Thread: Why Rotate?

Hay, fat panda look at carriem's answer. I said that on purpose.

Originally Posted by jbcohen

Hay, fat panda look at carriem's answer. I said that on purpose.

I am sure you did. Unfortunately, your message is completely out of context. I strongly recommend that you familiarise yourself with the minimal technical requirements for participating in a public discussion. Or stick to carrier pigeons.

Originally Posted by BeBerlin

I am sure you did. Unfortunately, your message is completely out of context. I strongly recommend that you familiarise yourself with the minimal technical requirements for participating in a public discussion. Or stick to carrier pigeons.

I think some people follow the on-screen instructions:


I must try out that tree view.

Originally Posted by Rajagra

I think some people follow the on-screen instructions:

Doesn't matter, that one will keep the threading intact as well.

Thank you all for your great replies! It does seem like to some it is a preference, and to others it may not be necessary. I am really curious about how facial hair can actually deform steel! I am a civil engineer and I remember some material laboratories in undergrad where we would yank on a steel bar until it yielded and eventually snapped. A Ton of force! How on earth can facial hair deform a blade? Is facial hair harder than steel?

Anyways, I have 4 blades here that I am sure I will be rotating according to my heart's content! The more important issue that I am wondering about is if different grinds feel different on a strop (say a wedge vs full hollow)?

Also, when learning how to shave with different grinds, is there a big difference between say a wedge and a full hollow?

should extra attention go into the shave when changing grinds?

Originally Posted by fatpanda

I am really curious about how facial hair can actually deform steel! I am a civil engineer and I remember some material laboratories in undergrad where we would yank on a steel bar until it yielded and eventually snapped. A Ton of force! How on earth can facial hair deform a blade? Is facial hair harder than steel?

Pressure (symbol: p or P) is the total force acting across (not along) a surface divided by the area of the surface. And a razor's edge is microscopic.

Originally Posted by fatpanda

Anyways, I have 4 blades here that I am sure I will be rotating according to my heart's content! The more important issue that I am wondering about is if different grinds feel different on a strop (say a wedge vs full hollow)?

They give different feedback, and make different sounds. You might find the following passage useful: Razor stropping - Straight Razor Place Wiki

Originally Posted by fatpanda

Also, when learning how to shave with different grinds, is there a big difference between say a wedge and a full hollow?

There is for me, the main difference being feedback. A wedge will give you next to zero, because it does not flex, or sing. This caused me to apply more pressure initially ("Hm. Doesn't make a sound, doesn't really respond. Let's try harder. Ouch, that bleeds.").

Originally Posted by fatpanda

should extra attention go into the shave when changing grinds?

Initially, I think you should, and instinctively will. Wedges can be serious fun, once properly honed.

Originally Posted by BeBerlin

Pressure (symbol: p or P) is the total force acting across (not along) a surface divided by the area of the surface. And a razor's edge is microscopic.

So you are saying that when you push the edge against a hair the reaction force back on the blade from the hair is acting over a cross-sectional area that is micrometers thick... ok now I get it, so this stress with cause the blade to become more serrated like a bread knife?

Originally Posted by BeBerlin

There is for me, the main difference being feedback. A wedge will give you next to zero, because it does not flex, or sing. This caused me to apply more pressure initially ("Hm. Doesn't make a sound, doesn't really respond. Let's try harder. Ouch, that bleeds.").

So go easy on the wedge! got it!

Originally Posted by jbcohen

Hay, fat panda look at carriem's answer. I said that on purpose.

I don't understand what you are talking about...