Re: Unimat 3 Vertical Milling Attachment; Pinion
Thank you Keith, Peter_B and Peter_N. This is very helpful and I should be able to fabricate one of these per the need.
Cheers,
Timothy Jump
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Re: Edelstall cutting tool system
When hand grinding HSS tool bits keep a small container of water or water soluble coolant to dip the warm tool bit into. A HSS tool bit should not be allowed to get overheated. HSS ?has red hardness, but I am a stickler for not heating my tool bits to that point. I don¡¯t want to see ?any burn discoloration. Just my personal opinion. I think it shows poor workmanship.
Others may have differing opinions of course.
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
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Re: Unimat 3 Vertical Milling Attachment; Pinion
The 'handle' is held in place by a grub screw at the end of the pinion, I wouldn't glue it if you ever want to be able to use the U3 Fine Feed Attachment (EMCO part number 151.110).  ? 
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Re: Unimat 3 Vertical Milling Attachment; Pinion
Sorry for my first replay, I misunderstood Timothy.
Here is the dimension of my part, as it should be called in English, and a photo of it.?
Peter Nyffeler
 
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Re: Edelstall cutting tool system
It was made for a 5 inch lathe, it fits a 1/2 inch collet.
On 6/25/24 05:13, John Entwistle via
groups.io wrote:
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Show quoted text
i have one of those. how are you supposed to mount them?
?
Yes those are the
Edelstaal fly cutters, they cam in 2 different sizes
?Jeff
<2750.jpg>
A few weeks ago I was going through a drawer in
my little work shed and came across these. This
was a drawer that I put all those thing that did
not go too well and was quite cluttered with
junk. I do remember putting these in that drawer
decades ago. Back then the drawer was not so
cluttered.
I have done some research, but find nothing
about these. The stock number (2750) does not
show in any catalogue that I have. Could these
be Unimat's fly cutters?? One is in the original
package.
Any info would be appreciated. Thanks.
Larry
<2750.jpg>
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Re: Unimat 3 Vertical Milling Attachment; Pinion
If you don't worry about making a replica of the original Unimat one, and their construction did vary, you can do it all without dimensions apart from knowing that the main shaft is 12mm diameter, same as the OD of the gear. Also the versions I have used did not have the circlip groove. Some had the gear teeth cut directly on the shaft and others looked like a gear had been fitted. There's no reason why your]s shouldn't be different so long as it does what you want.
Take a bit of 12 mm diameter steel and turn down enough of one end to poke through the gear and some way further. Offer this into the hole in the headstock and see how it looks. Trim off the end of the shaft until the gear engages nicely with the rack on the quill. I suspect you might not need anything sticking through, but just take a look to make sure. Fix the gear on the shaft - I would use Loctite or an equivalent to get a solid fixing. Grub screws will not be good enough. Then trim off the shaft to a sensible length, with about 30 mm protruding above the headstock. Face and chamfer this end. Drill a 6 mm hole at an angle of about 15¡ã and fit a bit of 6? mm steel bar about 100 mm long - fix it with Loctite. All fits should be close, but not? press fit, unless you can make them a really tight fit, in which case you won't need any Loctite. Drill and fit a 20 mm plastic ball on the end. Job done. Dimensions could vary according to what feels comfortable for you.
At some stage consider what surface finish you want. I would use chemi-blacking. Just do it before the plastic ball goes on.kee
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Re: Unimat 3 Vertical Milling Attachment; Pinion
Thank you Keith for getting me the spline specs. What I still need are length dimensions. I've attached a rough drawing of the Unimat 3 vertical milling attachment pinion with the length dimensions marked in both blue and red arrows. For the blue arrows I need the edge-to-edge lengths. For the red arrows I need the edge to hole center lengths. I can also use the OD of the body of the pinion, the OD of the handle rod, the overall length of the handle rod, and the length of the protrusion of the handle rod short end (for accommodating the fine feed gear). I appreciate any help I can get, finalizing these measurements. Thank you, Timothy Jump  ?
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Re: Edelstall cutting tool system
It is a bit different. I was just trying to help, OK.
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Re: Edelstall cutting tool system
>>>>Don't wear your best clothes, sparks eat t-shirts, or stand off to the side, or wear a shop apron.? I have a leather apron somewhere... but haven't found it for a while...<<<
When you start grinding your tool bits... and an ordinary bench grinder works well... for HSS...? I would have to look at the wheel to tell you what is on it...
Bill in OKC, is correct, wearing gloves will keep your hands from feeling the heat as you grind your tool bits.? You want to know the bit is getting warm so you can dunk it in water, so don't wear gloves.? I use a baby food jar.? Sparks are not really different from sparklers, in my experience... It was Independence day in Canada on 7/1 I think and Independence Day in America, so sparklers have always been my favorite... the fireworks are likely to begin in a couple of hours here... crazy neighbors blow up their money; I buy tools!
Tamra
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Re: Edelstall cutting tool system
I posted a PDF of my? instruction sheet for the Edelstaal Cutting
Tools on June 10.?? It might be a good idea to check that before
posting another one.
On 7/3/24 15:56, pbrixey wrote:
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Show quoted text
Just a few moments ago I found the original instructions for THE
EDELSTALLCUTTING TOOL SYSTEM. It incli=udes illustrations. If
there is not a copy in the files, I can creat a PDF file and post
it, if I can remember how to post a file. Perhaps a member could
let me know if there is a copy there?
Peter B now in sunny in Florida.??
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Re: Edelstall cutting tool system
I think grinding your own High Speed Steel Toolbits is very important skill.? I am still learning about degrees of rake, recently purchased the OneWay systems for pen lathe and normal size lathe tools and will watch the video, perhaps I can get the info to transfer to my brain from the larger world to my miniature 1/12th scale world.? ? If I am turning wood free hand for miniatures I use a Jet mini wood lathe. Free hand turning is an enjoyable start of the day here in our corner of the world.
Don't wear your best clothes, sparks eat t-shirts, or stand off to the side, or wear a shop apron.? I have a leather apron somewhere... but haven't found it for a while...
I bought my tool blanks from MSCDirect and for small stuff I use 1/8" square tool bits by Interstate.? They used to be in the metalworking sale catalog.? I have a distribution center in the next county, so I usually place my order in person or I have to give someone my credit card, and I don't like to do this... shipping is more expensive then picking them up...? This was pre C-19, though... I probably bought 10 of them and have only sharpened 3-4... I use these on brass on my unimat; I usually turn wood for miniatures on my taig lathe...for items that are measured.? I love the cross slide feature on a machinist's lathe...and use this when I need to make two of something where the goal is measurable precision...
Tamra
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Re: Edelstall cutting tool system
Just a few moments ago I found the original instructions for THE EDELSTALLCUTTING TOOL SYSTEM. It incli=udes illustrations. If there is not a copy in the files, I can creat a PDF file and post it, if I can remember how to post a file. Perhaps a member could let me know if there is a copy there?
Peter B now in sunny in Florida.??
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Re: Unimat 3 Vertical Milling Attachment; Pinion
Thanks Peter. Good to know.
Cheers,
Timothy Jump
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Re: Unimat 3 Vertical Milling Attachment; Pinion
If you¡¯re going to use the fine feed attachment on the U3 milling head you will need to be able to fit the additional small cog (part of the fine feed adjustment) onto the lever.
The cog is held captive by the short end of the thin ¡®handle¡¯ locating in a slot in the cog. You would have to examine the lever in some detail to get that correct.
Just something to bear in mind if considering manufacturing the lever from scratch.
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Re: Unimat 3 Vertical Milling Attachment; Pinion
Thanks Keith! This will help me identify a spline blank if I need to fabricate my own pinion.
Cheers,
Timothy Jump
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Re: Unimat 3 Vertical Milling Attachment; Pinion
The gear for the headstock quill is 10 teeth, 1 Mod, so a standard metric gear. Usually gears below 12 teeth are adjusted to prevent undercutting the teeth, but for this job they are not. I got some suitable gears from a Chinese supplier, but never got around to using them as my SL went abroad. However I might make up a handle as I have a spare headstock that I might convert into a small pillar drill.
So the gear spec is 10 teeth, 1 Mod, OD 12 mm. I think I got mine from Ebay, item number 166358248864 (in the UK).
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Re: Unimat 3 Vertical Milling Attachment; Pinion
Hi Timothy:
I needed a
quill handle too, but found a gear in the junk box that would
work. It had one less tooth, but still works fine. I think the
gear came out of a can opener.
Carl.
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Re: Unimat 3 Vertical Milling Attachment; Pinion
Hi Peter, Thank you for this. I feel remiss in that I did not accurately describe the part I'm looking for. I've included a photo below with the pinion circled in red. Measurements I will need for the spline are OD, RD, #of teeth, tooth thickness at pitch, length. For the body I need overall length, OD, and position and width of the slots. I truly appreciate any help with this.? -Timothy Jump 
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Re: Unimat 3 Vertical Milling Attachment; Pinion
Peter any chance of a photo of the attachment. I'm unaware of it ! :/
On Monday, 1 July 2024 at 07:36:14 BST, Peter Nyffeler <peter@...> wrote:
The pinion dimensions are:
diameter ?28mm
length 320mm
mounting holes 6.2mm with countersunk cylindrical dia. 10.5mm 5mm deep
lower mounting hole position form bottom end 6.5mm
mounting holes distance 27mm
on top end thread M14x1 23mm deep with countersunk cylindrical dia. 22mm 1mm deepdimensions are:
diameter ?28mm
length 320mm
mounting holes 6.2mm with countersunk cylindrical dia. 10.5mm 5mm deep
lower mounting hole position form bottom end 6.5mm
mounting holes distance 27mm
on top end thread M14x1 23mm deep with countersunk cylindrical dia. 22mm 1mm deep
hope this helps you
Peter Nyffeler
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Re: Unimat 3 Vertical Milling Attachment; Pinion
The pinion dimensions are:
diameter ?28mm
length 320mm
mounting holes 6.2mm with countersunk cylindrical dia. 10.5mm 5mm deep
lower mounting hole position form bottom end 6.5mm
mounting holes distance 27mm
on top end thread M14x1 23mm deep with countersunk cylindrical dia. 22mm 1mm deepdimensions are:
diameter ?28mm
length 320mm
mounting holes 6.2mm with countersunk cylindrical dia. 10.5mm 5mm deep
lower mounting hole position form bottom end 6.5mm
mounting holes distance 27mm
on top end thread M14x1 23mm deep with countersunk cylindrical dia. 22mm 1mm deep
hope this helps you
Peter Nyffeler
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OldToolmaker
Tamra
Carl