Buying a 12x24 Okamoto Surface Grinder for our Machine Shop!

[@weebunnyhuny]

@nyccnc generally when grinding square or rectangular parts its best to place them on the mag chuck on an angle, this does 2 things, reduces the time on part with the stone therefore heat build up but also helps to stop so much coolant overspray

[@bcbloc02]

Funny to see a grinder back in the shop. I would say one thing about tribal grinder knowledge is in my experience grinders are still very much a finess machine. A good operator that knows the machine can easily get much better results out of it than somebody just coming up and following instructions.

[@malteser0212]

What I wanted to comment on Spencer Webbs comment concerning coolant/casting thermal capacity: Yes, water has 8.4 times the thermal capacity that cast iron has. BUT cast iron has 7.8 times the density water has. Thermal capacity is always weight related, so you have to throw those units around until you have what you need. If you go by weight then all's easy. Let's say that your grinder has 5000 lbs of casting. You'd need 70 gallons of coolant to have an equal thermal capacity in the casting as in the coolant. Do with that information what you may. But always check the units!

[@RambozoClown]

While not a replacement for a programmable X speed control, you can get a potentiometer knob with a mechanical 3 digit counter so you can get repeatability without changing any electrical properties.

[@nyccnc]

solid idea. thanks!

[@cnettrouer]

@4:00 Would it be beneficial to print a donut shaped label to go around the "X axis potentiometer" with hash marks similar to a watch? Therefore it would take the guesswork out of knowing if you set it at 9:30 or 10:00? This would add a level of resolution to your repeat adjustments in future setups.

[@Abom79]

Awesome machine and great video John!

[@simonhopkins3867]

Wow your toy collection keeps growing. It's amazing what you've achieved.

[@MrCrankyface]

Really cool machine! Regarding the iron/water heating. Water has a specific heat capacity of ~4200J per kilogram and kelvin(ie 4200J to raise 1kg of water by 1 degree). "Generic" cast iron seems to be around 460J per kilogram and kelvin, so 10 times sounds about right. Makes perfect sense to also heat the water directly instead of running the machine for long enough to heat everything up! Granted that the mass of your coolant is a lot less than the mass of your machine but much like a car coolant loop it will help equalize things faster.

[@hgbugalou]

Can't go wrong with Japanese tooling. Even their low tier stuff is better than a lot of other mid tier brands.

[@jlr0884]

I'm a high okuma fan and I approve of this comment

[@adamthemachinist]

That is a nice looking grinder! Enjoy the rabbits hole of abrasive machining

[@hereticswissery9010]

Did you find much rabbit on your way down?

[@465maltbie]

I thought you had a grinder already? Thanks for sharing. Charles

[@James_Norris]

Great looking machine! Just a thought regarding the X axis travel potentiometer - a little arduino project, Could you 'fabricoble' a method in which you take the signal from the potentiometer and display it on a seven segment style display? That way you have numeric value to tie up with your setup sheet "set x axis feed to 65" for example.

[@kevink6420]

Sharpie takes 3 seconds, just saying

[@bernhard_derProtoTyp]

if its really just a potentiometer, it would be pretty easy to wire in a box with a few fixed resistors that you can activate with buttons for production mode. or even industry 4.0ing it with a little microcontroller. I see why it sucks but maybe a thought for process reliability in the future..?

[@JosephMostowy]

Good choice, every shop needs one

[@jeremyl.7563]

Very cool. Thanks for sharing. If you put a Dedtru fixture on there and a potentiometer, boom you now have a cnc grinder for a fraction of the cost.

[@car9167]

What happened to the other big surface grinder you had?

[@mark_30_60]

Nice vid. Can’t wait to hear about your experience with the UMC 350HD!

[@trevoradams8675]

This is fantastic info thank you as always! An Okamoto has been on my shortlist. Just pulled the trigger on the Genos m560-V. Could I ask if you have a shell mill you might recommend for a good finish? I'm hoping that this will help me to achieve a smooth finish on my folder flats. :) Or if anyone else out there has any ideas.

[@JayDee28]

I thought you’re doing mainly Aluminum?

[@95dodgev10]

The necessity of cylindrical grinders has changed just like with surface grinding. Cnc lathes can repeatedly hit tolerances and surfaces finishes now that it eliminates alot of post cylindrical grinder work. The exception to this is getting into big parts as the majority of the cnc market is pretty small machines.

[@ianbresnahan1808]

Hey!! Im curious what the option is for the table dresser? Ive been told by my Okamoto dist. that the table dresser isnt an option??

[@aaronberge1664]

Great machine. We routinely hold .00004 flatness on ours!

[@richhuntsd12]

Nice Video John. I think this machine will work out good for Your parts. I used to have big Mattison Hydraulic Manuel machines. Super heavy and holding a couple tenths was not a problem even for a 60” machine. I really like your choice but I am surprised you did not go with the full CNC model. I hope it works out good for you

[@hereticswissery9010]

Form grinding for me is the most efficient form of grinding as you can do shape with an inexpensive grinding wheel and plow tru as much part you can put on the chuck

[@cschwad559]

I love my surface grinder great for precision

[@cpprbusa9470]

What are you running for coolant?

[@SpencerWebb]

Nice NOZ there, bud. 🤓👍

[@曾子建-f5e]

The magnetic chuck looks a bit weired! Seems to be rotated 90 degree?

[@flyingjeep911]

Have that same machine at work. “Tribal clunkiness” is a great phrase for the control.

[@nyccnc]

LOL

[@jlr0884]

There a video some where here on KZbin about the world most accurate "cmm" un imaginable tolerances I think it was built under a lake some where cause even cosmic rays would affect it. Vacuum sealed environment if a door was opened they'd have to wait several hours for the pressure to adjust.

[@ChozoSR388]

Any news on Number 5?

[@maciejgren3122]

Looks like a great product. Wonder how Pierson feels about it LOL.

[@wolffengineering7038]

About the same as the guy Pierson ripped his design from.

[@maciejgren3122]

@wolffengineering7038 that’s interesting. Wasn’t following neither of them for a long while so lost track of what’s going on. Which product Pierson copied from him? Just out of curiosity. I like both of these guys.

[@wolffengineering7038]

@@maciejgren3122 the ball lock mechanism has been around for ages. Patents expired long ago. It’s all up for grabs, and your competitor’s margins are your opportunities.

[@papa_woody]

Now you need a banchard grinder.

[@life.is.to.short1414]

Wow.. in Thailand..

[@OpaqueWindow]

Now we have two of rhe conversational (semiauto) Okis no idea how to use them yet lol

[@tajnepoufne4865]

When you're dealing with thousandths of a millimeter you cannot afford for the high-precision bearing of your grinder to change temperature. If you do this every time before heating, it may vibrate Of course, this will change the quality of the final surface, plus its size may be different from what you set.

[@AndrewBoraas]

oh man Id think that someone who has toured a ton of shops might be dangerous when designing processes

[@larrycleeton]

Take this as constructive criticism. Equal parts machining and talking head. I enjoy your take on the business aspects and your channel is really focused on that. However it would be even more interesting if we saw machines in action while you talk.

[@KennyMustSurvive]

These machines use a lot of electricity

[@Windows350]

try hand scraping it then

[@bcbloc02]

@@spike1670 I watched a video of some people rebuilding bearings in the sand with a stick and hand grinder. While it is true they had a bearing when finished it also would likely only last a few hours before failure. A lot of these pakistani truck type videos I believe are made simple so people will watch them if they actually use the stuff they butcher together likely somebody the next town over is making the same video tomorrow. lol