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Re: My project thread
I designed, machined, assembled and tested this chemical ionization electron impact ionizer for a quadrupole mass spectrometer.
304 series stainless steel, nickel screen, machinable ceramic, vespel (properties similar to teflon with less outgassing.) and ruby sapphires.
Our average hardware was 2-56 in that unit and they were assembled absolutely dry so it didn't contaminate the ultrahigh vacuum chambers they were used in for sample testing.
The cleaning process involved eighteen steps beginning with a light percentage phosphoric acid soap scrub to a final bath in heptane after a dance thru the various specific gravities in the solvent list that were done to remove any contaminants.
Cleaner than clean and 304 screws in 304 holes was gall city for sure.
Every blind tapped hole had to be cross drilled for ventilation and there were reamed fits all over it.
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Dabbling in new steels
The cutoff blade holder for my lathe came with a missing clamp, I would normally grab a piece of drill rod to make something like that but that was on the other side of the ocean.
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Here I have to learn all the metals over again as they're similar but different.
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So, I ordered a piece of 20mm diameter ST20 to make this out of.? A simple project, not critical, but will sure make the lathe more useful.
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I think ST20 is like a typical cold rolled steel that I'd get in the USA, but I'm not sure.? Well, as long as it isn't something hard to machine like stainless it should work for this project.
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I have a place within walking distance that sells steel, called Metal Base.? There's also a few more within 5 or so km.? But it's all hot rolled.? Good for some projects, but I wouldn't want to make a tool clamp out of it.
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There's a couple of online shops here (Ozon and Wildberries) that are something like Amazon.? They carry a wide range of stuff and deliver to pickup points, one of which is across the parking lot from where we buy groceries.? So, that's where I'll be getting small quantities of things like this.? For larger quantities, I would have to buy from the regional capitol which is 50 km away.? Either drive there or pay high delivery costs.? I think I'll stick with Ozon for now.
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There's also a few scrap yards around here, I need to visit them more.? Maybe I'll find some good stuff for the projects bin.
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Re: Mini lathe 7 x12 14 8 shop drill press mill wood working sextant clocks gear milling equipment engine tractor rebuilding repair Milling on a Mini Lathe
To me the tiny tee slot is not useful.??
I even on Tiag website to see if they show anything on tee slot nothing.?
It is lessthan ?" [3mm] wide maybe wider.
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I am thinking some very important to spend all that time making a tiny tee slot that is not used. Even on copies
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More photos?
You see no tap hole for a stop on side and tee slot is both sides. The copies of the Tiag Mill ATTACH has the same tee slot
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On Sat, Feb 15, 2025 at 09:13 AM, Bill in OKC too wrote:
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Re: Mini lathe 7 x12 14 8 shop drill press mill wood working sextant clocks gear milling equipment engine tractor rebuilding repair Milling on a Mini Lathe
Clamping an angle plate or stop in place. Bill in OKC? William R. Meyers, MSgt, USAF(Ret.) Aphorisms to live by: Good judgement comes from experience. Experience comes from bad judgement.? SEMPER GUMBY! Physics doesn't care about your schedule. The only reason I know anything is because I've done it wrong enough times to START to know better. Expect in one hand, expectorate in the other. See which one gets full first.
On Friday, February 14, 2025 at 10:49:50 PM CST, davesmith1800 <davesmith1@...> wrote:
Any know how this tee slot use for ?
It about Suze if a #6 screw
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Dave
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Re: Milling on a Mini Lathe
I have tee slot?
It good size maybe for a ? [14mm] bolt.
This one is less than a #5 [4mm] screw just to small even for a stop in my view.?
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I am use to a lot bigger too where using ? bolts and a Bridge Port ? is small.?
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FYI? the smaller size is a lot more fun. Most projects will fit in pencil drawer
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Dave?
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On Sat, Feb 15, 2025 at 03:18 AM, Nitro wrote:
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Re: Mini lathe 7 x12 14 8 shop drill press mill wood working sextant clocks gear milling equipment engine tractor rebuilding repair GPS vs SEXTANT Navigation
¿ªÔÆÌåÓýDepends on your distance from the equator.? Changes in latitude, changes in attitude.On 15-Feb-25 10:28, davesmith1800
wrote:
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Re: Mini lathe 7 x12 14 8 shop drill press mill wood working sextant clocks gear milling equipment engine tractor rebuilding repair Milling on a Mini Lathe
¿ªÔÆÌåÓýThat may be a standard steel shape that they just buy off the shelf.? Like extrusion profiles, only machined. On 15-Feb-25 7:49, davesmith1800 wrote:
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Re: GPS vs SEXTANT Navigation
Try this for time and earth 360¡ã
& try this for time at different Latitudes
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One hour is 1020 miles
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how about one minute
At 0¡ã = 17 miles in minute
at 35¡ã = 14 miles in minute
at 65¡ã = 7.2 miles in minute
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how about one second
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At 0¡ã = 0.28 miles in second
at 35¡ã = 0.23 miles in second
at 65¡ã = 0.12 miles in second.
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35¡ã 0.8192
65¡ã 0.4226
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If your time is off 5 minute 35¡ã you are 70 miles off
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Dave
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Re: Milling on a Mini Lathe
Sites for low
cost milling attachment?
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Walmart?
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Amazon?
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https://www.amazon.com/Vertical-Milling-Slide-Lathe-Machine-Metalworking/dp/B077GP8RN8/ref=asc_df_B077GP8RN8?tag=bingshoppinga-20&linkCode=df0&hvadid=80127036355545&hvnetw=o&hvqmt=e&hvbmt=be&hvdev=m&hvlocint=&hvlocphy=&hvtargid=pla-4583726557729050&psc=1 |
Jerry Durand
davesmith1800
Renaissance 1
Bill in OKC too