Grinding the Squaring Block part 1

This video shows part one of the grinding of the Squaring Block to less than 50 millionths of an inch.
DC53 pdf. www.alro.com/datapdf/metals/d...
Cryogenics: www5.kau.se/sites/default/fil...
www.sciencedirect.com/science...
www.researchgate.net/publicat...

[@TheArsonsmith4242]

OK, my favorite part, "You have to have patients, there's no way to speed this up that I know of." -immediately followed by fast forward video.

[@SolidRockMachineShopInc]

That's my favorite part too! I purposely edited it that way. Rachel

[@Molb0rg]

@@SolidRockMachineShopInc really wished to hear the sound, on both sides

[@davidmoore5021]

I was thinking the same thing.😂😂😂

[@jefferdman5921]

Thanks! I appreciate your taking us through the grinding process step by step. Nicely done!

[@SolidRockMachineShopInc]

You're welcome Jeff. Steve

[@duobob]

The difference between professionals who care and amateurs like me... Excellent work, and also a really good job of transferring some of that knowledge to us. Thank You! We appreciate it.

[@SolidRockMachineShopInc]

Thanks Bob. Steve

[@robc2536]

Flat and parallel within 25 millionths, nice work Steve!!

[@SolidRockMachineShopInc]

Thank you Rob. Steve

[@DK-vx1zc]

Thanks for sharing Steve. I really enjoy and appreciate all of your videos. And I appreciate all of your insight, etc. The videography is A+++

[@kathyb7126]

Thank you! Rachel and I have been taking a bigger role in filming and editing since it's hard for Dad and Adam to coordinate their schedules due to working different hours.

[@SolidRockMachineShopInc]

You're welcome DK. Steve

[@hermit.shed.]

Thanks for taking the time to make these videos Steve. I'm very interested in getting into grinding and have found a lot of useful info in your videos.

[@SolidRockMachineShopInc]

You're welcome. Grinding is not that hard with a little practice and patience. Steve

[@ActiveAtom]

Thank you for sharing the PDF for DC53 printed and we will learn about it. Great share about heat and build up at 13:18 in only Steve's skills would know. Thank you for teaching this pair grinding tips & tricks we value your lessons. You crank them handles steadier then a CNC grinder.

[@SolidRockMachineShopInc]

Thanks Active Atom. Steve

[@RRINTHESHOP]

Just Awesome, beautiful work from Solid Rock Machine. Thanks to Steve an gang.

[@SolidRockMachineShopInc]

Thanks Randy. Steve

[@ericrichards5862]

Hi Steve, Thanks for the great video, I have been applying your knowledge and I appreciate the videos very much.

[@jamiebuckley1769]

wow very imprecive steve nice work. im just in the process of getting my 1970s harig super 6--12 grinder going wich i just purchased. so i enjoy all your teachings on grinding. thanks for the great videos..

[@SolidRockMachineShopInc]

You're welcome Jamie. I hope that grinder serves you well. Steve

[@brianu2871]

More good lessons Steve. Thanks !

[@SolidRockMachineShopInc]

You're welcome Brian. Steve

[@bcbloc02]

Came out great!

[@SolidRockMachineShopInc]

Thanks Brian. Steve

[@reideichner8597]

Amazing work and great video!

[@SolidRockMachineShopInc]

Thanks Reid. Steve

[@EmmaRitson]

very interesting steve. really enjoy learnign about this stuff. and you are a good teacher

[@SolidRockMachineShopInc]

Thanks Emma. Steve

[@404BYTE]

impeccable precision

[@SolidRockMachineShopInc]

Thank you. Steve

[@outsidescrewball]

Thanks Steve...great discussion and demonstration...good lessons

[@SolidRockMachineShopInc]

Thanks Chuck. Steve

[@TheGoodoftheLand]

Very impressed.

[@kathyb7126]

Wait till you see part 2 and part 3!

[@billdlv]

Nice job Steve, that is some amazing precision. BTW you mention in the video the temperature of the cryogenic treatment, -190. For those interested that is the boiling point of liquid Nitrogen in Celsius (°C) at atmospheric pressure. In Fahrenheit it is -310 °F.

[@erikjohansson1814]

Bill De La Vega For those very interested it is 83 Kelvin with a small plus at atmospheric pressure.

[@SolidRockMachineShopInc]

Thanks for the info Bill. Steve

[@HepauDK]

When I apprenticed as a fitter back in the mid-90's, one of the other apprentices forgot to run the stone dry before turning the grinder off at the end of the day. No need to tell what happened the morning after. I'll just say, it was a good thing that noone was standing at the bench grinder 10 feet away... Btw, the grinder we had, had a stone about 3 times the width and a lever-operated dresser built in. :)

[@SolidRockMachineShopInc]

Hi Henrik, I seen a person running coolant on the wheel without it running as he was cleaning the chuck. This was a 12" diameter x 2" wide wheel. It blew up when he turned it on. Boy was it a mess after that. Steve

[@flashpointrecycling]

Wow!

[@somebodyelse6673]

When you're using low magnetism, would it make sense to have a stop block clamped across the magnet so the part can't fly off?

[@SolidRockMachineShopInc]

Hi somebody else, It depends on the shape, size and material. I have seen people blocking in D2 plates that have very little magnetic holding power with CRS which has high magnetic holding power and blow up wheels. What happens is the D2 under the right conditions may heat up and thermally expand into the wheel generating even more heat. The only way it can move is up into the wheel because it is blocked in by the CRS. If you don't use the stop block the D2 slide off the magnetic chuck with very little risk of damage. You will rarely see me using stop blocks. Steve

[@sharkrivermachine]

What distance step over are you using for the finish pass? Another great grinding lesson.

[@SolidRockMachineShopInc]

First pass about .05 -.075 per pass, second about half that and third pass about .02. Varying the step over on the blank passes helps in flatness. Steve

[@sharkrivermachine]

Thank you, Steve. Glad to know that I am in the ballpark with my grinding step-overs.

[@nickrandol9133]

How do you compensate for abrasive wheel erosion? Seems like the wheel’s diameter would shrink as you cut your part....

[@James-fs4rn]

Thanks for another Steve! Are all pink wheels an AL oxide and ceramic matrix? As in other brands.

[@SolidRockMachineShopInc]

Hi James, No. I switched to a full Aluminum Oxide pink wheel after the rough on both sides to get a better finish. Steve

[@RyanWeishalla]

Nice lessons on grinding. Are you ultimately looking at hitting specific dimensions? Or just square and parallel?

[@SolidRockMachineShopInc]

Hi Ryan, Just flat, parallel and Square. Steve

[@jamessonger3]

what kind of surface plate do you have? what's the best one?

[@SolidRockMachineShopInc]

I am using a grade B from MSC. It was on sale and a cheaper one. 24" x 36" black granite. It is suppose to be within .0002" flat. Over the years I have bought about 4 of these and never been disappointed. In the past we had them inspected and resurfaced once a year and every one was still in spec after a year. This one checks out very good too. The pink ones are a better wear granite but harder to resurface plus they cost more. If you cant afford it I would go with the pink. Steve

[@jonbaker3728]

How fine are the adjustments on your grinder? The divisions are .001 on my old Norton and each line is maybe 1/4" across. So splitting to .0005 should be simple, but holy hell, does that machine have some kind of compound low for lowering the spindle?

[@SolidRockMachineShopInc]

I have a DRO with .00005" resolution. I don't even look at the hand wheel scale. I use the feel of the hand wheel, I am sure you won't see it move but you can feel it. It takes a little to get use to but works great.

[@MetrologyEngineer]

What's its dimensions and what is it made out of?

[@SolidRockMachineShopInc]

They are made of DC 53 and nominal sizes are 2.25" x 5" x 5". Steve

[@Grandpa82547]

To get 25 millionths accuracy in the work, what is required in the grinder?

[@SolidRockMachineShopInc]

Hi Grandpa, You have to have a grinder in good shape with very little wear. You can still get results on older machines with some wear you just need to know the sweet spots and a few tricks like spin grinding the part. Steve

[@razorworks9942]

You know for most shops like Abomb79, BarZ, Ox Tools, this would be acceptable, but here at Razor Works your going to have to dial it in just a touch more...50 (B)ILLIONTHS will pass my specs.....🤣🤣🤣 Unfriggin believable Steve!!! Is your grinder a manual machine? And are these are the blocks your going to sell? Fantastic job... Razor!

[@SolidRockMachineShopInc]

Hi Razor, Yes this is a manual Acer 6 x 18 grinder. Yes, we are already selling these blocks at $975.00 each. This batch of 3 is already spoken for but I will be doing 5 more very soon and 2 of them are already spoken for. Steve

[@razorworks9942]

@@SolidRockMachineShopInc I'll have to save up for one, so keep me in mind!!

[@robertegan3889]

Where did you purchase your material to make these blocks?

[@SolidRockMachineShopInc]

Alro Steel

[@robertegan3889]

@@SolidRockMachineShopInc is there any chance you would want to do a video on how you ordered that material thru their site? I'm computer illiterate. I can't figure it out. Thanks, Robert

[@SolidRockMachineShopInc]

@@robertegan3889 I don't order through their site. I call them and place orders over the phone.

[@pierresgarage2687]

Just like you say, smaller bites and patience.... ;)

[@SolidRockMachineShopInc]

Hi Pierre, That's what works for me every time. Steve

[@barrysummers8577]

I have often wondered why they go from ten-thousandths of an inch to 50 Millionths is there no measurement for one hundred thousandths of an inch?

[@SolidRockMachineShopInc]

Hi Barry, We are measuring increments to right side of the decimal so things can get confusing. So when a toolmaker says "one hundred thousandths of an inch" this is what is meant .100 or 100 units of and inch divided by 1000. When the toolmaker says 1 ten thousandths of an inch this is what is meant .0001" or 1 unit of an inch divided by 10,000. When the toolmaker say 50 millionths of an inch this is what is meant .00005" or 50 unit of an inch divide by 1 million. I hope this helps. Steve

[@barrysummers8577]

I was using this reference chart from mathforum.org/library/drmath/sets/select/dm_place_value.html I believe what you're calling 50 millionths would be 5 hundred-thousandth of an inch on the chart below. Place Value Chart 0.000000001 one billionth 0.00000001 one hundred-millionth 0.0000001 one ten-millionth 0.000001 one millionth 0.00001 one hundred-thousandth 0.0001 one ten-thousandth 0.001 one thousandth 0.01 one hundredth (1 in the hundredths place) 0.1 one tenth (1 in the tenths place

[@SolidRockMachineShopInc]

@@barrysummers8577 You would be correct according to the chart but if you talked to a toolmaker and said "5 hundred-thousandth of an inch" he is going to think you are saying .500 or 1/2". It all boils down to the unit you use to divide an inch and giving the correct amount of that unit. I don't know of any toolmaker that would use the term "5 hundred-thousandth of an inch" to describe 50 millionths. A toolmaker would call "0.00001 one hundred-thousandth" 10 millionths so as not to be confused with .100 which he would call 100 thousandths of an inch. The chart would be less confusing if it said .00001 was one hundredth of a thousandth of an inch. It is all about terminology and using the least confusing language. Steve

[@t.d.mich.7064]

Let's see squareness ground within .00025" now. That's even more challenging. It takes top notch equipment and talent

[@SolidRockMachineShopInc]

Next video you will see it. The squareness was within .00005 TIR which is .000025 per side. You can see it now on my Instagram page instagram.com/p/Bqn60aGg7FN/ Steve

[@t.d.mich.7064]

Way to go!

[@SailingYachtDreamcatcher]

You probably mean “cryogenics”?

[@kathyb7126]

If you read the description you'll see it says cryogenics and gives links to where you can learn about the process.

[@SolidRockMachineShopInc]

Yes! You are correct. Steve

[@dickhorner]

How to turn an 8 minute video into a 24 minute video. BORING!