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Thread: What is the line running down the length of the blade?

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    Senior Member ProudMarineDad's Avatar
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    Default What is the line running down the length of the blade?

    I tried a search in the forum but didn't see this addressed.
    When you look at the blade in the light and tilt it you can see a "line" running along the length of the blade about 3/16" from the edge.
    A friend told me he had heard this had something to do with the quenching process when the blade was manufactured or something and I was curious if anyone here could educate us on what that line is exactly?
    If this is the wrong forum for this topic I apologize. I wasn't sure whether to post it here or the "Razors" forum.

    Thanks
    Last edited by ProudMarineDad; 09-27-2013 at 07:40 PM.
    My son is a Drill Instructor in the United States Marine Corps at Parris Island, SC

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    Senior Member kwlfca's Avatar
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    Senior Member blabbermouth
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    I am thinking you might have a "bellied" blade. Can you feel a slight bulge along that line?

    Bob

    Viewed end on from the toe, looks something like this.

    Last edited by BobH; 09-27-2013 at 07:44 PM.
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    Senior Member ProudMarineDad's Avatar
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    Yes Bob I believe that is what it is. Is this normal? It's very pronounced on my Shutmate Tungsteel especially.
    My son is a Drill Instructor in the United States Marine Corps at Parris Island, SC

    Mike

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    Senior Member cosperryan's Avatar
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    Some makers do it I believe to give strength to the blade to make up for the extreme hollow of the blade. I may be mistaken though but I thought I read that somewhere. I know my Dovo Pearlex has it.

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    Senior Member kwlfca's Avatar
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    Senior Member blabbermouth
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    PMD - I didn't know Shumate made a belly'd blade. I have a small Tungsteel (only 4/8 blade I keep *and* use). Its just hollow. I suspect if that's the way its made - that it would be one of the more rare birds for that company. I'll bet it shaves well.

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    Senior Member blabbermouth
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    Quote Originally Posted by ProudMarineDad View Post
    Yes Bob I believe that is what it is. Is this normal? It's very pronounced on my Shutmate Tungsteel especially.
    I don't know how normal it is. I think some makers use it on large, guessing again, 6/8 and up as a longitudinal strengthener for an extremely hollow blade. I don't know how common it is especially on American razors but was surprised to notice that my Genco Henry's X was bellied. I hadn't noticed it when I got it and honed it. I am guessing some are more pronounced than others.

    Bob
    Life is a terminal illness in the end

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    Senior Member ProudMarineDad's Avatar
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    Thanks Bob. I see it in my Genco "Magnetic Steel" 5/8 razor as well as my Shumate "President" too. Actually I see it in all my Shumates but it is not as pronounced on the Tungsten, Vulcan, Peacemaker and Barber
    My son is a Drill Instructor in the United States Marine Corps at Parris Island, SC

    Mike

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    Senior Member blabbermouth 10Pups's Avatar
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    Is this not what they call double hollow? They use 2 different size wheels when they grind it. A large wheel makes the first cut and they come back with a smaller wheel near the spine leaving that belly for strength along the length of the blade. It gives the blade some slight flex while you use it.

    I imagine it working to help keep an even pressure on the skin while making a pass. Allowing for slight changes in the angle of the blade by the user and helping it stay proper. Now that is just >me< thinking right now but I have read about this a few times before. Being a Dubl Duck user I have always thought that that name was descriptive and not just because of the 2 ducks on the tang :<0)
    Good judgment comes from experience, and experience....well that comes from poor judgment.

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