Look up the price and Seller and you will see.
If you are thinking good quality, you have to spend money, like Sherline.
The Ebay one is very likely crappy.
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Was that the one that has the option of a 2 slot or 4 slot base?? If the quality is good, it might useful to have in order to make a custom base that's more Unimat (or other machine) friendly.
-Dave
On Monday, May 13, 2024 at 01:10:38 PM PDT, John Hutnick <johnhutnick@...> wrote:
Further to my earlier message,? the Seller of the $62.69 rotary, Toolswholesale, sent me an Email that they want a "best offer".? So here is a big chance for someone.
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Re: Drilling... Thrilling
Thanks for the archive.org tip - plenty of mileage on there for relevant reading...? and then heading off at a complete tangent. I do like a tangent.?
Regards, Andy
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Thanks for replying. I was hoping to find someone who had a reasonably priced one that they would recommend... but based on that price I might try it and let everyone know what to expect.
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Further to my earlier message,? the Seller of the $62.69 rotary, Toolswholesale, sent me an Email that they want a "best offer".? So here is a big chance for someone.
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I checked Ebay, and you can buy an Indian 2 3/4" rotary table for as little as $63 including shipping.? Is a cheap junk good enough for your use?
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Agreed. Now to figure out where to mount said ?bracket
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On May 13, 2024, at 2:25?PM, Paul Allen via groups.io <jp.paul.allen@...> wrote:
? A simple wood bracket, or thin metal, should be sufficient.
Paul On Mon, May 13, 2024 at 12:16?PM William Macy < wkmacy@...> wrote: ?Thanks for your response. I was planning to do the same with the magnet Paul. I haven¡¯t got a 3d printer so I guess I¡¯ll have to invent a holder. Bill
? Where are you putting the magnet? I have one waiting to be installed myself, I plan on drilling a blind hole in the spindle pulley to mount the magnet. I'll probably design and 3d print a bracket for the sensor. Biggest concern is making sure it's easy to replace the belt, so a quick attach of some kind is likely the route I will go.?
Paul Does anyone have any ideas about how/where to mount the pickup of an el cheapo Chinese digital tachometer on a Uni SL? Locating the magnet is not a problem.
Thanks, Bill
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A simple wood bracket, or thin metal, should be sufficient.
Paul
On Mon, May 13, 2024 at 12:16?PM William Macy < wkmacy@...> wrote: ?Thanks for your response. I was planning to do the same with the magnet Paul. I haven¡¯t got a 3d printer so I guess I¡¯ll have to invent a holder. Bill
? Where are you putting the magnet? I have one waiting to be installed myself, I plan on drilling a blind hole in the spindle pulley to mount the magnet. I'll probably design and 3d print a bracket for the sensor. Biggest concern is making sure it's easy to replace the belt, so a quick attach of some kind is likely the route I will go.?
Paul Does anyone have any ideas about how/where to mount the pickup of an el cheapo Chinese digital tachometer on a Uni SL? Locating the magnet is not a problem.
Thanks, Bill
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?Thanks for your response. I was planning to do the same with the magnet Paul. I haven¡¯t got a 3d printer so I guess I¡¯ll have to invent a holder. Bill
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On May 13, 2024, at 1:06?PM, Paul Allen via groups.io <jp.paul.allen@...> wrote:
? Where are you putting the magnet? I have one waiting to be installed myself, I plan on drilling a blind hole in the spindle pulley to mount the magnet. I'll probably design and 3d print a bracket for the sensor. Biggest concern is making sure it's easy to replace the belt, so a quick attach of some kind is likely the route I will go.?
Paul Does anyone have any ideas about how/where to mount the pickup of an el cheapo Chinese digital tachometer on a Uni SL? Locating the magnet is not a problem.
Thanks, Bill
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On my DB200 the center height is about 12.3mm.? I think I¡¯d have to add a riser block to the spindle to even use something as small as these on axis with the lathe spindle.? With the milling head not a problem.? I think the 44mm one would probably work and they aren¡¯t that expensive. ?
? John ?
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From: [email protected] [mailto:[email protected]] On Behalf Of paul b via groups.io
Sent: May 13, 2024 9:45 AM
To: [email protected]
Subject: Re: [Unimat] Rotary table?? Yes, the SL indexing head can be used flat. See . On Monday, 13 May 2024 at 17:38:14 BST, Peter ashby via groups.io <aescinga.pgen@...> wrote: the unimat 3 indexing head can also be used flat on its back as a sort of rotary table depending on what you want to use it for, this will accept a chuck on the threaded nose- maybe the indexer for the sl can do the same. ------ Original Message ------ Subject [Unimat] Rotary table? Is anyone out there using a rotary table with their Uni's? if so what works?
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Where are you putting the magnet? I have one waiting to be installed myself, I plan on drilling a blind hole in the spindle pulley to mount the magnet. I'll probably design and 3d print a bracket for the sensor. Biggest concern is making sure it's easy to replace the belt, so a quick attach of some kind is likely the route I will go.?
Paul
Does anyone have any ideas about how/where to mount the pickup of an el cheapo Chinese digital tachometer on a Uni SL? Locating the magnet is not a problem.
Thanks, Bill
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Yes, the SL indexing head can be used flat. See .
Paul B.
On Monday, 13 May 2024 at 17:38:14 BST, Peter ashby via groups.io <aescinga.pgen@...> wrote:
the unimat 3 indexing head can also be used flat on its back as a sort of rotary table depending on what you want to use it for, this will accept a chuck on the threaded nose- maybe the indexer for the sl can do the same.
------ Original Message ------
Date 13/05/2024 15:43:38
Subject [Unimat] Rotary table?
Is anyone out there using a rotary table with their Uni's? if so what works?
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the unimat 3 indexing head can also be used flat on its back as a sort of rotary table depending on what you want to use it for, this will accept a chuck on the threaded nose- maybe the indexer for the sl can do the same.
------ Original Message ------
Date 13/05/2024 15:43:38
Subject [Unimat] Rotary table?
Is anyone out there using a rotary table with their Uni's? if so what works?
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Just go to ebay and buy one of those small rotary tables for 150 bucks or less. they are pretty much the same.?
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This month, Sherline has their rotary table on sale 20% off, which is still expensive at $269.83.? I have one and am satisfied.? Now if you don't care about made in the US, or you just need cheap, you can buy any Chinese or Indian one on Ebay.
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Does anyone have any ideas about how/where to mount the pickup of an el cheapo Chinese digital tachometer on a Uni SL? Locating the magnet is not a problem.
Thanks, Bill
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This month, Sherline has their rotary table on sale 20% off, which is still expensive at $269.83.? I have one and am satisfied.? Now if you don't care about made in the US, or you just need cheap, you can buy any Chinese or Indian one on Ebay.
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I have a 3" rotary table, and it's monsterously large, to the point of nearly useless. I'd be interested in one that fits the Unimat DB/SL machines, but the factory option is way out of my price range these days.?
When I got mine, it was the absolute cheapest rotary table I could find. I figured I could use it to help me build one larger. Should also be possible to build one smaller...? Though it looks like I may be running out of time.?
Bill in OKC?
William R. Meyers, MSgt, USAF(Ret.)
Aphorisms to live by: Good judgement comes from experience. Experience comes from bad judgement.? SEMPER GUMBY!
Expect in one hand, expectorate in the other. See which one gets full first.
On Monday, May 13, 2024 at 09:43:41 AM CDT, URGRA <flipsurveys@...> wrote:
Is anyone out there using a rotary table with their Uni's? if so what works?
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Re: Drilling... Thrilling
Andy, this is a worthwhile book to get if you has spare money:? https://www.amazon.com/Machinists-Engineering-Apprentices-Metalworkers-Illustrations/dp/1497100577
It's also #18 in the Workshop Practice series.?
https://www.amazon.com/Basic-Benchwork-Workshop-Practice-No/dp/0852429207
There's also this one, on measuring and marking metals, also a reprint from WPS.
https://www.amazon.com/Measuring-Marking-Metals-Home-Machinists/dp/149710193X
They're good sources, and most of the WPS books are available for less as used books through ebay and Amazon.?
If you go to archive.org you can find many of the old books on machining in pdf & other formats. Anything prior to 1929, IIRC, is now out of copyright in the USA, and so now in the public domain. The 1914 1st edition of Machinery's Handbook, for example. Check out the? Folkscanomy Engineering and Self Defense libraries. Also search keywords "machinist", "benchwork", "lathe", "milling machine", "milling" among others.?
You'll find a bunch of stuff you're not actually interested in, but you might find more things of interest, too. One author in ancient civilizations has the surname Machinist, and milling is also making flour from grain, something to do with making cloth, ant other I didn't go into. Author surnames you might find useful are Rose, Burghardt, Moltrecht, Hasluck, Roger's, and many more.
HTH!
Bill in OKC?
William R. Meyers, MSgt, USAF(Ret.)
Aphorisms to live by: Good judgement comes from experience. Experience comes from bad judgement.? SEMPER GUMBY!
Expect in one hand, expectorate in the other. See which one gets full first.
On Monday, May 13, 2024 at 07:09:25 AM CDT, Andy Carlson via groups.io <andycarlson@...> wrote:
Second post from me in two days...
This one relates to my next jobs on that cleaned up aluminium offcut but is also quite pertinent to the 'learning the basics' question.
My Uni spends a lot of time in drilling mode and does a pretty decent job of it for someone who can't find space for a dedicated pillar drill but I am often left feeling that there is room for improvement with my technique with holes slightly off target or deep holes diverging from the vertical by more than I would like.?
So... ?excluding modifications to the original machine, ?how to do drilling better on the DB or SL??
Specific variations and questions...
When to clamp and when to slide the vice/job around to move between holes??
Holding sheet material too big for a vice or table
How to hit the mark accurately (or why do I often miss?)?
Centre punch or edge find and use the dials??
Centre drill or not? (I now use a 3mm 90 degree spotting drill which is easier to eyeball onto marks)?
Do all ops on one hole before moving to the next or do all holes with one tool before changing tools??
Tool changes and limited quill travel (a consideration that the drilling section of 'Miniature Machining Techniques' seems to ignore)?
There may be better reading material available - most of what I have is about lathe work.?
Regards, Andy
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Is anyone out there using a rotary table with their Uni's? if so what works?
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Re: Spindle Bearing Lubrication
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URGRA
Bill in OKC too