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I have a 6" x 1" round piece of aluminum that I need to turn into a flywheel for the model engine I am building. I was thinking of using superglue to secure it to my faceplate as it obviously does not fit in any of my chucks.
Any suggestions how to hold this or should I go looking for someone with a bigger lathe.
Dave
Borneo
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While challenging, you can probably do it on the 7 inch lathe. Getting the cutting tool out that far will be a bigger challenge than just holding it.
Superglue can be a legitimate method for work holding. Is this a solid flywheel? If not and it has, or will have, some spokes or similar feature you may be able to hold it by bolting through openings with perhaps a little fixturing (little pieces of plate to act as big washers).
You can always try on the small lathe. And if it doesn't work out, then find something larger.
Usually the "swing" of a lathe is not really a practical diameter to machine, but more as a dimension for something that large on which you are machining a much small feature. But machine a disk is possible. I machined a 16 inch disk on my 12x36 lathe but it had a gap bed permitting an 18 inch swing. And I have machined a 6 inch diameter disk on my 7x16 MicroMark and then made a cut to make it a donut (to ultimately be curved trim pieces for a project), but it was wood, so I don't think that counts.
Charles E. "Chuck" Kinzer.
On Tuesday, June 11, 2024 at 02:57:00 PM PDT, David James via groups.io <davebjames@...> wrote:
I have a 6" x 1" round piece of aluminum that I need to turn into a flywheel for the model engine I am building. I was thinking of using superglue to secure it to my faceplate as it obviously does not fit in any of my chucks.
Any suggestions how to hold this or should I go looking for someone with a bigger lathe.
Dave
Borneo
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How will the flywheel mount to the engine? Maybe drill a smaller hole where the hub will go and mount it on an arbor to turn it? What do you have to do to it? Any opportunity to clamp it to the faceplate via holes that won’t be there when it’s finished (like if there will be be spokes or a cutout?) even if there aren’t,
I know Clickspring uses superglue a lot but I think 6” x 1” is a little big for that.
On Jun 11, 2024, at 2:56 PM, David James via groups.io <davebjames@...> wrote:
I have a 6" x 1" round piece of aluminum that I need to turn into a flywheel for the model engine I am building. I was thinking of using superglue to secure it to my faceplate as it obviously does not fit in any of my chucks.
Any suggestions how to hold this or should I go looking for someone with a bigger lathe.
Dave
Borneo
--
Bruce Johnson
The less a man knows about how sausages and laws are made, the easier it is to steal his vote and give him botulism.
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I have used superglue many times to hold small jobs. It works, especially for thin parts such as aluminum sheets, etc. I also want to share a strange experience. I found the original ($$) superglue by Loctite failing often. That made me try a cheap superglue sold in a Dollar store. It worked much better.
-Prasad Eastern PA
On Tuesday, June 11, 2024 at 06:11:51 PM EDT, Charles Kinzer <ckinzer@...> wrote:
While challenging, you can probably do it on the 7 inch lathe. Getting the cutting tool out that far will be a bigger challenge than just holding it.
Superglue can be a legitimate method for work holding. Is this a solid flywheel? If not and it has, or will have, some spokes or similar feature you may be able to hold it by bolting through openings with perhaps a little fixturing (little pieces of plate to act as big washers).
You can always try on the small lathe. And if it doesn't work out, then find something larger.
Usually the "swing" of a lathe is not really a practical diameter to machine, but more as a dimension for something that large on which you are machining a much small feature. But machine a disk is possible. I machined a 16 inch disk on my 12x36 lathe but it had a gap bed permitting an 18 inch swing. And I have machined a 6 inch diameter disk on my 7x16 MicroMark and then made a cut to make it a donut (to ultimately be curved trim pieces for a project), but it was wood, so I don't think that counts.
Charles E. "Chuck" Kinzer.
On Tuesday, June 11, 2024 at 02:57:00 PM PDT, David James via groups.io <davebjames@...> wrote:
I have a 6" x 1" round piece of aluminum that I need to turn into a flywheel for the model engine I am building. I was thinking of using superglue to secure it to my faceplate as it obviously does not fit in any of my chucks.
Any suggestions how to hold this or should I go looking for someone with a bigger lathe.
Dave
Borneo
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With a live ball bearing center run it up.agains the work piece to help hole it in place. You can also put some holes in the part and boldt it to the face plate. John Mattis
I have a 6" x 1" round piece of aluminum that I need to turn into a flywheel for the model engine I am building. I was thinking of using superglue to secure it to my faceplate as it obviously does not fit in any of my chucks.
Any suggestions how to hold this or should I go looking for someone with a bigger lathe.
Dave
Borneo
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Is it something that ya have to machine to a certain
tolerance or is just something that has to be pretty close to what
yer after ? If there's no tolerance needed drill a small hole in
the center & put a bolt through the hole & tighten it up
with a coupler nut . Then ya can put the coupler nut in the chuck
& go to town . Ya can even. use this method to get it close
& then remount it for the final machining .
animal
On 6/11/24 3:54 PM, John Mattis wrote:
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With a live
ball bearing center run it up.agains the work piece to help
hole it in place.
You can also
put some holes in the part and boldt it to the face plate.
John Mattis
I
have a 6" x 1" round piece of aluminum that I need to turn
into a flywheel for the model engine I am building. I was
thinking of using superglue to secure it to my faceplate as it
obviously does not fit in any of my chucks.
Any suggestions how to hold this or should I go looking for
someone with a bigger lathe.
Dave
Borneo
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One thing I forgot to mention was it might not be possible if it is a cast iron flywheel. I don't think the material was mentioned.
Cast iron typically has a VERY hard surface scale. It requires an initial cut deep enough to get under the scale and the mini-lathe just doesn't have the power (and probably not the strength) for a cut that heavy on a larger part. If you try to "take off a little at a time', the tool bit will tend to just scrape and dull. One workaround is to first grind off the scale.
Charles E. "Chuck" Kinzer
On Tuesday, June 11, 2024 at 03:38:07 PM PDT, Bruce J <bruce.desertrat@...> wrote:
How will the flywheel mount to the engine? Maybe drill a smaller hole where the hub will go and mount it on an arbor to turn it? What do you have to do to it? Any opportunity to clamp it to the faceplate via holes that won’t be there when it’s finished (like if there will be be spokes or a cutout?) even if there aren’t,
I know Clickspring uses superglue a lot but I think 6” x 1” is a little big for that.
On Jun 11, 2024, at 2:56 PM, David James via groups.io <davebjames@...> wrote:
I have a 6" x 1" round piece of aluminum that I need to turn into a flywheel for the model engine I am building. I was thinking of using superglue to secure it to my faceplate as it obviously does not fit in any of my chucks.
Any suggestions how to hold this or should I go looking for someone with a bigger lathe.
Dave
Borneo
--
Bruce Johnson
The less a man knows about how sausages and laws are made, the easier it is to steal his vote and give him botulism.
|
Superglue can work for small parts, but I would not trust it for large. Keep in mind that the tool force on the rim of a 6" disc is SIX TIMES that of a 1" disc. And an interrupted cut could send your part flying. Don't risk ruining your part for an experiment.
I'll add one suggestion for workholding, that of drilling and tapping the backside to hold the part to the faceplate while machining the front and rim. You're likely to have spokes, so much of the material is going to disappear anyway. And once spokes are created other means to mount the part to the faceplate are obvious.
Mike
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I have done thousands of wheels from plate.
I just drill 3 holes for chuck jaw to fit the plate. This way I machine the diameter and bore at same time.
Dave
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On Tue, Jun 11, 2024 at 02:56 PM, David James wrote:
I have a 6" x 1" round piece of aluminum that I need to turn into a flywheel for the model engine I am building. I was thinking of using superglue to secure it to my faceplate as it obviously does not fit in any of my chucks.
Any suggestions how to hold this or should I go looking for someone with a bigger lathe.
Dave
Borneo
|
Any flywheel will obviously have a hole in the middle, and probably a threaded hole. Drill and tap a hole first for 1/4" threaded rod (or whatever you have handy). That, plus the superglue, should hold it. If you can't center the hole exactly without using the lathe, don't worry about it. You can always move it somewhat later on.
For more reach with the tool, here's an adjustable tool post I made years ago for my homemade QCTP. I offset the toolpost about an inch from the Allen screws that attach it to the cross slide, mostly for convenience. But you could make something similar with the tool offset as much as you need to in order to move the tool back to reach the perimeter.
Mike Taglieri
I have a 6" x 1" round piece of aluminum that I need to turn into a flywheel for the model engine I am building. I was thinking of using superglue to secure it to my faceplate as it obviously does not fit in any of my chucks.
Any suggestions how to hold this or should I go looking for someone with a bigger lathe.
Dave
Borneo
|
First. Sorry, I didn't notice "aluminum" in the first post. I would definitely want to do the turning and drilling/boring the center hole in the SAME setup.
The forces on the part will be toward the headstock and in shear. Cementing to the face place should require a very high force to break the shear strength.
If the faceplate is a bit small, you could bolt a piece of something like 1/4" thick aluminum (or steel, or whatever) plate to it. Round, or perhaps even square 6 or 7 inches diagonal. Slightly recessed flathead screws to mount it to the faceplate. Then cement your part to it and you will have more square inches cemented.
You could mount to the faceplate as is and just experiment a little to see if it is strong enough.
Charles E. "Chuck" Kinzer
On Tuesday, June 11, 2024 at 08:58:33 PM PDT, Miket_NYC <mctaglieri@...> wrote:
Any flywheel will obviously have a hole in the middle, and probably a threaded hole. Drill and tap a hole first for 1/4" threaded rod (or whatever you have handy). That, plus the superglue, should hold it. If you can't center the hole exactly without using the lathe, don't worry about it. You can always move it somewhat later on.
For more reach with the tool, here's an adjustable tool post I made years ago for my homemade QCTP. I offset the toolpost about an inch from the Allen screws that attach it to the cross slide, mostly for convenience. But you could make something similar with the tool offset as much as you need to in order to move the tool back to reach the perimeter.
Mike Taglieri
I have a 6" x 1" round piece of aluminum that I need to turn into a flywheel for the model engine I am building. I was thinking of using superglue to secure it to my faceplate as it obviously does not fit in any of my chucks.
Any suggestions how to hold this or should I go looking for someone with a bigger lathe.
Dave
Borneo
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Hi Dave. When I needed to turn a large disk. I used a right hand boring bar, mounted at the back of the 4 way tool post with the cutting edge facing forward. That way I gained extra distance, using standard parts. HTH Ellis While challenging, you can probably do it on the 7 inch lathe. Getting the cutting tool out that far will be a bigger challenge than just holding it. Superglue can be a legitimate method for work holding. Is this a solid flywheel? If not and it has, or will have, some spokes or similar feature you may be able to hold it by bolting through openings with perhaps a little fixturing (little pieces of plate to act as big washers). You can always try on the small lathe. And if it doesn't work out, then find something larger. Usually the "swing" of a lathe is not really a practical diameter to machine, but more as a dimension for something that large on which you are machining a much small feature. But machine a disk is possible. I machined a 16 inch disk on my 12x36 lathe but it had a gap bed permitting an 18 inch swing. And I have machined a 6 inch diameter disk on my 7x16 MicroMark and then made a cut to make it a donut (to ultimately be curved trim pieces for a project), but it was wood, so I don't think that counts. Charles E. "Chuck" Kinzer.
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You could slide the tail stock up with a running centre inserted to help hold the flywheel more safely whilst stuck to your faceplate. Terry UK
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I done for cast iron wheels also used a draw bar through spindle.
Dave
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On Wed, Jun 12, 2024 at 03:34 PM, terry.moore50 wrote:
You could slide the tail stock up with a running centre inserted to help hold the flywheel more safely whilst stuck to your faceplate. Terry UK
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All,
Thanks for all the suggestions.
The flywheel has 4 big holes so I will drill the holes out and mount it on my 4 jaw scroll chuck as suggested by davesmith1800.
Hopefully I can get it turned on my 7x12, if not then I will have to find a bigger lathe.
I think I bit off more than I can chew with this project, my X2 mill is also too small for some of the parts and they have to be done half way then removed and turned.
Anyway it's all in a days fun.
Thanks again.
Dave
Borneo
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Often, there are ways to get around some limitations. A possibly easier setup than the faceplate is to bolt the flywheel to something smaller and then chuck that something into the 4-jaw. Centering a part on the faceplate can be aggravating.
Mike
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I have made wooden fixtures using "T" nuts and a center spud to mount stuff to a face plate. John Mattis
Often, there are ways to get around some limitations. A possibly easier setup than the faceplate is to bolt the flywheel to something smaller and then chuck that something into the 4-jaw. Centering a part on the faceplate can be aggravating.
Mike
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Hope to see photos of work.
Dave
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On Thu, Jun 13, 2024 at 06:03 AM, David James wrote:
All,
Thanks for all the suggestions.
The flywheel has 4 big holes so I will drill the holes out and mount it on my 4 jaw scroll chuck as suggested by davesmith1800.
Hopefully I can get it turned on my 7x12, if not then I will have to find a bigger lathe.
I think I bit off more than I can chew with this project, my X2 mill is also too small for some of the parts and they have to be done half way then removed and turned.
Anyway it's all in a days fun.
Thanks again.
Dave
Borneo
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I have eventually got round to machining the flywheel, I opted for drilling and boring 4 x 40mm holes and mounting it in my 4" x 4 jaw scroll chuck as suggested by davesmith1800. This took a while but turned out ok
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Looks good, David. What's the engine you're building?
Mike
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David James
John Mattis
davesmith1800
