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ahhh - that may indeed be the lightbulb I am missing! Thank You! Will

My apologies - people keep saying this, but I seem to be too dense to completely understand. It would seem to me, that with a 2-flute (well, 2 cutting edge) cutter, you get constantly oscillating sideways forces. When the cutting edges are "across" the slot - one entering the material and one...

Which is to say, SteveM feels it's inappropriate that people are suggesting that the method at least deserves a mention of caution, since it's not going to lead to dismemberment. I won't wait for an apology.

The number of people defending "Jim's approach", who seem to have not actually watched the video, is rather depressing. I am truly disheartened by SteveM, Cogsy, and the rest of the crowd who seem to think that it's not worth trying to avoid accidents or unsafe practices unless they're likely...

I seriously hope that no-one here is engaging in the "sport" of machining for the adrenaline-rush of leaving the shop at the end of the day with all of their fingers still attached! If you are, I'm gonna suggest that you might be doing it wrong...

I can see that. If I were to show one of my friends something equally dumb-but-not-life-threatening, I'm pretty sure that a good number of them would be saying "Yup, Go for it Will! Here, I'll hold your beer!"

I'm sorry, but did you actually watch the video, or are you just arguing with the "safety nazis" just because you think they're safety nazis? The cutter was being held in a pair of (modern-day irwin's version of) channel-lock pliers, which rely on grip strength to hold the part. The forces...

I know it's off topic, and I know what you meant, but I'm sorry, I can't help myself... You do realize that you literally said that you'd rather be doing, exactly what you said life is too short for?

The reason that you get non-round (roughly reuleaux-triange shaped, actually) holes when you try to drill sheet metal with a 2-flute drill, is because it's energetically favorable for one cutting lip to "dig in" and stop, while the other cutting lip pivots around the stationary one, cutting a...

I feel and share your pain: Yes, that was the 30-inch model. Fires suck. Don't do it.

Before everyone starts misusing "Land" as the term to for the chisel edge on the web of a drill bit, please: Viking Drill Bits : Drill Terminology The land is the non-cutting space between the flutes - bassackwards of the structure of firearms-rifling (though consistent with "the land is the...

You need to tell us what you're actually drilling, what you're drilling with, and what kind of holes you're drilling. "Mild steel" - if it's really mild steel and of any reasonable quality - really won't harden much, almost nomatter what you do to it. "Mild steel" as found in mystery-metal...

Please do. I think the fact that the .225 countersink diameter is the specified dimension, and what ought to be the thing measured for compliance, is perhaps overlooked by many readers because they don't immediately see a way to measure that dimension.

Greetings IanN, As you've described the part and feature, it's not over dimensioned :-) Were it over dimensioned, the its tolerance problem would be a subset of the "you get different dimensions (and tolerances) depending on which way you work the numbers around the part" problem.

Delighted to hear that you, your power, and your lathe are all back up and at it! Best wishes, Will

Hi Richard. Mostly, I was railing against the suggestion that "Don't overdimension a drawing is a useless holdover from the days of manual drafting", and that since "computers don't make drafting errors", this convention was now irrelevant. I'm sure you are already familiar with the issues...

Actually, it can be a bit worse than that. You need to understand and choose appropriately so that you don't lose the design intent, when making choices about which dimensions to carry through to your production process. With the right-triangle example, if you choose to carry the hypotenuse...

Sadly, no, it is not impossible - or at least not impossible for a feature to have two different dimensions "in the drawing" depending on which dimensions you add/follow to arrive at the feature's specification. And this is why it remains important to not over-dimension parts. If you would...

Richard, I was just quoting the figure being discussed in a previous post. However, I would suggest, if you're going to make "eh, close enough" approximations for an alternative dimensioning strategy to the "82 deg at .225 diameter" specification, that it would be wiser to choose .063 depth of...

I'll stop flogging the dead horse after this, but -- how would a go/no-go gauge be set up for that operation, based on your proposed "specification" for that feature, which provides an instruction for creating the feature, but no specification for its dimensions? hint - following your...