Wheel Repair

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This one is kind of near and dear to me

  Very neat way to fix a rim.Although not in this video, I like how these guys use calipers.  You don't see that too much anymore.  They take a very fine "feel" for getting the right measurement.  I use them on occasion, when I don't have a set of dial calipers, or vernier calipers, that'll fit the part.  Inside, or outside, calipers can really extend your measuring capabilities.

  Very handy to get the diameter without removing the bolts, or if you don't have access, or whatever............  I've got a nice selection of Browne & Sharpe, and Starrett, that I've picked up off of Fleabay over the years.  They're amazingly cheap for the quality.  Only buy ones that the seller has provided closeup pics from all angles.  Pay particular attention to the contact areas..........no nicks, or other damage.

  Where I have full access (bolts removed), I can use a vernier.  These used to be really cheap,, dunno if they are anymore.  They're surprisingly accurate.  All the Chinese, and Indian, made tools have skyrocketed in cost.I really don't think, unless I'm mistaken (which I usually am

), that manual machining has gone completely by the wayside in this country.  I imagine it's just not practical when it comes to competing with outfits that are set up for CNC.  Although............I'd imagine it's still competitive for one-off parts.
Reply:Sam, I take over as the crew chief for the manual machine shop for the tooling department at work next week.  So it isn't completely gone, but definitely diminished. Sent from my SM-G960U using TapatalkI haven't built anything I can't throw away.  Perfection is the journey.    Mac
Reply:The old ways take skill, not that the CNC machines don't I guess, it's just a different type. Watch a couple of this guys videos, he knows what's what and how to use gear and do repairs on equipment, I think Samm and him would get along; https://www.youtube.com/c/CuttingEdg...stralia/videos ................Mike
Reply:You need a bigger lathe Sammm.
Reply:

Originally Posted by farmersammm

.  I imagine it's just not practical when it comes to competing with outfits that are set up for CNC.  Although............I'd imagine it's still competitive for one-off parts.
Reply:

Originally Posted by SweetMK

IMO,, CNC blows away manual,, even for one part,, because measuring with digital is SO FAR BEYOND the accuracy of turning knobs by hand.I had manual, and CNC in my shop,, the only time manual was used was when we did not have the capability in a CNC machine.Those Pakistani videos, like the crankshaft video shows the lack of accuracy because of the lack of digital measuring.IMO, the crankshaft survives because it is only going to operate below 1,800 RPM,, anything greater, and the bearings of the engine would beat themselves to death,, quickly.The same with making hydraulic cylinders (they call them rams),, ZERO accuracy,, the manual made parts are not interchangeable,, that can be seen in that they "number" each assembly, to that the set of parts can be used together.They were using a large blue magic marker to position holes for assembly of the hydraulic cylinders,,then they drilled the holes with a drill press that had close to 1/4" of wobble in the drill bit before the bit contacted the part.I think virtually all the drill presses that they use have that 1/4" of free running wobble,,


Reply:You might also study pictures from the early 20th Century.  Workers in the U.S., and Europe, wore their everyday clothes to work.  They couldn't afford work clothes.  For S&G's look up the history of shirt collars...........they were interchangeable because people couldn't afford work shirts, so they changed collars when they got dirty.  People really lived on the edge in those days.  Times were hard for the working class...............Hell, they still are.Whether it was Hells Kitchen, the Bogside, or the West End....................nobody lived very well.  It's the reason the unions were established.  To this day, we benefit from those unions, even though most of us don't belong to them.  They were responsible for better working conditions.Last edited by farmersammm; 10 Hours Ago at 04:54 PM.
Reply:

  I thought of one more thing

.  The knob is dependent on the leadscrew.  I'd imagine a crankshaft grinder, or a surface grinder, probably has a leadscrew that's finer pitched.............making each movement of the knob all the more accurate.  Everything that exists today, is based on the old tech.  Mechanical movement is still mechanical movement.  I think even a step motor still relies on some sort of gearing/rpm for locating it along the path of the cutting/machining edge.
Reply:CNC improves precision and speed.  I suspect a manual machine with quality tool and gauges can be comparably accurate.Had a regular client bring in a shaft off of an exercise machine.  I told him it would be easier to rebuild the part. He left it with me to build up and turn down the races, then he needed it sooner than i could get to it.   He took it to a machine shop.  They said no problem, then machined it. Returned it to him. ....Oh they were 25mm metric threads, not 1 inch.  So, the CNC part worked,  the technician ASSumption missed.  I think the machine shop was actually cheaper, though. He just had to get a 25mm. nut
Reply:The one thing that makes me drool, is roller burnishing




  I love the music as much as I love the concept, and the tool.  This is the one area that manual won't work I'd suspect.  It's pretty precise stuff..........not only the movements, but the applied pressure.
Reply:I remember a few years back, when I bought my lathe.I had this funny sinking feeling, sort of a knot in my stomach.  It was a lot of money.  Around maybe $3500.  Stupid really, considering the money in the market, and the money out there running on the hoof............but it's a pretty sizeable outlay all in one bunch.  It felt like what it felt like this year, when the docs got ahold of me.  Scared, ya know...........I thought it might be a white elephant.Then I really got into it, I mean full bore

  It's a great substitute for failing eyes.  Doesn't require sharp vision..................Hell, it's a machine.The tool grinding was the biggy at first.Then after a while, it didn't matter.  Who the Hell's gonna look at it.  Most of the stuff you do is fine within about 2-5 thou.  Hell, it ain't the space shuttle.After that, it was fixtures, and turning aids.  More versatility.  Man..........it's been a good thing!!Use it all the time now.................nothing fancy, carbide is fine, don't need a mirror finish.  Life changes for the better most times.I only work with 4 kinds of metal (excluding aluminum, which I don't like).  1018, 12L14, Stress Proof, Fatigue Proof, and semi steel........Hell, that's 5 kinds.  But anyways.............it's pretty simple.
Reply:Many things were built from parts that were made on machines that didn’t even have a dro let alone cnc. Any machine is only as good as it’s operator. There is a whole pile of cnc crash videos. To me cnc shines where you can make a part store the file and down the road make more parts by pulling up the file.Millermatic 252millermatic 175miller 300 Thunderboltlincoln ranger 250smith torcheslots of bfh'sIf it dont fit get a bigger hammer
Reply:Sometimes, actually most of the time be it a lathe or mill, the machine isn't the expensive part. Add up tool holders, insert holders, chucks, centers and who knows what else and it adds up quick. Fortunately a lot of the import tooling is fairly decent and affordable. Best thing I added to my mill- drill unit is an import DRO. Let's not forget rotary tables, indexers, nearly every drill size imaginable, reamers and on and on. By rights if the machines were free and you bought everything needed to go with , it would still be very expensive.