This photo was found on my HD, I can't give any credit, sorry.
The #machinist who made them is highly skilled, even if they are totally useless!
Maybe there is no need to add these to my screws database.
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My #workshop database is reaching J.L. Borges levels: an infinite¹ number of shelves, each one with an infinite number of drawers, each one containing infinite parts, and each one could be a set of drill bits…
Where can I find a good 8mm HSS bit?
I can call that "The Toolroom of Babel"² and I must study in a deeper way the JOIN clause³.
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¹ from a #machinist point of view a 64-bit unsigned integer is pretty close to ∞
² https://en.wikipedia.org/wiki/The_Library_of_Babel
³ not "joint": https://en.wikipedia.org/wiki/Join_%28SQL%29
en.wikipedia.orgThe Library of Babel - Wikipedia
Machinist-types: MT or R8? Does it matter? #machinist
Oh, dang. Behrens made a sick lightweight and curvy wristwatch. Even if it was free I couldn't wear it but as a machine-minded person I love the stuffing out of the engineering, manufacturing, and aesthetics.
#horology #machinist
https://youtu.be/GOqzjrPnWao
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If you know how the "release key" works on Pratt Burnerd lever-closed collet chucks, even if you don't have any form of documentation, mine does not seem to be working and I could use help understanding how it should work in order to proceed with disassembly and cleaning. #machining #machinist #lathe
I'm looking for anyone who has a Pratt Burnerd lever-closing collet chuck of any kind, and/or anyone who has a manual for one. Pratt Burnerd don't seem to keep them on their web site; fair enough, this has been out of production for decades. But I'm crazy enough to have bought what is apparently one of the few D1-5 PB LC-15s ever made (because I wanted a collet chuck with similar capacity to my spindle) and I'm trying to bring it back to life.
Photos or scans of the manual for any of their lever-closing (or maybe even pneumatic-closing "PC") chucks, or any teardown pictures or videos you know of, would be helpful. I'd like to be a good steward of this piece of machining history.
An historical question for every #machinist here around (my wife asked me and I don't have an answer).
There's a reason why the keys for #lathe chucks are generally square and not hexagonal?
A question for every #machinist more skilled than me (just to avoid to write "all").
To support parts that have to be rotated wouldn't be better to have a machinist #jack with a rollers head, like photo 2, rather than with a flat head, like photo 1, which moves every time the part is turned?
Feel free to steal the idea if it's good!
Sources:
- gear cutting: https://onion.tube/watch?v=UP3HzXcC6Pk
- heavy duty roller stands: https://onion.tube/watch?v=av4E-ezc7LE
A video which will amaze any fellow #machinist (I hope): how to test the accuracy of a dividing head in a very unconventional way.
Faster than to use a laser and a 1 km ruler, applying the law of sines with a lot of decimals 
When a fellow #machinist from England tells "By jove, I have a bad vice!" here is the first image jumping in my mind.
Hey, shop folks. Do you use software to manage jobs, stock, etc? I use spreadsheets and whiteboards and really enjoy *not* using the computer for planning but of course I wonder about ERPs like Proshop and Jobboss. If there was a FOSS ERP I might give it a whirl.
#machinist #shoptalk
If you're a #machinist near #Seattle today or tomorrow between 9am and 2pm then I highly recommend going to the OnlineMetals.com clearance sale. They're selling metal stock by weight at amazing prices and the selection is still good, especially for stock that is two feet long or less. I'm sad that they're closing this branch but oh wow am I happy with my new stock.
Okay #machinist, #precision #measurement, and #tool Mastodon. I inherited a collection of tools which includes these apparently-high-precision calipers and micrometers. Not totally sure what they are but listed accuracies are 0.0001 inches. My guess is that this is worth a fair bit. Is this worth trying to sell?
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I think this would work. Any #machinist here want to review?
- Dividing head set at 26.5° (116.5° - 90°)
- Using smallest end mill larger than the face, cut every 72° to full cutter engagement, leaving sufficient uncut stock at free end to hold in next op
- Advance stock twice for next two dice, leaving uncut material between
- Reverse stock, align horizontal with a cut face, turn 36°, then cut every 72° to measure across opposite faces
- Advance stock twice and repeat for remaining two dice
- Transfer to lathe, face off one end, then part off to length
- Advance stock, repeat
Then 3D print an alignment guide holding two punches, and punch the prime set (where each side is a two-digit number) into the set of three dodecahedral dice.
I'm a #machining tyro. Any improvements that would make this easier, assuming that I don't want to swing my mill head? (If I wanted to make a lot more, I could instead swing the head and use a tailstock, but for only three I don't think I'd need to do that, and right now the tram is pretty much perfect.)
A guy bought an old #machinist toolbox and found inside it some paystubs.
Are you interested in knowing how much a Lockheed machinist made in 1979?
There comes a time in one's life when a shop humidifier seems like a great gift. For me, that time is now. #PacificNorthwest #Machinist