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Re: 3-jaw chuck as dividing head
I like the item Carl posted;? wish this fit a unimat.? Or did I miss something and it does fit.? ? I think all these divisions are too much info for a miniaturist; I can't imagine needing anything past 24 divisions and here is a post proving me wrong, that if I ever want a 10 spoke wheel or 10 flutes on a turning I need 36 divisions?!!
Has anyone made this kind of pin setup with an indexing wheel for the unimat??? Tamra |
Re: 3-jaw chuck as dividing head
开云体育I've looked at sink drain strainers. I got one somewhat (but not
exactly) like this:
Unfortunately they didn't choose the number of holes in each ring optimally for use for dividing. You want one with the holes in rings. Some have the holes in a
hexagon pattern. On 3/8/20 8:29 PM, Carl wrote:
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Re: 3-jaw chuck as dividing head
开云体育Hi Gang: In Model Engineer Magazine one guy use a Kitchen Colander as a divider, I think it had some odd prime spacing like 29. Carl. On 3/8/2020 7:28 PM, Keith S. Angus via
Groups.Io wrote:
On Sun, Mar 8, 2020 at 07:55 PM, Mehmood wrote: |
Re: 3-jaw chuck as dividing head
On Sun, Mar 8, 2020 at 07:55 PM, Mehmood wrote:
I want to make a set of 10-spoke wheelsI saw someone doing this at a show long ago. He made a disc that fitted in the tyre, then cut the spokes (really the gaps)in the discs using the saw attachment. After cleaning up he then put the spokes into the tyre and soldered them together. These were loco drivers in 0 scale, so a bit bigger, but it worked. As for the ring having 180 teeth, well, why not? I often look at straight knurled and ribbed items that we throw away, bottle tops for example, that would serve as divisions for setting out. I would print out, or draw using school geometry, a disc of card to put behind the blanks. For the tyres, I have an H0 RP25 form tool you could try. I've never got around to using it, but somebody should - all I have to do is find it! Keith |
Re: 3-jaw chuck as dividing head
开云体育Hello Mehmood: Spin
Indexers are not too expensive, and has 1° steps, so it would
be easy to make 36° divisions. Might have to mount it behind
the base?? Carl.
On 3/8/2020 3:55 PM, Mehmood via
Groups.Io wrote:
I don't have a dividing head but I want to make a set of 10-spoke wheels (outside diameter 11mm plus flange).? The spokes only require visual, cosmetic precision, not mechanical precision (the crankpin locations do require mechanical precision but that's not an issue).? I counted the knurling notches around my Emco 3-jaw chuck and there are 180.? Not sure if this is a coincidence, but it therefore occurred to me to cut my wheel-blank in the 3 jaw chuck along with its axle hole, then use the chuck as a dividing head if I could concoct a simple and reasonably stable way of holding the chuck by locking the adjusting ring by its knurls such that I could unlock it, turn it through 18 notches and cut or just mark and start each spoke cutting into the blank.? Has anyone done anything similar?? |
Re: 3-jaw chuck as dividing head
https://www.youtube.com/watch?v=CHyZyZBy0Ng
Dividing Head Plates 3D Printed TIPS #627 tubalcain
Zitat von "Mehmood via Groups.Io" <mehmood.naqshbandi@...>:
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3-jaw chuck as dividing head
I don't have a dividing head but I want to make a set of 10-spoke wheels (outside diameter 11mm plus flange).? The spokes only require visual, cosmetic precision, not mechanical precision (the crankpin locations do require mechanical precision but that's not an issue).? I counted the knurling notches around my Emco 3-jaw chuck and there are 180.? Not sure if this is a coincidence, but it therefore occurred to me to cut my wheel-blank in the 3 jaw chuck along with its axle hole, then use the chuck as a dividing head if I could concoct a simple and reasonably stable way of holding the chuck by locking the adjusting ring by its knurls such that I could unlock it, turn it through 18 notches and cut or just mark and start each spoke cutting into the blank.? Has anyone done anything similar??
I was thinking I would do it in the horizontal, lathe, position using a locking mechanism made up of a saddle that sits on the way bars, probably cut semi-circular or V groove to rest on them.? The saddle would embrace say the bottom quarter of the knurled ring of the 3-jaw chuck, and embedded in it would be one or maybe two movable teeth that would grip the knurled ring, wedged into place by e.g. a tapered rod through a hole tangential to the saddle and ring and pressing the foot of the locking tooth into the knurled ring.? It would not need to take much strain, it only serves to hold the chuck in an assured position while I mark or cut the work along the spindle axis. Currently I am anticipating reusing wheel treads made commercially, that would fit tightly around the spokes when done and soldered into position, but if this is successful I'd try my hand at turning the tyres (wheel tread+flange) as well. |
Re: Anybody remember this item?
EBay item: 202251420815
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Jim On Mar 6, 2020, at 4:53 PM, Martin P. via Groups.Io <mdupreno1@...> wrote: |
Re: Anybody remember this item?
Alfred Fickensher
Thank you Jim.
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alf, On Mar 6, 2020, at 16:44, Jim Novack <jnwoofer@...> wrote: |
Re: Anybody remember this item?
I can only look at the first picture. same on site. -----Original Message-----
From: Alfred Fickensher <alfickjr@...> To: unimat <[email protected]> Sent: Fri, Mar 6, 2020 4:42 pm Subject: [Unimat] Anybody remember this item? Dummy me, I grabbed some screen shots of the bracket and post but no grab of the listing with the seller’s name. I’d kind of like to buy one if possible. I think I remember seeing mention of this on this group a year ago (almost) and then went to ebay to find the listing.?
Thanks hopefully,
alf
Sent from my MacBook Air |
Anybody remember this item?
Alfred Fickensher
开云体育Dummy me, I grabbed some screen shots of the bracket and post but no grab of the listing with the seller’s name. I’d kind of like to buy one if possible. I think I remember seeing mention of this on this group a year ago (almost) and then went to ebay to find the listing.? Thanks hopefully, alf Sent from my MacBook Air |
Re: Unimat on TV show
Tamra, I was incorrect earlier, Grimm is on Amazon Prime. ?Thanks.
On Wednesday, March 4, 2020, 08:14:56 AM EST, Tamra <tamrabrogdon@...> wrote:
I didn't know Grimm was on Netflix... if it is still on during the summer we will binge watch it again.? I liked all the gadgets in the show, would be fun to make them in miniature... The Unimat is also on display at the Kansas City Toy & Miniature Museum, and master Miniaturist Wm Robertson is using it for their informational interactive video at the museum. Tamra |
Re: Unimat on TV show
I didn't know Grimm was on Netflix... if it is still on during the summer we will binge watch it again.? I liked all the gadgets in the show, would be fun to make them in miniature...
The Unimat is also on display at the Kansas City Toy & Miniature Museum, and master Miniaturist Wm Robertson is using it for their informational interactive video at the museum. Tamra |
Re: Unimat sl 3 jaw Chuck disassembly/ reassembly
Be careful!!
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From the Miniature Machining Techniques in the files _/g/Unimat/files/Unimat_Too/Miniature%20Machining%20Techniques/Miniature%20Machining%20Techniques%20-%201963.pdf __ In normal position, the chuck jaws __will take round work up to 15/16" on__the inside. Or using the backs of the __jaws on tubing, etc., you can handle up __to a 2-5/32" diameter. By reversing the __jaws, larger work can be machined up __to 2-15/64" diameter. To reverse jaws,__remove as explained before, but reverse __each jaw and replace in the chuck in __this order: jaw #3 in slot #1; jaw #2__in slot #2; and jaw #1 in slot #3.__ _ and with drawings_ /g/Unimat/files/Unimat_Too/Unimat%20Operating%20Instructions/Correction%20for%20.pdf%20Page%209%20and%2010.pdf _ On 3/3/2020 3:43 AM, Carl wrote:
Hello His: |
Re: Unimat sl 3 jaw Chuck disassembly/ reassembly
Hello His:
It is easy. Turn the scroll until the jaws are free. They are numbered 1,2,3. Turn them around. Watch the scroll for the start of the thread and put the jaws back in 3,2,1. Run the jaws to the center, if you did right the jaws will all get there at the same time. Carl. Sent from my NOOK david@... wrote: Want to flip the jaws around to receive a larger work piece but don't want to tear anything up.? ?Tia. |