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Re: My project thread

 

Technically the old gal is 120 years young.
She was actually put in service in 1905, but was only in service until about 1985 before we got a hold of her.
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Re: My project thread

 

¿ªÔÆÌåÓý

only 80 years old?? They don't make them like they used to.? ?

Good work keeping this old stuff alive, more people need to know how things work other than asking your phone to do it for you.

On 16-Feb-25 23:21, Nitro via groups.io wrote:

This is called a mixer valve.
It's function is to mix natural gas with the air intake charge to fuel the engine.
The replacement valve assembly was made out of 12l-14 free machining steel with a 6061 T6 poppet.
I figured that the aluminum was an ok choice because technically this engine only runs about 40 hours a year now.
The valve stem bore is being opened up on a Bridgeport vertical to accept the larger diameter replacement I made.
The 80+ years it was in active service finally wore it completely out.
The pintle in the original photo trashed the bore in the housing until the poppet broke off of it and shut the engine down.
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It's really cool to be an active member in our Association and to have the skills required to keep as much of it alive as possible.
The flywheels on this puppy are about 7 feet in diameter.
We use a Farmall M tractor to fire it up because the air starter got away from it decades ago.
Re: My project thread

 

This is called a mixer valve.
It's function is to mix natural gas with the air intake charge to fuel the engine.
The replacement valve assembly was made out of 12l-14 free machining steel with a 6061 T6 poppet.
I figured that the aluminum was an ok choice because technically this engine only runs about 40 hours a year now.
The valve stem bore is being opened up on a Bridgeport vertical to accept the larger diameter replacement I made.
The 80+ years it was in active service finally wore it completely out.
The pintle in the original photo trashed the bore in the housing until the poppet broke off of it and shut the engine down.
?
?
It's really cool to be an active member in our Association and to have the skills required to keep as much of it alive as possible.
The flywheels on this puppy are about 7 feet in diameter.
We use a Farmall M tractor to fire it up because the air starter got away from it decades ago.
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

 

I did the Latitude adjustments just not labled.
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Thank you?
Dave?
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At Latitude 0¡ã = 17 miles in minute
At Latitude = 14 miles in minute
At Latitude 65¡ã = 7.2 miles in minute
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At Latitude 0¡ã = 0.28 miles in second
At Latitude 35¡ã = 0.23 miles in second
At Latitude? 65¡ã = 0.12 miles in second
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On Fri, Feb 14, 2025 at 11:35 PM, Jerry Durand wrote:

Depends on your distance from the equator.? Changes in latitude, changes in attitude.

On 15-Feb-25 10:28, davesmith1800 wrote:
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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ER40 Collet Holders, Use on Mill,Lathe.Drill Press

 

Re: My project thread

 

¿ªÔÆÌåÓý

Nice looking wire wheel and great that it's mostly used parts.

Back before the "foreigners can't teach kids" ruling we were showing how to repair and make things.? Started with helping a retired teacher fix her broken flower stand as her first time welding.

Apparently caused quite a stir, kids realizing you can fix things instead of buying new.
Re: My project thread

 

Found this rusted up crusted up grinder pedestal and decided it needed a new lease on life.
After disassembly, the cast iron parts were re-machined to clean them up, the pedestal casting was glass beaded then refinished then a 1/4 horsepower water pump motor was selected to drive it.
The 6061-t6? aluminum motor pulley was machined to match the new v-belt sourced from Ebay.
Hardwood was chosen from our onsite sawmill for the base.
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This was built as a functional piece of equipment with the added bonus flair of fitting into our vintage shop setting at the Machineworks.
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Re: My project thread

 

Silly project
The 20mm projectile was machined out of a part of a scrapped candlestick holder and a stainless steel bolt
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Re: My project thread

 

Replacement oversized poppet valve stem for a 1905 Bessemer natural gas fired pumping engine.
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Re: My project thread

 
Edited

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ER32 collet chuck mods to enable it to be mounted to a milling table or an angle plate.
The 8mm holes were enlarged to accept the 3/8 inch hold down hardware for our Diamond 22 horizontal.
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ER32 collet chuck on a Morse #2 shank.
The 2-3 adapter was turned straight on the OD then ground true with my Dumore toolpost grinder.
The straight shanked adapter allows me to mount the collet chuck in a Buck adjustru? lathe chuck.
The #2 shank allows use of the collet chuck on any number of my machinetools equipped with Morse tapers.
Re: My project thread

 

I first was looking at mini lathe in 2005. Use making bushings for portable line boring work { in field } because it is light weight.? Because help reasons it did not happen. .?
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For me it fun work?
Here a few photos off internet.?
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Dave

Re: Milling on a Mini Lathe

 

Here a few more photos of Tiag mill Attachment.?
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Re: My project thread

 

It is indeed. I've got an older MicroMark 7x14 that I'll drag out of storage when I move into an apartment that isn't so tiny. I mostly use the larger lathes we have at work, because I'm not quite so limited in terms of spindle bore capacity. We have indeed talked, and you're doing great work, Dave.

Doug


On Sun, Feb 16, 2025 at 1:34, davesmith1800
<davesmith1@...> wrote:
The mini lathe is great for gunsmith? work.
The mini lathe can have a full length tapper attachment.? It work like tapper attachment from 1900.?
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I have talk to you pass about your name? Hi again Dave?
Re: My project thread

 

The mini lathe is great for gunsmith? work.
The mini lathe can have a full length tapper attachment.? It work like tapper attachment from 1900.?
?
I have talk to you pass about your name? Hi again Dave?
Re: My project thread

 

Most of what I do is Gunsmithing work.

Doug


On Sat, Feb 15, 2025 at 17:06, Nitro via groups.io
<nitroburners@...> wrote:
Laughs, I hear ya, however, we are still talking a hand drill mounted to a boring bar holder if we are going to split hairs? grins~~~~
Re: Dabbling in new steels

 

Someone told me one time she thought machine shops were the most wasteful industry ever because we made stuff out of stuff after throwing some of it away.
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I guess no one ever told her that we seldom scrap material that we can still make something else out.
We were probably recycling things after the first time we scrapped something.
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Re: My project thread

 

Laughs, I hear ya, however, we are still talking a hand drill mounted to a boring bar holder if we are going to split hairs? grins~~~~
Re: My project thread

 

¿ªÔÆÌåÓý

If the tooth on the end of the bolt is ground to one side at one half gear pitch, you now have a 120 tooth gear by rotating the bolt.

On 16-Feb-25 0:43, Nitro via groups.io wrote:

Logan 922 mods.
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Command center with an added shop built spindle indexing rig.
The control support was designed around existing holes for a collet closer assembly and used the clearance notch in the gear cover so when the rigging was removed, you can still close the cover.
A 60 tooth gear offers quite a few spacing options for a spindle and combined with my cross and end drilling rig, gives me many options to use it for.
The Hall effect tachometer is essential for optimizing cutting surface speeds controlled by my inverter.
Re: My project thread

 

Logan 922 mods.
?
Command center with an added shop built spindle indexing rig.
The control support was designed around existing holes for a collet closer assembly and used the clearance notch in the gear cover so when the rigging was removed, you can still close the cover.
A 60 tooth gear offers quite a few spacing options for a spindle and combined with my cross and end drilling rig, gives me many options to use it for.
The Hall effect tachometer is essential for optimizing cutting surface speeds controlled by my inverter.
Re: My project thread

 

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