I'll be honest, I was expecting it to be so highly toleranced that the top piece would not go all the way down because it would create a cushion of air
I've worked in microns before, +/- 1 to 2 microns, if you even breath on that kind of stuff your numbers are off, you need lots of thermal control when working tolerances like that. I've made cylinders like this that would take a half hour to fall that distance, or longer. The surface finish requirements for tolerances that high are also extremely high, the diamond tooling for cutting parts like that costs
I worked at a place where we wrote timing tolerances on the parts themselves with paint pens. Had to avoid writing in certain spots because the paint would throw off measurements.
I was a machinist for 15 years at a shop that made injection molds for medical components. The tightest tolerance we ever had to maintain was +.0001/minus nothing
I was a machinist for 7 years in the 90's. I broke a crankshaft by accidentally hitting the facing switch instead of the turning and destroyed the workpiece. I quit that same day. Having A.D.D. made it very difficult for me to stay focused. It was my first and last major fuck up. I stayed at the same company and became a welder.
I'm currently designing a process of cutting silicon to a squareness tolerance range of an arc second, or approx 380nm over 75mm. Thankfully I don't have to machine it too.
I want it to be so flush that it shouldn't go in because of thermal expansion when you touch it
Imagine if it was so close the marker stopped it!
I once cut a piece of wood within 7/8” of the actual measurement. So… thats not bad.
Cant be that tight if the sharpie didnt make it oversized 😂
I'll be honest, I was expecting it to be so highly toleranced that the top piece would not go all the way down because it would create a cushion of air
I've worked in microns before, +/- 1 to 2 microns, if you even breath on that kind of stuff your numbers are off, you need lots of thermal control when working tolerances like that. I've made cylinders like this that would take a half hour to fall that distance, or longer. The surface finish requirements for tolerances that high are also extremely high, the diamond tooling for cutting parts like that costs
Manufacturing tolerance callout: "Rubs but doesn't bind," You’re there!
I worked at a place where we wrote timing tolerances on the parts themselves with paint pens. Had to avoid writing in certain spots because the paint would throw off measurements.
My machinist neighbor gave me some advice once... no matter how many times you cut somthing you can't make it longer
that's what she said
The closest i get is usually it doesn't fit at all 🤔
If the tolerance was so tight on those two mating part with a blind hole, you wouldn't fit it in due to compressing the air.
I have read that the old Linn-Sondek turntable platter took a full day to settle into its bearing.
H7/h7 tolerance degree was pretty normal for a lathe for almost 40 years ago.
If it was stainless it'd gall halfway down & you'd never git it out... 😅
I was a machinist for 15 years at a shop that made injection molds for medical components. The tightest tolerance we ever had to maintain was +.0001/minus nothing
-0 +0.0004" with my machine being 0.0002 oval. That was something
As a firearm manufacturer, typically we work with +.0002/-.0000 or +.0005”/-.0000 on most of our components, the less important things are +/- .003”
I was a machinist for 7 years in the 90's. I broke a crankshaft by accidentally hitting the facing switch instead of the turning and destroyed the workpiece. I quit that same day. Having A.D.D. made it very difficult for me to stay focused. It was my first and last major fuck up. I stayed at the same company and became a welder.
I'm currently designing a process of cutting silicon to a squareness tolerance range of an arc second, or approx 380nm over 75mm. Thankfully I don't have to machine it too.