100,000 RPM Skateboard Wheel (World Record) 

YESS

POG

Already excited for that video

Yes yes yes yes!

FOR REAL??

Haha I just made a similar comment. I said you guys should team up with the SloMo Guys, they just got that quarter mil phantom, it would catch it!

I think they got close to 2 mill once

Destin from SmarterEveryDay already said he's in!

Bro...they know who Slo Mo Guys are...they're one of the largest channels on this platform... Not exactly a phone call away lol

@@thomasriding3194 Actually I tweeted at Destin from SmarterEveryDay about an hour ago, and he already said he's down. He even commented on the video saying so. You'd be surprised at how easy it is to reach some people.

You called it.

destin means smartereveryday?

Honestly I don't think any bearing assembly in this current day and age can hold up to 100k rpm

@@koreyhayden1368 lol what like every turbocharger spins at >100k RPM. Now 100K RPM with the amount of force applied laterally by the waterjet, that's another question. Also they probably didn't balance this like a turbo spinning at 200k RPM would be balanced.

@stevegredell1123 ya thats true but those are "specialized bearings". I just meant your standard buy from an wuto parts store type bearing. Ya ones Ina turbo are meant to spin Hella fast

@stevegredell1123 also, quit being the guy that likes his own comments

" if you cut a few flutes on it to so it makes a better tone, you can use the frequency of the sound to calculate the speed." Id' just like to point out for future posterity that this is how the Waterjet Channel invented their city destroying sonic weapon.

yeah, better bearings

I approve

i third this

Get some high speed bearings. Possibly high load and high speed bearings depending on the force of the water.

And installing them the right way I guess

So the wheel surface was moving at supersonic speed. Wow!

Yep, the chips in his hair mucking around was bad enough, but long sleeves and gloves made me wince

how in the world is putting shavings on your head "the most dangerous thing" you can do using a lathe?

I almost ran downstairs and hit the STOP button

@@jacobcronk1844 small chance they could grab and pull you in, more chance of them grabbing and becoming spinning blades. But moreover it shows carelessness around the lathe. Honeslty though, the long sleeves are the worst bit. Yes, these are all issues that have a relatively low risk of happening, but you don't fuck around with lathes, this machine easily has the power to suck his arm in by a sleeve and spin him round until he becomes burger meat.

​​​@@jacobcronk1844 because a lathe can take the slightest loose material and use it to pull you in and turn you in to a red paste shishkebab.

The gloves and long sleeves is a recipe for disaster. Latex gloves arent too bad since they will just rip but best to not wear any

Yeah, no shit... I cringed

You guys don't understand, he had his Safety Squints, he was fine

his hair is like 5 inches?

Came here for this! The chips on his head gag was bad enough, but the gloves and long sleeves made me wince

I knew somebody would know enough about this kinda stuff. Epic 😎😎

Close but not quite. "In pythagorean tuning, the diminished-5th is mathematically (9/8)2(256/243)2 = ratio 1024/729, expressed in decimal form as... 1.4046"

Yep, since each octave doubles the frequency, equal tempering is an exponential scale rather than linear. Multiplying by 1.5 to go halfway between the two frequencies would be a linear scale. Mark H's answer based on the Pythagorean scale gives close to what the equal tempering result would be at ~1.4 times the lower pitch for a half-octave (diminished fifth), but Pythagorean is based on ratios rather than exponents; so in equal tempering, each semi tone is the lower frequency times 2^(1/12); a whole tone is times 2^(2/12), and so forth (adding 1/12 to the exponent for each successive half tone). So a half octave higher is the lower frequency times 2^(6/12) or 2^(1/2) or exactly the square root of 2, about 1.414, slightly different from Pythagorean tuning.

fine, its 42% then and not 50%...but you guys dont seem to realize that my scale was an estimation. im not sure it was a perfect tritonus and the rpm also were more than my written 70.000. thats why i used the word "about" two times in my post.

@@thomasherzog86 Please be understanding as I am a long time sufferer of SIWOTI Syndrome.

that means top rotational speed of 3073,5 km/h!

they can actually reach up to 850000 rpm

So funny how many SloMo Guys comments on this video, I also said same thing them started reading comments haha

If not the Slow Mo Guys, Destin at SmarterEveryDay would probably do it as well!

@@gliixo true!!

@@koreyhayden1368 Destin already said he's in! That was wicked fast

@@gliixo awesome!!!

He could barely use the lathe without dying

Your ears are going to get parpused

those usually arent good for high rpm. Anguzlar contact bearings are their best bet. Needle bearing would also be good tho.

I hit 1300mph, 3.8 million rpm at 24 million Gs, see my video posted above.

Some ceramic bearings are even advertised as being suitable for load speeds of 100k rpm so I'd highly recommend looking into them, and ceramic or ceramic hybrid bearings tend to be what's used for dental applications where operating speeds can be as high as 500k rpm (although they are smaller In size and used in air turbine driven drills etc)