Thread: how much spine wear is to much

Just do the math on it.

You can do basic trigonometry to get an idea of what bevel angle your going to get.

In order to do this and get a fairly accurate angle it's easier to work in metric, And you have to split the razor into 2 right angles triangles.



Work in 2 triangles.

So take the total spine width, Then divide that width by 2 to get your 2 triangles. {a}

Then measure the Hypotenuse, This is the distance from the widest point on the spine (usually the top of the spine wear) to the tip of the edge. {c}

Using this calculator Right-Angled Triangle Calculator

The red letters above are correct for the calculator note case sensitive.

The resultant angle {A} Will be half of your total bevel angle. So multiply this figure by 2.


You can either use trial and error to get the correct spine width for and angle of 17-22 degrees.

Or you can work the math the other way to get a ball park figure for spine width by using your desired bevel and Hypotenuse.


To do this

Bevel = 18 therefore angle {A} = 9
Hypotenuse {c}

Hit calculate and it will give you {a} Remember you have to double this to get your total spine width.