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Thread: My bevel angle calculations

07092009, 02:45 PM #31
Bruce, I've never quite grasped the 30 degree shaving angle suggestion either. If the bevel angle is 20 degrees, does that mean I should lift the razor off my face another 10 degrees, another 20 degrees, or another 30 degrees? Even if I knew, I don't think it would help as I really cannot afford to attempt taking such a measurement while shaving
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07132009, 05:00 AM #32
Sorry for the late response, haven't checked this thread in a bit! What you mentioned in the first long paragraph could work just fine too. You can easily just measure the width of the spine and the bevel with the tape on and substitute these values into the original (simpler) equation and not have the need for an extra variable (i.e. tape thickness) and you wouldn't even need to know the thickness of the tape in the first place. This is, like you mentioned, simpler and more practical. To be honest I derived the second formula just to see what it would look like and for fun. But it would be more prone to error since you are using a given value of the thickness of the tape when it may not be as exact as if you actually measured the thickness of the tape on the razor. Also, if you added tape you'd be removing some metal from the edge also, shortening A as labelled in your diagram. I'm sure you could find some fancydancy (yes, that is a mathematical term) formula that measures the bevel angle but also takes into account the amount of the wear on the edge given the grit used, the weight of the honer, the day of the month, what colour shirt you are wearing.......etc.....etc....
But for all everyday bevel angle calculations (which I honesly don't do or really care about), it would surely be easier to make the measurements with the tape actually on the razor and use a simple equation. But what's the fun in being practical when you can use some convoluted math equation that makes everything more difficult?

The Following User Says Thank You to StraightRazorDave For This Useful Post:
BeBerlin (07132009)

07152009, 01:47 AM #33
 Join Date
 Jun 2009
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Thanked: 10So judging by this thread: since I'm a newbie and don't have a degree in mathmatics, I should wrap my razor in my favorite, highquality electrical tape and send it to my local scientist to have it honed?
Last edited by SlickWillyTFCF; 07152009 at 01:59 AM.

The Following User Says Thank You to SlickWillyTFCF For This Useful Post:
BeBerlin (07152009)

07152009, 01:58 AM #34
I read through this whole damned thread to find a gssixgun post for pure entertainment...and the bastard didn't even post!
You owe me 5 minutes of my life Glen!!...Of course you can always buy me a beer instead.

07152009, 03:59 AM #35
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LMFAO Mark...
I am waiting for the conclusion to the thread, which from my real life experience, I will guess that each layer of 3M tape will add just barely over 1/2 of one degree of angle change to the average edge, which will accomplish much to save the spine and the stone but little else that is provable...