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Browsing articles in "Techniques"

Learn How to Tolerance Total Runout in GD&T

Dec 12, 2016   //   by Bob Warfield   //   Beginner, Blog, Manufacturing, Techniques  //  No Comments
total runout symbol callout GD&T

I just uploaded another installment to our Free GD&T Tutorial, and this article explains the Total Runout symbol.

Total Runout tolerance on a drawing…
Because Total Runout is such a tight control over every point on the surface, it is less commonly used than Circular Runout. Even so, it is still a fairly common GD&T…

14 Great Ideas for 4th Axis Fixtures to Save Time

Dec 7, 2016   //   by Bob Warfield   //   Blog, CNC Projects, Manufacturing, Techniques  //  1 Comment
Fourth Axis Fixture

Our recent article that showed the math behind using 4th axis to increase your work area was very popular, so I thought I’d follow up with a bunch of pictures of fourth axis fixtures.  Hopefully these will give you some ideas you can use!

A quick way to access a lot of small parts with…

Learn How to Tolerance Cross Sections of Complex 3D Surfaces in GD&T

Dec 5, 2016   //   by Bob Warfield   //   Beginner, Blog, Manufacturing, Techniques  //  No Comments
Profile of a Line GD&T callout Geometric Dimensioning Tolerancing

I just uploaded another installment to our Free GD&T Tutorial.

Profile of a Line callout on a drawing…
Geometric Dimensioning and Tolerances is a methodical and scientific way to specify tolerances on your drawings.  It tells in a concise symbolic way how much your parts can deviate from the geometric ideal.  If you do much…

How Do Tombstones Increase Your Work Area on a VMC With 4th Axis?

Dec 2, 2016   //   by Bob Warfield   //   Blog, Manufacturing, Products, Techniques  //  2 Comments
tombstone 4th axis vmc tormach

A tombstone with fixtures on all four sides set up on a Tormach CNC Mill…
I was reading an article about Tombstones in the Tormach blog recently and it got me to thinking about how Tombstones on VMC’s can make a job more profitable.
Tombstones are par for the course on Horizontal Machine Centers, but…

5 Ideas for Schools With Limited CNC Resources to Maximize CNC Training

Nov 30, 2016   //   by Bob Warfield   //   Blog, CNC Projects, Software, Techniques  //  No Comments
Cheap CNC Machine

At CNCCookbook, we have a LOT of educational customers, and we give them a nice educational discount on our software.
I got a note from a school wanting to know how they can maximize their CNC Training the other day.  The problem is that they have 1 CNC Mill and 1 CNC Lathe (plus 6…

How Many Days Since You Broke a Haimer Tip? (1 Day for Me!)

Nov 27, 2016   //   by Bob Warfield   //   Blog, Cool, Products, Techniques  //  2 Comments

So there I was, standing at the VMC, showing my son and his friends (home from college for Thanksgiving break) how the thing worked.  We were going to finish an 80% lower as a nice easy project that would be fun and interesting for them.  They were eager to check it out.  First job was…

Learn How to Tolerance Complex 3D Surfaces in GD&T

Nov 25, 2016   //   by Bob Warfield   //   Beginner, Blog, Manufacturing, Techniques  //  No Comments
gd&t profile of a surface symbol

I just uploaded another installment to our Free GD&T Tutorial.

Profile of a Surface callout on a drawing…
Geometric Dimensioning and Tolerances is a methodical and scientific way to specify tolerances on your drawings.  It tells in a concise symbolic way how much your parts can deviate from the geometric ideal.  If you do much…

CNCCookbook 2016 End Mills: Who Makes the Best End Mills?

Nov 23, 2016   //   by Bob Warfield   //   Blog, FeedsSpeeds, Products, Techniques  //  No Comments

What are the most popular end mill brands?  Let’s find out by surveying our readers (click the link):
Take the CNCCookbook 2016 End Mill Survey
We’ll put up the results as soon as we get a decent number of responses.  Be sure  you’re signed up for our email newsletter so you don’t miss hearing the…

Learn What the Angularity Symbol Means in GD&T Plus New Calculator

Nov 15, 2016   //   by Bob Warfield   //   Beginner, Blog, Manufacturing, Techniques  //  No Comments
angularity GD&T symbol

I just uploaded another installment to our Free GD&T Tutorial.

Angularity callout on a drawing…
Geometric Dimensioning and Tolerances is a methodical and scientific way to specify tolerances on your drawings.  It tells in a concise symbolic way how much your parts can deviate from the geometric ideal.  If you do much CNC work, you’re…

How the Pros Finish AR-15 Lower Receivers for Profit

Nov 14, 2016   //   by Bob Warfield   //   Blog, CNC Projects, Cool, Manufacturing, Techniques  //  5 Comments
AR-15 Lower Receiver CAD Fusion360

AR-15 Lower Receiver in Fusion360…
We have a lot of readers who are interested in firearms, and I’m a shooter myself, so I thought I’d pass along this fascinating video about how a pro shop goes from a forged 80% lower to a finished AR-15 Lower Receiver:

This video was done by Palmetto State Defense,…

2 Tools for Optimizing CNC Milling Cut Depth and Cut Width/Stepover

Nov 8, 2016   //   by Bob Warfield   //   Beginner, Blog, Cool, FeedsSpeeds, Manufacturing, Products, Software, Techniques  //  3 Comments

The depth of cut and width of cut (also called stepover) are crucial variables when milling pockets, profiling, facing, and any other machining operation where you’ll be cutting with the flutes on the side of an endmill.  Aside from the machine’s capabilities, the material, and a description of the tool to be used, they’re the…

Amazingly Simple Automatic Part Engraver from a Tormach 440

Nov 2, 2016   //   by Bob Warfield   //   Blog, CNC Projects, Manufacturing, Techniques  //  2 Comments
VMC Auto Part Loader

I love automation–there’s just something about watching a robot making parts you’re going to sell.  A machinist friend of mine (Hi Peter T.!) refers to his bank of older Hardinge CNC Lathes as his money printing presses.  They sit there with their bar pullers grinding out parts for him to sell all day long and…

Learn What the Parallelism Symbol Means in GD&T

Oct 24, 2016   //   by Bob Warfield   //   Beginner, Blog, Manufacturing, Techniques  //  No Comments
GD&T Parallelism Symbol and Callout

I just uploaded another installment to our Free GD&T Tutorial.

Parallelism callout on a drawing…
Geometric Dimensioning and Tolerances is a methodical and scientific way to specify tolerances on your drawings.  It tells in a concise symbolic way how much your parts can deviate from the geometric ideal.  If you do much CNC work, you’re…

26 Killer Ideas to [Organize] Your Workshop Now

Oct 20, 2016   //   by Bob Warfield   //   Blog, CNC Projects, Techniques  //  6 Comments
Shelving with steps

If your shop is like mine, you’ve managed to fill it with so much stuff (your treasures) that it’s a mess. You’d like to up your organization, but this isn’t just a matter of adding a couple of shelves here and there.  You need more powerful organization ideas if there’s to be any hope.
We’ve…

Get Goldilocks Feeds and Speeds for Best Speed and Longest Tool Life

Oct 18, 2016   //   by Bob Warfield   //   Blog, FeedsSpeeds, Software, Techniques  //  No Comments
Feeds Speeds Porridge

Many machinists, especially brand new and hobby machinists, probably think performance and tool life don’t go hand in hand.  You choose one or the other and let the chips fall where they may (sorry!).  But it turns out that there is actually a middle ground that’s good for both performance and tool life, and it’s…

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