by Bob Warfield | Blog, CNC Basics, Feeds and Speeds, Tools and Techniques
What is Spindle Runout [Definition and Meaning]? Spindle Runout, or Tool Runout, as it can also be called, is the inaccuracies that cause a tool (in a mill) or workpiece (in a lathe) to spin off the ideal axis. It’s very bad for tool life, so it’s...
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by Bob Warfield | Blog, Feeds and Speeds, Tools and Techniques
It should be no surprise that I consult with a fair number of people who have problems breaking tools and wonder why. I’m happy to help as I have written extensively on the subject and sell the world’s best feeds and speeds calculator (even if I do say so...
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by Bob Warfield | Blog, Tools and Techniques
All CNC machinists have encountered the ever-present “drive dogs” that are prominently visible on a multitude of tapers: Spindle Drive Dogs… They’re the two little “ears” that engage notches in the toolholder. Not every taper...
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by Bob Warfield
Free GD&T Calculator [ + Much More ] Start Now, It's Free! Easy Guide to GD&T: Circular Runout[ Symbol, Tolerance, Measurement ] GD&T Circular Runout Symbol Definition of Circular Runout In GD&T, Circular Runout defines a circular tolerance zone...
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by Bob Warfield
Free GD&T Calculator [ + Much More ] Start Now, It's Free! Easy Guide to GD&T – Total Runout [ Symbol, Tolerance, Measurement ] GD&T Total Runout Symbol Definition of Total Runout In GD&T, Total Runout controls how much a feature or surface...
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by Bob Warfield | Blog, CNC Manufacturing & Job Shops, Tools and Techniques
Lights Out Manufacturing: Definitive Guide + 21 Tips Lights Out Manufacturing: let the machines keep working after you go home. It’s the next step for greater productivity and profitability in manufacturing. This Guide shows you how to start doing Lights Out...
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by Bob Warfield | Blog, Feeds and Speeds
G-Wizard Calculator Feeds and Speeds Examples for Experienced CNC’ers Using High Pressure Through Spindle Coolant for Better Feeds and Speeds I’ve chosen to start here because if you have High Pressure Through Spindle Coolant on your machine, you know how...
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by Bob Warfield | Blog
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by Bob Warfield | Blog
Why CNC for a Home Shop? There is a good discussion over on HMEM where someone asks why anyone would want CNC for a home shop. Their shop instructor told them that for less than 3 identical parts, manual machining could do it faster and cheaper. Here was my response:...
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by Bob Warfield | Blog, CNC Projects, DIY CNC, Tools and Techniques
Drill Press Attachments and Drill Press Upgrades The lowly drill press is often the first machine any shop obtains, followed closely by a horizontal bandsaw and a bench grinder. While you can’t really mill very successfully with one (I’ve tried, LOL!),...
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by Bob Warfield | Blog, Feeds and Speeds, Tools and Techniques
Increase Tool Life, Reduce Tool Wear [ Easy Guide ] This guide will show you 11 ways to radically increase your tool life and reduce tool wear. For details and mechanisms of tool wear, discussion of how to calculate tool wear, and descriptions of tool life monitoring,...
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by Bob Warfield | Blog, CNC Basics, Feeds and Speeds, Software, Tools and Techniques
Feeds and Speeds: The Definitive Guide (Updated for 2024) Should you seriously consider CNC, it becomes essential to maximize your Feeds and Speeds. The reason being, feeds and speeds constitute the basis for achieving the best: Tool Life Fastest Machining Time (MRR)...
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