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  1. Chris Cramer

    Horizontal band saw

    Ive been thinking of building a virticle metal band saw with my 3 phase motor instead of a lathe due to the limited space I have. Personally I don't understand the point of using a band saw horizontal instead of a miter saw or cutting a plate straight forward. The great benefits of a band saw's...
  2. Chris Cramer

    Blade smithing

    You supply your own. The dewar I got from Vevor is only 3L, and I was unaware that the minimum they can fill is 4.5L, so I'll probably have to get a 6L dewar, and find a way to influence Vevor to allow me to return the 3L dewar.
  3. Chris Cramer

    Blade smithing

    I contacted praxair which is Linde now, and the cost for only 4.5 L of LN is $180! I'm not sure how long only 4.5L would last, and if it be worth the cost of $180.
  4. Chris Cramer

    Power feed

    Is every other axis of the milling machine still controlled by hand? If every handle to rotate the lead screws were removed, and each lead screw was attached to a stepper or servo motor, then I'm thinking it wouldn't be too difficult to turn one into a CNC machine. I'm not sure how many...
  5. Chris Cramer

    Induction forges

    The induction forge has gone fairly well. I finished wiring a fixed multimeter ment to keep track of a device's amperage, voltage, power, and energy. The heater still works as well as it did when I first tested it, but the potentiometer I installed that is normally used for dc motor control did...
  6. Chris Cramer

    fume extractors

    I finished that fume extractor quite a while ago, and it works well for extracting fumes; but on the other hand, I am trying to build a well working downdraft table where I do my frequent grinding with my belt grinder and angle grinder. The fume extractor does have enough air flow to capture...
  7. Chris Cramer

    fume extractors

    . I finished putting together this extractor with 2 inline fans connected to some flexible solid aluminum duct welded to a mechanical arm that I designed. The arm rotates on a steel plate mounted to the wall, and holds its position on both joints with a series of strong springs.
  8. Chris Cramer

    Blade smithing

    I did some more research on cryogenic treatment of alloy steels in LN vs dry ice, and it turned out that the difference in hardness between steel cryo treated in LN vs dry ice would make it worth purchasing a dewar for LN. I got a 3L dewar from Vevor for 200 dollars, but it comes empty, where...
  9. Chris Cramer

    Blade smithing

    I've now furnished the bowie knife that I began working on before my meat carving knife. This blade was also made out of CPM magnacut, for the performance as a hunting knife or survival knife. The edge is extremely sharp, and slices through wood just like a swiss made carving knife. The balanced...
  10. Chris Cramer

    Induction forges

    I just received a 48v 50 amp power supply for my 3000W induction heater, and tested it out for the first time. This power supply delivers enough current to allow the induction heater to heat thicker metal stock. You can tell that it is drawing more current as you run thicker stock through the...
  11. Chris Cramer

    Induction forges

    https://www.amazon.ca/gp/product/B07ZTMD65Y/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1 I just received this induction heater which requires even more power than the other. It barely heated a 3/8" steel rod with my 30v 10a power supply, but I know it works, I just need more power input.
  12. Chris Cramer

    Induction forges

    I tested the induction heater, and it does work, but I don't know if it performs as well as it should have. I used a 30v 10a power supply which heated a 3/16" steel rod pretty slowly. The water pump circulates water from a bowl of water through the copper tube and back to the bowl which works...
  13. Chris Cramer

    Induction forges

    How much voltage have you tried using it with? The more voltage the more current and power is generated. Several people have used the 1000W modules with a 48V power supply and are able to heat items as thick as 1”.
  14. Chris Cramer

    Induction forges

    According to the information on Amazon the coil is 50mm. I don’t know if that refers to the inner or outer diameter, but the crucibles I ordered are 50mm as well and different heights. If they don’t fit then I could either widen them or make another one with some copper tube.
  15. Chris Cramer

    Induction forges

    I’ll have to find a good way to seal the mini water hose, but even if a small leak does happen, it is only a very small quantity of water moved by the mini water pump. Commercial induction heaters pump cooled water through the coil from a small reservoir, that is cooled continuously to get rid...
  16. Chris Cramer

    Induction forges

    I see. I’ll make a video of my build if it works fine, so every one can feel more confident purchasing the unit. I’ve looked at some commercial units online that look pretty similar to a welder and plasma cutter. I’m a bit curious about how it would work for someone to use an old welder as a...
  17. Chris Cramer

    Induction forges

    What do you mean? I have watched several videos on how to build an induction heater, I was about to order the parts from digikey; but none of the videos use a water cooling system for the coil, they only cool the mosfets with the fan. That's probably because they are only 1KW but this one is 2.5KW.
  18. Chris Cramer

    Induction forges

    I just ordered that induction heater along with a set of graphite crucibles. I should receive them on Thursday. It’s probably only $100 because it’s a kit of parts. I like that because it allows me to design a more custom machine; but, of course I’ll test the unit before I add to it. The only...
  19. Chris Cramer

    Induction forges

    Amazon has several high powered induction heaters available for around $100. They also have some lower powered heaters. I don't know how much I should trust this unit, because of the fewer reviews, but I think it would still be better than fabricating one myself...
  20. Chris Cramer

    Induction forges

    I was doing some research on building a good coal forge, when I came across an article on the induction forge/heater. Depending how much it would cost in electricity, a heater that efficient would be very useful for wrought iron work, and maybe blade smithing if the coil were big enough...
  21. Chris Cramer

    Blade smithing

    Yeah, I ordered that book a while ago, along with a book on Damascus steel. It has a lot of useful information.
  22. Chris Cramer

    Blade smithing

    I followed the best heat treatment given by Larrin Thomas, the designer of the metal. I used plate quenching to prevent the thin 12 gauge blade from warping.
  23. Chris Cramer

    Propane ribbon burner forge build

    Does a ribbon burner not use any orifices to force the gas, or is it inside that box? In other words, how would the propane be evenly spread out every hole?
  24. Chris Cramer

    Blade smithing

    I finished my meat carving knife forged out off the new CPM magnacut. In comparison to some high performance steel like cpm 4v with high vanadium, the powder metallurgy and slightly lower level of chromium gives it higher corrosion resistance along with the balance of high hardness and...
  25. Chris Cramer

    Propane ribbon burner forge build

    I've been thinking of making the same sort of cart for my shop. My propane forge is too small to fit the larger items like the skillet I forged, so I'm planning on building a coal forge for that purpose. The thing is I would need to find a way to fit both the coal forge and the propane forge in...
  26. Chris Cramer

    Propane ribbon burner forge build

    I like the idea of the ribbon burner! That would spread the heat much more evenly. My current propane forge that I purchased from Hall Knife and Forge is a rectangular forge with three large burners pointing straight down. That definitely creates some hot points, but that forge is only used for...
  27. Chris Cramer

    Sourcing Metal | General Discussion

    Titanium is actually very soft compared to high carbon steel, or stainless steel; the highest Rockwell hardness you would find with a titanium knife is 55.Titanium has a high weight to strength ratio, and high corrosion resistance, so it is primarily used to reduce weight, and for water...
  28. Chris Cramer

    Sourcing Metal | General Discussion

    Because of titanium’s high strength to weight ratio, and high toughness, makes it suitable for high performance aircraft and spacecraft frames and components. It also has very high corrosion resistance, especially to chlorine which makes it useful for sea water/ marine frames.
  29. Chris Cramer

    Sourcing Metal | General Discussion

    Has anyone been to metal works Canada, here in Calgary to purchase their metal? I haven’t heard that they have a minimum purchase, and they do sell their off cut pieces for less; however I don’t know if they are any cheaper than metal supermarket.
  30. Chris Cramer

    Sourcing Metal | General Discussion

    Titanium in itself is usually used for tools, and hardware. Titanium when it comes to knife making is mostly used as an alloy in addition to carbon steel for higher hardness and corrosion resistance.
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