Recent content by rolynd

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    HT Oven Help

    Series vs parallel, KenH has explained it nicely, I just add my version here: you can also think of it as pumping water through a hose. At a certain pressure (voltage) you pump a certain amount/volume( Amperage) through a certain diameter (resistance) hose. If you wire the elements in...
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    Grain size Ok so or should I go finer?

    I made a test blade from very thin stock 80crv2 ended up with 1,4mm = 0,055 inch (if my conversion is right) its the bottom one in the pic. I did some testing, nothing overly scientific - just what came to mind and finally broke it to see what it can take. The blade was hardned the normal &...
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    Grain size Ok so or should I go finer?

    Title says it All, I want your opinion on the grain size of a test piece. Steel is 80crv2 - this is a new steel for me so some testing is in order. I hardened a test piece and broke a section off after each step. Top one is after 1x normalize Middle one after 2x Normalizing Botom one after...
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    Bainitic-Martensitic duplex structure in 52100

    There has been so much discussion on the usefulness/or not of bainitic hardened blades - no need to start this again. I prefer my blades fully martensitic and if I need more toughness/flex I differentially temper the spine. But I found this interesting article on the comparison of various...
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    DIY Stonewashing tumbler

    A windshield wiper motor would work. Especially a larger one from a truck would do fine I think. But you will need to supply it with 12V, some run on 24V also.
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    DIY Stonewashing tumbler

    Here is something I made some time ago: A Stonewashing tumbler. I was experimenting with different finishes and wanted to try some stonewashing. As I did not want to spend much on it I quickly slapped something together with Materials found in the shop. I guess it could be done much nicer than...
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    Steel won't harden need help.

    I agree, could be either one of the above mentioned things. If a coupon does not go over 50RC even in water quench something is definitely wrong. Problem could be in the RC testing or its a temperature Problem. Where did you place it in the oven? Flat on the bottom? On a Rack? Did you at some...
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    Proofing my HT oven thermocouple

    Hi Shane, When I want to check my TC I usually use a piece of fine silver, either a piece of wire or clipping from a sheet will do. It has to be fine silver - sterling will not do!. Put it in the oven near tip of TC ,raise temp incrementally and watch when it melts. Fine silver has a melting...
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    Handle inlay, pantograph, possibly collaborative work?

    I have worked quite a bit with ebony, Its a nice wood but the dust makes quite a mess. As for cracking - yes it likes to do this especially when it gets too hot. When resawing handle slabs make sure you dont overheat it . The cracks can be very fine and may not be obvious on the first glance...
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    Sandvik steels

    Another vote for AEBL! I like the ease of sharpening and as said above, its really easy to sharpen to a razor sharpness. It may not stay at medium sharpness as long as e.g ATS34-the gap is noticeable but its not THAT big if you get the HT right. Most factory knives from Sandvik steels are...
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    first blade with thin steel

    Found a vid that shows the process, its in german but pics are still interesting to watch. At min 7:30-8:00 you see how thin the blades are ground, he checks the edge flex on his thumbring. The blades are convex ground hence the wobbling motion of the board the blade is clamped to. After...
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    first blade with thin steel

    Yes, Stress relieve is advised. I had good sucess with hanging long thin blades vertically in the HT oven. This minimizes warp by handling the heated blades. They become quite floppy when hot. Also you have a short window directly after the quench for straightening. I clamp the still warm...
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    Cryo Question

    Thanks a lot Mr.Cashen for answering my Questions! Since I dont have acess to liquid nitrogen and a simple cold treatment is enough to achieve hat I want I will stay with it. The reason for the 3x cryo is now also clear. As said, the results I get are satisfying, the blades are fine and hold up...
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    Cryo Question

    I have a Question concerning Cryo/deep Freeze Treatment. When I use Stainless I work with Sandvik Steels like AEB-L, 13C26, 12C27. I do a Dry Ice/Acetone treatment immediately after HT. According to the Sandvik HT manual there is no holding time at cryo temperature necessary, you only...
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    Handle inlay, pantograph, possibly collaborative work?

    Hello Frank, If you want to do it yourself, take a look at the Pantograph I built for doing some Inlay work here: http://www.britishblades.com/forums/showthread.php?171654-Dremel-Pantograph-for-Inlay-work I admit, its not lettering, but it does any shape you want depending on the template...
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