Thread: Measure your razor angle !!!!!

TI Festonne in snakewood (from RasurPur)
0.198 0.760 14.9
Hard to measure the width. It came shave ready but I can't see any hone marks on the spine. Maybe it was honed with taped spine. Used avg of three measurements since it is a slant grind.

Likewise I have the old calipers at hand and my C-MON.
The spine is .155 thick,distance from edge to just below the spine is .560,and length of the blade is 2.800 from the nose to the 2nd stabilizer,2.9 to the 1st stabilizer(closest to the heel).Not sure if that's the correct area to measure to.

I apologize to all, my blade width measurements were all incorrect, and thus all my angles are incorrect as well. After actually reading the instructions at the start of this thread, I realized I was measuring from the back of the spine to the edge (wrong), rather than from the edge of the honing mark to the razor's edge (correct).

It's late, so I'll re-measure correctly tomorrow and re-post tomorrow or this weekend.

OK, now I have my angles measured correctly.

Resurrecting an old thread, with a bunch of razor data. I was bored, and I just bought stainless digital calipers.

• Measuring Tool: General Tool #147 Stainless Steel Digital Calipers
• Formula used: 2 * ASIN ((Thickness * 0.5) / Width) = Blade Angle
• Calculator used: Calculator Tab
  
• T = Spine Thickness, W = Blade Width, A = Blade Angle
• All measurements in inches, and are averages of three measurements taken along razor length. The non-New and non-NOS razor spine thicknesses reflect minor to moderate hone wear.

Largest Angle: 20.62 degrees, Filarmonica #14 8/8ths
Smallest Angle: 14.30 degrees, Henckels Friodur 8/8ths NOS
Average Angle: 17.73 degrees
Razor Closest to Average Angle: Dorko 8/8ths NOS @ 17.52 degrees

Non-scientific empirical conclusions about the ideal razor angle: Clearly, Filarmonicas really are just better after all. Naw, just kidding! I dunno, they're all over the place, yet all are very fine shavers, this is a list of my favorite razors to use. The Friodur with the 14.30 angle is both one of my sharpest and best shavers, yet one of the most durable-edged razors I have, I can't really explain that.

Maybe I should measure my lousy shavers as a comparison - but I'm afraid they would come out similar.

Dorko 8/8 (NOS): T: 0.2425 W: 0.7960 A: 17.52

Droescher Gold Bug 13/16 (NOS): T: 0.1985 W: 0.7453 A: 15.30

Dubl Duck Goldedge 5/8: T: 0.2020 W: 0.6233 A: 18.65

Filarmonica #13 6/8: T: 0.2415 W: 0.7023 A: 19.80

Filarmonica #13 6/8: T: 0.2368 W: 0.7182 A: 18.97

Filarmonica #14 8/8: T: 0.2835 W: 0.9023 A: 18.08

Filarmonica #14 8/8: T: 0.2940 W: 0.8212 A: 20.62

Filarmonica EPBD 8/8 (NOS): T: 0.2940 W: 0.9051 A: 18.69

Genco Easy Aces 5/8: T: 0.1830 W: 0.6195 A: 16.99

Greaves Sheaf Works 6/8: T: 0.2380 W: 0.7346 A: 18.65

Harner custom 8/8 (New): T: .2320 W: .7978 A: 16.73

Hart 6/8 (New): T: 0.2085 W: 0.7978 A: 15.02

Henckels Friodur 8/8 (NOS): T: 0.2025 W: 0.8133 A: 14.30

Henckels Friodur 8/8 (NOS): T: 0.2350 W: 0.8573 A: 15.76

Le Grelot 1931 6/8: T: 0.2315 W: 0.6982 A: 18.25

Le Grelot #193 6/8 TI Regrind (NOS): T: 0.2420 W: 0.7150 A: 18.49

Le Grelot #52 6/8 TI Regrind Edwin Jagger (NOS): T: 0.2375 W: 0.7018 A: 19.48

Otto Busch Weltmeister (NOS) 6/8: T: 0.2210 W: 0.7498 A: 16.95

Otto Busch Weltmeister (NOS) 6/8: T: 0.2250 W: 0.7398 A: 17.49

Otto Busch Weltmeister 5/8: T: 0.1875 W: 0.6318 A: 17.07

Puma Gold 9/16: T: 0.1895 W: 0.5512 A: 19.79

Taylor Eye Witness 1000 6/8: T: 0.2040 W: 0.6762 A: 17.35

Thiers-Issard (New) 7/8ths: T: 0.2638 W: 0.8363 A: 18.15

Torrey 6/8ths: T: 0.2075 W: 0.6893 A: 17.31

Wade & Butcher "Barbers Use" 8/8: T: 0.2950 W: 0.8877 A: 19.12

Wade & Butcher Diamond 6/8: T: 0.1920 W: 0.6510 A: 16.96

Should the formula be: Formula used: 2 * ATAN ((Thickness * 0.5) / Width) = Blade Angle
Using arctangent rather than arcsin? The answer is close either way, but it does make a difference.

That's why I nicked myself last night. I thought I had my W&B at 19.12, but I might have strayed up to 19.39 or maybe even worse.

Originally Posted by ace

That's why I nicked myself last night. I thought I had my W&B at 19.12, but I might have strayed up to 19.39 or maybe even worse.

That must be it!

Originally Posted by bladeon

Should the formula be: Formula used: 2 * ATAN ((Thickness * 0.5) / Width) = Blade Angle
Using arctangent rather than arcsin? The answer is close either way, but it does make a difference.

Arcsin is correct because you are measuring the hypotenuse.

Originally Posted by bluesman7

Arcsin is correct because you are measuring the hypotenuse.

Sorry, my bad. When I drew it out I was thinking distance from edge to spine, but that's not how it's measured.

Originally Posted by bladeon

Sorry, my bad. When I drew it out I was thinking distance from edge to spine, but that's not how it's measured.

You know about Taylor series - calculate the correction and you'll know how important it is.