Re: Threading Attachment?
I have one made for the job. It uses simple gearing to get metric pitches down to 0.5 mm. It would need substantial modification to get finer pitches or inch threading in tpi. It works using a crank handle on the spindle, rather than being motor driven.
The gears for the Basic lathe use 17 tooth gears to get close enough to inch pitches, but not many of them. If you have definite pitch requirements check that you can get them with whatever gearing you choose. There are clever ways to get inch pitches on metric lead screws and vice versa, and more obscure things like Mod and DP pitches, without using large gears like 127 tooth.
The U3 uses 1 Mod gears which are easy enough to get. The Basic uses 0.75 Mod, which are quite difficult to find.
Keith
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Martin's finds Updated 11/14/19
Where was I when this topic was posted?? I was just looking at the photos and Martin found the deal of the year!
Soooo... how are the little uni(s) doing now???
Tamra
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Re: Download files in one go
Don't see the original question. Was there one?? Some links:
DownThemAll?is a powerful yet easy-to-use extension that adds new advanced download capabilities to your browser.? DownThemAll?lets you download? all?the links or images on a website and much more: you can refine your downloads by fully customizable filters to get only what you really want.
DownThemAll?is open-source and free. We spend a lot of time making it, and keep spending a lot of time improving it, and even fixing some problems in Firefox itself so?DownThemAll! can work even better. We will never add adware, spyware, user tracking or other nasty stuff. Therefore we rely on your donations exclusively to fund the development.
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Re: Which motor is better?
You can buy those for quite reasonable?prices on eBay. I have a 2 kW one.?
Strangely enough, at an amateur radio event on Saturday, I found a 200w plug-in transformer that steps up from 120v to 240.
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Re: Which motor is better?
Carl, being in the US, 120v is not an issue.? I was more thinking that if I found a Unimat(or other small tool) with a higher voltage motor, I could then easily run it.??
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Re: Which motor is better?
It can also step down 220 - 110 Sent from my NOOK John Hutnick <johnhutnick@...> wrote: Strangely enough, at an amateur radio event on Saturday, I found a 200w plug-in transformer that steps up from 120v to 240.
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Re: Which motor is better?
Strangely enough, at an amateur radio event on Saturday, I found a 200w plug-in transformer that steps up from 120v to 240.
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And how would a counterweight be handled?? With an overarm bracket attached to a base for the machine?? Being silly, a pulley from the ceiling and a small sandbag weight?? Maybe a spring?is the easiest, although?we always think that we can improve things(and at times we do).
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Re: Which motor is better?
I believe they are about equal.? THe best motor offered was the U-100 which is a continuous duty motor none of this 80% duty cycle stuff.? Not sure but it may be possible to put ball bearings on either one instead of the sintered bronze aka oilite bushings
Ed
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Re: Threading Attachment?
Addition to the last message.? The do it yourself threading attachment file is in the Unimat 3 group file section, listed under Other Files,? as Threading Attachment Made on the Unimat 3. Happy Machining !
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Re: Threading Attachment?
I have seen plans for making a geared threading setup for the U3 from scratch and also plans for adapting a Sherline threading setup to the Unimat 3.? I just looked at the Unimat 3 files from the Unimat 3 group on groups io and found the Sherline to Unimat 3 conversion.? I have not taken the time yet to seek out the build it yourself threading set.? The only thing I remember about it was you cut your own gears and they were quite large, probably module 1.? Happy machining!
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Is a geared leadscrew threading attachment available for the Unimat 3. ?I imagine one could be built if it is not redilly available.
Dick
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I can¡¯t say as I never tried to do that. I¡¯d bet one or more members can definitively answer your question though. There are a lot of images so i suspect the full set would be quite large to download.
Cheers, Bill
William K. Macy 111 52 Lincolnshire Loop Asheville, NC 28803
land line: 828-505-1192 iPhone: ? 401-439-1705
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Re: New unimat member-circular saw arbor
Thanks for that. I didn't know there was a files section. Very useful. Is there a way to download all of the files in one go? So I can read them at my leisure.?
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Guys I was wondering is there much difference between motors? In particular which is best between the common U90 and the later 7750. I have a choice, Both motors are 240v versions.?
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Thanks for that. Brilliant thought.Simple is good usually! LBS On Tue, 25 Feb 2020, 12:23 KENNETH MURRAY-TAYLOR via Groups.Io, <kenmurraytaylor= [email protected]> wrote:
Hi
Couldn't you rig up a counter-weight system to lift the head. It would be cheap, easy to make, easy to adjust and sensitive as you want.
Regards Ken Murray-Taylor
On Thursday, 20 February 2020, 13:42:35 GMT, Martin P. via Groups.Io <mdupreno1= [email protected]> wrote:
I'm still looking for a quill return spring, so would appreciate any offers, but noting US offers carried an absurd import taffif! Thanks, Leslie
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Hi guys,?
I like the counterweight concept. Brain is now in gear.?
James? Dunfermline, Fife, UK? Sent from my Sony Xperia on the hoof
This email contains recycled electrons
On Tue, 25 Feb 2020, 14:03 OldToolmaker via Groups.Io, <old_toolmaker= [email protected]> wrote: Hi John,
I did something similar to your vertical dial indicator attachment. I had a spare vertical milling column so I tapped a single hole on the top end and use that to hold a dial indicator for vertical measurements. I have been using it for years.
Dick
--
James Batchelor?
Dunfermline, Fife, UK.?
07805 207238
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Thanks.? I agree that a hole in a column works.? Please note however: the vertical indicator arrangement that I made uses no holes or modifications to the Unimat.? The indicator holder is on a sliding shaft collar, so that you can move it up and down to match the head position. The bar across the motor mount uses tiny clamps, but no holes. At one time, "hkoesnadi", made a Unimat dial indicator holder that clamped across the bed with 2 wingnuts.? I can use a simple 2" travel dial indicator along the bed.? Digital long indicators seem expensive.?? The method of using a simple long digital stick gives the most range.? However, I have a hard time coming up with an easy mounting arrangement and no "slop".
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Hi John,
I did something similar to your vertical dial indicator attachment. I had a spare vertical milling column so I tapped a single hole on the top end and use that to hold a dial indicator for vertical measurements. I have been using it for years.
Dick
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Hi
Couldn't you rig up a counter-weight system to lift the head. It would be cheap, easy to make, easy to adjust and sensitive as you want.
Regards Ken Murray-Taylor
On Thursday, 20 February 2020, 13:42:35 GMT, Martin P. via Groups.Io <mdupreno1@...> wrote:
-----Original Message-----
From: Leslie Bevis-Smith <leslie.bevis.smith@...>
I'm still looking for a quill return spring, so would appreciate any offers, but noting US offers carried an absurd import taffif! Thanks, Leslie
https://www.ebay.co.uk/itm/UNIMAT-DB-SL-SPINDLE-RETURN-SPRING-CUP/324048177273?hash=item4b72c6c879:g:vS4AAOSwvgheJdT9
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Tamra
Carl
OldToolmaker
Unimat Matt
James Batchelor