Thread: Latest custom builds

Thanks. Yes, I used the phrase 'razor shaped object' not to be insulting, but because it looks like a fine razor which is missing a structurally important element that is a key difference between a razor and a knife or microtome (which does have a completely flat grind).

Plain text communication always loses the information that would be present with intonation and body language. A simple phrase like 'that's nice' can be enthusiastic, sarcastic, insulting, bored, and many other things, but by changing the way it is spoken.

In any case, I did not intend to be condescending.

Originally Posted by 3Drew101

Thanks Brono, and I will indeed continue to do whatever I want, and learn with every new razor shaped object I make and you are correct "several people have informed and indeed tried to HELP me and I have listened and I will try to do better in future.
I will go away and think very carefully on all of you constructive words and will try to do something that will meet with your approval in the future.


Or I could just "feck it" and do what I want to do as long as I'm having fun doing it I'm going to keep on doing whatever looks good. I've added another image showing a section through the offending razor shaped object, I don't know if they are correct or even if they are closer than the last one I posted but if someone wants to check them please do. Like I said only my 5th razor and I'm still learning.

Attachment 172126

In this picture I actually get how you maintained a thin spine and close to razor geometry. Very cool IMO. I wouldn't have thought to start the grind that far down from the spine.

Ok I've just measured the big blade again and with the spine measuring 5mm across and the blade angle starting nearly 6mm from the spine it gives me a ratio of 4.715:1
So why can't I call this a razor? I know it should be between 4:1 & 3.5:1 but it's bloody close. So what structural important element is it missing?? Can someone please explain as I'm begging to feel a bit thick!!

Originally Posted by 3Drew101

Ok I've just measured the big blade again and with the spine measuring 5mm across and the blade angle starting nearly 6mm from the spine it gives me a ratio of 4.03:1
So why can't I call this a razor? I know it should be between 4:1 & 3.5:1 but it's bloody close. So what structural important element is it missing?? Can someone please explain as I'm begging to feel a bit thick!!

I think that when you measure from spine to edge verses start of grind to edge it vastly changes the grind angle. Effectively creating a wider spine though the spine isn't actually that wide. Your geometry is correct.

The distance between the lines is the actual blade width. The extra 5mm don't play into the geometry. They're just aesthetic to make the blade appear wider.

Here you go.


http://straightrazorpalace.com/advan...-theories.html

and here

http://straightrazorpalace.com/razor...zor-angle.html


There are Google friendly formulas right there and instructions on how to measure accurately


As you can see the target of the Vintage razors was 16° or pretty close but the variance can be up or down from there depending on the Steel Factors and Grinds

Well, you certainly have a good eye for style and design. Once you get your geometry issues sorted, you will be on a winner. Don't get discouraged. Everyone who has commented is trying to help. But if you gonna do it, might as well do it right.

The thing is the geometry on the other two in this post is spot on but everyone seems to have forgotten about them

There are two elements that affect bevel width - one is geometry and whatever you say, a ratio of 4.7 against a target of nearer 3.5 is a long way off. The second element is the amount of metal behind the bevel - this is where hollow grinding comes into play. Take a look at some hollow ground razors such as Filarmonicas - the metal just above the bevel is almost a straight line. Well to a naked eye it is. That's why the bevel is tiny and yours is not.

Originally Posted by 3Drew101

The thing is the geometry on the other two in this post is spot on but everyone seems to have forgotten about them

Hard to catch a break, eh, Drew? Welcome to my world!

OK. Here we have a gennywine true wedge. A lipshaw microtome blade. (shave with this!)
It is 37mm from top of spine to edge. The spine is 10mm. The frameback that installs to strop and hone is 16mm in diameter. With the frame installed, the width from where the frame contacts the hone to the edge is 30mm. This produces a 1mm bevel (somehow!) . Wot is the angle with the frameback installed?



On your mark, get set, GO!