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Re: 3-jaw largest bore?
You can but Hou have take chuck apart and find out how mush
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Dave? On Sat, Jun 1, 2024 at 03:40 PM, MikeK wrote: I seem to remember some years ago someone had increased the through-bore of the standard 3" 3-jaw chuck, but I can't remember where and didn't find anything in my search.? It may have been toolsandmods.com, but that site appears to be defunct now. |
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Re: Project New type of material
It could take longer with heat wave.
My wife and Doctors do not want meb work heat.? Whe new lathe last November I wanted to know from Doctor what diet I should to live 20 or 30 years longer. Thinking it was going to green flufy with a drill flavor shake with hit of mint.? So ask the question.? How long can live with stage 4 cancer.? Thd doctor replied? No one makes pass 10 years. It took me a few seconds to respond with. I was diagnosed with stage 4 in 2009.? The doctor respond with I know. At that point I realized the Green Fluffy Deit did not work. I check with other doctors and Americans Cancer they said about same thing.? So now everyone think I going to brake.? So that is why it taking so long to work with my new lathe Dave? |
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Re: 3-jaw largest bore?
I too have collets, but I also purchased a 4 inch 3 jaw from little machine shop that I mostle use. Regards, John Mattis (retired mechanical engineer On Sat, Jun 1, 2024 at 4:28?PM John Los via <iron2old=[email protected]> wrote: I bored my 3" chuck out to 3/4". I no longer use the chuck very often, as I do most of my work with collets now.? Looks like 13/16" would work, but it looks like you would cut into the heads of the 3 little screws the hold the plastic disk in the back of the chuck.? ----- John |
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Re: 3-jaw largest bore?
You can bore the 3 inch 3 jaw out to 0/760 diameter so 3/4 inch stock will pass through John Mattis (retired Mechanical engineer) On Sat, Jun 1, 2024 at 3:40?PM MikeK via <upand_at_them=[email protected]> wrote: I seem to remember some years ago someone had increased the through-bore of the standard 3" 3-jaw chuck, but I can't remember where and didn't find anything in my search.? It may have been , but that site appears to be defunct now. |
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Re: Project New type of material
Do have delays in work .
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Yesterday it was replacing flush valve.? Today is blood and seed for lawn .? I hope do try a cut today. The other is health I have stage 4 colan cancer since 2009. FYI I told in 2009 I have stage 4. The treatments makes me tired.? I have had 106 chemotherapy treatments.? Now on a new out in November 28 2023 drug call? FRUZAQLA.? I did post my wife's? deit on American Cancer so all know what did.? Dave? On Thu, May 30, 2024 at 08:43 AM, Ralph Hulslander wrote:
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Re: Project New type of material
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Just a advice.
One of you have big experience with Plexiglas: use super sharp tool.
I have no experience with plexiglass, however, I have now done a lot of positive cutting with this tool :
It is mostly made for internal use; however, I use it for outside cut. You can get it from 3 to 8 mm.
I have made a lot of 1 mm , 1 cm long pivots from 2 mm cheap steel in my clockmaker lathe.
The 8 mm tool fit very good in your 7x12 lathe.
And they are super sharp.?
/johannes
From: [email protected] <[email protected]> on behalf of Charles Kinzer <ckinzer@...>
Sent: Wednesday, May 29, 2024 1:17 PM To: [email protected] <[email protected]> Subject: Re: [7x12MiniLathe] Project New type of material ?
I have machined a lot of plastic.? I favor HSS tools that are VERY sharp.
I also keep a diamond hand hone at the ready to further sharpen a bit after grinding, and to touch up the edge from time to time when turning.? I feel using the hone is a key to success.? It is important to have a very sharp
tool bit.
Plastics can contain a lot of impurities causing them to be somewhat abrasive and dull a tool bit faster than even cutting metal.? Sometimes the bit dulls much faster.? That will make problems as you want a very sharp tool
bit.? So, check sharpness often.
Watch out for too much speed and too much heat.? And watch out for too much feed rate or the tool bit might just dig in and jam or tear the part loose.
Did I mention that you want a very sharp tool bit?
Be careful that the tool grind shape doesn't cause stringy chips that can get caught between the face of the tool and the workpiece and mashed back onto the surface.? If this happens, they can get sort of welded back on to
the surface.? (Stringy chips are a dangerous practice in any case.)
Practice a little if you have material to spare for that.? You could also practice on something else, like cheap PVC pipe, although it probably won't behave exactly like Plexiglas.
Charles E. "Chuck" Kinzer
On Wednesday, May 29, 2024 at 11:44:29 AM PDT, davesmith1800 <davesmith1@...> wrote:
Just plexiglass rod for making game pieces from.
First time turning plexiglass? All my life has been metals. Any comments? Dave? |
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Re: Project New type of material
I have machined a lot of plastic.? I favor HSS tools that are VERY sharp. I also keep a diamond hand hone at the ready to further sharpen a bit after grinding, and to touch up the edge from time to time when turning.? I feel using the hone is a key to success.? It is important to have a very sharp tool bit. Plastics can contain a lot of impurities causing them to be somewhat abrasive and dull a tool bit faster than even cutting metal.? Sometimes the bit dulls much faster.? That will make problems as you want a very sharp tool bit.? So, check sharpness often. Watch out for too much speed and too much heat.? And watch out for too much feed rate or the tool bit might just dig in and jam or tear the part loose. Did I mention that you want a very sharp tool bit? Be careful that the tool grind shape doesn't cause stringy chips that can get caught between the face of the tool and the workpiece and mashed back onto the surface.? If this happens, they can get sort of welded back on to the surface.? (Stringy chips are a dangerous practice in any case.) Practice a little if you have material to spare for that.? You could also practice on something else, like cheap PVC pipe, although it probably won't behave exactly like Plexiglas. Charles E. "Chuck" Kinzer
On Wednesday, May 29, 2024 at 11:44:29 AM PDT, davesmith1800 <davesmith1@...> wrote:
Just plexiglass rod for making game pieces from. First time turning plexiglass? All my life has been metals. Any comments? Dave? |
davesmith1800
John Mattis
GadgetBuilder
Johannes