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Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials

 

¿ªÔÆÌåÓý

Sherline has adjustable handwheels for their metric lathes, but they cost about $50 plus shipping and I don't know the the size of the shaft hole.

On 1/9/25 16:31, Frank In PA via groups.io wrote:

I was able to spend some time on the Little Machine Shop website earlier today and found a dial and handwheel that are listed as replacement parts for some Micro Mills. The dial shown has 40 graduations and the hand wheel has no handle on it. There are no details as to how they work together but appear to be friction type. I called there for more details and they have a voice message saying the shop is closed due to the fires. As far as a 40-graduation dial goes, I could manage to use it on the cross feed because it does not travel a great distance. Most of the work I do is not that precise and will always need checked before it is finished. ?At best I consider myself "amateur" but am looking for a dial that I can re zero during the cut. At this point it looks like this modification will be a combination of purchased parts that will need to be specially fitted to the lathe. Thank You, Frank? ?
Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials

 

I was able to spend some time on the Little Machine Shop website earlier today and found a dial and handwheel that are listed as replacement parts for some Micro Mills. The dial shown has 40 graduations and the hand wheel has no handle on it. There are no details as to how they work together but appear to be friction type. I called there for more details and they have a voice message saying the shop is closed due to the fires. As far as a 40-graduation dial goes, I could manage to use it on the cross feed because it does not travel a great distance. Most of the work I do is not that precise and will always need checked before it is finished. ?At best I consider myself "amateur" but am looking for a dial that I can re zero during the cut. At this point it looks like this modification will be a combination of purchased parts that will need to be specially fitted to the lathe. Thank You, Frank? ?
Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials

 

The 40 type is generally for us as amateur machinists who think inch to metric to inch concepts.
For my brain, with a Unimat, a 50 dial is a lot better.? 10 being .2m , 20-.4, and so on.
A pre-made graduated collar is a big help.? But what I don't want is to have to machine new dials at all.? I seem unable to get to all of the projects that I would like to do.
Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials

 

I thought it might be worth noting that the Little Machine Shop 40 divisions is meant to make a metric unit lathe emulate an English unit lathe.

They use 1 mm screws (with the exception of the "true inch" mini-lathe version which has 20 tpi screws with 0.050" per turn wheels which I believe is sold exclusively by Micro-Mark).

1 mm is 0.0394".? That is pretty close to 0.040".? So, the 40 division markings are similarly "pretty close."? On the 7x12minilathe group, owners don't seem to complain and tend to say they measure for the final cuts anyway.? And the error is small.? In the case of a mini-mill, I would think things might be worse as sometimes you are traversing a long distance, and many turns of the wheel mean the error will add up.

I saw one mini-lathe (perhaps not one of the Sieg manufactured ones but somebody else's) where the collars were marked in 39.4 divisions.? 39 equally spaced divisions where each really was 0.001" of movement and one last division that was smaller representing that 0.0004" from that 0.0394" value.? So those markings were honest, but confusing.

Charles E. "Chuck" Kinzer

On Thursday, January 9, 2025 at 08:26:44 AM PST, John Hutnick via groups.io <johnhutnick@...> wrote:


I searched online and on Ebay, and found no resettable dials/knobs for Unimats.? On Littlemachineshop, I found a graduated dial 40 divisions, which is labelled for 7x10 mini lathe.? Is there one for the Unimat, and I am missing it?? Or is the idea to adapt this one to whole new knobs that the user must machine?
Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials

 

I searched online and on Ebay, and found no resettable dials/knobs for Unimats.? On Littlemachineshop, I found a graduated dial 40 divisions, which is labelled for 7x10 mini lathe.? Is there one for the Unimat, and I am missing it?? Or is the idea to adapt this one to whole new knobs that the user must machine?
Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials

 

My needs are different from yours as I am going to install an imperial lead screw in place of the original Unimat lead screw as it suits my messing needs.
Dick
?
--
http://www.homemadetools.net/forum/?OFF-SET-tailstock-center-65965#post105972
?SMALL TURRET TOOL POST PLANS?
?LARGE TURRET TOOL POST PLANS
?MINI-LATHE CARRIAGE LOCK PLANS
?SMALL QC TOOL POST PLANS?
?QUICK CHANGE LATHE TURRET
?MINI LATHE COMPOUND PIVOT MODIFICATION
Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials

 

There is great variety of machine dials so you will have to select what suits your needs.
Dick
--
http://www.homemadetools.net/forum/?OFF-SET-tailstock-center-65965#post105972
?SMALL TURRET TOOL POST PLANS?
?LARGE TURRET TOOL POST PLANS
?MINI-LATHE CARRIAGE LOCK PLANS
?SMALL QC TOOL POST PLANS?
?QUICK CHANGE LATHE TURRET
?MINI LATHE COMPOUND PIVOT MODIFICATION
Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials

 

Just go to: wwwLittleMachineShop.com
All the information is on their website.
http://www.homemadetools.net/forum/?OFF-SET-tailstock-center-65965#post105972
?SMALL TURRET TOOL POST PLANS?
?LARGE TURRET TOOL POST PLANS
?MINI-LATHE CARRIAGE LOCK PLANS
?SMALL QC TOOL POST PLANS?
?QUICK CHANGE LATHE TURRET
?MINI LATHE COMPOUND PIVOT MODIFICATION
Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials

 

Do you have a part number for the dial. Or what category are they in?
Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials

 

Even though the Unimat is metric I would install Imperial (inch) lead screws as my micrometers are imperial. I don¡¯t need to complicate things. The only other pieces of measurement equipment is a 6¡± battery operated caliper and 0 to 6¡± depth micrometer set.
Dick
--
http://www.homemadetools.net/forum/?OFF-SET-tailstock-center-65965#post105972
?SMALL TURRET TOOL POST PLANS?
?LARGE TURRET TOOL POST PLANS
?MINI-LATHE CARRIAGE LOCK PLANS
?SMALL QC TOOL POST PLANS?
?QUICK CHANGE LATHE TURRET
?MINI LATHE COMPOUND PIVOT MODIFICATION
Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials

 

Little Machine Shop has these dials to suite practically any thread pitch. I saw prices around $14.00 each.
--
http://www.homemadetools.net/forum/?OFF-SET-tailstock-center-65965#post105972
?SMALL TURRET TOOL POST PLANS?
?LARGE TURRET TOOL POST PLANS
?MINI-LATHE CARRIAGE LOCK PLANS
?SMALL QC TOOL POST PLANS?
?QUICK CHANGE LATHE TURRET
?MINI LATHE COMPOUND PIVOT MODIFICATION
Re: Unimat Sl/DB Lathe Adjustable Handwheels/Dials

 

Here is a picture of the resettable dial I have. They are readily available.
--
http://www.homemadetools.net/forum/?OFF-SET-tailstock-center-65965#post105972
?SMALL TURRET TOOL POST PLANS?
?LARGE TURRET TOOL POST PLANS
?MINI-LATHE CARRIAGE LOCK PLANS
?SMALL QC TOOL POST PLANS?
?QUICK CHANGE LATHE TURRET
?MINI LATHE COMPOUND PIVOT MODIFICATION
Re: Mistery Unimat 3 with interesting modifications

 

There is no difference between Belleville washers and disc springs - just that Belleville is a trade name and they may offer sizes that are not in the "standard" metric range. For example I don't think the standard range includes ones that snap over, but it happens with the right (wrong?) combination of overall height, diameters and thickness. Sometimes it can be useful - for example in some of the torque wrenches that click when you get to the right torque. Of course those ones also click back when you stop squeezing them. Sounds like the ones from China were only approximately the same.
?
There is an extensive series sized for use as preload washers on metric bearings, so they shouldn't be too hard to find. I've seen them on Ebay (UK) offered in small numbers, and I found a Schnorr dealer who will sell you one if you like, as may be needed for repairs to some types of machinery - like small lathes, or big ones too.
Re: Tiny clock hands - advice please

 

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If the had was steel, I would make a brass washer to fit the back of the hand, close up the split, and solder the washer to the back of the had to reinforce the break.? I have made a washer with a tongue sticking out and used it to repair a hand broken off its hub.

On 1/5/25 10:50, Peter Brooks via groups.io wrote:

Thanks for the ideas¡­ it¡¯s actually split but it¡¯s worth a go, nothing to lose I guess!
Re: Tiny clock hands - advice please

 

Many thanks for the continuing advice - I have some 0.7mm material and piercing blades on the way.
?
I¡¯m going to take my time.
Re: Tiny clock hands - advice please

 

I have some doubt that a soldered split joint will provide a good force fit for this.? That is why others have suggested steel backing.
As far as the rat tail file, you may get lucky, depending on the dia and taper of the file.? But this is why tapered breaches have been suggested.
Re: Tiny clock hands - advice please

 

I would use a Jewelers saw, appropriate thickness of steel or brass, drill press and files.
I use Rio Grande brand jewelry saw blades and have a swiss jewelry saw - under $20 for the saw;
I have a really old one that was $2 that I travel with, it works too, just isn't as pretty, but I won't
get crazy if I leave it and forget to bring it home.
?
if the hole has a minimum flange you would have to mill the thickness after drilling the hole...
That is a little more complex but can be done with a end mill on the unimat, manually.? ?Just
use a piece large enough that can be manuevered under the flat end mill.
?
I would drill the hole first,
use end mill for relief from flange on the back side.
use a sharpie, and an awl to draw the design...
cut out with jewelry saw...
use files to clean up...
?
Use a Bird's mouth board for cutting with a jewelry saw.? My favorite instructor calls his
jewelry saw a multi axis cutting tool... it is so fun to be in his classes.
?
Alternatively you can solder or epoxy a washer to the back side of it and re-drill, too.??
?
But days to receive it in shipping and no matter how detailed I am at looking at the
description it could not be the right part....
?
It is easier to buy something but satisfying to make it - maybe an hour of time?
?
Tamra
?
?
Re: Mistery Unimat 3 with interesting modifications

 

Hello:
?
On Thu, Nov 21, 2024 at 08:57 PM, John Hutnick wrote:
... tell us who this Chinese supplier is.
On Thu, Nov 21, 2024 at 10:24 PM, Julius Henry Marx replied:
... receiving the package in a fortnight or less.
... post the purveyor's data before testing the springs if it is important to you.
... sure that what I am presenting is as advertised ...
?
Sorry for the delay but shipping from China, holidays and customs makes for a long wait.
This is just an update, I need some time to write up how the whole thing developed and include the end result.
?
------------------------------------------------------------------------------------------------------------------------
That said, I am sorry to have to report that the disks I purchased were not what I expected.
------------------------------------------------------------------------------------------------------------------------
?
While these CN chaps were quite accessible, price+shipping was not absurd and the dimensions were as specified, the purchased disks were not fit for the intended purpose. ie: replace the fatigue ridden ones.
?
TL;DR
The main problem (I think) being that they are not the same spec as the OEM ones and as a result behave differently.
When attempting to install them they deformed and snapped in opposite direction (think a sock being turned over violently).
?
Worse yet, when taken out again, they did not snap back by themselves.
To get them to their original shape / disposition I had to apply considerable force in the opposite direction.
?
Certainly not how a disk spring should behave.
?
This is (most probably) because they are not *disk springs* but *Belleville washers*.
Besides their not being fit for the intended use, the best indication of this is that they were sold indistinctingly under both names.
?
As has been posted here in another thread:
?
Belleville Washers are primarily used in heavy duty applications fastened together with a bolt where the load is considered static. Disc Springs can be statically loaded either continuously or intermittently, or dynamically subjected to continuous load cycling. Unlike Belleville Washers, Disc Springs are designed specifically to provide a repeatable force-travel relationship, and have a long and predictable fatigue life in dynamic or cycling applications.?
?
See for more on that very important issue.
?
----
?
@John Hutnick
?
?
While genuine disk springs are quite difficult to source (particularly in that size and spec*) it is not impossible to find them.
* 34.6X20.4X0.4 for 6003 series ball bearings
The ca. 1980 Emco Unimat manual (page 4?) lists it as "ZFD 94 3461 - 34.6x20.4x0.4 - Tellerfeder - Disk spring - Roncl. assiette".
But I have also seen the same part referred to as "ZFD 94 3461 34,6x20,4x0,4 - Tellerfeder - Disc spring - Ressort belleville" in the Emco Maximat Super 11 Service Parts manual.
?
Go figure ...
?
The weight of the thingy is ~1.8kg. / 1000 pcs which boils down to 1.8g /pcs.
That makes for less than 20grs. total shipping weight in small bubble wrap envelope for the 8 pieces needed.
?
The problem usually lies with the purveyors.
eg: refusal to sell, minimum quantities, minimum order fees, high prices, shipping costs and handling fees, etc.
?
Here is the list of the ones I found on the web and their conditions, in no particular order save for the last one.
There may be more, these are just the ones I found. YMMV.
?
Do bear in mind that some purveyors indistinctly list them as Belleville washers / Disk Springs.
That is something which would make me wary of ordering from them.
?
---
McMaster-Carr
94065K64 - US$9.83 / pack of 10
https://www.mcmaster.com/products/disc-springs/system-of-measurement~metric/springs-1~/belleville-disc-springs-for-ball-bearings/id~20-4-mm/thickness~0-4-mm/od~34-6-mm/
Does not sell or ship outside the US
---
Schnorr
242 800
https://www.schnorr-group.com/en/products/disc-springs/standard-disc-springs
Did not reply to my query
---
MW Components
BB-6003 - US$2.53 ea.
https://www.mwcomponents.com/shop/bb-6003cs
https://www.mwcomponents.com/shop/bb-6003cs/specs?variant=2027227
US$15.00 min fee
Ships only via FedEx
---
Springmasters UK
P34620404
https://www.springmasters.com/product-category/disc-springs/pre-load-disc-springs/?filter_thick=0-4&filter_outside-dia=34-6&filter_disc-type=plain-type
Minimum charge of ?15 plus carriage, packing & VAT.
Minimum order per item ?2.50.
Minimum order for overseas customers ?50 / US$100
---
Tevema
S83486 - €1.47ea.
https://webshop.tevema.com/gb/s83486
Minimum order €50
---
Caleb components
BB34620404
https://springfasteners.co.uk/product/disc-spring-34-6mm-x-20-4mm-x-0-4mm/
Did not reply to my query
---
Century Spring
BB-6003CS - US$2.53 ea.
https://www.centuryspring.com/shop/bb-6003cs
Under $25 order fee? $15.00
Did not contact them about shipping costs
---
?
These other purveyors did not have the specified metric size:
?
Soderman
https://www.industrial-springs.com/products/disc-springs
?
Spirol
https://shop.spirol.com/viewitems/disc-springs/disc-springs-to-din-en-16983
?
Fabory
https://www.fabory.com/en_GB/search?text=disk+springs
?
Mubea
https://mubea-discsprings.com/disc-spring-catalog/
?
Daemar
https://customerlink.daemarinc.com/landing/category/Engineered__Fasteners___---___Springs/Disc__Springs/DIN__2093__Metric__Series
?
Misumi
https://us.misumi-ec.com/vona2/detail/110300267860/
?
Accu Components
https://www.accu.co.uk/shop/precision-components/washers-spacers/compression-washers/disc-springs?page=1
?
---
?
Final note:
?
The best price, conditions, customer service (+ overall willingness to help) was found here:
?
https://shop.lesjofors.com/welcome
5033 - 0.89 EUR/pcs
https://shop.lesjofors.com/nl/en-US/all-products/disc-springs-washers/dsl-346x204x04-5033/
?
They sell them on-line and do so whether you buy one or 1000 with none of the usual BS found elsewhere.
?
The problem is that they only sell to these countries and ship via courier: ?
?
?
They have a representation in the US:
?
https://stockspringusa.com/springs/disc-springs.html
Minimum order $20
Shipping to the US only
?
But I did not find part no. 5033 in their US catalogue.
?
---
?
Right, that's about it.
Time permitting, I will follow up with the rest of the spring disk saga asap.
?
Best,
?
JHM
Re: Unimat Sl/DB Lathe Resettable Handwheels/Dials

 

Ron, that is a very good suggestion.? My Atlas 6 Inch or 618 lathe has one mounted on the compound. I think it could be adapted but it may involve lengthening the screw using one of the methods you described. Replacing the word adjustable to resettable unintentionally caused two threads on the same subject. The first one has the link you posted and am headed there to check it out. I will be more careful in the future. Thank You, Frank?
Re: Unimat Sl/DB Lathe Resettable Handwheels/Dials

 

FWIW, I just had the thought that perhaps a "good" option to put a bushing on the cross slide might be to use/make a . Mounted and clamped, the cross slide could be easily hand tapped.
?
Ron
521 - 540 of 64866