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Re: Alternative motor for the Unimat SL
Hope you looked carefully at the shipping costs before you ordered. I wanted 3 of them, they wanted $63 and up in shipping, where one? was $11.98 or so. I'll be looking elsewhere. I'll get something one of these days. I'm a cheap bastrich, and can't spend that much on shipping. ;) 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
On Sunday, June 12, 2022, 08:26:54 PM CDT, sawbona@... <sawbona@...> wrote:
Hello: > ... look at my album ... Will do. Thanks for the heads-up. > ... used a 130 W ... Earlier today I ordered one similar to the one referenced by NapierDeltic in his post. Only US$7.92. https://www.aliexpress.com/item/33009729521.html?gatewayAdapt=glo2esp > ... polyurethane belts and found they never slipped. Yes, I have heard that they don't slip. But I cannot help but thinking that a slipping belt is a sort of insurance. And could eventually save a locked lathe. > ... shock had been efficiently transferred to the motor bearings ... > ... needed to be replaced (with high quality ones - I suspect the originals were a bit cheap and cheerful). Yes. Maybe I should do that directly do it before installing the motor.? 8^/ > ... motors get longer ... Yes. The version I ordered is only 80mm long (200W/280mN. m) I think the 300W version is 172mm long and 400mN. m. Just over twice as long for ~43% more torque, same diameter. > ... shafts are 8 mm so a direct fit for the U3 pulley and the fixing screws line up with the slots in the U3 ... That's good to know. I also ordered a ER113mm chuck spindle just in case I want to use a different pulley.? > ... new set of pulleys ... > ... speed controller for it ... > ... get the speed nearly right with the belts ... Yes, same here. I wonder if there's a power curve graph available for these motors. It would help in finding the speed range with the highest torque. Thank you very much for your input. Best, JHM |
Re: Alternative motor for the Unimat SL
On Mon, Jun 13, 2022 at 02:26 AM, @juliushenrymarx wrote:
Earlier today I ordered one similar to the one referenced by NapierDeltic in his post.Are you sure about that? According to my currency convertor that's about 95 USD. Available on Ebay UK for about ?45 from China. Probably taxes and things on top of that. Also says 55 USD. |
Re: Alternative motor for the Unimat SL
Hello:
> ... look at my album ... Will do. Thanks for the heads-up. > ... used a 130 W ... Earlier today I ordered one similar to the one referenced by NapierDeltic in his post. Only US$7.92. https://www.aliexpress.com/item/33009729521.html?gatewayAdapt=glo2esp > ... polyurethane belts and found they never slipped. Yes, I have heard that they don't slip. But I cannot help but thinking that a slipping belt is a sort of insurance. And could eventually save a locked lathe. > ... shock had been efficiently transferred to the motor bearings ... > ... needed to be replaced (with high quality ones - I suspect the originals were a bit cheap and cheerful). Yes. Maybe I should do that directly do it before installing the motor.? 8^/ > ... motors get longer ... Yes. The version I ordered is only 80mm long (200W/280mN. m) I think the 300W version is 172mm long and 400mN. m. Just over twice as long for ~43% more torque, same diameter. > ... shafts are 8 mm so a direct fit for the U3 pulley and the fixing screws line up with the slots in the U3 ... That's good to know. I also ordered a ER113mm chuck spindle just in case I want to use a different pulley.? > ... new set of pulleys ... > ... speed controller for it ... > ... get the speed nearly right with the belts ... Yes, same here. I wonder if there's a power curve graph available for these motors. It would help in finding the speed range with the highest torque. Thank you very much for your input. Best, JHM |
Re: Alternative motor for the Unimat SL
If you look at my album?Keith's DB_SL in Photos you will see the motor type many of us use successfully. I used a 130 W on my SL and it had plenty of power. I can't see why the U3 should need more. I ran it with Doug Feistamels polyurethane belts and found they never slipped. When I did have a problem (big bang - everything stopped) I found the shock had been efficiently transferred to the motor bearings, which needed to be replaced (with high quality ones - I suspect the originals were a bit cheap and cheerful). These motors are available from 100 to 200 W (that I have found). The motors get longer and slower as the power goes up. The one I used on the SL was shorter than the U90 motor, and gave more space around the chuck. They all have the same fixings on the shaft end, but the brushes (and therefore the cable entry) can be at either end. Generally the shafts are 8 mm so a direct fit for the U3 pulley and the fixing screws line up with the slots in the U3, so no mods to the motor plate are needed. The ones with a toothed belt pulley have a better shaft than the ones with a chain sprocket, but the sprocket is easier to get off. If you can find one with a longer shaft that will also be better.
I have a 150 W motor just waiting to go onto my U3, and I don't expect any problems. However I might make up a new set of pulleys, to compensate for the loss of the two speed motor. I do have a speed controller for it, but I like to get the speed nearly right with the belts before tweaking the controller - on the SL I rarely use the controller. Continuous use for an evening did not cause the motor to run hot, just a little warm. There are a few other photo albums of fitting these motors to the DB/SL, but it is much simpler on the U3. I know it has been done, but it does not require much explanation, drawings, or photos. |
Re: Alternative motor for the Unimat SL
Hello:
> ... 150w motor purrs and does not even get warm. > ... like a safety feature. Indeed. And a good one too. Replacement parts for these thinguies (with all respect) are quite/increasilgly? hard to come by. And expensive. One more question if I may, with respect to the PS to use for this motor: Which one/type/spec do you use in your respective setups? Any links you could share so I can find one? Thanks in advance, JHM |
Re: Alternative motor for the Unimat SL
Hello:
> ...? used it on a 24v motor for several hours without issue. Good to know. > if you lock the spindle the belts will slip ... Yes, I wasn't sure that would happen. Certainly not with a toothed belt. I've also seen videos where it seems the toothed belts are very noisy. Not something I'd want. Thanks a lot for your input. Best, JHM |
Re: Alternative motor for the Unimat SL
My 24vdc? 150w motor purrs and does not even get warm. I have been using white rubber "o" rings for drive belts and they work great. I like that it can slip if I bury the cutter or some act of stupidity. It is like a safety feature.?
?Jeff -----Original Message-----
From: Peter ashby via groups.io <aescinga.pgen@...> To: [email protected] Sent: Sun, Jun 12, 2022 2:00 pm Subject: Re: [Unimat] Alternative motor for the Unimat SL using mine I have used it on a 24v motor for several hours without issue. (it barely gets warm)
if you lock the spindle the belts will slip, not sure if this would be the case with a toothed belt
------ Original Message ------
From: sawbona@...
To: "NapierDeltic" <m.mastacaneanu@...>; [email protected]
Sent: 12/06/2022 16:35:47
Subject: Re: [Unimat] Alternative motor for the Unimat SL
Hello: |
Re: Alternative motor for the Unimat SL
using mine I have used it on a 24v motor for several hours without issue. (it barely gets warm) if you lock the spindle the belts will slip, not sure if this would be the case with a toothed belt
------ Original Message ------
From: sawbona@...
To: "NapierDeltic" <m.mastacaneanu@...>; [email protected]
Sent: 12/06/2022 16:35:47
Subject: Re: [Unimat] Alternative motor for the Unimat SL Hello: |
Re: Alternative motor for the Unimat SL
Hello:
I have recently purchased a Unimat 3 and am currently in the process of finding a suitable motor to replace the original 90W one. I plan to eventually set it up on the grinding column so as to avoid the unmount/mount/mount process each time I need to mill something. One option I have seen are the ubiquitous 220V/7000rpm sewing machine motors which are supposed to be made for continuous use but, like the original Unimat 3 motor, are at the most rated at 100W, at least the ones I can get locally. I'd be very obliged if you could share your insight/experience with this spindle motor, which seems to be a much better option. - Using it @24V, how long can you use it before it needs to cool down? ie: have you found it to be prone to overheating? - @200W, it is over 2X the original motor's rating. Have you found it necessary to install an overcurrent protection to protect the lathe in case of a lock-up or jam? Thanks in advance, JHM |
Re: Unimat? parts for sale
Alan Rothenbush
Thanks for this!
When I first looked at the belts, they seemed like they could be Sherline belts, only a second look showed them to be much too long.? So since they were in the same box as the Unimat bits, I assumed them to be Unimat belts. But now, I think you may be right, they may be for one of my wife's sewing machines and somehow creeped into MY storage area.? (The nerve!) As to the handle, it's not bent and it's not rusty.? There is some wear, it has been used, for sure.? The factory "blackening" is gone, but that seems to be all the wear, the surface black. Anyway, we'll see if anyone is interested.? I'm not about to put them on eBay .. too much hassle, methinks, and I don't really care about the money.? But I need to start minimizing, if only to save my wife some bother.? ?My days may well be numbered (with a smallish number) and it would be a sin to just toss them. |
Re: Unimat? parts for sale
You have the feed handle for a Unimat DB or SL (same lathe for most purposes) and a dead centre for the same Unimats. The centre is not anything special, but the feed handle is much sought after.
The belts are a standard Vee belt commonly used on sewing machines and similar light machinery. I have often wondered whether they could be used on a Unimat, but I never found out. They are easy enough to find on Ebay if you know what size you need. In summary - belts - probably no interest here. Centre - someone might want one. Current price $15 (US) for two on Ebay - you rarely need two. Feed handle - should get a decent price. I'm currently seeing none on Ebay worldwide and it looks to be in good condition - no rust, handle not bent, no visible wear. I think this is very little used, if at all. Not of any use to me as my SL has gone to Australia and I haven't! |
Re: Unimat? parts for sale
the handle is a unimat part, the center is likely one as well would need to know the shafts size to be sure, the belts i have not seen that style used in any of the unimat stuff I have looked into since starting, they also seem very big? my biggest belt that I have thats pre-made could not fit the handle in it.
good luck in selling them? |
UNIMAT DB200 for sale..Fully Restored
Yes machine is missing 2 parts. First one is that handle and the second one being the tool post. Spring and retaining piece is in fact there. So just the handle missing. It was missing both when i got it. I had used my own tool post off of my other lathe for the little bit of playing around that I did with it.? So new owner will have to purchase both parts to finish machine.?
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To the gentlemen that mentioned pricing.? I? am in fact somewhat familiar with pricing of these machines. Im going to just throw this out there so you guys know where I stand on this machine.?
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I purchased this lathe as a project to restore. To learn the inner workings and to use for another project that Im working on. While i enjoyed working on this machine and IT IS a great machine. I quickly realized the limitations of it. Im not able to do what I originally planned, so at this point, I'd like to see it go sooner then later. For this reason, Ive chosen to not tie up any more funds into this project.?
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With that said, honestly..... the first person to make an offer above $425+? (plus a little extra for shipping) will have themselves a very nice little machine.? No doubt its worth that much, plus some. Just tryingto recoup some of my money and time invested in this project. I believe thats a very reasonable price range/asking price.?
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From what Ive been seeing on ebay, machines in way worse shape, missing major parts, rusted beyond recognitoon and yet they continue to have ridiculous asking prices way higher then mine. So thats where Im at on this machine.?
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I hope someone take advantage of the deal and machine goes to a good home. To the few that paid compliments. I thank you.?
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To everyone else, your comments and concerns have been noted. Questions answered to the best of my ability. i thank you for your time and feedback.?
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Any offers please email me at Chillin4life187@...
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Unimat? parts for sale
Alan Rothenbush
First, let me say I hope this post is OK .. different groups have different rules.
Anyway, while cleaning up today, I ran across a few things that I THINK are from a Unimat, but I don't actually know, as my last time in front of a Unimat was well over 40 years ago.? (I'm an old man .. breakfast is a fuzzy memory.? The 70s ...) The longer belt says "2114L" and could be new.? The shorter one says "1712" and looks well used.? I'm not sure it has any value. Anyway, rather than put them back into a drawer for another 40 years, I figured I'd let the members of this list know about them. As to price, that's a trickier thing.? How about "best offer a week from now", plus shipping by Canada Post, which seems to be about 10.00 USD to continental USA. Alan |
Re: UNIMAT DB200 for sale..Fully Restored
¿ªÔÆÌåÓýAnother standard piece that may be missing is the handle that allows one to move the spindle back and forth (or up and down when configured as a mill or drill press).? I could not tell from the pictures if the spindle spring and or the cup that retains it were also missing. ? Jerry F. ? ? From: [email protected] [mailto:[email protected]] On Behalf Of Chillin4life187@...
Sent: Tuesday, June 07, 2022 6:25 AM To: [email protected] Subject: [Unimat] UNIMAT DB200 for sale..Fully Restored ? To the gentlemen that caught my mistake. My apologies gentlemen....The machine is in fact a SL1000 with the lighter aluminum base versus the heavier DB200 ( cast iron base).? -Machine vice? (factory Unimat accessory)? -Handtool rest (for woodworking), -Sanding plate -Set of brand NEW indexable 1/4 inch carbide lathe cutting bits purchased from Harbor Freight. Threw away the original packaging it came in but bits have never been used.? - Vertical headstock adapter for milling attachment. Unfortunately I do not have the other pieces to set up as a mill. Everything you see is what came with machine when I purchased it.? -Quick release handle for factory tool post. Purchased on ebay but never used it since I used my own personal tool holder from another lathe I own. -Drill chuck w/key |
Unimat miniature precision lathe - $1,000 (Santa Rosa, SF Bay CA)
Miniature precision metal lathe with autofeed. Upgraded more powerful motor with speed control. Separate reversible motor for feed. Convertible to mill. Control screws are smooth and not sloppy. If you are unfamiliar with the prices of these, look at the prices on Ebay. Neil ----- |
UNIMAT DB200 for sale..Fully Restored
To the gentlemen that caught my mistake. My apologies gentlemen....The machine is in fact a SL1000 with the lighter aluminum base versus the heavier DB200 ( cast iron base).?
I am also attaching another photo of some of the parts/accessories that I had forgotten to mention. They are also included in the sale:? -Machine vice? (factory Unimat accessory)?
-Handtool rest (for woodworking),
-Sanding plate
-Set of brand NEW indexable 1/4 inch carbide lathe cutting bits purchased from Harbor
Freight. Threw away the original packaging it came in but bits have never been used.?
- Vertical headstock adapter for milling attachment. Unfortunately I do not have the other pieces to set up as a mill. Everything you see is what came with machine when I purchased it.?
-Quick release handle for factory tool post. Purchased on ebay but never used it since I used my own personal tool holder from another lathe I own.
-Drill chuck w/key Thanks for looking!! |