As a lifelong Journeyman Tool & Die Maker (1983), I've gotta say that was a fantastic demonstration and tutorial. Many who are entering the trade need to watch the explanations on part cleanliness, wheel dressing issues, etc. I'd buy my knives from you guys without hesitation. Bravo!!!
We used to have our surface grinders completely isolated from the rest of the shop for dust and thermal stability. If you are concerned with either effecting the surface grinder operation, you might build a room around the grinder to keep the surface grinder as stable as possible. Just an idea... Oh, ok. Walls are getting put up. Good. Next to that door you would have thermal stability issues from what I can see here 2,500 miles away.
Put a layer or 2 of newspaper down on the chuck before you put your parts on for the first opp. It will swell up with the coolant and fill the voids to help get the parts flat
You do know that you can get transfer blocks right? Grinding blocks that have narrower pole spacing's that basically tighten the magnetic fields of the larger poles. We have a table with the same spacing's as yours and I just use a block for thinner parts because the magnetic field just passes right through them otherwise. Lovely grinder though, I bet Angelo is having a blast using it.
Had the same issue with a different model with the coolant system also the drain gutter at the back of the table underneath the z axis guards is very narrow and prone to clogging up we do a lot heaver grinding from soft to 60 rc . Nice machine
Think of the poles like velcro, big spacing, big loops of flux projecting out of the table "hooking into" your part. The poles are only slightly taller than they are wide so for your short parts you need a lot of short loops so they aren't over penetrating the part so to speak.
There are grinder wheels for polishing which are very fine grit and suspended in a slightly elastic binder. I think you could easily eliminate a lot of lapping with these and since they even make them for hob style gear grinding and polishing I bet they can hold a tolerance. PS: the grinding nuts seem to agree that if you dress a wheel, stop it and restart it will expand differently everytime due to the centripetal force and loses it's roundness. BUT dressing a wheel changes it's balance due to irregularities within the material itself, so unless you have a grinder with live balancing capability you can never really have a wheel both perfectly dresses and balanced at the same time.
Awesome. Angelo seems to be right in his element. Would be cool to see a zero point system with two magnet pallets on the grinder to do the time consuming setup parallel to the grinding.
Yes please. More videos about normal people surface grinding would be awesome. If I was able to make videos at work I would record tons of stuff I do on an Amada TECHSTER-64. It makes chisels.
Drill the holes in the lockbars first, using a single purpose magnetic chuck (you'll be digging holes into it, but they can be very cheap, and for drilling holes, it's not mission critical that it's an expensive one), the slap it on the CNC using the holes you drilled. That way, you'll always have the lockbar area static and unmoved. To affix them to the CNC pallet, use expanding grabbers (like a cleco clamp) that come from behind.
@@joenicotera2991 thanks, that makes a lot of sense. I just haven't seen a knifemaker use it before, only in production of tools for extrusion of plastic with really tight tolerances.
Hello Mr Grimsmo. I saw a lot of useful things in your videos. Please tell me, do you carry out the milling of the descent of the knife blade on heat-treated metal? Are there large deformations after heat treatment? Is it necessary to carry out another grinding operation?
at about 10:00 its mentioned that they use 99% isopropanol, i think this may be a mistake as they want to clean both polar and non-polar (dust mentioned). Pure isopropanol only touches the non-polar impurities.
Machining coolant has oils and stuff in it that lubricate cutting tools. Those same oils can load up grinding wheels. Grinding basically only needs coolant for heat and wash away swarf not lubrication. So you might want a grinding specifc coolant. Just something to watch for. Also, angelo probably knows but don't leave the magnet on for long periods of time without coolant flowing. It'll heat up which obviously can cause an accuracy problem but it can also cook the magnet and ruin it. Grinders are one of the grossest things out there and yet also require the cleanest setups. Its ironic and annoying but such it the grinding life.
I used to work in a tool room, we made multi stage progression tools working to 10% of component tolerance, our levels of accuracy were on average 0.0002” we didnt worry about dust, and stoning tables maybe this is hype maybe maybe justification of inflated prices but this is seriously OTT
If you wanted another good surface grinder to go along with the Okamoto I would look into a Nicco. It's too bad they're no longer being made but they are seriously nice machines.
How much is a diamond dresser? Just thinking if it could get destroyed in one session by not running the coolant wouldn't it make sense to hook up a secondary coolant nozzle pointed directly at the diamond with a solenoid and a macro in the controller so that there's zero risk of ever forgetting to turn it on?
Waterjet machines are great ?? As long as there Not in your shop. They leave a nice coat of dust on everything in sight, forever cleaning If you like your machines.
@@weldmachine yeah I can only imagine lol every one I have seen they are caked in muck lol. I was just being facetious with John getting every machine to do it in house because I am the same way, they could put the waterjet in Erics building where the dirtier work is done and all the manual grinding and polishing is done
@@ClockwerkIndustries Finding a space to install it would be a good place to start for sure. 👍 Sometimes it's best to pay other people to do the job for you. A question i answered with a recent customer enquiry was ? Why don't i do my heat treatment in- house ? Quality control was one main reason. I am not a professional i can do it but can i guarantee it ?? When the Heat Treatment fails for what ever reason i feel a little happier that i am not totally at fault, LOL. Plus the chances of failure are reduced if someone who does it as a job would have less chance of something going wrong. Heat Treatment and Waterjet Cutting are two different topics of course but somewhat related as problems that can be someone else's responsibility, LOL.
Coolant absorbed into the wheel sucks. It takes a while to get it all back out and in balance again. Of course never run the coolant before running the spindle. the mist potentially coming off the flow and affect balance. Spark-out time effects finish and size and of course cycle time. It can also affect the condition of the wheel, which can lead to glazing. Skill and knowledge play a big part in grinding. We turned our surface and cylindrical grinders on 30 minutes before start of day. we also rand the table travel. We allowed our Kellenberger Cyl. Grinders 0.0005" on diameter(up to variable) for the first 20 or so minutes of the morning. Once they warmed up, they would hold 0.0002" all day. Never switched them off during the day either(maintain temperature). Nice machine you have there, good luck :-)
The "hopping" you see in the steel is most likely caused by the poles in the chuck, not your grinding wheel. For the wheel to give you perfectly parallel lines would require it to be in phase with the movement of the bed. It's much more likely that your steel is flexing from the chuck.
Looking like you will need your very own waterjet too. Then you could have all of it in house! I'll assume you will be telling us something BIG is in the WORKS in about a month or so!
Whats up guy Daniel the tool and die maker, the key to success in surface grinding thin parts perfectly flat on a relaxed state boy this is gonna be a long one. The key word is relaxed state, which means the realationship between the mag force and part flatness in a relaxed state. In tool making i like to have flatness of .0002 per foot. With parts like your knife blads on the first side you want your magnetic force to be light enough where the blake will hold its original warp at a relaxed state but not launch the part. There are a few ways around, it for a production run like yours you can make a plate out of cast iron the size of the mag with cut outs for the blanks like .005 per side bigger. The point of the plate being cast iron is increase mag force also surface area then u can run the mag force like but still retain holding.
Interesting video on a Rolls Royce of grinders. Just a bit of side info, diamonds are some of the best heat conductors in nature. The comment about diamond not conducting heat is incorrect. Also long parts can get temporarily straightened my the magnetic chuck if you aren't careful. I am definitely no expert, but have been watching videos of others who know a whole lot more, like Steve Barton over at Solid Rock Machine Shop and pulling tenths is tough.
im no grinding expert by ANY stretch of the imagination, a finer grit will induce a lot more heat / warping. have a look at Solid Rock Machine shops video on grinding wheels. i hope it helps
@@danielrogers6090 Good to know. I was coming from CNC mill/lathe world where thermal expansion will change the cut at the beginning of the day vs the end of the day.
@@vitalcarry hello buddy in a cnc mill or lathe environment the machine components are usually very long like the ball screws the longer the component, more variation. Thats y offset need to change throughout the day as the climate changes
Hi John, I have the old double wheels on my office chair and they are a PIA. Where did you get your wheels and did they come with stems and housings that hold the wheels? Any information you can supply would be appreciated. BTW GREAT GRINDER !!!! enjoyed the video. John
@@kkknotcool True, they are messy. They do have plenty of room in the finishing shop. A Waterjet, would pretty much bring all of their processes inhouse, which I'm sure they would prefer. But, I guess, it would depend on the economics of it.
@@brianwihowski1345 Economics is another thing. Waterjets are like 100 grand right? They are probably only gonna get a few hours a week of cycle time off the thing. I don't know how you pay off a 100k machine on a few hours a week of cycle time on any machine.
@@kkknotcool Yeah, the cost, would probably make it prohibitive. I know, some companies make smaller Waterjets. But, unless they could use it for other parts, it might be cheaper to still farm it out. Still, it'd be fun to have a Waterjet...
@@kkknotcool I was just on Flow's website, since they seem to be one of the more popular Waterjet makers. And, they do make some smaller machines, and one that is fully enclosed. With Rask production cranking up, and probably other products in the pipeline, this could be a future viable purchase. Maybe, other uses for it, like Grimsmo titanium keychains, custom cases, etc. Hey John, if your listening, I've got other ideas for a discounted Saga...😉
I am not trolling. I love the look and feel of your knives though I do not own one. I hope to one day. I’m trying to understand how you are able to afford all of this incredible equipment when you seem to manufacture and sell so few knives.
@@chronokoks I started watching John years ago when I was looking for a milling machine. I came across this video with this guy in a garage explaining why I should buy this milling machine that he had converted into a cnc machine. I think that's what it was anyway. I think he wanted $3000 dollars for it. I'm not even sure if he was making knives at that point. and then the next thing you know he's unloading a Tormach & it's off to the races. I didn't buy the machine he was selling.
Try soaking the wheel before you dress it, it makes a big diffrence between Setups. Btw.Diamond does conduct heat and you dont cut on a grinder, you grind
Great tip on the soaking...but it's still a cut. The grains present with a very negative angle and deform material till it fails, just with different angles and parameters. Think of the wheel as an infinite tooth burr with nano scale runout. Teeth wear crack and break, while the binder made flutes can clog and jam (which breaks the grain just as quickly as the tooth of an endmill would break if the flute was clogged).
Love the grinder and the explanations. Video quality, not so good. Nothing is ever in frame, or in focus. Camera is always behind chasing the subject, and never in focus. Go to a smaller aperture, greater depth of field and more latitude of dept of field so somethings are sharp once in a while.
Hey John, I am always a big fan of your work, but please, stop saying those stones are flat AF. Yes, they were , directly next to the grinding process, but those stone WEAR like, quickly. And as you pointed it, even if they are not crazy flat, they won't bite anything. I run through them like tictacs, some aren't even rectangular, but the action of those is only to "debur" flat surfaces. So I know that buying "precision" tools should help you being accurate and shit , but the thing with these stones, I just don't get it. Just buy a regular one. Keep it up anyway!
I'm not sure, but I think you don't completely understand the effect of surface grinding the stones. The stones not biting isn't a result of them being flat. It's because the sharp corners protruding from the particles the stone is made up of are ground flat. So there are no sharp edges or corners above the flat surface. Dings and burs get removed by the stones because they stick up into the space between the the grit and get sheared of. If you rub the stones against each other they clean themselves. Thats why they come in pairs. If used correctly they last a very long time. I hope my explanation makes sense. For further explanaition I recommend Stefan Gotteswinter or Robin Renzetti. They both have videos on this topic
"Diamonds do not conduct heat"- just killing me man!
As a lifelong Journeyman Tool & Die Maker (1983), I've gotta say that was a fantastic demonstration and tutorial. Many who are entering the trade need to watch the explanations on part cleanliness, wheel dressing issues, etc. I'd buy my knives from you guys without hesitation. Bravo!!!
Angelo seems to be in his element right now, very knowledgeable guy. Love seeing these new uploads the production quality just keeps going up.
We used to have our surface grinders completely isolated from the rest of the shop for dust and thermal stability. If you are concerned with either effecting the surface grinder operation, you might build a room around the grinder to keep the surface grinder as stable as possible. Just an idea...
Oh, ok. Walls are getting put up. Good. Next to that door you would have thermal stability issues from what I can see here 2,500 miles away.
Put a layer or 2 of newspaper down on the chuck before you put your parts on for the first opp. It will swell up with the coolant and fill the voids to help get the parts flat
The residual magnetism trick works too. When Suburban Tool demonstrated it on their youtube channel, they got flatness within 50 millionths.
You do know that you can get transfer blocks right? Grinding blocks that have narrower pole spacing's that basically tighten the magnetic fields of the larger poles. We have a table with the same spacing's as yours and I just use a block for thinner parts because the magnetic field just passes right through them otherwise. Lovely grinder though, I bet Angelo is having a blast using it.
Had the same issue with a different model with the coolant system also the drain gutter at the back of the table underneath the z axis guards is very narrow and prone to clogging up we do a lot heaver grinding from soft to 60 rc . Nice machine
Think of the poles like velcro, big spacing, big loops of flux projecting out of the table "hooking into" your part.
The poles are only slightly taller than they are wide so for your short parts you need a lot of short loops so they aren't over penetrating the part so to speak.
There are grinder wheels for polishing which are very fine grit and suspended in a slightly elastic binder. I think you could easily eliminate a lot of lapping with these and since they even make them for hob style gear grinding and polishing I bet they can hold a tolerance.
PS: the grinding nuts seem to agree that if you dress a wheel, stop it and restart it will expand differently everytime due to the centripetal force and loses it's roundness. BUT dressing a wheel changes it's balance due to irregularities within the material itself, so unless you have a grinder with live balancing capability you can never really have a wheel both perfectly dresses and balanced at the same time.
Sweet another video from Mr Grimsmo, can't get enough of these!
Awesome. Angelo seems to be right in his element.
Would be cool to see a zero point system with two magnet pallets on the grinder to do the time consuming setup parallel to the grinding.
The wider pole magnet will aid flattening of your grinding if your machining parts with a tight flatness tolerance.
Yes please. More videos about normal people surface grinding would be awesome. If I was able to make videos at work I would record tons of stuff I do on an Amada TECHSTER-64. It makes chisels.
it was the perfect time for this Vid ... worked yesterday on an old Okamotogrinder ... to see the cnc one is really nice !!!
Drill the holes in the lockbars first, using a single purpose magnetic chuck (you'll be digging holes into it, but they can be very cheap, and for drilling holes, it's not mission critical that it's an expensive one), the slap it on the CNC using the holes you drilled. That way, you'll always have the lockbar area static and unmoved. To affix them to the CNC pallet, use expanding grabbers (like a cleco clamp) that come from behind.
Endless progress...
Thanks for sharing and keep up the great work!
Much love from Switzerland
Great video and cool machine!
A question: why would you want to grind to that small tolerances? What is the point of that?
Answered in the video.
@@joenicotera2991 thanks, that makes a lot of sense. I just haven't seen a knifemaker use it before, only in production of tools for extrusion of plastic with really tight tolerances.
Love seeing Jon and Angelo together. Its a nice change. Sweet grinder too.
Hello Mr Grimsmo. I saw a lot of useful things in your videos. Please tell me, do you carry out the milling of the descent of the knife blade on heat-treated metal? Are there large deformations after heat treatment? Is it necessary to carry out another grinding operation?
at about 10:00 its mentioned that they use 99% isopropanol, i think this may be a mistake as they want to clean both polar and non-polar (dust mentioned). Pure isopropanol only touches the non-polar impurities.
Love that you have a harbor freight 1x30
Machining coolant has oils and stuff in it that lubricate cutting tools. Those same oils can load up grinding wheels. Grinding basically only needs coolant for heat and wash away swarf not lubrication. So you might want a grinding specifc coolant. Just something to watch for. Also, angelo probably knows but don't leave the magnet on for long periods of time without coolant flowing. It'll heat up which obviously can cause an accuracy problem but it can also cook the magnet and ruin it. Grinders are one of the grossest things out there and yet also require the cleanest setups. Its ironic and annoying but such it the grinding life.
I used to work in a tool room, we made multi stage progression tools working to 10% of component tolerance, our levels of accuracy were on average 0.0002” we didnt worry about dust, and stoning tables maybe this is hype maybe maybe justification of inflated prices but this is seriously OTT
If you wanted another good surface grinder to go along with the Okamoto I would look into a Nicco. It's too bad they're no longer being made but they are seriously nice machines.
I think if I am correct in order to get a longer life from your wheel make sure the coolent is not hitting your wheel directly
The irony is that bulk diamond conducts heat very well indeed.
As good as possible to be more precise
@@Sketch1994 that is less precise in fact
@@PraxZimmerman No, it's literal. Diamonds have the highest heat conductivity. There's boron arsenide, but that's a lab-only material.
Iron-y? Diamonds are not iron-y
@@PraxZimmerman But it's more indicative of how well than "very well"
Always glad to see a new Grimsmo video pop up in my feed!
How much is a diamond dresser? Just thinking if it could get destroyed in one session by not running the coolant wouldn't it make sense to hook up a secondary coolant nozzle pointed directly at the diamond with a solenoid and a macro in the controller so that there's zero risk of ever forgetting to turn it on?
So how long until a waterjet arrives? lol
Waterjet machines are great ??
As long as there Not in your shop.
They leave a nice coat of dust on everything in sight, forever cleaning If you like your machines.
@@weldmachine yeah I can only imagine lol every one I have seen they are caked in muck lol. I was just being facetious with John getting every machine to do it in house because I am the same way, they could put the waterjet in Erics building where the dirtier work is done and all the manual grinding and polishing is done
@@ClockwerkIndustries
Finding a space to install it would be a good place to start for sure. 👍
Sometimes it's best to pay other people to do the job for you.
A question i answered with a recent customer enquiry was ?
Why don't i do my heat treatment
in- house ?
Quality control was one main reason.
I am not a professional i can do it but can i guarantee it ??
When the Heat Treatment fails for what ever reason i feel a little happier that i am not totally at fault, LOL.
Plus the chances of failure are reduced if someone who does it as a job would have less chance of something going wrong.
Heat Treatment and Waterjet Cutting are two different topics of course but somewhat related as problems that can be someone else's responsibility, LOL.
Coolant absorbed into the wheel sucks. It takes a while to get it all back out and in balance again. Of course never run the coolant before running the spindle. the mist potentially coming off the flow and affect balance. Spark-out time effects finish and size and of course cycle time. It can also affect the condition of the wheel, which can lead to glazing. Skill and knowledge play a big part in grinding. We turned our surface and cylindrical grinders on 30 minutes before start of day. we also rand the table travel. We allowed our Kellenberger Cyl. Grinders 0.0005" on diameter(up to variable) for the first 20 or so minutes of the morning. Once they warmed up, they would hold 0.0002" all day. Never switched them off during the day either(maintain temperature).
Nice machine you have there, good luck :-)
The "hopping" you see in the steel is most likely caused by the poles in the chuck, not your grinding wheel. For the wheel to give you perfectly parallel lines would require it to be in phase with the movement of the bed. It's much more likely that your steel is flexing from the chuck.
Ive ground big solid blocks and got the same pattern on our grinder do to wheel balance
that finer pole chuck will give you way faster cycle times. my manual grinder i rough at .002 to .001 per pass. if i am really getting after it .005
Thanks for the PFG Stone shoutout! Yer crushing it!
Looking like you will need your very own waterjet too. Then you could have all of it in house! I'll assume you will be telling us something BIG is in the WORKS in about a month or so!
Whats up guy Daniel the tool and die maker, the key to success in surface grinding thin parts perfectly flat on a relaxed state boy this is gonna be a long one. The key word is relaxed state, which means the realationship between the mag force and part flatness in a relaxed state. In tool making i like to have flatness of
.0002 per foot. With parts like your knife blads on the first side you want your magnetic force to be light enough where the blake will hold its original warp at a relaxed state but not launch the part. There are a few ways around, it for a production run like yours you can make a plate out of cast iron the size of the mag with cut outs for the blanks like .005 per side bigger. The point of the plate being cast iron is increase mag force also surface area then u can run the mag force like but still retain holding.
Interesting video on a Rolls Royce of grinders. Just a bit of side info, diamonds are some of the best heat conductors in nature. The comment about diamond not conducting heat is incorrect. Also long parts can get temporarily straightened my the magnetic chuck if you aren't careful. I am definitely no expert, but have been watching videos of others who know a whole lot more, like Steve Barton over at Solid Rock Machine Shop and pulling tenths is tough.
im no grinding expert by ANY stretch of the imagination, a finer grit will induce a lot more heat / warping. have a look at Solid Rock Machine shops video on grinding wheels. i hope it helps
Pro tip: don't bolt the magnet down to tight, let one end semi-loose. Otherwise when it heats up and expand it will buckle up.
Highly interesting stuff, thanks for showing.
Flooding the Magnetic Chuck will make it easier to remove the parts without chance of scratching.
Only my experience for what it's worth ??
Your pai with the chuck... Story of my life in my job.
Cool grinder. Dialing it in for each part could take some time. Keep notes.✌
I'd look into a CBN wheel. They just work and don't break down as much as a traditional wheel.
The grinder being that close to an outside door, not cause for thermal expansion/contraction concern?
Theremal expansion rate on steel is roughly .0000006 per inch per degree, the knife blade isn't big enough for it to have a very measurable change
@@danielrogers6090 Good to know. I was coming from CNC mill/lathe world where thermal expansion will change the cut at the beginning of the day vs the end of the day.
@@vitalcarry hello buddy in a cnc mill or lathe environment the machine components are usually very long like the ball screws the longer the component, more variation. Thats y offset need to change throughout the day as the climate changes
Those roller blade wheels are the greatest thing ever if you floor flat. My chair almost rolled its way out the garage into the street lol
Hi John,
I have the old double wheels on my office chair and they are a PIA. Where did you get your wheels and did they come with stems and housings that hold the wheels? Any information you can supply would be appreciated.
BTW GREAT GRINDER !!!! enjoyed the video.
John
Amazon, just make sure you're getting the right diameter Stem for your chair (IKEA chairs have a non-universal size)
@@zaenbaker1427 thanks for the reply.
You could have all that Blanchard ground on the outside ....saved tens of thousands of dollars
How parellel can make the parts when you making such a big deal with the cleaning, sub 1 micron
What is the difference between ACC and PSG
Wish I could afford one of these knives, so nice.
yeah but titanium is not magnetic so how do you hold it in a magnetic chuck?
So, when are you putting the order in for a Waterjet machine, to cut your own blanks?😉
Those are messy things.
Unless you want to put it in the other building(grinding building) I wouldn't.
@@kkknotcool True, they are messy. They do have plenty of room in the finishing shop. A Waterjet, would pretty much bring all of their processes inhouse, which I'm sure they would prefer. But, I guess, it would depend on the economics of it.
@@brianwihowski1345 Economics is another thing. Waterjets are like 100 grand right? They are probably only gonna get a few hours a week of cycle time off the thing.
I don't know how you pay off a 100k machine on a few hours a week of cycle time on any machine.
@@kkknotcool Yeah, the cost, would probably make it prohibitive. I know, some companies make smaller Waterjets. But, unless they could use it for other parts, it might be cheaper to still farm it out. Still, it'd be fun to have a Waterjet...
@@kkknotcool I was just on Flow's website, since they seem to be one of the more popular Waterjet makers. And, they do make some smaller machines, and one that is fully enclosed. With Rask production cranking up, and probably other products in the pipeline, this could be a future viable purchase. Maybe, other uses for it, like Grimsmo titanium keychains, custom cases, etc. Hey John, if your listening, I've got other ideas for a discounted Saga...😉
Fuck. Me. Running. Surface grinding is it's own world, inside of machining!
I am not trolling. I love the look and feel of your knives though I do not own one. I hope to one day. I’m trying to understand how you are able to afford all of this incredible equipment when you seem to manufacture and sell so few knives.
I was wondering how many complete knives go out to customers on a daily basis.
I would think all the machines are on lease - he pays a monthly fee until the full price is reached + lease additions
@@chronokoks I started watching John years ago when I was looking for a milling machine. I came across this video with this guy in a garage explaining why I should buy this milling machine that he had converted into a cnc machine. I think that's what it was anyway. I think he wanted $3000 dollars for it. I'm not even sure if he was making knives at that point. and then the next thing you know he's unloading a Tormach & it's off to the races. I didn't buy the machine he was selling.
If you are only taking .0003 a pass, you should go with Borazon, redress it 3 times a year
I wanna get a cnc machinist job in canada
No, it's cold as hell here.
Try soaking the wheel before you dress it, it makes a big diffrence between Setups.
Btw.Diamond does conduct heat and you dont cut on a grinder, you grind
Great tip on the soaking...but it's still a cut. The grains present with a very negative angle and deform material till it fails, just with different angles and parameters. Think of the wheel as an infinite tooth burr with nano scale runout. Teeth wear crack and break, while the binder made flutes can clog and jam (which breaks the grain just as quickly as the tooth of an endmill would break if the flute was clogged).
You are not supposed to run carbide on a normal grinding wheel you have to get a specific wheel for it
See on YT Robrenz and Solid Rock Machining the latter on Tirolyt stones Angelo!
So dope
JG...Saunders should be so proud of you in this video...you look so much like an owner here and not the technician...although we know you want to :)
15:45 is this machine automatic?
Well yes, but actually no
interesting, tnx for shear
Cool
Kotex don’t leave any lent.
Hit up robin renz on TH-cam the grind master
Love the grinder and the explanations.
Video quality, not so good. Nothing is ever in frame, or in focus. Camera is always behind chasing the subject, and never in focus.
Go to a smaller aperture, greater depth of field and more latitude of dept of field so somethings are sharp once in a while.
Hey John, I am always a big fan of your work, but please, stop saying those stones are flat AF. Yes, they were , directly next to the grinding process, but those stone WEAR like, quickly. And as you pointed it, even if they are not crazy flat, they won't bite anything. I run through them like tictacs, some aren't even rectangular, but the action of those is only to "debur" flat surfaces.
So I know that buying "precision" tools should help you being accurate and shit , but the thing with these stones, I just don't get it. Just buy a regular one.
Keep it up anyway!
I'm not sure, but I think you don't completely understand the effect of surface grinding the stones. The stones not biting isn't a result of them being flat. It's because the sharp corners protruding from the particles the stone is made up of are ground flat. So there are no sharp edges or corners above the flat surface. Dings and burs get removed by the stones because they stick up into the space between the the grit and get sheared of. If you rub the stones against each other they clean themselves. Thats why they come in pairs. If used correctly they last a very long time. I hope my explanation makes sense. For further explanaition I recommend Stefan Gotteswinter or Robin Renzetti. They both have videos on this topic
Read up at PFG.GG.
have a look at Robin Renzetti's video about precision ground flat stones. it should clear up these stones' use.