What angle do you consider a blade sharpened at…

[cbwx34]

Quick question…

If you have a blade that is ground 5° per side (see picture), and you sharpen it at an angle measured 20° from vertical (how it’s measured on the W.E.), do you consider the edge sharpened at 15° or 20° ? (Setting aside the ‘actual angle doesn’t matter’ argument.) I know you’d document it as being sharpened on the 20° setting, but what do you consider it sharpened at?

1 user thanked author for this post.

M1rrorEdge

[tcmeyer]

Grasshopper…  Why do you ask such questions?  You know more of angles than the master.

The apex will have an included angle of 40 degrees, so I consider it 20 dps.  The primary grind (whether 5 or 10 degrees included) is irrelevant when considering the sharpness of the edge.  Angles are always relative to the centerline plane of the blade.  Nicht wahr?

 

3 users thanked author for this post.

M1rrorEdge, dulledge, Josh

[Frans]

tcmeyer wrote:

Nicht wahr?

Jawohl. At least that is what I also believe.

[cbwx34]

Thanks.  Measuring from the centerline is what I thought… then I was watching a video yesterday where it was being measured from the blade’s grind, and it kinda threw me, since I hadn’t really thought about it before.  Never hurts to ask. 🙂

[Author]

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