Best Machining Podcasts (2025)

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Within Tolerance Episode 261 - In-Person and On Video with Zap 1:35:08

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3d ago1:35:08

1:35:08

Zap joins me in the studio for our first-ever video recording! We share updates from both our shops, with Zap detailing his extensive travels and successful business model revamp. I discuss recent shop improvements, material supplier frustrations, and a surprising visit from wastewater management. We answer listener questions about optimal shop lay…

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#420 Johnny Five electrical schematic 45:36

7d ago45:36

45:36

TOPICS: Air compressor and coolant problems Johnny Five electrical schematic M2 steel testing Hard threading Prototyping 5 axis partsBy johngrimsmo

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Within Tolerance Episode 260 - Denis Basaric of KafaTek 1:57:01

10d ago1:57:01

1:57:01

Denis Basaric of KafaTek shares his fascinating transition from software engineer to manufacturer of premium espresso grinders. We discuss his pursuit of perfection - from designing coffee burrs with 5-micron adjustability to implementing robotic automation and sophisticated QC processes. Denis also explains the technical differences between burr d…

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#419 Reinvest or take out money? 47:24

14d ago47:24

47:24

TOPICS: UPS knives to Blade Show still stuck in Atlanta 465 Custom stainless steel Firechrome material Reinvest or take out money? Was there a point where you wanted to throw in the towel?By johngrimsmo

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Within Tolerance Episode 259 - John Saunders of NYC CNC and Saunders Machine Works 2:02:34

18d ago2:02:34

2:02:34

From Finance to Fixture plates - John Saunders reveals the winding path that led to creating NYC CNC and Saunders Machine Works. We discuss his transition from investment banking to manufacturing, building an audience through YouTube, and the hard-won lessons of business partnerships. John shares candid perspectives on his major equipment investmen…

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Within Tolerance Episode 258 - Just Send It with David Liu of Brittle Fluid 2:00:02

26d ago2:00:02

2:00:02

In this episode, I sit down with David Liu, founder of Brittle Fluid, to discuss his fascinating journey from mechanical engineering student to software entrepreneur. David shares his evolution from Harbor Freight mini-mill hobbyist to professional machine shop owner, and his experiences at Neuralink and Atomic Machines. We explore his current vent…

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#418 Crazy adventures at Blade Show 2025 46:59

28d ago46:59

46:59

TOPICS: Crazy adventures at Blade Show 2025 Saunders crashed the Okuma Moduleworks visited SMWBy johngrimsmo

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#417 Normal days vs rework days 49:41

1M ago49:41

49:41

TOPICS: Kern runs great now! Normal days vs rework days High, Low, Buffalo Blade Show 2025 465 custom material Helicoil storiesBy johngrimsmo

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Within Tolerance Episode 257 - Breeding MAMs with Justin and Zap 2:12:40

1M ago2:12:40

2:12:40

This week, Justin Gray shares exciting updates about Toolpath Labs' new tool recommendation engine and their partnership with Kennametal, while Zap details his frustrating shop power saga and van towing misadventures. We explore the concept of "technical debt" in both software and machine shops, discuss whether location matters when starting a mach…

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#416 Johnny Five AI audio 49:39

1M ago49:39

49:39

TOPICS: Coolant maintenance Kern is fixed! We realigned B axis ourselves Johnny Five AI audio Setup sheets Automating bevel grindingBy johngrimsmo

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Within Tolerance Episode 256 - Rebecca Wolfinger of Mil-Spec Manufacturing 1:12:31

2M ago1:12:31

1:12:31

From culinary chef to machine shop owner, Rebecca Wolfinger joins me to share her remarkable manufacturing journey. As co-owner of Mil-Spec Manufacturing, Rebecca discusses building a veteran-owned manufacturing business from the ground up, acquiring their first Haas VF4 for just $10,000, and their recent expansion with a Tormach 1500MX robot cell.…

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#415 Kern crashed 50:58

2M ago50:58

50:58

TOPICS: Kern crashed VM3 coolant actually went bad Surface grinding with Robin RenzettiBy johngrimsmo

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#414 Surface grinding on the Tormach PSG 46:39

2M ago46:39

46:39

TOPICS: Toolpath team visited SMW Mechanical pencil deep dive Measuring grinding wheels Wogaurd coolant sucker upper https://www.wogaard.com/coolant_saver.html Surface grinding on the Tormach PSG Topper machine auction video WATCH THIS: https://www.youtube.com/watch?v=CcPDZB11A9w 3d printing big parts…

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Within Tolerance Episode 255 - Baby Proteum with Zap 2:11:56

2M ago2:11:56

2:11:56

In this episode, I catch up with Zap after my paternity leave to discuss our recent experiences. Zap shares updates on his whirlwind travels across the country, shop move complications, dental health revelations, and his work on a high-precision linear motor machine. I talk about my new journey into fatherhood, the emotional rollercoaster of the ne…

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#413 Smelly coolant 45:42

2M ago45:42

45:42

TOPICS: Speedio looping the program over and over Saunders programmed a part in Toolpath Waterjet profile is wrong Johnny Five is under control! Smelly coolantBy johngrimsmo

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#412 Renzetti 1-2-3 blocks 49:20

2M ago49:20

49:20

TOPICS: Toronto knife show Grindmilling Toolpath mistake Arda and ERP systems Renzetti 1-2-3 blocks Johnny 5 turned on for the first time!By johngrimsmo

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Within Tolerance Episode 254 - Zap and Justin Gray 2:15:33

3M ago2:15:33

2:15:33

In this episode, I catch up with Zap and Justin Gray to discuss recent developments in our respective worlds. We dive into tool libraries, machine shop organization, and the challenges of running growing businesses. Justin shares insights from Toolpath Labs' recent company gathering and their progress with AI-driven CAM automation. Zap updates us o…

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#411 Cycle time evaluations 52:36

3M ago52:36

52:36

TOPICS: Superglue fixtures Toolpath.com Passion for machines and projects Cycle time evaluations GrindmillingBy johngrimsmo

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#410 Prussian Blue is amazing 47:20

3M ago47:20

47:20

TOPICS: Prussian blue is amazing. Bambu H2D 3d printer Calibrating a 5 axis machine Hand scraping deep dive Tormach 1500 MXBy johngrimsmo

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#409 Hardmill all the things 47:30

3M ago47:30

47:30

TOPICS: Mentality around tariffs Button lock geometry Buy prussian blue Hardmill all the thingsBy johngrimsmo

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#408 Dedication to our Willemin 408MTs 48:15

3M ago48:15

48:15

TOPICS: Robots Demagnetizing 4140 bars Rolex Johnny 5 track drives Probing for accuracyBy johngrimsmo

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Within Tolerance Episode 253 - Employees are Tough with Easton Bednarek 1:46:07

3M ago1:46:07

1:46:07

Easton from Moria Manufacturing returns to share updates and challenges since his last visit. We discuss the rapid expansion, new machines like the SC 300, struggles with employee training, and the unexpected costs of scaling up. Easton provides an in-depth look at how they've optimized their turning operations and shares the invaluable lessons lea…

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#407 First Hundred knives and lessons learned 44:14

3M ago44:14

44:14

TOPICS: Fusion PSA on heights tab Measuring ultra precision Heat treating improvements Tormach 1500mx updatesBy johngrimsmo

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Within Tolerance Episode 252 - ABC: Always Be Changing with Zap 1:21:35

4M ago1:21:35

1:21:35

This week, Zap updates us on several challenges - his search for a new shop space, ongoing van saga, and dealing with a particularly frustrating customer situation. Meanwhile, I discuss my recent HyperMill software purchase and share thoughts on tool organization in Fusion 360. We also dive into standardizing workflows for small shops and the impor…

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Within Tolerance Episode 251 - Phil Linscheid 1:51:08

4M ago1:51:08

1:51:08

In this episode, I speak with Phil Linscheid, Director of Manufacturing at Hamilton Company, about his journey through the manufacturing industry. Starting as a young manager at Haas Automation to now overseeing a large medical device manufacturing operation, Phil shares insights on managing people, implementing automation, and balancing technical …

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#406 Surface grinding deep dive 49:18

4M ago49:18

49:18

TOPICS: Business insurance Thermal compensation on Speedio Surface grinding deep dive Shop improvementsBy johngrimsmo

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Within Tolerance Episode 250 - Prepping for the Future with Zap 1:28:56

4M ago1:28:56

1:28:56

Zap joins me this week to discuss recent travels, re-establishing stability, and the importance of relationships in business. We share updates on new projects, machine purchases, and the integration of automation in machining. Plus, we delve into personal health routines and navigating the complexities of business investments and accounts receivabl…

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#405 Why are lathe parts not round? 47:09

4M ago47:09

47:09

TOPICS: Gorilla Stand indicator holder! Why are lathe parts not round? Thermal growth on the Speedio Okuma fake CMM Heat treating 440c and carbide clumping Dishwashing parts at homeBy johngrimsmo

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#404 Life as a small business owner 49:31

4M ago49:31

49:31

TOPICS: Making ultra flat precision washers Fjell knives are starting to selling Custom ultra precision indicator stands Tarrifs Post heat treat hard turning Hardmilling successBy johngrimsmo

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Within Tolerance Episode 249 - Pete Oxenham of Chatter and Toolpath 1:07:50

5M ago1:07:50

1:07:50

I'm happy to welcome back Pete Oxenham, founder of Chatter and Head of Product for Toolpath, for an in-depth discussion on his recent journey. We delve into Pete's decision to sell his machine shop to focus entirely on Chatter, the challenges he faced in finding a suitable buyer, and the emotional roller coaster of letting go of a business he built…

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#403 Make decisions and dealing with the consequences. 51:44

5M ago51:44

51:44

TOPICS: Make decisions on your own, as long as you're willing to deal with the consequences. CHATTER machine monitoring Robots! Mastering youtube Dial test indicator stand Surface grinding and lapping Tormach 1500mxBy johngrimsmo

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#402 "Delegating is sometimes just as simple as delegating" 51:09

5M ago51:09

51:09

TOPICS: "My Willy is doing great" - Grimsmo Kern was purchased by Ametek. "Delegating is sometimes just as simple as delegating". Auto serial numbers on Okuma Vapor degreaser Diamond lapping Bad 3d printingBy johngrimsmo

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Within Tolerance Episode 248 - Burning Money with Zap 1:53:27

5M ago1:53:27

1:53:27

Zap joins me this week to discuss recent travels, acquiring Esprit software, and moving the shop. We share stories about challenging customer interactions, machine crashes, and optimizing workflows with ChatGPT. We also explore work-life balance, 3D surfacing in Fusion, and mill-turn machine preferences. Check out Zap's IG @zap.consulting ---------…

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#401 Stress in your business 51:18

5M ago51:18

51:18

TOPICS: Heat treated A2 dimensions Grimsmo Fjell update Robot loading solutions Endmill consistencyBy johngrimsmo

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Within Tolerance Episode 247 - Joseph Pizzoferrato of Heidenhain 1:36:10

5M ago1:36:10

1:36:10

This week, I talk with Joseph Pizzoferrato from Heidenhain about his journey in machining, from Durabar to Heidenhain. We cover his experiences with Mazak training, Mastercam, and delve into Heidenhain controls. Joe shares insights on tool radius errors, macro programming, and new TNC 7 features. He also discusses the importance of collision protec…

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Within Tolerance Episode 246 - Crashtastic with Zap 2:38:19

5M ago2:38:19

2:38:19

Zap joins me this week to kick off the first in-person episode of 2025. We dive into Zap's recent travels and adventures, including a trip to another country, getting a head tattoo, and dealing with various machining and business challenges. We discuss the nuances of tool libraries, the importance of five-axis machining, and the comparative merits …

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#400 Episode 400 baby!! 48:14

5M ago48:14

48:14

Intern or full time machinist? DOITS 100 Fjell knives Hardmilling and tool life Chatter machine monitoring installed at SMWBy johngrimsmo

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#399 Too much on my plate 49:20

6M ago49:20

49:20

TOPICS: Project management at Saunders Tolerance ranges and scrapping parts Python script deep dive Robots to change workpieces and pallets Willemin part release... magnetism? Too much on my plateBy johngrimsmo

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Within Tolerance Episode 245 - NS Precision Inc 1:48:44

6M ago1:48:44

1:48:44

Nick and Skylar Squillace of NS Precision Inc join me this week to discuss their journey from hobbyists to successful shop owners. We talk about their transition into motorsports, overcoming the challenges of running a small machining company, and the crucial steps they've taken to streamline operations. Learn about their experiences with the Haebe…

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#398 Python script to create the perfect toolpath! 53:41

6M ago53:41

53:41

TOPICS: NYCCNC has been purchased by DSI Hardmilling Kolsterizing process by Bodycote 5 axis automation and robotics DOITS finally work - Shrink the project - Cannot think about it Grimsmo grinding improvements - Python script to create the perfect toolpath!By johngrimsmo

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Within Tolerance Episode 244 - Simon and Zap-funkel 1:26:38

6M ago1:26:38

1:26:38

This week I'm joined by Zap and Simon from Freddy who are both together in the UK. Chris shares details of his whirlwind trip, including a new head tattoo and training Amish machinists on advanced machinery. Simon updates us on exciting solar panel projects and the latest custom Freddy machines, from minion-themed to high-tech Rolls-Royce designs. …

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#397 Team oriented wishlish 50:20

6M ago50:20

50:20

TOPICS: 2025 changes DOITS Leadership roles Measuring runout in toolholders 5 axis automation at Saunders? Team oriented wishlish Fjell production updateBy johngrimsmo

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Within Tolerance Episode 243 - Jim Belosic of SendCutSend 1:35:55

7M ago1:35:55

1:35:55

This week I chat with Jim Belosic, CEO and founder of SendCutSend. We dive into Jim's background, from his artistic beginnings creating custom pancakes for his daughter to running a software company, Pancake Laboratories. Jim shares how his passion for cars and fabrication led to the birth of SendCutSend, an on-demand sheet metal manufacturing serv…

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#396 Raspberry Pi in the shop 47:00

7M ago47:00

47:00

TOPICS: Oscilliscope readings on Heidenhain Tool life in A2 steel Raspberry Pi in the shop Tour of Henry Holsters Project management in 2025By johngrimsmo

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Within Tolerance Episode 242 - Eric Larson of Clear Irons 3:14:49

7M ago3:14:49

3:14:49

In this episode, I'm joined by Eric Larson from Clear Irons. We dive deep into his journey as a machinist and industrial designer based in Chicago. Eric delves into the origins of Clear Irons, his educational background in industrial design and metalsmithing, and the evolution of his business. We discuss the challenges and triumphs of managing a li…

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#395 Tracking tool life 51:04

7M ago51:04

51:04

TOPICS: Willemin air lines all replaced Saunders is using metric hardware Microscopes in the shop Tracking tool life Machining A2 The ultimate Clamps Lapping precision holesBy johngrimsmo

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Within Tolerance Episode 241 - I Am Thankful with Zap 1:56:56

7M ago1:56:56

1:56:56

Join Zap and I as we catch up on the eve of Thanksgiving! We dive into recent shop updates, the ongoing van saga, and share our favorite Thanksgiving traditions. Listen in as we detail technical challenges, highlight valuable machining tips, and discuss lessons learned from various projects. We also chat about our year-end reflections, what we're t…

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#394 DIY 3d printed machine tools with concrete! 53:05

7M ago53:05

53:05

TOPICS: DIY 3d printed machine tools with concrete! Flextures and insane tolerances Machining soft blades in the Kern is slow, but better Patterning stress Hardmlling tool life? Chatter machine monitoringBy johngrimsmo

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#393 Fusion tips and tricks 53:40

7M ago53:40

53:40

TOPICS: Google Appscripts does awesome stuff Notes to yourself in Fusion 360 and other Fusion tips and tricks Hardmilling update! Hard grindmilling too. Heat treating ideasBy johngrimsmo

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#392 Hardmilling puckchucks on Okuma 51:21

8M ago51:21

51:21

TOPICS: Hardmilling puckchucks on Okuma Heat treating ovens Fjell pocket clip success! Prusa new printersBy johngrimsmo