Re: Unimat 3 / PC Cross Slide Backlash from HANDLEWHEEL
Hello,Carl Aggreed! Backlash compensation was the first thing we learned in trade school when learning to operate the lathe. The same principle applies to most any machine tool, although theses days
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OldToolmaker
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#59747
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Re: Unimat 3 / PC Cross Slide Backlash from HANDLEWHEEL
This. Somebody wiser than I am tought me that me that you can't ever totally eliminate backlash on a screw and nut setup. You can lessen it so it is less obnoxious, but you can't eliminate it. So you
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Davis Johnson
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#59746
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Re: Unimat 3 / PC Cross Slide Backlash from HANDLEWHEEL
Hi Gang: As a toolmaker we learned to always turn the cranks the same way, usually clockwise. This has fallen to the wayside with ball screws and digital read outs. Carl.
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Carl
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#59745
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Re: Unimat 3 / PC Cross Slide Backlash from HANDLEWHEEL
Hi Jpow, Having come the same way as you do, I just would like to toss in here my humble 2 cents of wisdom without any claim to UNIMAT 3 lathe mastery at all, but here goes: In this rather
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Herman de Leeuw
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#59744
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Re: Unimat black crackle jig-saw
Re the comments from Mr. Jaynes, here is a piece from Ebay showing Unimat gray. Does anyone have this color?
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John Hutnick
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#59743
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Re: Unimat 3 / PC Cross Slide Backlash from HANDLEWHEEL
Hello Jpow:? I have just used some thrust bearings on my unimat when I fitted stepper motors they are working very good here is the info: 4 pieces AXK0515/AS0515 Budget Needle Roller Cage with 2 AS
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phill005
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#59742
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Re: Unimat 3 / PC Cross Slide Backlash from HANDLEWHEEL
Hello Jpow: They also sell plastic washers to put behind the hand wheel. Allows you to reduce the clearance with less friction. Ball thrust bearings might be nice if you can find any. ( I might have
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Carl
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#59741
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Last Call for cheap books
It¡¯s been a decade since Lindsay Publications, Inc. officially closed their doors and now the time has come for Your Old Time Bookstore to do the same. We've begun our final inventory consolidation
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Jkle379184
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#59740
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Re: Unimat 3 / PC Cross Slide Backlash from HANDLEWHEEL
It's possible your lead screw is bent, if it is, the bearing surfaces will touch at some points and not at others, that could be the cause of the tightness.
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Unimat Matt
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#59739
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Unimat 3 / PC Cross Slide Backlash from HANDLEWHEEL
Hey all, I'm having this really irritating problem with backlash coming from the Unimat PC cross-slide handwheel. My understanding is that backlash (for the Unimat) can come from two sources A) Play
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jpow
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#59738
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Re: Unimat black crackle jig-saw
This what I can find in SE Asia where I live, I've chosen the silver for my old model. Tbe pale green looks ok, maybe too green. On Wed, 5 Apr 2023 at 8:14, Steve Johnson<steve@...> wrote:
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David James
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#59737
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Re: Unimat black crackle jig-saw
Mine is a horrid colour and I will repaint it, I have managed to find silver hammered. What colour logo did the original cast iron models have? I dont have a logo on mine hopefully I can have a
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David James
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#59736
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Re: 4 jaw chuck M12 x 1 thread
Get the Sherline chuck. They are better quality than the emco ones.
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Unimat Matt
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#59735
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Re: Unimat black crackle jig-saw
I also have a red badged SL that has the Gray Hammered finish. And it is not uncommon for the motors to be a shade lighter then the lathe.?Jeff
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Jkle379184
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#59734
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Re: Unimat black crackle jig-saw
Thanks very much Pat for the information. Looks like those eccentrics more often are missing now than present ? Was making the cam for mine out of brass and, like you, the shaft in steel. I¡¯m
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Alan Ehrlich
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#59733
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Re: Unimat black crackle jig-saw
I found the text from my discussion of Unimat Colors, circa 1999. ?Sorry, I haven't resurrected the photos, but will keep trying: ------------- UNiMAT Colors ------------- I have identified four
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Steve Jaynes
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#59732
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Re: Unimat black crackle jig-saw
EARLY in my Unimat collecting days, I read that the "Sears Roebuck" Unimats and accessories were, for some period of time, shipped in the Black Crackle finish. ?That said, "mixed" sets may or may not
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Steve Jaynes
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#59731
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Re: Unimat black crackle jig-saw
Alan, I too received a fret saw without the eccentric and without the drive cam, I made both on my Unimat.? ?It is documented on this site, If you can't find it let me know and i will send you
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pat goodyear
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#59730
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Re: 4 jaw chuck M12 x 1 thread
Thank you Bill for sharing your advice and experience! I don't have much equipment so looking to get started first. I didn't know about emco being Cast iron vs steel for the sherline. Once my skill
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jpow
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#59729
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Re: Unimat black crackle jig-saw
Gorgeous! Thanks too, VERY much for including the fret saw¡¯s eccentric wheel in your photos. That bit was missing from mine and I never before managed to find a pix of it. Thought the form would be
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Alan Ehrlich
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#59728
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