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Request to do a small machining job

nyulpista said:
The rod is 3/16 at 4.7mm diameter
Click to expand...
Can you elaborate on what rod you sourced? For example if its drill rod, they are typically ground with stated tolerance +/- 0.0005" My experience is they can vary that much across the axis (elliptical) as opposed to diametric but now we are getting into the weeds. Its pretty good stuff. But if you bought nominal stock of pretty much anything else, all bets off.

1749221541285.png



Just eyeballing the size/fit I'd aim for something like 0.0005" diameter over shaft size but for this purpose could even be a bit more, say 0.001".

Class III Medium Fit Tolerance Chart for Holes and Bolts

Medium running fits - tolerances are intended for higher running speeds, or heavy journal pressures, or both.
www.engineersedge.com
 
Having picked up most of my engineering skills in a metric environment I sympathise with the metric / imperial conversion pitfalls.

I find it fascinating that our Canadian weather forecasts can resolve predicted wind gusts down to 10m per hour accuracy. How about 96.56 km/h as seen on the Weather Network? Makes much more sense as the original 60 mph swag.

Totally agree with philipFROM-PNW. In fact I'd go further and propose the FFF system of units going forward. That way we can at least all be equally confused: https://en.wikipedia.org/wiki/FFF_system
 
All of my schooling as well as my first engineering job were based on the mixed Imperial / US standards of measurement. At the time, I thought gallons, Quarts, and ounces were too complicated and confusing. Little did I know that the metric system would soon run me over.

I remember a young engineer ordering a tiny little hook for a trunk tie-down that arrived on a flatbed and need a forklift to unload it. We laughed for months about that one. The construction industry in Canada is still not really metric. I still buy 2x4s, 4x4s and 4x8 sheets of drywall and plywood. One of the first metric sky scrapers in Canada needed costly custom windows because metric windows were simply not available. I seem to recall that the supplier went bankrupt over that one and nearly took the GC with them.

My wife gets her weather in Imperial and I get mine in metric. I had to laugh at @Manfred's wind speeds.
 
@nyulpista , looks like I need to introduce myself! I'm south of Aylmer 6 mins, I hosted a meet & greet here last April, have a lathe and mill that are up to the task, I have a few cutters that could be sharpened to a specific profile for your 12ga wire. for those interested, ALL wire is exact in radial dimensions as any irregularities would be a point of extra heat and burn up at the thinner spots, so wire has to be in a very close spec! Sounds like you may have more skills than I do, and if you're comfortable with my equipment you're welcome to come by here and see what You can spin out yourself!! let me know if I can be of help! I have a chunk of yellow brass about 40 mm in diameter if that would suffice,
 
grease monkey said:
@nyulpista , looks like I need to introduce myself! I'm south of Aylmer 6 mins, I hosted a meet & greet here last April, have a lathe and mill that are up to the task, I have a few cutters that could be sharpened to a specific profile for your 12ga wire. for those interested, ALL wire is exact in radial dimensions as any irregularities would be a point of extra heat and burn up at the thinner spots, so wire has to be in a very close spec! Sounds like you may have more skills than I do, and if you're comfortable with my equipment you're welcome to come by here and see what You can spin out yourself!! let me know if I can be of help! I have a chunk of yellow brass about 40 mm in diameter if that would suffice,
Click to expand...
Hi grease monkey,

Thanks very much for responding to my post and for the intro. Kind offer, thank You! Working on a proper lathe would be refreshing and if you do not mind, I would love to take you up on this offer. I have to admit that just this afternoon I eked out two little contact pulleys on a wobbly and dangerous machine. I even had to grind cutting tools for it, see pictures below. All old school... Yes, I made them from a brand new flat file from Home Hardware this morning...
20250607_120343.jpg
20250607_120314.jpg

20250607_160447[1].jpg

This gets me going with my test, but I could not actually finish what I had set out to do.

Would you please let me know of the best time to visit your shop? Any time and day would be OK.

Thanks again!
Steve
 
PeterT said:
Can you elaborate on what rod you sourced? For example if its drill rod, they are typically ground with stated tolerance +/- 0.0005" My experience is they can vary that much across the axis (elliptical) as opposed to diametric but now we are getting into the weeds. Its pretty good stuff. But if you bought nominal stock of pretty much anything else, all bets off.

View attachment 65590


Just eyeballing the size/fit I'd aim for something like 0.0005" diameter over shaft size but for this purpose could even be a bit more, say 0.001".

Class III Medium Fit Tolerance Chart for Holes and Bolts

Medium running fits - tolerances are intended for higher running speeds, or heavy journal pressures, or both.
www.engineersedge.com
Click to expand...
Hi Peter,
I bought the rod in question at Home Depot. It is their regular 3/16" stainless steel and the other is the same size brass piece. Interestingly, they are not the same diameter. The brass one is 4.74mm and the stainless steel rod is 4.71mm. Not a big difference and a 4.8mm drill will work for my purposes, if I can find one...
 
Manfred said:
Having picked up most of my engineering skills in a metric environment I sympathise with the metric / imperial conversion pitfalls.

I find it fascinating that our Canadian weather forecasts can resolve predicted wind gusts down to 10m per hour accuracy. How about 96.56 km/h as seen on the Weather Network? Makes much more sense as the original 60 mph swag.

Totally agree with philipFROM-PNW. In fact I'd go further and propose the FFF system of units going forward. That way we can at least all be equally confused: https://en.wikipedia.org/wiki/FFF_system
Click to expand...
It seems just a microfortnight, since I last read read this post . . .

microfortnight One Thousandth of a Fortnight
Manfred said:
Having picked up most of my engineering skills in a metric environment I sympathise with the metric / imperial conversion pitfalls.

I find it fascinating that our Canadian weather forecasts can resolve predicted wind gusts down to 10m per hour accuracy. How about 96.56 km/h as seen on the Weather Network? Makes much more sense as the original 60 mph swag.

Totally agree with philipFROM-PNW. In fact I'd go further and propose the FFF system of units going forward. That way we can at least all be equally confused: https://en.wikipedia.org/wiki/FFF_system
Click to expand...
Well it seems like just a MicroFortnight, since I last read this thread . . . ;-)

And of course we all know that amount of TIME is 86.4 seconds, Give or take an inch, 25.4mm for those that are Imperially Challenged, we must not use the word Disabled, that is crass, one Might get away with Differently Abled, depending if your Awake, or Woke!!

. . . . grabbing my cane and hobbling off the floor, EXIT, Stage WRIGHT.

philip, from PNW, USA

"TRUTH DOES NOT require Applause, it only requires
Survivors."

~Dan Bongino

(knot wet wright now it is late spring Almost SPRUNG)
 
Manfred said:
Having picked up most of my engineering skills in a metric environment I sympathise with the metric / imperial conversion pitfalls.

I find it fascinating that our Canadian weather forecasts can resolve predicted wind gusts down to 10m per hour accuracy. How about 96.56 km/h as seen on the Weather Network? Makes much more sense as the original 60 mph swag.

Totally agree with philipFROM-PNW. In fact I'd go further and propose the FFF system of units going forward. That way we can at least all be equally confused: https://en.wikipedia.org/wiki/FFF_system
Click to expand...
It seems just a microfortnight, since I last read read this post . . .

EDIT, I had one to many BEARS last night so I Korrect myself:

microfortnight One Thousandth of a Fortnight Oar, 1,209,600÷1,000 Weight a Minutia, I need more COFFEE

philip, from PNW USA, exit Stage Wright hobbleing with his cane at One furlong per fortnight
 
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Susquatch said:
Holy smokes!

If I were you, I'd worry less about how many beers you had last night and worry more about how much whisky you had this morning! Whew!
Click to expand...

Well now, would you think Different of me if'n I told you I haven't had even a Sip of Alcohol since November of '89 ???

One could think several different DiRECTshuns in that,

° What a Hangover
° poor fellow done lost his Marbles . . . .

But the reality of that Jest was, I saw a Dan Bongino U Tube (Last NIGHT) where he was wearing a Custom Made TEE SHIRT, saying something about "Forget Arming the BEARS, watch out for the RED NECKS" . . . them folks Bare their Arms, Especially those that TATTO themselves with >>>2a<<< ! ! ! ! ! ! ! OH, the quote was on an Armless BEAR :-)

But, unmentioned in my "intro" I used to do some GunSmithing in that Metal Working category

Here in my area we do have a (real) BEAR problem, Cereously, the hunting restrictions on those critters: TRUE STORY here: I had a friend who'se HOUSE was a two story affair, first floor built into a hill, Solid Concrete, sort of Shop & Garage, indoor Stairs & EVERYBODY entered the house that way.

He was Norwegion (RIP), and was Positive he REQUIRED a second Cup of COFFEE to wake him up.

HE was making that second Cup, When he heard a KNOCK on the Exterior DOOR, NO ONE used that rickety old set of stairs, so he walks over unlocks the Door, opens it up . . .

THERE looking at Him was 250# of Brown BEAR.

He closed the DOOR, picked up his (LOADED) 30-30, shot that BEAR Pumb Dead Right THERE!

He set the Winchester down . . . . WENT over to the Phone and called WORK, "I'll be late coming in, I gotta SKIN my BEAR" . . . .

NOW, a fellow just Can Not make UP stories like that, InTOX-e-K8ted can he?

I have so many TRUE STORIES like that, I should write them ALL Down ;-)

philip from Baja Canada . . . . just a bit South of the Canadian Border

"Truth does not need Applause, it only needs
SURVIVORS."

~Dan Bongino, former Secret Service, former Instructor for Secret Service, and One MEAN fellow . . . just say "yes Mr. Bongino" and "No SIR Mister BONGINO" . . .

I need to make some more Coffee . .

BFN
 
philipFROM-PNW said:
Well now, would you think Different of me if'n I told you I haven't had even a Sip of Alcohol since November of '89 ???

One could think several different DiRECTshuns in that,

° What a Hangover
° poor fellow done lost his Marbles . . . .

But the reality of that Jest was, I saw a Dan Bongino U Tube (Last NIGHT) where he was wearing a Custom Made TEE SHIRT, saying something about "Forget Arming the BEARS, watch out for the RED NECKS" . . . them folks Bare their Arms, Especially those that TATTO themselves with >>>2a<<< ! ! ! ! ! ! ! OH, the quote was on an Armless BEAR :-)

But, unmentioned in my "intro" I used to do some GunSmithing in that Metal Working category

Here in my area we do have a (real) BEAR problem, Cereously, the hunting restrictions on those critters: TRUE STORY here: I had a friend who'se HOUSE was a two story affair, first floor built into a hill, Solid Concrete, sort of Shop & Garage, indoor Stairs & EVERYBODY entered the house that way.

He was Norwegion (RIP), and was Positive he REQUIRED a second Cup of COFFEE to wake him up.

HE was making that second Cup, When he heard a KNOCK on the Exterior DOOR, NO ONE used that rickety old set of stairs, so he walks over unlocks the Door, opens it up . . .

THERE looking at Him was 250# of Brown BEAR.

He closed the DOOR, picked up his (LOADED) 30-30, shot that BEAR Pumb Dead Right THERE!

He set the Winchester down . . . . WENT over to the Phone and called WORK, "I'll be late coming in, I gotta SKIN my BEAR" . . . .

NOW, a fellow just Can Not make UP stories like that, InTOX-e-K8ted can he?

I have so many TRUE STORIES like that, I should write them ALL Down ;-)

philip from Baja Canada . . . . just a bit South of the Canadian Border

"Truth does not need Applause, it only needs
SURVIVORS."

~Dan Bongino, former Secret Service, former Instructor for Secret Service, and One MEAN fellow . . . just say "yes Mr. Bongino" and "No SIR Mister BONGINO" . . .

I need to make some more Coffee . .

BFN
Click to expand...
speaking of fellows with big guns... you need to search a Ytube video titled, "My 50 cal exploded" by Kentucky Ballistics, and give that a gander... He... is the definition of 1 tough character! long story short, he acquires a military super hot slap round and gives it a tap through his Serbu firearms 50BMG, and brother, it is an absolute miracle he survived... these have a screw on cap on the breach, it ripped the threads off and hit him in the face, fracturing the orbital bone in 3 places, and an ear that supports that cap when closed got ripped off by that cap and pierced his neck just right of his adams apple and proceeded downward severing his jugular AND collapsing his right lung! !@#$holy crap!!!!! amongst other things, he lived through that, and he recorded a video 2 wks after that incident. hand held 50 cals are designed to withstand upwards of 55,000 psi barrel pressure, what they think transpired it had tried to contain 165,700 psi of pressure!!! 1 spicy round!
 
GREASE MONKEY!

I'll search for that tonight!

Back when . . . Well "in the Last Century" . . . . I belonged to a forum like this, Only everything was MAKING GUNZ. Seperated areas of interest . . . Including sections on making Black Powder, and rebuilding DE-Certified Military weapons, FULL AUTO cut in parts, you remake the parts, and have a legal action, after your paper work . . . you can modify trigger groups to become Semi Auto, and have one of the best Machined designs, No Longer Available . . . but I Digress.

I followed one man's passion, now remember, some of this is like >>>IIRC<<< , well he was making a Super Magnum, Ultra Big, Single Shot Bolt Action RIFLE.

It was based OFF regular 50 cal BMG cases, "fire formed" to remove any of the neck & Taper >>>IIRC<<<

FIREFORMING for those with less knowledge on the topic, RESHAPES a necked cartridge into something else, and it has been done since Brass Casings were used in Rifles. but thats another story.

Researching of America's "Strange Laws" und our BATF&E, xy&z, he realized that a Single Shot 78 Caliber Rifle would be LEGAL! ;-)

It was fired cartridges, lathed and threaded base, which received a new base a "Rimmed Cartridge out of a semi-rimmed". These cartridges were Reformed to basically become >>>IIRC<<< 3.500"(?) long, 78 Caliber, and the PROjectile weighed Well my humor wants to say a Pound of lead, but I will only say it weighed enough to kill DRT, "Dead Right There", a T-Rex Dinosaur, or similar creatures.

The project was 4+Years in making, but when he got the whole thing up and running, Well I think the Kick of that would make a Mule seem like a Rabbit's Foot ! ! ! ! !

He did Ballistic Testing, "had the chamber" >Proofed< English gun technoledgy term, the Steel will hold the Charged Cartridge, WITHOUT sharpnel explosions, THIS was a very Science Based gunsmither here, who basically wanted a 90mm Shoulder Fired RIFLE, but could not by it, the actual Metrics of a 78 caliber is 19.812mm . . . . But recall for your Mental pleasure:

The world's ARMY'S have had 60 & 80mm MORTAR rounds for almost a century, and at 78 cal, he is putting a Long Barreled Mortar upon his shoulder, and pulling the trigger . . . . . . . . .


. . . . .


. . . . .

I paused to reflect.

Damn, that HURT, after pulling the trigger!

philip, from the Great Pacific NorthWET, Oregon, USA


"The Truth spoken softly, is LOUDER . . . .
. . . . . . . . than the Lies that are SHOUTED."
 
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you'll like Scott then, from Kentucky Ballistics! he's got some of the biggest guns I've never heard of, 500 magnum, 700 nitro, and a 4bore, yup, its shoots a 1" round shell!!!
 
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