Info

Business of Machining

John Grimsmo of Grimsmo Knives and John Saunders of NYC CNC discuss their success, struggles, goals and more as machinists, business owners and entrepreneurs.
RSS Feed
Business of Machining
2020
September
August
July
June
May
April
March
February
January


2019
December
November
October
September
August
July
June
May
April
March
February
January


2018
December
November
October
September
August
July
June
May
April
March
February
January


2017
December
November
October
September
August
July
June
May
April
March
February


All Episodes
Archives
Now displaying: March, 2020
Mar 27, 2020

This weeks episode is a little different than our normal conversations. John & John talk all about the effects of COVID-19 in their personal life and business life. They take a quick detour to talk about higbee threads as well! Please everyone stay safe out there. Look after yourself and loved ones.

Mar 20, 2020

TOPICS:

  • Thoughts on Covid-19 and small business
  • The SAGA 
  • Solutions for breaking tools during internal threading
  • Why You Need a Neon Vest In Your Shop

BREATHE. Yes, they talk about Coronavirus. Yes, they are washing their hands. What you won't find are hosts hoarding toilet paper or coming up with conspiracy theories. What you will find is hope and perseverance!

If you want to know how you can help fight Covid-19, please visit https://www.nyccnc.com/covid/

EDC > Safe Queen
During a hiking/shooting trip with a friend, Saunders notices a spectacularly crafted GK SAGA pen sticking out of his friend's shirt pocket. After spending some time outdoors, Saunders realizes he's lost his OWN SAGA...let's just say this pen has a SAGA of its own.

Grimsmo shares how the clips are uniquely and perfectly tensioned.

Internal Threading Problems
Sub-spindle threading cycle = Butt Clench 100
Find out why Saunders uses masking tape on the lathe.
Grimsmo switches to making knife thumb studs on the Tornos instead of the Nak. A very tiny threaded hole causes 5-6 tools worth of headache. He searches for the problem, only to kick himself later.

Grimsmo explains GO, NO-GO
Listen to the one and only Go, No-Go explanation that actually makes sense!

SMW Fixture Plate Tops
Now that all Pierson Workholding Mini Pallets are compatible with SMW Fixture plates, Saunders turns his attention to diamond dowel pins that require tight tolerances. When it comes to QC, keep it simple!

IN THE STUDIO
Fraser has fashioned a sweet sound-proof audio/visual room for GK videos and products!

NEON VESTS
What is it good for? Absolutely nothing---if it's not in use.

Mar 13, 2020

Have you ever wanted to listen to two grown men talk about a lathe like children in a candy store? Well this episode is for you. John Saunders goes in depth trying to make his first sub spindle lathe part. The boys also talk all about the mist collector situation at the Grimsmo shop and to not overlook the air quality. John Grimsmo also made a "production run" of 9 parts on the Kern!

Mar 6, 2020

TOPICS:

  • 5-Axis Machining Generatively Designed Parts
  • Tool life troubleshooting & solutions
  • Steep & Shallow in Fusion 360
  • McMaster Coolant Filtration Solutions
  • Relieved Shank Endmills
  • Shrink Fit, Set Screw, & Pull-Stud Extenders

 

SMW & MACHINING A GENERATIVE DESIGN PART

(Click Image to View Post)

In January, NYC CNC made trucks for a Datron longboard with a combination of 3-axis and 5-axis machining.  However, they didn't stop there!

Gavin Bath from CADPRO Systems in New Zealand took the brunt of the work for modeling a generatively designed truck and now it's Saunders' turn to machine it!
Today, he'll hit cycle start on his first true simultaneous steep and shallow toolpath. He also shares an important lesson about work coordinate systems.

No Rush on the Naks
Grimsmo and his team settle into their new shop. Although the machines are up, the Naks still aren't making parts because of coolant line reconfiguration. Will they be forced to scramble or was it all part of the plan?

TORX KILLING TOOLS ON TORNOS
The 17-4 stainless pivot screws are proving to be a challenge on the Swiss. Grimsmo's using the same process he's used for 5-6 years but the endmills are dying out after 35-60 parts! Saunders and Grimsmo troubleshoot various factors that affect tool life and possible solutions.


THE MENTAL TRAP - IS THIS YOU?
When it comes to machining strategies, if you've ever found yourself saying, " But I want it to work like THIS," STOP RIGHT THERE! Saunders says, "Get the recipe working FIRST--even if you don't love it. THEN start tweaking it from there!"

REACH!
When it comes to 5-Axis milling ensuring that you're able to reach occluded features is key. Grimsmo and Saunders discuss relieved shank tools, tapered endmills, and shrink fit, set screw, and pull-stud extenders.

Grimsmo + KERN = NEW Pocket Clip Supports
Today, he's going to machine this part in 1 op but he's not quite sure which strategy to use for the curvy areas of the part. Saunders suggests either 3D Contour with shaft and holder detection OR Steep and Shallow.


SAUNDERS CALLS OUT ChipBLASTER
When reaching out for coolant filtration solutions, he got nothing but poor customer service and people reluctant to give straight answers. With that, he sets out to find other options.

Grimsmo stands by his filter bag housing from McMaster.
Click Here to See Part Number 5168K249


Adafruit Parallel
While watching an interview with the CEO of Adafruit, one particular line strikes a chord with Saunders. It brings a new sense of clarity in terms of defining what SMW does.

1