Tom, DoAll made a sine bar called a Second/Tenth Bar. The center distance was 20.62664" which provided exactly one second arc change per .0001" of gage block build up. Pretty cool.
I want to thank you for the remote mic. Please encourage your fellow tubers to do the same thing. It helps us guys that have hearing problems. Thanks, Bill
As you're talking, I find myself nodding my head in agreement, saying things like "yup, I found that out, too." "That's my experience, too." etc. Thanks for the great video. John P.S. Love the sound effects. They crack me up.
I just picked up the same ElectroLimit at a a barn sale. I thought it might be something interesting to send you. It already had the electronics removed so its cool to see what it was supposed to look like. It also has a larger serrated work surface that looks original.
Wow, small world... my dad worked for Wolter's from 1975 to 1989. He used to bring home lapped diesel injetor needles to use as center punches :) The best story he haver had was when they had to figure out that a nigh watchman was using a wafer lapping machine as a can crusher
Hi Tom, Those Vee Anvil Mics are indispensable in checking for roundness in centerless ground parts. If the centerline of the piece you are grinding is below centerline of the grinding and regulating wheels, you tend to get an out of round condition that can't be detected with regular mics. Like a Reuleaux triangle.
My EMCO V10 lathe has a milling head that uses a round column similar to that metrology device you showed, having an acme lead screw down the side and a similar clamping mechanism
It's amazing how machining technology built on itself. Every time someone needed an improvement to their tools or machinery, they built it with their tools or machinery.
I'm really looking forward to your loaf on optical flats, I've always been curious about them & how to read them. Anyway, another interesting loaf Tom.Regards - Pedro.
With a recent experience with commercial shoulder bolts, I was disappointed to find that the threads are not necessarily concentric with the ground cylinder
The granite sine bar also appears to have the two rolls on different levels, on a tangent line not parallel to the "work holding" surface. Don't know why, perhaps so a standard gage block (or something more interesting?) could be a primary space block contacting sine bar and surface plate? Or maybe so it can achieve negative angles? Anyway, that changes the base distance a bit from what the roll to roll center distance measures.
I think you'll find that magnetic transfer block (we just called them magnetic parallels) handy for when you need to grind stuff really flat and parallel. Dress the wheel, set the block on the grinder, dust it off,_ DO NOT TURN OFF THE CHUCK_, wipe clean, set part and grind. Holding spacers for precision spindle bearings at .00005 or less was a piece of cake. Dusting off the block every time you use it gives you the flattest surface you can get on your grinder. I've got a few in my box plus angles from 1,2,3,4,5,10,15,30 and 45 I my box.
If that's an LVDT it uses AC voltage to do the measurement. You aren't seeing much on your multimeter because it's in DC mode. Thanks for your videos! I love the ones on lapping. Best, Jacob
Tom, it would be so cool to see a video on airy and bessel points. Like how long/thin a piece of metal needs to be before we can actually see a measurable deflection. (Like, you wouldn't see measurable deflection in a 3"(W)x6"(H)x16"(L) piece of steel that's stood up on the 3" side. Maybe you could detect it with your electronic gear, but when would we be able to detect a deflection.) Thanks Tom!
Tom, The copper hammer is especially created for use in the machine shop. Most machine work involves things being square and thus a nice square head hammer is essential. However in a pinch you can hammer home square head nails with it! :-) If your surface grinder goes "bloop-bloop bloop" you need to dress the wheel!!! LOL Eric
Is the application for a non spark situation, where there are combustible gases, maybe inside storage tanks. I don't know it it is copper or brass tools that I'm thinking of.
bjr E. WA. It would definitely work for that. Copper, brass, bronze, and lead are all used for non sparking depending on the job requirements. I've got a 10# copper sledgehammer in my collection, still haven't caught up with the Ox in numbers though...
One tip on grinding tool bits in the surface grinder. The set-up is sweet but you are better off to have the top of the tool against the fixture side. Makes it really hard to accidently crash into the fixture that way. Just don't ask how I know this
Some neat stuff Tom. That German hammer looks like a real whacker it will get the job done and soon and if it does not you only need add an Abom sized Bozo on the handle.
Hey Tom, very interesting. I've seen that type of clamping, it's used on the alum carbs on small RC nitro engines to position the carb for the linkage so you don't mess the carb body. Are you sure the bottom of the Alina didn't come out of a old car( radio ) lol, yes I'm that old too. What Fluke meter do you have? I have a 87 I used when I was a auto tech, they are great meters. God Bless Ya Dave
Tom do you grind the magnetic spacer for the grinder to clean it up? That would mean grinding brass and the steel pins . I have seen all kinds of cool spacers for sale yet never bought any and so I am curious how you would clean it up.
Tom: the loading of the DVM across the meter is probably throwing things off... remember "any measurement disturbs the item attempted to measure" etc.. Thanks Tom Brian AKA GUSMIX on hear.
It's nice Tom to always see what you have for us. I would enjoy a video on scrounging for tools, machines, and good solid repeat business . Tell us earthlings how to master these kinds of things to increase American mfg and to help people improve our lives through using your knowledge to support ourselves better when we get old or for the young fellow wanting to make it. You might be helping someone greatly even saving marriages with better skills to make money in the trade we all love.
That brass hammer comes in different weights. The 1000 gram is $132 on Ebay plus $15 for shipping from England. For me, there are some things not worth buying and this hammer is one of them.
Looking forward to the compound angle setup instruction. One of the other better-known RUclipsrs stepped into the compound angle oversimplification trap a couple weeks ago and got called out for it in the comments (not gonna say who, doesn't matter). For small angles, it's no biggie but if you need to know, then you gotta do some math to get it right.
I don't think your odd length sine plate is odd length. I think it is metric. 21 5/8"*25.4 mm/inch =249.275mm. Pretty close to 250mm, which would make sense.
I believe that the electronic indicators work on the principle of impedance; meaning you basically have a ferrite core moving in a coil, which changes the impedance. It does not make sense to try to measure a DC voltage over this system. Maybe someone who knows about electronics can shine a light up here?
Hi Fernand, The coils are actually dual wound coils with an iron core. No moving parts. I think they behave like little transformers. The electronics in the base measures the phase shift between the two opposing transformers. There are no moving parts other than the indicator arm. Might be fun to tear it down and examine the entire system as I don't have a good feel for the subtleties of how it works. Thanks for the comment. Cheers, Tom
Tom i think you will agree with me while we can do it quicker smaller finer farther, the old ways are still just as close to being black magic for their time today. Thanks for sharing
Tom; Thanks for mentioning me in your video. I'm glad you liked the idea about the confounded angles. Mark
looking forward to your compound angle series
Tom, DoAll made a sine bar called a Second/Tenth Bar.
The center distance was 20.62664" which provided exactly one second arc change per .0001" of gage block build up. Pretty cool.
I want to thank you for the remote mic. Please encourage your fellow tubers to do the same thing. It helps us guys that have hearing problems. Thanks, Bill
Cool grinder fixture.
You always find some interesting tools. Thanks Tom.
Those granite items were very cool Tom. I saw your instagram post on the angle plate for making the threading tool...thanks for going over it
Very interesting crate of goodies.
Looking forward to the compound angles movie feature.
Thanks for sharing Tom
GREAT VIDEO !!
EVEN LEAD HAMMERS DENT STEEL -- EVENTUALLY !
P.S. WHEN PLUGGING IN " CRUNCHY CORDS " -- JUMP OFF THE GROUND !
:-) :-) :-) :-) :-) :-) :-) :-)
Interesting.. Lapmaster is about 10 mins from me. Great video as always.
Thanks!
Marc
As you're talking, I find myself nodding my head in agreement, saying things like "yup, I found that out, too." "That's my experience, too." etc.
Thanks for the great video.
John
P.S. Love the sound effects. They crack me up.
Great work Tom, always lots to learn from your videos.
I just picked up the same ElectroLimit at a a barn sale. I thought it might be something interesting to send you. It already had the electronics removed so its cool to see what it was supposed to look like. It also has a larger serrated work surface that looks original.
Wow, small world... my dad worked for Wolter's from 1975 to 1989. He used to bring home lapped diesel injetor needles to use as center punches :) The best story he haver had was when they had to figure out that a nigh watchman was using a wafer lapping machine as a can crusher
Always interesting information from your channel
Hi Tom,
Those Vee Anvil Mics are indispensable in checking for roundness in centerless ground parts. If the centerline of the piece you are grinding is below centerline of the grinding and regulating wheels, you tend to get an out of round condition that can't be detected with regular mics. Like a Reuleaux triangle.
My EMCO V10 lathe has a milling head that uses a round column similar to that metrology device you showed, having an acme lead screw down the side and a similar clamping mechanism
Hoping you have a great time at the Bash!
used same Alina meter in measuring coil steel thickness on Littel coil shears in can manufacturing tips were polished diamonds
It's amazing how machining technology built on itself. Every time someone needed an improvement to their tools or machinery, they built it with their tools or machinery.
That Pratt and Whitney stand certainly is beefy. I enjoyed the meatloaf full of goodies.
Tasty meatloaf Tom, enjoyed!
ATB, Robin
I love your meatloaf, glad it's never the same!
I'm really looking forward to your loaf on optical flats, I've always been curious about them & how to read them. Anyway, another interesting loaf Tom.Regards - Pedro.
Hi Tom. Have you checked to see if the anvil on the Pratt Whitney stand won't fit your CEJ comparator stand? They look very similar.
With a recent experience with commercial shoulder bolts, I was disappointed to find that the threads are not necessarily
concentric with the ground cylinder
You measure from center of the roll to the other center for the granite plates/Sine plate.
With a recent experience with commercial shoulder bolts, I was disappointed to find that the threads are not necessarily
The granite sine bar also appears to have the two rolls on different levels, on a tangent line not parallel to the "work holding" surface. Don't know why, perhaps so a standard gage block (or something more interesting?) could be a primary space block contacting sine bar and surface plate? Or maybe so it can achieve negative angles? Anyway, that changes the base distance a bit from what the roll to roll center distance measures.
Can you do a video on surface grinder noises?
Gedore is a top-quality brand ....this is not a cheap hammer.... nice tool
Any chance of a downloadable pdf on those war-time manuals ?
Paddy
I am tempted to get me a few copper hammerheads now. I love the material but you don't really get a hunk of copper anywhere.
I think you'll find that magnetic transfer block (we just called them magnetic parallels) handy for when you need to grind stuff really flat and parallel. Dress the wheel, set the block on the grinder, dust it off,_ DO NOT TURN OFF THE CHUCK_, wipe clean, set part and grind. Holding spacers for precision spindle bearings at .00005 or less was a piece of cake. Dusting off the block every time you use it gives you the flattest surface you can get on your grinder. I've got a few in my box plus angles from 1,2,3,4,5,10,15,30 and 45 I my box.
cool stuff, thanks for the video ...
Hi Tom,
Great stuff as always. I'm looking forward to seeing that 4 jaw rematch :).
Cheers,
Cylo
Thanks for the great vid.
If that's an LVDT it uses AC voltage to do the measurement. You aren't seeing much on your multimeter because it's in DC mode. Thanks for your videos! I love the ones on lapping.
Best,
Jacob
Take it to the Bash to Judge the chuck comp. Just kidding but would be a good laugh.
Keep the videos comming. Greg
Tom, it would be so cool to see a video on airy and bessel points. Like how long/thin a piece of metal needs to be before we can actually see a measurable deflection. (Like, you wouldn't see measurable deflection in a 3"(W)x6"(H)x16"(L) piece of steel that's stood up on the 3" side. Maybe you could detect it with your electronic gear, but when would we be able to detect a deflection.) Thanks Tom!
Tom, The copper hammer is especially created for use in the machine shop. Most machine work involves things being square and thus a nice square head hammer is essential.
However in a pinch you can hammer home square head nails with it! :-)
If your surface grinder goes "bloop-bloop bloop" you need to dress the wheel!!! LOL
Eric
Is the application for a non spark situation, where there are combustible gases, maybe inside storage tanks. I don't know it it is copper or brass tools that I'm thinking of.
bjr E. WA. It would definitely work for that. Copper, brass, bronze, and lead are all used for non sparking depending on the job requirements.
I've got a 10# copper sledgehammer in my collection, still haven't caught up with the Ox in numbers though...
Beryllium Copper tools ( a lot of non sparking tools ) can cause some serious medical problems. Research it. Wise Guy Ansi stamp might apply.
One tip on grinding tool bits in the surface grinder. The set-up is sweet but you are better off to have the top of the tool against the fixture side. Makes it really hard to accidently crash into the fixture that way. Just don't ask how I know this
Ansi Wiseguy xD pretty cool! got a chuckle outta that
is this a Lipton fidget spinner? thanks for sharing
Some neat stuff Tom. That German hammer looks like a real whacker it will get the job done and soon and if it does not you only need add an Abom sized Bozo on the handle.
Might the strange length sine bar be designed for specific arcseconds?
Hey Tom, very interesting. I've seen that type of clamping, it's used on the alum carbs on small RC nitro engines to position the carb for the linkage so you don't mess the carb body. Are you sure the bottom of the Alina didn't come out of a old car( radio ) lol, yes I'm that old too. What Fluke meter do you have? I have a 87 I used when I was a auto tech, they are great meters. God Bless Ya Dave
Tom is the middle man between the engineers and the real world fabrication limits.
nice t-shirt in the intro!
Tom do you grind the magnetic spacer for the grinder to clean it up? That would mean grinding brass and the steel pins . I have seen all kinds of cool spacers for sale yet never bought any and so I am curious how you would clean it up.
hi tom what is that star spacer you use in the lathe to space parts out on the lathe jaws and where can a guy get one thank you
"Bob's your uncle". A couple days ago I heard a South African man in Shenzhen, China, use that expression and I immediately thought of you!
Is that comparison stand using an LVDT as the sensor?
Tom, Austria has been driving distance from Germany since the 1930s :)
Tom: the loading of the DVM across the meter is probably throwing things off... remember "any measurement disturbs the item attempted to measure" etc.. Thanks Tom
Brian AKA GUSMIX on hear.
Need a 2-3 mic that has a vernier for tenths real bad if you wanna bring one to the bash.
what were the other two needles for on the gauge?
The sine bar is probably 550 MM.
your multimeter may be upsetting the balance of the bridge circuit they used in that comparator!
It's nice Tom to always see what you have for us. I would enjoy a video on scrounging for tools, machines, and good solid repeat business . Tell us earthlings how to master these kinds of things to increase American mfg and to help people improve our lives through using your knowledge to support ourselves better when we get old or for the young fellow wanting to make it. You might be helping someone greatly even saving marriages with better skills to make money in the trade we all love.
I'm guessing the lvdt is going to john saunders
Hi Tom! Are any of those CEJ mics 50-75 mm by any chance? I have a little collection of the 101 model but missing the 50-75 version. Cheers
I knew that hammer was German before i even read the Gedore brand. :)) It oozes German thinking when it comes to these kind of tool type and purpose.
Hey Tom I don’t know if you figured it out yet but max-min/2 is the average from a zero
min+max divided by 2 = average ?
Tom Ray yeah average from a zero
i just bought an old federal Gage amplifier and it uses the older federal EHE probes. is there any way i can adapt a modern probe to work with it?
hi tom i enjoyed that
You're up to something, you wouldn't be Tom if you weren't! See ya on Friday buddy :)
When are you complete the boss' printing press?
+1 for the completion of the press.
Max-Min/2 for use finding center of tapered bore?
That brass hammer comes in different weights. The 1000 gram is $132 on Ebay plus $15 for shipping from England.
For me, there are some things not worth buying and this hammer is one of them.
copper*
yes, copper. That's why it cost so much.
Looking forward to the compound angle setup instruction. One of the other better-known RUclipsrs stepped into the compound angle oversimplification trap a couple weeks ago and got called out for it in the comments (not gonna say who, doesn't matter). For small angles, it's no biggie but if you need to know, then you gotta do some math to get it right.
I don't think your odd length sine plate is odd length. I think it is metric. 21 5/8"*25.4 mm/inch =249.275mm. Pretty close to 250mm, which would make sense.
Hi Jack,
Check math. Probably a tad closer to 550mm. Thanks for the comment.
Cheers,
Tom
Should have gone to sleep and done the math in the morning.....
I believe that the electronic indicators work on the principle of impedance; meaning you basically have a ferrite core moving in a coil, which changes the impedance. It does not make sense to try to measure a DC voltage over this system.
Maybe someone who knows about electronics can shine a light up here?
Hi Fernand,
The coils are actually dual wound coils with an iron core. No moving parts. I think they behave like little transformers. The electronics in the base measures the phase shift between the two opposing transformers. There are no moving parts other than the indicator arm. Might be fun to tear it down and examine the entire system as I don't have a good feel for the subtleties of how it works. Thanks for the comment.
Cheers,
Tom
Again, my brain just got full.....
Gedore is one of the best quality hand tool companies in Europe
21 5/8 == 550mm ??
Rob B 549.275mm Whats the problem?
21 5/8 inches is almost exactly 550mm
Teutonic, is the word you are looking for that hammer.
Tom i think you will agree with me while we can do it quicker smaller finer farther, the old ways are still just as close to being black magic for their time today. Thanks for sharing
Tom and Stephen in a collaboration. I'm in geek heaven. Add Clickspring and (sound of Homer Simpson seeing a donut).
dam why does NYC CNC get all the good stuff...😉
max plus min /2 is average measurement.
A split Cotter...
The files are Swede, not sweet (:
I wanna delete "UH" from your vocabulary Tom, other than that, I love your videos, and I still suffer through all of the uh, um and uhm's
yeaaa give us meat, feed us
Machinist to Electrician translation..........6 thousandths of a volt = 6 mV. That's funny to me. Maybe only to me, but funny nonetheless.
Sadly missed
You could donate the electrics to @nemomatic he make some cool stuff on Instagram. Great video. Neat stuff.
:)
Real late to the game here, but min+max/2 is the average
hello. you are good master qualitatively do work . you can send wotsapp or mail I have a request to you . thank you