Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials
All my measurements are in inches. So one revolution of my lead screw equals.050¡±
That is because I installed an inch leadscrew. No more manual conversion.
Dick
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http://www.homemadetools.net/
By
OldToolmaker
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#64427
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Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials
One millimeter is 0.03937 inches. For convenience we usually round up to 0.040 when making back-of-the-envelope calculations, but that rounding error will compound over the length of the leadscrew. So
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Elliot Nesterman
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#64426
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Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials
Looks like great fun but dangerous (from a wallet draining point of view)¡ luckily I¡¯m in the UK so will avoid the risk! :-)
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Peter Brooks
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#64425
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Re: Unimat 3 Mill/Drill Attachment Question
To maybe return this topic to something about machining, Unimat vertical columns were being discussed.? I happened to get an Email with a Harbor Freight coupon for 15% off anything.? If you need a
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John Hutnick
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#64424
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Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials
Hi Gang:
Here is the white blank with black inserts:
This is the vernier for a 7.5¡ã dial. So 10 spaces equal 1.1¡ã.
See it at Cabin Fever next week! Who else will be there?
Carl.
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Carl
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#64423
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Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials
If you are making your own, an old hack from the Gingery series is to get a
very thin metric measuring tape, like the pocket ones that are about 1/4"
wide.
Turn a dial to the correct diameter for that
By
Tool247
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#64422
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Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials
Little Machine Shop is located in Pasadena. And even the parts of the county not on fire currently are probably over-run with refugees. I grew up out that way, and the population has about doubled
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Bill in OKC too
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#64421
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Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials
Aah. That makes sense now....
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________________________________
Sent: Friday, January 10, 2025 9:46:41 AM
To: Andrei <calciu1@...>;
By
Andrei
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#64420
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Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials
Yes, the Unimat is a metric machine, having a leadscrew of 1mm pitch.? The practice of 40 divisions is a carryover, saying that 1 division is .001.? 1 division is actually .03937".? So with a 50
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John Hutnick
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#64419
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Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials
Hello:
Why 50 graduations? The lead screw is a 1mm pitch, or 0.040". Wouldn't 40 graduations be more useful? 1/50 would be 0.00078" while 1/40 would be 0.00098".
Also I just made a dial from white
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Carl
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#64418
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Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials
I think because they were talking about a supplier called The Little Machine Shop, which apparently is located in Pasadena, California (in the USA).
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Peter Brooks
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#64417
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Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials
For my needs I will use a dial with 50 graduations as I use imperial measuring tools. I have been using this system all my life. No point in me changing now at my age.
--
http://www.homemadetools.net/
By
OldToolmaker
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#64416
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Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials
Where is the connection between lathe dials and wildfires? I am super puzzled.
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Sent: Friday, January 10, 2025 8:12:21
By
Andrei
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#64415
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Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials
If you don¡¯t want to make your own resettable dials you¡¯re only other option as I see it is to purchase what you need.
It may be a challenge finding them right now due to the wild fires in
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OldToolmaker
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#64414
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Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials
Sherline has adjustable handwheels for their metric lathes, but they cost about $50 plus shipping and I don't know the the size of the shaft hole.
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Charles Daldry
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#64413
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Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials
I was able to spend some time on the Little Machine Shop website earlier today and found a dial and handwheel that are listed as replacement parts for some Micro Mills. The dial shown has 40
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Frank In PA
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#64412
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Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials
The 40 type is generally for us as amateur machinists who think inch to metric to inch concepts.
For my brain, with a Unimat, a 50 dial is a lot better.? 10 being .2m , 20-.4, and so on.
A pre-made
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John Hutnick
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#64411
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Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials
I thought it might be worth noting that the Little Machine Shop 40 divisions is meant to make a metric unit lathe emulate an English unit lathe.
They use 1 mm screws (with the exception of the "true
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Charles Kinzer
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#64410
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Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials
I searched online and on Ebay, and found no resettable dials/knobs for Unimats.? On Littlemachineshop, I found a graduated dial 40 divisions, which is labelled for 7x10 mini lathe.? Is there one for
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John Hutnick
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#64409
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Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials
My needs are different from yours as I am going to install an imperial lead screw in place of the original Unimat lead screw as it suits my messing needs.
Dick
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http://www.homemadetools.net/ forum/
By
OldToolmaker
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#64408
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