“Shop Notes”* • Making a grinding arbor nut • Adding spring steel to a dial test indicator for alarger surface • (5C) collet held backstop in the lathe with the chuck on • Tapping head is a SPV (Spintec) SA-0E. I can't find the model on their website. • 3M 467 Adhesive Transfer tape: McMasterCarr (60yd): www.mcmaster.com/#adhesive-transfer-tape/=19s264m Amazon (.5 in/20yd): www.amazon.com/dp/B007Y7CQ1S/ (other sizes): www.amazon.com/467MP-Performance-Adhesive-Transfer-0-125/dp/B00P26Z04I/ 3M's website: www.3m.com/3M/en_US/company-us/all-3m-products/~/3M-Adhesive-Transfer-Tape-467MP?N=5002385+3293242532&rt=rud • Indicating in • Tip about aligning to your spindle for good repeat concentricity. • Opening a dressing a diamond wheel with dollar store sharpening stone and a stick of moly(dinum?) *Not affiliated with any manufacturer or supplier.

Robin, your knowledge brought to this community will outlast generations. The way your brain is geared is something to be admired, and your attention to detail is flawless. Thank you my friend!

@ROBRENZ

4 жыл бұрын

Wow, thanks

Any day you learn something, it's a good day. Any day Robrenz teaches you, you get a degree.

I love seeing that you've posted on KZread! Your Instagram is great, but it's nice to see everything in such depth. Thanks for posting. 👍

@ROBRENZ

4 жыл бұрын

Glad you like them!

@anthonyjones657

4 жыл бұрын

Was going to say the same thing!

I wish there was enough Robenz content to watch 24/7

@erickieffer8440

4 жыл бұрын

Me too, but then I just rewatch the previous ones too.

@dannymaciejewski

4 жыл бұрын

Just keep watching the old ones!!!

"A problem well stated is a problem half-solved". I think that's why I find your videos so educational/helpful/inspiring/enjoyable. Thank you.

@ROBRENZ

4 жыл бұрын

Great to hear!

You are a great teacher. The way you explain things, just enough detail without beating the dead horse. Thanks.

Thanks Robin. Most of your work is on a level totally inapplicable to me, but I still enjoy and learn from every minute of it.

I love these little bite sized toolroom tips!

1st... maybe. Lol Another great video. Took me a few years to learn all the tips you just went over in a 15 min video. Would’ve saved me some time watching this first. 👍

@ROBRENZ

4 жыл бұрын

Second!

great video!

@ROBRENZ

4 жыл бұрын

Thanks Tony. ATB, Robin

@anthonyjones657

4 жыл бұрын

Bout time for you to drop a video. I smell a collaboration. Maho? Make a super tight tolerance vice for the maho. Maybe a hydraulic vice. I really appreciate both of you guys. I wish i had equipment at home to make videos

i often use a feeler gauge blade to "bridge "when indicating. very nice and as always loaded with learning

We used a similar multi-point jacking bolt on some specialized equipment that needed huge holding forces, but had no room for standard wrenching and torque that would be required with a standard bolt. Did the math and found to get equivalent torque on a standard bolt, we'd need a 17foot cheater bar. With the super-bolt, a 6in long hex key was enough to get the same result. Amazing.... I always learn something fascinating when I watch one of your videos. The spring steel "pad" alone is pure gold. Keep up the great work.

@ROBRENZ

4 жыл бұрын

Thanks and correct, I didn't invent the idea I just applied it in another application.

@mikemorgan5015

4 жыл бұрын

@@ROBRENZ I didn't mean to imply that you were implying that you were the first to use this. Simply to discuss the incredible amount of force this method produces. I'm not a machinist, but love the craft. Of all the amazing things I've learned here, the one I most often use is Goop thinned with toluene.

Nice tip on the wheel dressing, love the nut idea. Thanks Robin for sharing.

@ROBRENZ

4 жыл бұрын

Thanks for watching Randy! ATB, Robin

Robin, thanks for another great video, I really like this style. The long form videos are great, only downside is sometimes I want to show a technique to a coworker and can't remember where you showed it. You're also the reason we have a Harig surface grinder and D-bit grinder. One question-you come up with very creative ways to work around not having a tool changer VMC, but wouldn't it be easier to get even something small like a Minimill? It wouldn't replace the ProtoTrac for big stuff, but it sure would make life easier for all the spot/drill/tap operations and projects like the boring bar. You're doing things now that we mere mortals couldn't do if we were handed a 5 axis Kern, I can't imagine what would happen if you had a little machine like Adam Demuth's Mori tucked in the corner.

Fascinating, your attention to detail and mindset. Thank you.

@ROBRENZ

4 жыл бұрын

Glad you enjoyed it!

New Renzetti vid -> smash like button. (same on instagram) I don't even do any surface grinding but every time you speak I learn like 10 things and it is very appreciated. Your work is probably out of my league, but watching your setup workflow and problem solving approach is highly informative. Thanks again Mr. Renz.

@ROBRENZ

4 жыл бұрын

Awesome thank you!

What a great detailed description of how A master works. Thanks Robin. 👍👍

@ROBRENZ

4 жыл бұрын

Glad it was helpful!

It may be a small thing, but I appreciate knowing where a video is going before watching it for 15-30 min. Thx.

@peterfitzpatrick7032

4 жыл бұрын

Thats why there's a description section... 😎👍☘🍺

The master of methodology. Thank you for the excellent tip.

Thanks Robin, Ive had a Hardinge toolroom lathe for ever and never thought to leave the collet closer in for use as a stop. Unbelievable that I've never known that trick. You never stop learning in this trade. Thanks for sharing

You are a true craftsman. It's a real pleasure to see your work.

@ROBRENZ

4 жыл бұрын

Thank you!

You are the capo di tutti i capi of the KZread machinists community. You should have 2 million subscribers...

I always learn something from an R.R. video. Thanks for taking the time to make all of these videos.

I've been doing this tool-making stuff a long time (since we worked Dunnington together) but I always learn something new from your videos. Thanks.

@ROBRENZ

4 жыл бұрын

Thanks for watching Rob!

Thanks Robin, recently bought a wheel like this and have yet to try mounting it, you have highlighted the problems I'll face and given me some solutions. Much appreciated, looking forward to tip #3.

Drop everything, I can mow later. Robrenz has new video! Great stuff!! Thanks! Fred

@ROBRENZ

4 жыл бұрын

Enjoy!

I like your back up piece held in the collet. So much other great information. Thanks

A buffer for the gauge is a really good idea. Being able to true up one of those wheels by adjusting rather than dressing seems like a huge timesaver.

@ROBRENZ

4 жыл бұрын

Thanks Brian! ATB, Robin

This video was like a really good movie I had to watch it three times to get everything. Wow, very well done. Thank you.

@ROBRENZ

4 жыл бұрын

Glad you enjoyed it!

Man, Your IG videos are amazing, but Your YT videos are pure gold. I know if you're a machinist and also YT'uber you will screw up machining or making videos, but please, keep this videos on YT going.ATB Robin!For metric folks - 0.0005" is like a little bit over 10 microns

@amundsen575

4 жыл бұрын

I think you mean .00005"

@piroman16tnt

4 жыл бұрын

Obviously. Thanks and sorry for a typo.

Interesting and informative as always. Thanks Robin.

@ROBRENZ

4 жыл бұрын

Glad it was helpful!

Robin, this "Toolroom Tip" is full of good information. I'm looking forward to your next video!

@ROBRENZ

4 жыл бұрын

Glad it was helpful!

Your high precision machining gives a lot of insight of factors comming in to play for slightly rougher jobs too, I assemble industrial machinery and your attention to detail really makes me think twice about what i'm doing. Thank you! To my fellow subscribers, donate to what you consume too, make it worth it !

Educational as always, thanks for sharing the knowledge Robin!

Always learn something from your videos Robin, Thanks for taking the time to share. Gary

I know this video has been up awhile, but stefangtwr pointed me to it and I followed the steps to true up my shars diamond wheel. I even drilled and tapped the ring on a ProtoTrak. Worked great, thanks Robin.

@ROBRENZ

Жыл бұрын

Thanks for sharing!

Another good reference video... Thanks for your time and care, Pierre

I just recieved my first grinding wheel yesterday. This video pretty much answerd all questions I had last night about mounting it and dressing it. Timing could not have been better. Really like the tip about the metal strip you mounted on the dial indicator.

@vallelungak

4 жыл бұрын

This is really only for diamond or cbn wheels. A standard vitrified abrasive wheel would just be dressed with a diamond point.

Your timing is great. I picked up a moly stick a couple of weeks ago and have not used it yet. I feel more comfortable using it now. Thanks for sharing.

Thanks Rob, glad to have spotted this one. Better late than never - always good to learn.

Thanks for sharing. Your videos are GOLD.

Amazing detail and exceptionally useful narrative as always. Thank you!

Just another great video Robin. I have come back and watched this a couple times. Phil

Thank you Robin, Amazingly timely, almost, but that actually helped me Focus ( you b) on the lesson! Just did a small run of precision stones and had to dress a new Norton 13mm wide diamond wheel. Went with what I knew and used a Norton carbide dressing stick to true and Alox stick to open. Like you're suggestion better How does the sticky cold rolled do in comparison to the Molly? And that hub, Hubba Hubba hubba. Had to do it, sorry. But, yep, that's brill. You could do the same on the vitrified wheels with that washer taking the grubbers. Lots of hubs, one for each .... Thanks again Robin, keep safe.

I once did a study looking at resin bonded diamond wheels under a powerful microscope, comparing those that had been ‘opened up’ using a soft dressing stick with wheels where this was skipped. I was just barely able to discern the ridges of resin directly behind each individual grain of abrasive, and valleys on all other sides of the grain where the soft abrasive dressing stick wore the resin away. I think if I had more time to experiment with dressing procedure I could have made it even more pronounced, but it was interesting nonetheless.

@sealpiercing8476

4 жыл бұрын

Microscopes are a great shop tool for seeing what you're doing, with abrasives especially. If you can just use your eyes, a lot of great techniques turn from spooky tricks to blindingly obvious.

Nice job Robin! Steve

Excellent video Robin.

Hi Robin, hope this finds you doing well. Can't thank you enough for sharing this info! I need to grind the carbide feet on an indicator stand I built, and just purchased my first diamond wheel to do so. Your video is going to be incredibly helpful in setting up the wheel properly. The tips on the arbor nut set screws( and spacers ), and the spring stock for the indicator probe are priceless!

Great video and I learned something. Thanks for the video.

Absolutely great tips. Thanks Robin.

Thank you for the video. I love these tips . This method looks a lot cleaner than my brake dresser that thing makes the biggest mess

Great timing, looking how to dress my wheel to make my precision ground stones this week. As always , great content.

Robin, awesome video! I have always wondered how diamond wheels are dressed true. I have been wanting to thank you, I am always challenged to consider WHY materials and objects interact and behave the way they do. I love your analytical thinking, it has made me a more professional tradesman! (Plumber) Thanks👍🏻😀👍🏻

i always learn something from your videos. or at least re-learn something a different way. i doubt you could ever make too many of these.

Thank you for sharing your knowledge of dressing a super abrasive wheel.

what a wealth of information, thanks, shooting star machine, candler nc

Great video Robin. Always a good day when I see you have a new video out.

@ROBRENZ

4 жыл бұрын

Glad you enjoy it!

Love your work Rob.

You are on a different level Robin.

I just reviewed this video again to see why I didn't get the results I should have gotten. It was the washer behind the 6 screws and relief on the hub to get more room to move the wheel around to get better alignment on the diameter of the wheel. Thanks for explaining this process online.

I may never need to do this setup on a grinding wheel but the tricks with the spring steel are interesting . I think that precision grinding has been overtaken by new EDM Wire cutting so this type of tips & tricks by the older class of toolmakers get lost. Thank You

@zumbazumba1

4 жыл бұрын

EDM is fascinating technology but it will never replace grinding -its slow ,machines cost arm and leg ,its hard to find a good workforce that knows how to work on it ,amount of power those machines use is high.Its first used in 1970's but its still unicorn of the machining world.Compared to a CNC machines like milling machines that are commonly used today in large industry and hobby garages ,its way behind in mass use and its only 12 years younger than a cnc machine.Grinding is used since the iron age 2500 years ago when a dude used a rock to sharpen a axe and it will stay for that much probably.

@billbrennan8405

4 жыл бұрын

zumbazumba if you read closely I was talking about Wire EDM machines . The technology is amazing as it can cut complex geometry shapes as a high rate of speed VS the old cabin electrodes of the early 1970’s . I have seen carbide parts of 4 to 5 pcs cut at different locations that have a slip running fit with a 3 to 4 micro Ra finish. parts were produced in hours. Sounds like you need to checkout wire machines as they are slick. Hate to say this but CNC machines have left manual machines i the dust for speed, fit, finish & time to produce. Back in the mid 70’s i worked at Burke tool and Fred purchased. Moore CNC tape Jig Grinder this machine ran rings around a Harig grind fixture on a manual grinder. Sorry but this is a fact ! .

@Gottenhimfella

2 жыл бұрын

Wire EDM is not very versatile. Parts cannot have complex topology, but must be composed of geometrically primitive surfaces of revolution or extrusion, and can include no fillets or concave edges if these do not align with the wire, or any features with more than two faces which meet at concave junction, to name just a couple of examples. The rolls for a rollforming machine, for instance, are not suitable candidates, despite being simple solids of revolution. They are also perhaps the most maintenance-intensive items in a modern toolroom. It is fantastic tech, but it has not replaced precision grinding, and is not likely to do so.

Nice bag of tricks. I got comments, of course. I like the contact point protecter trick. Back in the day, I superglued a strip cut from feeler stock to the DTI. Reliable double side adhesive was unavailable. You young whippersnappers have it easy. I've used mild steel to dress diamond wheels many times. Never considered moly but moly barstock is scarce in these parts anyway. Dedicating wheel hubs to a particular wheel has been around for generations. However multiple hubs are expensive/tricky to make accurately for most shops. For that matter quick interchange of grinding spindle hubs is pretty much a concern for the tool room and sharpening lobby. Sopco is a revered name for grinding wheel hubs for those interested. They make hubs for most grinder spindles for a fair price (about $100 for a Cincinatti T&C grinder hub). They're worth the money and turn-around time is short for pupular hub configs in stock. Well, that was my experience 25 years ago. Good presentation Robin.

@ROBRENZ

4 жыл бұрын

Thanks Forrest!

Excellent useful content as always Robin! Good to see you keeping busy even in these times!

👍more superb robrenz engineering! Like the key way reference idea. Thanks for sharing!

Thanks for the great video Robin! You're always so informative and fun to watch, as you have good techniques and ideas. I'm setting up a shop in my garage to learn and to help teach my kids since they don't have shop classes anymore. I've been buying basketcase/dirty/ugly machines since that's what I can afford on my limited budget and the kids and I are cleaning them up and hoping we can refurb them to be useful, good machines. I got a Boyar-Schultz 612 surface grinder and just got it wired up. So much to learn and to explore!

@ROBRENZ

4 жыл бұрын

That is good to hear!

Good stuff Robin. That is exactly how I sweep in parts using a DTI... I try to explain it to my operators and of course, I get blank stares.

I just decided to keep my Macson surface grinder after 20 years lying stripped down and idle despite the fact it takes up some room and these tips are really gems especially the nut that holds the wheel.

Always learn something from you. My surface grinder has been idle for a few months. Maybe it's time I get some practice in. Thank you Robin

Thank you so much Robin! I learned a lot of good tips and ideas from your videos.Although there will be some language barriers, they have been answered in the comments and thanks to everyone in the comments section.

Brilliant Robin, love it!! Cheers, Doug

Enjoyed that! Thanks very much,even though I am a wood worker,I love the way you describe precision metal workings.Have a nice day!👋👍🇩🇰

@ROBRENZ

4 жыл бұрын

Glad you enjoyed it

I made one of your DTI fine adjust heads and just love it. One change I made was to add a ball to the mag base arm. With a couple of side plates to make a stiff joint between head and arm there is sufficient freedom of movement to fold the DTI back along the arm protecting the stylus when not in use.

Great information. Thank you for sharing.

I go through withdrawals every time you post - love it ;) No longer have access to machining , started out in automotive , yrs. alter gunsmithing . Now electronics repair [ loved your Kelvin clips ] and gold recovery from electronics not repaired , so chemistry also , refining . Use to do underwater suction dredging gold mining in No. Cal. 70s-90s . You seem have varied interests also , machining & electrical , what else . Thanks again

@ROBRENZ

4 жыл бұрын

I remember you from the EEVblog forum!

New to surface grinding. Both of your tool room tips videos are great for me. Thanks.

@ROBRENZ

3 жыл бұрын

Great to hear!

Faster than my way, that is certain. Thanks for the demonstration. I've been using my homebrew brake tool but will try the molybdenum sticks next time as the dust created by the brake device makes it a solid second place behind this method. I also haven't been dressing the resin back with as much frequency as you show here. Thanks once again!

Great idea. Cheers .

Thanks Robin, great content as always. Keep safe!

@ROBRENZ

4 жыл бұрын

Thanks, you too!

Good work - thanks for the very helpful hints.

Robin, did you leave the ring you put the six holes in annealed?

@ROBRENZ

4 жыл бұрын

yes

Thanks for this. Just what I've needed all along.

@ROBRENZ

4 жыл бұрын

Glad it was helpful!

excelent video as always, ive had a diamond wheels sitting and waiting to be trued up, now i have a better idea on how to do it, thanks robin

Thats a very good way! Thanks for the tip!

Answer to questions I have had for years thanks

Great information and presentation, thank you!

at first I thought this was for axial runout. another super precision tip!

Excellent excellent vid, brilliant use of spring steel combined with indicator and pear tip to remove cosine error, with the extra detail of creating a rubbed flat that effectively creates a larger true contact patch. When you drilled the nut however, a more stable method to add more contact points with your vice would have been to add a v block against both jaws of the vice- creating 4 points of jaw contact rather than 2- and leaving less chance of deforming the nut from clamping, as well as less chance of slipping or rotating when drilling. Otherwise great vid as always! I need to get a grinder for home use, I only have a Harig 618 and a newer Okamoto at work to use.

I've bought Chinese diamond wheel that were catastrophically out i faced a pocket in a blank bit of scrap then dropped the wheel in and over bored a new bore and faced the sides. made a adaptor and perfect result

Thanks for the video.

Fantastic tip! That I will definitely use. Thanks.

Great stuff. But I especially love the adapter on the indicator. That would be useful in a lot of instances

@Gottenhimfella

2 жыл бұрын

Indeed. A great alternative, for instance, to using a conventional "elephant's foot" style end plunger on an axial indicator.

Thanks for the tips Robin, I've been using the dialing in 50% on my jig grinder for some time but I still need to true up my diamond wheels and your technique will be helpful.

@ROBRENZ

4 жыл бұрын

Glad to help

Thanks for sharing that Robin - Cheers Cliff

@ROBRENZ

4 жыл бұрын

Thanks for watching Cliff! ATB, Robin

Cool! I had no idea that type of wheel could be dressed, let alone so simply. I always thought you just had to accept whatever the manufacturer did. Sort of like carbide tooling, I always thought that you had to just accept it. Stefan has a cool video where he actually machines the carbide itself in the lathe.

Awesome, looking for a way to apply this to my old lathe 😅

Oh ya robin whenever you have a minute. your video's are alway's a real nice suprize. Those resin bond wheels can be had on ebay cheaper than you can get a green 6" 1" hole. The 3" if there gonna last me forever buy 2 crash one specials from china would still be a new buying experience A veriable speed motor drive and a drill motor sized motor is where i'm going to start . and make it so its a tool post grinder / mini K-O Lee has vari speed and a hub system and flood coolent the diamond cuts sooo cool but Aluminum oxide heating and cracking tool steels carbon steels and the dust That vari speed drive is gonna power my HHO cell Thats what I'm doing right now is digging up and cutting off parts pieces Having a torch that would heat a 3/4" steel bar orange and you store no flamible gas and some of the other aspects thanks robin good to hear from you

Another awesome video. I could watch your stuff 24/7. Always learn so much. Where is a good source for moly stick. Didn't see any on McMaster and everything on eBay seems to come from China.

Thanks Robin! Can you show us your rotary grinding fixture and demurring machine next? Thanks.

Yo no entiendo lo que dice porque no hablo ingles pero veo lo que hace y es maravilloso gracias Mr Robrenz