PFG Live

Tolerance is Money, Friend! - Chasing tight tolerances which are not needed is a disservice to your client... and to you. The Tool Your Grinder's Hydraulic Table Needs - Have a grinder with an automatic hydraulic table? Here is a tools which I have been using for years, which improves process reliability and consistency. Web(b)hooks, AIO and Discord: A Dev Story - Ever file a ticket with tech support? How'd that go? How about finding a bug in the service you are paying for, and getting it fixed in less than an hour? Yes, it did happen. Links for products/designs mentioned are at pfg.gg/links Follow me on Instagram at "spencer_webb_nh". ("PFG Stones®" is a registered trademark of Kinetic Precision)

Very Flat ... Magnet?! - I respond to a client request for a flat surface on a magnet. There were some surprises. Mandatory Grinding Tools - What tools should be within arm's length whilst working on your surface grinder. Besides your tea. HackRH Update - We're slowly improving battery life even further, and using Adafruit IO to good advantage. Links for products/designs mentioned are at pfg.gg/links Follow me on Instagram at "spencer_webb_nh". ("PFG Stones®" is a registered trademark of Kinetic Precision)

Breaking News! -- a report from the New York City Marathon, LIVE! Instant Kiki Collab - A fast collaboration on 3D printing happened. It illustrates the power of the 'net. Linear Rails: $12 or $450? Yes. - An unexpectedly rich lesson, from unannounced guest Robin Renzetti ( @ROBRENZ ), in bearings, linear and otherwise. Get your notebook. --- https://www.printables.com/model/419247-calibration-kiki https://www.malloywind.com/articles/what-is-heathcote-slip https://www.amazon.com/Introduction-Tribology-Bharat-Bhushan/dp/1119944538/ --- Links for products/designs mentioned are at pfg.gg/links Follow me on Instagram at "spencer_webb_nh". ("PFG Stones®" is a registered trademark of Kinetic Precision)

Trebuchet Week: Make 'em Think - The kids design, build and test a trebuchet. The goal? Hit their Physics Teacher in the face with a water balloon at 35 meters. We are joined by that teacher, Mr. Pat Kaplow of Windham High School. A Surface Grinder Finish Puzzle - I worked with John Saunders @nyccnc to noodle out a weird surface finish puzzle. I consulted with @ROBRENZ , and we had the epiphany. Another 3D Printed Grinding Jig - holding gage pins for end grinding... to use as a cutting tool?!??! We are joined by Ike IG: @unixcarbide, and @unixcarbide6724 . Links for products/designs mentioned are at pfg.gg/links Follow me on Instagram at "spencer_webb_nh". ("PFG Stones®" is a registered trademark of Kinetic Precision)

I Wood If I Must: I help a team of young'uns from the HS Physics class to build a trebuchet. Outside the shop. Learning From Pythonistas - The RH Sensor project hits new milestones, and is ready for polish and packaging, thanks to the contributions of other software pros. Sensors Now Publishing to AdaFruit IO - The sensors are now publishing via MQTT (?!) and we can bring up graphs, charts, and real-time data!! Links for products/designs mentioned are at pfg.gg/links Follow me on Instagram at "spencer_webb_nh". ("PFG Stones®" is a registered trademark of Kinetic Precision)

RH/Temp Sensor Reports On-line For a Year On a Battery! - A software/hardware breakthrough and a hardware guy learns Python. Current measurements say we have arrived at the goal. Boring Tool Breakage Analysis - I broke my boring tool. May as well learn from it. 3DP: Prototype Fast and Smart - My tricks for empirical prototyping of features of larger projects. Links for products/designs mentioned are at pfg.gg/links Follow me on Instagram at "spencer_webb_nh". ("PFG Stones®" is a registered trademark of Kinetic Precision)

Cardboard Aided Design (CAD) - Prototype #1 needs to be right now! Fixturing Weird Grinding Jobs - You want me to grind WHAT?!??! Sensor Update: More Betterer - We have smoothed out our software, and are getting great battery life. How I learned to love error traps. Links for products/designs mentioned are at pfg.gg/links Follow me on Instagram at "spencer_webb_nh". ("PFG Stones®" is a registered trademark of Kinetic Precision)

Guest: Adam Demuth! - A magnificent Toolmaker and teacher, Adam brings his wisdom. Surface Grinder Workflow - By request by a watcher/listener... consumer? Feather/SHT4x Battery Life: Unlocked! - We lost some hair figuring this one out, but we may have achieved 60-day battery life versus 18-hours. We explain how. Ford F-150 Lightning: 10K Report - Yep, it's going in for it's first checkup. See what my squawks are, and how the electric life has been. Adam Demuth on YT: @adamthemachinist , and on Instagram: "adam_the_machinist" The powder coating tape for the top of the demagnetizer: https://www.mcmaster.com/7630A23/ Links for products/designs mentioned are at pfg.gg/links Follow me on Instagram at "spencer_webb_nh". ("PFG Stones®" is a registered trademark of Kinetic Precision)

Feather Development Stand - The STL files are in the links page. Super useful for desktop development. Sensing: Temp, RH, Battery - getting the most out of the SHT4x, and the onboard battery conditioning chip. Notifications, Network Time, more! - We learn about ntfy.sh and use it for notifications from Feather to Phone. We use the NTP protocol to synchronize the time in the Feather. This is going to be a super useful tool all around the shop. Links for products/designs mentioned are at pfg.gg/links Follow me on Instagram at "spencer_webb_nh". ("PFG Stones®" is a registered trademark of Kinetic Precision)

Talking SHT4x: Secrets revealed! - The Sensirion has a heater in it for a reason. We uncover the reasons as well as a total lack of suggestions as to how to use it. Hardware Guy Learns Software? - Adafruit endeavors to make it easy, but it's a bit of a labyrinth. I get help. Prepping a Very Small Well - I need help. I am fixing a broken spoon. A very expensive scientific spoon. And I have been procrastinating masterfully. Links for products/designs mentioned are at pfg.gg/links Follow me on Instagram at "spencer_webb_nh". ("PFG Stones®" is a registered trademark of Kinetic Precision)

New 1st Layer Graphics Hack - This is why we have a Discord server: Colaboration!! Thanks, Dylan at Proteum Machining. @proteummachining7039 Advanced Sensors Capability - We unlock the Adafruit cloud solution with no coding, and we start learning how to code for the next step. New Dessicant Procedures - Just when you thought we had dessicants and their use figured out... I change my mind. You'll like it. Kiridashi Thoughts - I have been wanting to make a Kiridashi for a while. I think I have my recipe. And.... We say good-bye to the PRUSAs, add styli to the Bambus, and put some goodies in stock. Links for products/designs mentioned are at pfg.gg/links Follow me on Instagram at "spencer_webb_nh". ("PFG Stones®" is a registered trademark of Kinetic Precision)

Adam Balogh - Crushing It In Precision Machining Education (98%) Relative Humidity Remote Data Collection Unlocked - Adafruit has some nice tech, and we are testing it. (2%) Yeah, we went down the rabbit hole with Adam Balogh of Laney Machine Tech. We'll get back to data collection next week. The book that was referenced: Precision Machine Design, by Alexander H. Slocum. (ISBN-10: 0872634922) Amazon link: https://amzn.to/3sIdl7m Link to MIT Open Courseware of same name: https://ocw.mit.edu/courses/2-75-precision-machine-design-fall-2001/ Links for products/designs mentioned are at pfg.gg/links Follow me on Instagram at "spencer_webb_nh". ("PFG Stones®" is a registered trademark of Kinetic Precision)

Improving the Products - we discuss small improvements which is a never-ending process Registered Trademark! Why? - over a year of waiting... why it's valuable. B-200 Production Wrap-up - lessons learned on batch number three. Links for products/designs mentioned are at pfg.gg/links Follow me on Instagram at "spencer_webb_nh". ("PFG Stones®" is a registered trademark of Kinetic Precision)

Software is Hard? Where? - We take the dive into Adafruit Feathers and our favorite humidity sensor. Torque Your Gripper - Wrapping up the 2023 B-200 Balancing Ring production run - Lessons Learned Twisted Concentricity - We collect data on the BS-8 Balancing Stands, and find surprises. Good ones. Links for products/designs mentioned are at pfg.gg/links Follow me on Instagram at "spencer_webb_nh". ("PFG Stones" is a trademark of Kinetic Precision)

BS-8 3DP TIR... So Far, So Good If it's crazy, and it works, then it's not crazy. Finalizing Our RH Standard - $30 for 1.8% RH accuracy down to 0% SLA Printing a Haimer tip for Saunders Machine Works ( @nyccnc ) Links for products/designs mentioned are at pfg.gg/links Follow me on Instagram at "spencer_webb_nh". ("PFG Stones" is a trademark of Kinetic Precision)

Balancing Stand Calibration - How do you know that it's as good as one costing 5X? We're gathering data. Hygrometer Calibration - How to get 2% accuracy for $30, and keep your filament dry. Bambu Calibration - They release new software and firmware, and we get a calibration gift. ErgoWedge - Fighting to Save The Elbow... and attached stuff. Grinding Red Alert.... and more..... Links for products/designs mentioned are at pfg.gg/links Follow me on Instagram at "spencer_webb_nh". ("PFG Stones" is a trademark of Kinetic Precision)

Getting Balanced... Finally. I release the KP Model BS-8 Balancing Stand, so you can stop yelling. Packaging is not Trivial - How you ship something is surprisingly important. Duh! Process Reliability Beats Speed - I learn something about turning off a cool feature in my Bambu X1C Links for products/designs mentioned are at pfg.gg/links Follow me on Instagram at "spencer_webb_nh". ("PFG Stones" is a trademark of Kinetic Precision)

Does Anybody Really Know the RH? - A person with two watches never knows the time. We discuss the $3 hygrometer, and dealing with its inaccuracies. There's a possible product development in there. Downhole Deburring - some new tools for an old problem. The NOGA RC1000, RC2000, and RC2200. A Better Balancer Thanks to My Wife - She moved it off the table, and I saw something. This led to a design improvement for the new BS-8. And a discussion about what you do with customers of an existing product you just improved. [ERRATA: when I said "Nova Scotia", I meant "Newfoundland". Sorry.] Links for products/designs mentioned are at pfg.gg/links Follow me on Instagram at "spencer_webb_nh". ("PFG Stones" is a trademark of Kinetic Precision)

Achieving Balance: The Required Epiphany! What is the WLPC and how does it apply to Balancing Stands? You're going to like the answer. Polymer Hydrolysis: perhaps harder than we thought, but still important. Calibrated Hygrometers? My fellow engineer takes our three-dollar hygrometers for a spin down calibration lane. We are only slightly surprised. Links for products/designs mentioned are at pfg.gg/links Follow me on Instagram at "spencer_webb_nh". ("PFG Stones" is a trademark of Kinetic Precision)

Shipping: C'mon CANADA! Sheesh... Balancing Stand Update: I had the Required Epiphany! And it is good. Bambu PETG Basic: I get it, I try it, I have some things to say about it. Filament Drying Chemistry: It's not a sponge, there is some chemistry involved, and we need to grok it. All about HEAT: Conductivity vs. Capacity Links for products/designs mentioned are at pfg.gg/links Follow me on Instagram at "spencer_webb_nh". ("PFG Stones" is a trademark of Kinetic Precision)

A Tale of Two Lids: Should I change from PETG to PLA+ Minimize Inventory: Superb 3DP reliability means minimum inventory... with a good spreadsheet PVA: Release Stick, NOT Glue Stick RSI: Maximize Automation. Seriously, don't wear yourself out. NOTE: My laser is a "fiber laser" (short wavelength), NOT a CO2 laser (long wavelength) which would interact with the plastic MUCH more. Links for products/designs mentioned are at pfg.gg/links Follow me on Instagram at "spencer_webb_nh". ("PFG Stones" is a trademark of Kinetic Precision)

Two is One. One is None. - Redundancy is your friend Of Damping and Dampness - Most problems go away with dry filament and chicken soup. Desiccant? Yes We Can - An end-to-end system for repeatable, predictable 3DP results. NOTE: When I talk about using IPA (isopropyl alcohol), I am referring to 99% IPA. Not 91%, and certainly not 70% as may be found in the local shop. Links for products/designs mentioned are at pfg.gg/links Follow me on Instagram at "spencer_webb_nh". ("PFG Stones" is a trademark of Kinetic Precision)

I can't be in the office, so this is a mobile edition of PFG Live. Same incisive analysis. Fewer snacks. Bambu update. 5000 Mile Lightning Report. Damping the Grinding. And more... Follow me on Instagram at "spencer_webb_nh". ("PFG Stones" is a trademark of Kinetic Precision)

Special Guests: Robin Renzetti ( @ROBRENZ , IG: robinrenzetti), and Bill Schongar of MakeIt Labs, Nashua NH. Does the Bambu X1C Solve a Problem - well, it sorta does. But I have questions. Why I'm not selling my PRUSAs... yet. ProtoMax Water Jet... My makerspace got one, and I got my hands on it. But, we run out of time... a future episode will dive (!) into it. Follow me on Instagram at "spencer_webb_nh". ("PFG Stones" is a trademark of Kinetic Precision)

3DP Abhors a Vacuum: A PRUSA goes down for repair, and the territory is primed for change. Damping Followers: The Benelli Pin project raises some interesting questions. Why Verified?: Spencer goes Verified on Instagram - Why he did it, and why you might shouldn't. Follow me on Instagram at "spencer_webb_nh". ("PFG Stones" is a trademark of Kinetic Precision)

Special Guest: John Saunders of Saunders Machine Works and @nyccnc ! Are 3D Printers a Necessity Now?: We make the case. We go deeep on the Bambu printer, and John's recent experience with his. Does he make Spencer get out the checkbook? Failure is Noisy Progress: Changing the plan on the Benelli Pin Project. We need damping. Sowing the Seeds of ... Discord: The KP Discord server is up. Follow me on Instagram at "spencer_webb_nh". ("PFG Stones" is a trademark of Kinetic Precision)

Spencer Grinding Benelli pins: How am I going to hold it? Aaron Walla's new Parker Majestic grinder and Adam Demuth's vast experience... together! Generally starting trouble and watching it unfold. Follow me on Instagram at "spencer_webb_nh". ("PFG Stones" is a trademark of Kinetic Precision)

3D Printing for Machinists: It's another tool you need. Really. Balancing: Important for your car tires... REALLY important for your grinding wheels. Heat-Treat Experiment: When the data sheets are approximate. Follow me on Instagram at "spencer_webb_nh". ("PFG Stones" is a trademark of Kinetic Precision)

Unwanted Growth: Oxide, Martensite or Both? (Lathe operator runs and hides...) Holding Lasagna Noodles... for grinding. Contradictory Heat-Treating: The datasheets disagree with each other, and the research. Follow me on Instagram at "spencer_webb_nh". ("PFG Stones" is a trademark of Kinetic Precision)

Boring Tools Aren't. My pins are too strong? Plane, Line, Point. PRUSA Mk4 or Bambu? The audio portion of this video is published as a podcast! Search for "PFG Live" on your favorite podcatcher. Follow me on Instagram at "spencer_webb_nh". ("PFG Stones" is a trademark of Kinetic Precision)

In which we discuss using coolant on grinders. Spencer reviews three generations of grinders and what coolant solutions were used on each. We report a new country for PFG Stones exports, and a new company in the US. We followup on the toolpost improvements, including a calculation of how much power is delivered into the cut using the cutoff tool on titanium as show in a recent video. We discuss the next step in the Entirely Adequate toolpost modifications. The Bambu 3D printer has arrived on the market with some fanfare, and we discuss the reports we are hearing about it. We learn from Kevin that a new PRUSA has also been announced.

The audio portion of the PFG Live! from YouTube. The weekly exploration of machining, toolmaking and engineering. Brought to you by Kinetic Precision, makers of PFG Stones (tm). Learn more at PFGStones.com. Watch Wood Creek Workshop for Yuchol's PFG Stone shoutout: @woodscreekworkshop9939 Follow me on Instagram at "spencer_webb_nh". ("PFG Stones" is a trademark of Kinetic Precision)

Watch Wood Creek Workshop for Yuchol's PFG Stone shoutout:  @woodscreekworkshop9939  Follow me on Instagram at "spencer_webb_nh". ("PFG Stones" is a trademark of Kinetic Precision)

Cylinders are Square? Measure the Right Thing. Expensive Tolerance.

Lapping Under Control? Feedback vs. Feedbag. Better Resin Printing on Form 3+. 1000 Electric Miles! All this and more... NOZ information at: https://www.kineticprecision.com/noz or NOZ.GG PFG Stone information at: https://www.kineticprecision.com/all-about-pfg-stones1 or PFG.GG All my links at: https://www.kineticprecision.com/links or PFG.GG/links I love my Kaeser compressor: https://us.kaeser.com/ #notsponsored Thanks again to Tom Lipton @oxtoolco , Robin Renzetti @ROBRENZ , and Adam Balogh @machinetechvideoblog801 for being such good teachers. Follow me on Instagram at "spencer_webb_nh". ("PFG Stones" is a trademark of Kinetic Precision)

Machining, toolmaking, precision. Can you afford not to watch this? Yah, we didn't think so. We went long, very long, but it was worth it. Many thanks to Tom and Robin for sharing their wisdom and good humor. Here are the links to the interviews on Within Tolerance Podcast: Episode 71 - Robin Renzetti: https://podcasts.apple.com/us/podcast/within-tolerance-episode-71-robin-renzetti/id1474857063?i=1000497233902 Episode 35 - Tom Lipton: https://podcasts.apple.com/us/podcast/within-tolerance-episode-35-tom-lipton/id1474857063?i=1000466789305 Episode 97 - Spencer Webb: https://podcasts.apple.com/us/podcast/within-tolerance-episode-97-spencer-webb/id1474857063?i=1000525186451 ("PFG Stones" is a trademark of Kinetic Precision)

Am I really heat-treating at 65 MPH? Can a shop be too organized? How to counteract the attractive force of a surface plate? These answers and more... Mentions: @KnifeSteelNerds - A great education on tool steels and treatments @AdamBrunette - Thanks, buddy! Adam is building a HUGE 3D printer! @JohnGrimsmo - The knife man, knife myth, knife legend. @oxtoolco - Author, Teacher, Man of Mystery. @ROBRENZ - Toolmaker, teacher, Doctor of Precisionology. https://www.mcmaster.com/ - The Good Yellow Book https://www.ford.com/trucks/f150/f150-lightning/ - The Ford Lightning @ford https://www.americanrotary.com/product-category/hot-shot-ovens/ - Hot Shot Ovens @Americanrotary Links for the bakers' racks and everything else I buy are in my links page: pfg.gg/links (or https://www.kineticprecision.com/links) ("PFG Stones" is a trademark of Kinetic Precision)

In which we talk about Spencer's new Ford F-150 Lightning EV. We discuss some details of Lapping Disease, and lament the lack of progress this past week. And we announce.... On February 19th we will have TWO simultaneous guests on the PFG Live, none other than Tom Lipton (@oxtoolco) and Robin Renzetti (@robrenz). Spencer's job is to start trouble. See ya there. For all the links to stuff I use: https://PFG.GG/links The Monochromatic Rabbit Hole: https://kineticprecision.com/monochromatic McMaster-Carr: https://www.mcmaster.com/ ("PFG Stones" is a trademark of Kinetic Precision)

In which Spencer takes the plunge and starts lapping, enjoys some initial success followed by frustration. And then followed by an epiphany, which led to Flatosity. And then screws it up. Excellent input from the Chat Room, much to learn there. How do you start controlling flattness at the tens-of-nanometers scale? Join us on the journey. ...and don't call me Shirley. ("PFG Stones" is a trademark of Kinetic Precision)

In which Tom Lipton catches us up on his shop developments, which include, but are not limited to: Lapping EDM (electronic dance music, or if you prefer, Electrical Discharge Machining) Carne Asada with marinated skirt steak. The Abernathy patent for lapping plates: https://patents.google.com/patent/US3287862A/en ("PFG Stones" is a trademark of Kinetic Precision)

Guest Adam Balogh joins us to discuss lapping and his exploits in telescope mirror making. We draw parallels (!) between lapping mirrors and lapping in precision machining. Much is learned. Things mentioned: Adam's Instagram: https://www.instagram.com/laneymachinetech/ ABLAP: https://ablap.com/ Cerium Oxide: https://en.wikipedia.org/wiki/Cerium(IV)_oxide Surplus Shed: https://www.surplusshed.com/ Zerodur: https://en.wikipedia.org/wiki/Zerodur Caswell Plating: https://caswellplating.com/ Telescope mirror blanks: http://www.telescopemirrorblanks.com/mirror_blanks.html Newport Glass: http://www.newportglass.com/angwcat.htm Advanced Glass: https://www.advancedglass.net/index.cfm?Page=Telescope-Mirror-Blanks The guy who did all the mirrors for John Dobson and the sidewalk astronomers: http://www.alcoat.net/ Majestic Coatings: http://www.majestic-coatings.com/ Spectrum Coatings: https://www.spectrum-coatings.com/ Observatories with telescope making workshops: https://chabotspace.org https://stellafane.org/ Source for the spray-on silvering solution for front surface mirrors: https://angelgilding.com/pump-spray-silver-kit.html Links to more stuff is at https://pfg.gg/links ("PFG Stones" is a trademark of Kinetic Precision)

Aaron Walla joins Spencer to discuss some new topics and follow-up on his search for a grinder in his home shop We talk coolant, thermal control of coolant, tools and toys. Follow Aaron on Instagram at "@walla.tool" Follow me on Instagram: "@spencer_webb_NH" 200-Watt magnet heater: https://amzn.to/3Xx4e38 800-Watt submerged heater: https://amzn.to/3QCku0y Temperature controller: https://amzn.to/3IJDxEv Lutron Caseta remote controlled outlet: https://amzn.to/3H50l0j Qualichem 250C data sheet: http://backend.qualichem.com/product_docs/df183_Xtreme%20Cut%20250C%20(1.12.15).pds.pdf ("PFG Stones" is a trademark of Kinetic Precision)

With guest Aaron Walla of Walla Tool (@walla.tool on IG), in which we discuss choosing and purchasing a surface grinder to fit the requirements of the shop. And offer Aaron Walla unwanted advice to "help" him with his decision. And the usual stuff. (Apologies for the technical quality of this live production. I was troubleshooting issues right up to launch time, and decided to proceed with lower video quality rather than delay. I vow to solve these issues for the next one. -SW) Follow me on Instagram: "@spencer_webb_NH" ("PFG Stones" is a trademark of Kinetic Precision)

In which we report on the effectiveness of heating the coolant to make up for winter. Thermal growth in the grinding is calculated. The supply chain is repaired. The Hive-Mind helps design battleaxes for me, per the request of conjette.art. Really. Follow me on Instagram: "@spencer_webb_NH" 800-Watt submerged heater: https://amzn.to/3QCku0y Temperature controller: https://amzn.to/3IJDxEv ("PFG Stones" is a trademark of Kinetic Precision)

The YT switchover. Mom's 167 boxes. Making a coolant cozy. The surprising thermal mass of 30 gallons of coolant. Bubbler Stone: https://www.amazon.com/gp/product/B08B3MX4BP/ Oil Pan Heater: https://www.amazon.com/gp/product/B0076DUV2Q/ Heater Controller: https://www.amazon.com/gp/product/B01486LZ50/ Follow me on Instagram: "@spencer_webb_NH" ("PFG Stones" is a trademark of Kinetic Precision)

Special Guest: Stefan Gotteswinter (@stefan_gtwr on IG, Stefan Gotteswinter on YT). Precision Cordless Drill Balancing. Side-saddle Grinding. What a pair of stones! Learning to be, and not to be precise. Legal beer. 0:00 Welcome and housekeeping 4:00 Stefan Gotteswinter joins 5:25 Has Stefan been following Spencer's interest in lapping? 5:50 Stefan's recent video about drilling on the lathe using the carriage instead of the tailstock. 8:00 Giving away a McMaster-Carr catalog 11:05 Any tips on making Annular Cutters 12:30 Favorite or preferred brand of lapping compound? 15:30 Follow up on annular cutter, to use on a lathe 17:00 Silver Steel is a term used in the UK for Drill Rod; it's Silberstahl in German 17:55 What German Ginger Beer does Stefan recommend? 18:55 If Ginger Beer is illegal in Germany, how do you Justify Radler? 20:30 What is the smallest part Stefan has made in his shop? 21:18 How difficult is it for Stefan to get parts Nitrided 22:13 If you had Elon Musk's money, which Mill or Lathe do you buy? 23:50 What is your favorite way to "Clock Out" a headstock? 26:55 For M1.2 Tapped hole what type of Tap do you recommend? 28:15 Adam B says he has a way to align a Headstock with the Cross Slide using a Special Tool that has a Gauge Ball on it. Details to Follow. 29:10 How to prevent M3 Taps breaking in stainless steel on a CNC lathe? 34:20 Marvin Groeb @marvgro recommends Zirconia nanoparticles as a lubricant 30:45 How to improve the rigidity between the head and vertical column of an RF-45 32:20 Do you use IPA (isopropyl alcohol) on steel in the CNC router? How do you prevent it catching fire? 35:05 Stefan is asked for his opinion on Adam Demuth's (@adamthemachinist) 3D printed Vee blocks 36:55 Stefan is asked for drawings of his addendum to Robin Renzetti's D-Bit Grinder modifications 38:05 Adam B (@Laneymachinetech) ask for Stefan's comments on Cylindrical Grinding and Lapping to optimize geometry and surface finish. 42:05 Spencer asks Stefan about his new Grinder 51:30 What do people need to learn to do more precise work. 53:50 Stefan is asked to regrind precision ground stones that he mad for a customer. 57:45 When grinding a radius on the D-Bit, how do you indicate the offset of the work? 59:10 What is the spindle speed of the D-Bit? 59:50 What projects does Stefan most enjoy? 1:01:30 What is missing from Stefan's tool collection?

Flat is where it’s at. Adam B. From Laney Machine Tech joins us, and we nerd out. Optical flats, monochromatic light sources, and how to get set up to make measurements for peanuts.

Forget three plates. Top is concave, bottom is convex. Tumbled? Charged?

PFG Stone Bevel progress update, melting of the snow, awesome solar electric days. NOZ update. Special guest @marvgro from Kern!!

Solar panel opinions. Balancing news, brief bevel update (excuses). Great Guest: Adam Demuth. T-shirt updates with Conjette. Art meets Grinding.