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Re: Case / base for newly acquired PC/basic
Mert Baker used a cast iron griddle for that purpose, on one of his DB or SL units. I'd imagine it should be in the photos section, but haven't seen it in quite some time. I tend to use Mert's feats as a benchmark for things that I should be able to do when I have as much experience as he had. Well heck. It's not there. Dave W did something a little more ambitious, here:?/g/Unimat/album?id=195694? ?A larger enough plate of 1/2"/13mm aluminum would work, but be be pretty pricey.? 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! Physics doesn't care about your schedule. The only reason I know anything is because I've done it wrong enough times to START to know better. Expect in one hand, expectorate in the other. See which one gets full first.
On Sunday, March 19, 2023 at 12:03:02 PM CDT, clankennedy2004 via groups.io <clankennedy2004@...> wrote:
:/ Meh i would not use plywood but bolt it to a trolley or perhaps if you really want to lift it add yet more weight and use a steel frame but you don't want to add twist to the frame and then to the bed of your lathe so you have to be cautious on your approach. Even larger lathes can twist :/ So a steel plate perhaps with handles welded to that or perhaps bolted on might do the trick.
On Sunday, 19 March 2023 at 16:46:19 GMT, powster@... <powster@...> wrote:
Greetings everyone, I'm new to lathes and after a few months of yearning, I finally came across a PC/Basic in great condition. I don't have much work space and thus need a semi mobile setup (I.e. Lathe will be stored away when not in use) Are there any good strategies / ideas for building base for the PC basic model? Some notes: 1. With the vertical attachment it's abt 15-20kgs 2. I'd like to build a couple of handles on the left and right side of the base for easy lifting? Would plywood suffice? My main worry is lifting the entire base + machine by its handles (to be built on left / right side) would not be strong enough. Thanks in advance!? |
Re: Case / base for newly acquired PC/basic
:/ Meh i would not use plywood but bolt it to a trolley or perhaps if you really want to lift it add yet more weight and use a steel frame but you don't want to add twist to the frame and then to the bed of your lathe so you have to be cautious on your approach. Even larger lathes can twist :/ So a steel plate perhaps with handles welded to that or perhaps bolted on might do the trick.
On Sunday, 19 March 2023 at 16:46:19 GMT, powster@... <powster@...> wrote:
Greetings everyone, I'm new to lathes and after a few months of yearning, I finally came across a PC/Basic in great condition. I don't have much work space and thus need a semi mobile setup (I.e. Lathe will be stored away when not in use) Are there any good strategies / ideas for building base for the PC basic model? Some notes: 1. With the vertical attachment it's abt 15-20kgs 2. I'd like to build a couple of handles on the left and right side of the base for easy lifting? Would plywood suffice? My main worry is lifting the entire base + machine by its handles (to be built on left / right side) would not be strong enough. Thanks in advance!? |
Re: Case / base for newly acquired PC/basic
Use 3/4"/19mm plywood, and it should be quite strong enough. Make it just barely larger than the base area of the machine set up as you wish. Put runners of hardwood or perhaps metal under the base and bolt through them to fasten the handles to the runners and make the runners, base, and handles one unit. And start lifting weights if you're concerned about your own ability to lift it. You can start with cans of food, graduate to bags of cans, if you don't have access to a proper weight room or weights.
I had to lift my boxed Unimat DB200 the yesterday, and was surprised to find it felt rather heavy. There are a few things in the box that weren't there I when I got it last year, but they're mainly new? bearings and belts. The box minus those items was right at 25 pounds or about 11.3kg a year or so ago when I got it, so I'll be taking my own advice. The moving of furniture and boxes of stuff that I've been doing is apparently not adequate exercise to maintain my own strength.? Bill in OKC |
Case / base for newly acquired PC/basic
Greetings everyone, I'm new to lathes and after a few months of yearning, I finally came across a PC/Basic in great condition.
I don't have much work space and thus need a semi mobile setup (I.e. Lathe will be stored away when not in use) Are there any good strategies / ideas for building base for the PC basic model? Some notes: 1. With the vertical attachment it's abt 15-20kgs 2. I'd like to build a couple of handles on the left and right side of the base for easy lifting? Would plywood suffice? My main worry is lifting the entire base + machine by its handles (to be built on left / right side) would not be strong enough. Thanks in advance!? |
Re: Unimat 4 cross slide screw
Thank you everyone for all the suggestions and advice.
The lathe belongs to a company I'm working for. While we do have another working unimat and a much larger lathe which is capable of cutting a thread, I think the company would prefer an 'off the shelf' solution rather than someone spending the time making a new screw. However with the lack of availability of a ready to use replacement and difficulty finding the correct threaded rod, it's looking like a more reasonable option, and it's something I would be happy to learn to do! The U3 leadscrew looks like a good solution also, and less work involved - thank you Keith. I will have to offer these solutions to the management and let them make the decision! I will keep you posted |
Re: Unimat 4 cross slide screw
I've had a look at off the shelf screwed parts that might do the job. M8 left handed, yes, but not M8 ¡Á 1.
I can't get to it at the moment, but I might be able to do this on my brother's slightly larger lathe. I don't have much practice at screw cutting, but I did do an M12 ¡Á 1 screw to make a head locking screw for the SL. It will be a week or two before I can get to it. There is a longer lead screw for the U3 (same thread and handwheel) on Ebay UK, item?195622429555, that could be shortened to do the job. It would be a bit of a waste to cut it down, but that's not your problem! Looks like it would cost you about ?33 to get it, but it would save a lot of hassle. It might need a bit of further machining, but even with your bad cross slide screw it should be doable in your lathe. Grab it while you can? |
Re: Unimat 4 cross slide screw
The thread is M8 ¡Á 1 Left Handed. You can get dies for this at reasonable prices from China, so after that you need a way to screw cut the initial thread. Larger lathes should manage this. I think smaller ones would have trouble with the left hand business, but I will look at the threading gears for my U3 and see if they could be arranged to do it. If they can then I would think about the rest of the practicalities.
Keith In sunny Slough |
Re: Unimat 4 cross slide screw
¿ªÔÆÌåÓýHi Gang: To avoid threading, use two threaded rods and tap the larger to match the smaller. Lock the small thread in with a cross roll pin. Carl. On 3/16/2023 10:47 AM, OldToolmaker via
groups.io wrote:
I was looking at the picture of the cross feed screw and have another suggestion. The main portion of the screw is left hand. Purchase some left hand threaded rod stock and turn down and thread the small end to suit. This I believe this is doable by the average craftsman. |
Re: Unimat 4 cross slide screw
You can buy threaded rod in nearly any pitch and diameter you can imagine. For that matter, you can buy taps and dies likewise. Right or Left-handed threads, too. I believe I'd buy the tools to make the parts myself. In fact, I mostly already have, for my SL & DB. For two examples just in the past couple of years:? I don't know what threads are needed for the Unimat 3 & 4, but I'm certain you can get them. ;) That's a search on Amazon for LH threaded rod. Depending on where you are, it might not be any help for you, except to show that you can find such things if you go looking for them. I've lived and worked in Turkey, Saudi Arabia, and Germany, too, back before Amazon and eBay.? 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! Physics doesn't care about your schedule. The only reason I know anything is because I've done it wrong enough times to START to know better. Expect in one hand, expectorate in the other. See which one gets full first.
On Thursday, March 16, 2023 at 11:08:33 AM CDT, clankennedy2004 via groups.io <clankennedy2004@...> wrote:
Err correct me if I'm wrong but wont the thread be a finer pitch than standard threaded rod ? If you dont have the correct pitch then the dials increments will also be inaccurate ! Kind regards
On Thursday, 16 March 2023 at 14:47:55 GMT, OldToolmaker via groups.io <old_toolmaker@...> wrote:
I was looking at the picture of the cross feed screw and have another suggestion. The main portion of the screw is left hand. Purchase some left hand threaded rod stock and turn down and thread the small end to suit. This I believe this is doable by the average craftsman.
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Re: Unimat 4 cross slide screw
Err correct me if I'm wrong but wont the thread be a finer pitch than standard threaded rod ? If you dont have the correct pitch then the dials increments will also be inaccurate ! Kind regards
On Thursday, 16 March 2023 at 14:47:55 GMT, OldToolmaker via groups.io <old_toolmaker@...> wrote:
I was looking at the picture of the cross feed screw and have another suggestion. The main portion of the screw is left hand. Purchase some left hand threaded rod stock and turn down and thread the small end to suit. This I believe this is doable by the average craftsman.
|
Re: Unimat 4 cross slide screw
Hi Beck,
around July, 2021 I purchased a set of parts to replace the worn out ones on the original cross slide of my 1985 U3. The idea was to improve the overall precision of the cross slide, however by now I only replaced the nut, since what I saw when I disassembled, wasn?t in such a seriously bad condition. The parts that you see in the picture below are from?Emco Holz und Hobby GmbH, Agnieszka Ludkiewicz? A.Ludkiewicz@... ttps://www.emcoshop.at/298-emcoersatzzubehoerteiledrehmaschinenemcounimat3 I prefer to purchase originals parts directly from the manufacturer, since most of the time eBay prices are not that low, for a second hand product. On the other hand, in my country it is not allowed to import used products. A couple more reasons to your advantage when buying from EMCO. First, you can aks for a TAX / VAT discount, since it is an export product. By doing so, you can save something like 16%, if I do recall well. Secondly, Euro vs. Dollar exchange parity it?s at a lowest, however sometime in the begining of last year it was even lower. I hope my response help you solve your difficulty. Best regards, Ricardo. ? |
Emco - Niels Machines
¿ªÔÆÌåÓýThis website does sell and ship outside of the EU for sure and they regularly have all kinds of parts for sale https://www.nielsmachines.com/en/merken/emco/Verzonden vanaf mijn Galaxy |
Re: Unimat 4 cross slide screw
I was looking at the picture of the cross feed screw and have another suggestion. The main portion of the screw is left hand. Purchase some left hand threaded rod stock and turn down and thread the small end to suit. This I believe this is doable by the average craftsman.
|
Unimat 4 cross slide screw
Hello,
Does anyone know where I might be able to source a new cross slide screw for a Unimat 4? The one we have has worn too much to be functional. I¡¯m based in the UK but any options will be considered with international shipping! I have been keeping an eye on eBay but haven¡¯t seen anything so far. Thanks in advance, Beck |
Re: brazing broken teeth of 3-jaw chuck
¿ªÔÆÌåÓýHi Gang: If you know anyone in the EU, have Jan ship to them. Then work out shipping / customs with them. The jaws would fit in a small padded envelope. I did this for a friend in France. It worked out to two pallet loads of toy trains. Carl. On 3/16/2023 3:45 AM, phill005 via
groups.io wrote:
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Re: brazing broken teeth of 3-jaw chuck
Mar 15???#59506???
You might also want to explore the emcounimat.nl site, a new UNIMAT SL 3 jaw chuck sells there for €78 - not sure about freight cost to US but rather than just 3 jaws, this will get you a complete new chuck.
Have been in touch with the owner Jan unfortunately he does not ship out to UK do to too much hassle with customs and tax?not sure about other countries. Phill |
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