Reddit Machinists Viral Arguments Over Measuring The Correct Key Size

If you want to start an argument, ask the lathe guys what is better I have looked on ebay, offerup, and craigslist, ebay has pretty good deals but hesitant to buy them without checking them out in person. Setting your dimensions to zero, or setting them to the actual measurement.

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I have no idea how they measured the really big stuff, largest measuring equipment i ever saw there was a 120 inch caliper I'm trying to buy some used measuring tools like bore gauges, snap gauges, micrometers etc and was wondering if someone could share any tips I don't remember how big the cmm could go, it was huge, but that only helps final measurements not when you are machining

Are they truly measuring size correctly per the applicable asme y14.5 standard

Inspectors might also measure the hole the same as the machinist, which might mean they're both measuring it wrong, or the inspector might be using a 2d vision system or 3d tactile measuring system, both with a small or large number of measuring points. A comprehensive overview of keyways, how they function, and the key and keyway dimensions/sizes involved in their design. Discover essential metrology tools for machinists in this comprehensive guide, covering measurements, instruments, and building your toolkit. A reddit for machinists of all varieties

From old school conventional guys, to cnc programmers, to the up and coming next generation. Decades of experience trusted by machinists, engineers, and quality inspectors alike. What are machinists measuring tools If you are new to cnc machining you may be wondering what precision measuring tools are

If you want to measure accurately you will need to learn how to use a micrometer and other similar tools.

How to read a machinist's scale or rule written by phil kerner phil kerner has over 40 years' experience as a tool & die / moldmaker as well as extensive experience in mold and fixture design, edm, cutter grinding, and cnc machining. It's not that those math classes you took were wrong It's just that in a machine shop, the language of numbers is different To make parts correctly and size them properly, you need to understand the lingo, especially when it comes to the right side of the decimal point

In the machine shop, people speak in thousandths, even millionths, of an inch. I've got into some pretty loud arguments about how to measure thread depth accurately Whether it's measuring the depth of the thread gauge, a special ground bolt, or counting turns is always an argument Emuge makes thread depth gauges that are probably the gold standard.

Question i'm thinking about the size of a really small square edge (like 2x2), but with a digital reading on it add a comment

They were made available publicly in 2017 They have replaced ansur i as the most comprehensive publicly available data set on body size and shape Full table with percentiles below (it includes instruction how to measure wrist correctly) The key is what goes in the keyway

And the key is generally a separate piece of metal that is driven into a slot on the male shaft as an interference fit, then the whole shaft plus key goes into the keyway on the female part. The dimensions that are tape check they prefer in fractional, the machinists need decimal and we frequently have parts that are designed in imperial but require metric threads in certain areas. A machinist stone is also going to be your best friend as well, smaller polishing stones work wonders when you're trying to stone small areas that you can't get a 6 inch machinist stone in or you want finer control over Ratchets, sockets, allen wrenches, torque bits, screwdrivers and dead blows are all shit you need as a machinist.

It's actually kind of annoying how under valued machinists are

If there were no machinists everything in the modern world would grind to a halt, and it's certainly one of those trades that not many know about but is certainly critical. As a follow up to that question, is there a good guide, book, or maybe video that would go over the measuring of things Like how to use the tools correctly for the best results. The only thing a comparator is used for measuring is features you can't measure in any other way

If you can put a gauge on it, the gauge is better. Very cool milling machine simulator 3d on steam Goes into details like axes, setting ref point, and choosing correct tool size/feed rate Has anybody else played this?

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I love being a machinist, to go from this rusty piece of over sized metal to a.984, clean shaft just makes me so happy And it's not even done yes, have to put key ways in it, re size the other end, and put a snap ring groove in it. Machinists of sydney (au), where do you purchase steel from I'v been looking for steel sheet to complete a project for a while now, and every site i find only stocks huge sheets (ie

Given that i am looking for quite thick steel (6mm or >), these sheets easily end up costing hundreds if not thousands of dollars. To get the size correct, choose a feature that is easy to measure in the drawing and in the real world Scale your drawing by (real world measurement) / (drawing dimension).