck you refer to if I understand correctly was the original accessory known as the E-11 series. It has a capacity up to 5/16¡± diameter and is not ¡°self releasing¡± which means you need to manually tap the collet out after unscrewing it which is a pain in the butt. The newer ER series is however self releasing which is very desirable. This is what I would recommend you get. If you have the skills you could make your own but that is a bit of work. I suggest you do some online research before jumping into anything. Try: maritool.com

Dick

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Posted by: old_toolmaker@...
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Re: Newbie at collets

 

Alf,

The collet chuck you refer to if I understand correctly was the original accessory known as the E-11 series. It has a capacity up to 5/16¡± diameter and is not ¡°self releasing¡± which means you need to manually tap the collet out after unscrewing it which is a pain in the butt. The newer ER series is however self releasing which is very desirable. This is what I would recommend you get. If you have the skills you could make your own but that is a bit of work. I suggest you do some online research before jumping into anything. Try: maritool.com

Dick
Newbie at collets

Protero Zoic
 

Folks, please would someone give me a really entry-level introduction to collets.

Despite being 77 yrs old and owning my SL1000 since 1971 or 1972 I have never, till now, given a thought to obtaining or using collets. Just recently when trying to do some small ( < 1&#92;4 inch ) turning and end drilling I have learned that my 3-jaw universal chuck jaws are far from ideal for accurately holding short small diameter rod material. Even over 48 years, because I have used that 3-jaw so little and so lightly at that, that I can¡¯t imagine that the jaws have worn; it must be inherent. My drill chuck is much more accurate but if I use it to chuck those small rods then I have no way to hold the end drill. I suppose I could buy another drill chuck.

But that brings me to considering learning about collets and perhaps obtaining a set.

So there¡¯s the background and here¡¯s my first question.

On page 27 of my particular owners manual they show a collet set that appears to have a short chuck which must be mounted onto a 3-screw threaded mounting plate very similar to (or perhaps the same as) the mounting plate behind the 3-jaw chuck. I assume that is the collet set I would be looking to obtain?

Considering that everything out there today is either new old stock or used, I need to know what to look for and what it¡¯s called. I see you folk very knowledgeably casually discussing collets by using several kinds of letter-designations and of course I get instantly glassy eyed at that. You know, that deer-in-the-headlights look.

So please, can someone help steer me just a bit for starters.
Thanks, alf in Iowa

alf,
alf,
U90 Brush Cap

[email protected]
 

Hey anybody! I am trying to resurrect a U90 motor and the last piece I need is one of the brush caps. Any leads are appreciated.
Interesting tool catalogs

 

I came across these while looking for something else. Looks like nice high end tools and supplies.?








Looks like Armstrong also sells kits and supplies for schools


Jeff
Unimat 1000 lathe - $350 (Bryan TX)

 



Unimat 1000 lathe - $350



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Re: unimat 3 motor capacitor availiability

 

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Picture?

You don't need to match it. You can use a 3-wire cap or two 2-wire caps.

The main thing is to find a combination or a single unit that fits.

Neil

On 4/14/2019 5:48 AM, geofflin3@... [UNIMAT] wrote:
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hi all i am looking to purchase a new capacitor for my unimat 3 motor it is the type with 4 leads 2 blue 2 black with an earth wire?

does anyone know where they are availiable please


geoff


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unimat 3 motor capacitor availiability

 

hi all i am looking to purchase a new capacitor for my unimat 3 motor it is the type with 4 leads 2 blue 2 black with an earth wire?

does anyone know where they are availiable please


geoff
Re: An odd U3 Headstock

[email protected]
 

I didn't bother to look for other parts. Good eye. Now it appears that this is a transitional U3 with the new name data plate but before they added the Fabr. Nr.s.


Cary
Re: An odd U3 Headstock

 

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Hello Gang:

Plus he will make several people happy that only need one more part for their lathe!

Carl.

On 4/12/2019 6:34 AM, keith schwarz gkskes@... [UNIMAT] wrote:

It appears that the person selling the Unimat headstock is parting out his lathe. Click on sellers other items and you will see all of the parts of a Unimat 3 lathe. By selling piece by piece he stands to make more $$$.

Sent from my electronic device


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Re: An odd U3 Headstock

keith schwarz
 

It appears that the person selling the Unimat headstock is parting out his lathe. Click on sellers other items and you will see all of the parts of a Unimat 3 lathe. By selling piece by piece he stands to make more $$$.

Sent from my electronic device
An odd U3 Headstock

[email protected]
 

Hello All,


On EBAY there is offered a unusual Unimat 3 headstock assembly. It has the later type of name plate that has a place for a Fabr.-Nr. but there is no 8 digit?number stamped there. Why? Item No. 143186595413


1. made before they stared adding the number to the lathes

2. sold as a replacement assembly or possible sold to be used in a custom application.


Best, Cary Stewart?
Re: ER Collets

 

You might check out MariTool for ER collets. They are made in USA. I purchased a full set of ER20 of Imperial sizes and they are definitely made in USA. It cost me over $200 for a set guaranteed less than .0003¡± total runout and they are worth every penny. Awesome company!
If you want quality this is it.

Dick
Re: U100 Motor Overhaul

 

I think a bit of brush noise is common. Having decided that was where the noise was coming from I decided not to worry about it, and nothing disastrous happened!


Keith
Re: U100 Motor Overhaul

 

There is no more noise and am not quite sure what the cause of the noise was. This is what I did/observed:

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1) With the brushes removed, the armature would spin freely by hand with no noise and there was no slack in the bearings.

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2) Commutator inspection revealed no scoring or other damage.

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3) There was some evidence of slight spark erosion along the trailing edge of the brushes.

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4) Length of the carbon brush and holder with spring expanded was a lot greater than the depth of the pocket where the brush & brush holder fitted meaning the brushes were not significantly worn and would still put good pressure on the commutator.

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5) Swapped the brushes and brush holders to their opposite sides of the motor ¡°frame¡±.

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6) Re-installed the 110 power cord and applied juice via a Variac.

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7) Slow running there was no noise other than what could be expected at slow speed.

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8) At 110 VAC there was some whirring but essentially it was no worse than a good U90 or any other small motor of similar design and size.

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9) With the brushes and holders back in their original positions, the noise returned.

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10) I did notice that the brushes are quite slack in their brush holders, IMHO they should be a snug fit but able to slide in the holder freely.

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Swapping the brushes and holders to the opposite sides resulted in the leading edge of each brush becoming the trailing edge....

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Hmmm¡­Your guess is as good as mine.


Peter B.
Rotary Table

 

I purchased off of eBay from India a tilting rotary table. While too tall to use on the db lathe without the raising block it does work nicely on my drill press. Fit and finish are very good, operation is smooth with minimal backlash, for the price $60 well worth the investment. There is a CNC shop in Fresno California that makes db sized stuff. I bought his quick change tool post last year, sure makes life easier changing tools. I think he can make other accessories also, contact him if you need something you can¡¯t find elsewhere.

Pat
Re: Rosemary paint

 

I went to my local Ace store yesterday, and they had 5 cans of hammered Rosemary on the shelf. I bought one, seems the original paint doesn¡¯t stand up well to tap-free neither the standard nor the aluminum blend, Kroil also raises the paint. So I see a spraying of the ways in my future.

Pat
Re: U100 Motor Overhaul

 

At first glance it looks more complicated then the U90 motor, but looking more closely it could be easier to work on. The switch is a standard type probably still available, although I wonder if it still has the voltage rating, and the suppressor cap should be easy enough top replace, since it is a reasonable size.

I don't need the pictures myself, but they will be useful to someone out there.



Keith



---In UNIMAT@..., <pbrixey41@...> wrote :

Hi Keith, I did post some pictures earlier today. No captions on them yet.
Re: U100 Motor Overhaul

 

Hi Keith, I did post some pictures earlier today. No captions on them yet.
Re: U100 Motor Overhaul

 

I have found suitable brushes in my local hardware store, where they sold the Hillman brand of fasteners and electrical parts. There was no exact fit, but ones a little bigger can be easily filed down. As long as the spring/contact is similar enough.

Martin P.

-----Original Message-----
From: Neil Morrison neilsmorr@... [UNIMAT]

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I would pull the brushes and try a sewing machine repair shop to see if they can match them.
Otherwise it's Google, eBay etc.
I never found one of these where I had to undercut the commutator although I'm sure it can happen.
Definitely examine the commutator for damaged segments etc.
Neil
On 4/3/2019 7:02 AM, pbrixey41@... [UNIMAT] wrote:
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Thanks Neil for the suggestions, but I don't need to have someone do it for me; I've been doing electrical overhauls/repairs since the 50s. I was hoping someone had an exploded view or parts list they would care to share. I seem to recall seeing similar posted in the group previously but cannot find anything. Maybe I am hallucinating.
Do you know of a source of brushes if I need any?

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