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Cal G

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Everything posted by Cal G

  1. Just finished this 1095 / 420 SS San Mai ,with Iron Wood handle and stainless fittings.
  2. Cal G

    SCIAN DUBH

    Just got this little guy finished for a fellow that want to wear it with his Kilt. 52100/15N20 steel ,crushed W's pattern Dyed Masur Birch with stainless fittings.
  3. I did a little work on the weekend rolling out some 420 SS pins and some 52100 to make up some San Mai billets. I love taking pictures of HOT STEEL.
  4. Those diagrams are using the flow divider to preform a regeneration circuit. This one is wrong and will not work. The oil will take the path of least resistance and simple go back to tank instead of back into the flow divider. No matter how you do it you can ONLY have regeneration in one direction (rod moving out of the cylinder). You can never regenerate the rod back into the cylinder. Regeneration in a circuit is accomplished with special valving and not a flow divider for a number of reasons.
  5. A 4" one that would generate ~16 tons @2500psi and 1.6in/sec @650psi and .4in/sec @2500 psi for the press (think Coal Iron Works 16ton press) and a 1" one generating ~1 ton @2500psi and 6in/sec and 1/4 ton (500lbs) @650psi and 26in/sec. I did a quick check and these velocities are correct but at 26 in/sec the forces required to accelerate and decelerate a mass moving that fast would be huge. I do not understand without looking at a schematic how a divider combiner would be used and you state that velocity id 49 in/ sec. With pneumatics you can exhaust the air through the use use of quick exhaust valves to atmosphere but with hydraulics you have to get the oil back to the reservoir through valving and filters. A small cylinder is not going to take the forces and shock loading with the velocities that you are describing in this application. Your HP calculations are theoretical. Allowing an additional 15% for efficiencies HP required would be a bit more. 1.37 GPM @2500 Psi HP=P x Q /1714/.85= 1.37x2500/1714/.85= 2.35HP 5.27 GPM @650PSI =5.27 x 650/1714/.85 = 2.35 HP
  6. I have designed hydraulic system for over 40 years and believe me this isn't going to work with the parameter you have laid out here. That is why hammers are either mechanical or pneumatically operated.
  7. Forged from 1080/15N20 stretched crushed W's, Desert Ironwood handles with stainless fittings.
  8. A friend of mine acquired this knife and apparently it appeared on the cover of a knife magazine from the 70's. The knife has a makers mark J.M.M. and it was engraved by Shaw Leibowitz . I can find info on the engravers but was wanting to see who the maker was and if it actually did appear on the cover of a 70's knife magazine. Any help would be much appreciated.
  9. 1080/15N20 forged by maker, eyed crushed W's with stainless fittings and a Walrus handle.
  10. Just finished this up to end the year, 52100/ 420SS San Mai hunter in Tiger G10
  11. Don, someone told me it was carbon migration from the 52100 into the 420SS, I am not a metallurgist so I will leave that up to the experts. I know it does not happen when you use a 300 series SS. That is what makes this so interesting, it is an exact mirror image of how the 52100 is offset in the 420 SS with a shiny 420 SS line of separation.
  12. 52100 /420SS San Mai with dovetailed stainless bolster and G10 handle.
  13. 52100 core with 420SS sides,dovetailed bolster and an Ironwood handle.
  14. Here is the process I have been using for years. When I first started making sheaths the stitching was so ugly the knives wanted out of them. You will have to use your imagination a bit because i do not have a sheath on the go that i am making so I will show you the jigs and the finished sheath. First of all my sheaths are glued together with drilled holes for stitching. I use a number 55 drill bit ( .055 )inches to drill the holes and spin it quite fast in the drill. I also use a couple of jigs to hold the sheath in place and at 90 degrees to the drill bit. hold the sheath flat on this jig and drill the holes up to where the contour of the sheath changes the part that is cut away on the end of this jig is ground in a curve shape to adjust for different thickness of belt loops using the second jig place the sheath on it in the appropriate position and hammer in a couple of small finishing nails to hold it in place so you can drill the holes at the back of it. I usually line it up at 90 degrees to the drill bit and place a piece of scrap leather under the space at the back to it does nor bend down as you are drilling.
  15. RPM is good it might be a little short on HP @1/3 ,however I have seen disk grinders guys have made from old furnace motors that are 1/4 HP. Mine are 1200 RPM and 1/2 HP.
  16. 1080/15N20 twisted crushed W's ,stainless dovetailed bolster.
  17. Alan it will be as flat as flat can be using the 1 degree. Most people can't hold anything with even pressure and get it flat even on a flat surface. I agree, theoretically in a perfect world it will have a very slight concave but unless you are using sophisticated instrumentation you will never measure it let alone see it.
  18. Gerhard there will be no bump in the paper. This is the disk that Beaumont makes and it has a 1 degree bevel. Read their description.
  19. Just a couple of things to mention. The disk face should be machined with a 1 degree angle on it. This prevents a blade that is longer than the radius of the disk from getting stuck in the disk on the opposite side of center. A flat disk is an accident waiting to happen,get the tip of a blade stuck into it and you wake up REAL fast. Most people glue cork on the face of the disk, I find that it wears out and does not last. I contact cement on a piece of rubber gasket material about 1/8 inch thick to the disk face and it last for years.
  20. Alex you are right, that is the only way to get them. Here are a few picture to show how it is done.
  21. Gerhard, I love my disk grinders and have a number of them in my shop....... could not make a knife without them. Here are a few pictures to give you some ideas. Motor speed (1/2 HP)on my grinders is 1200 rmp , which is a bit fast on the 12 inch wheel. The horizontal grinder came from a metallurgical lab in a steel mill where a friend of mine worked. It is variable speed and has a water drip for the grinding disk.
  22. Only three layers, 52100 core and 420 SS on each side. The other two (appearing to be layers) on the spine are in fact the transition zone that is seen in the side view of the blade. Sharp eyes ...!!!!! , most people would miss that.
  23. A little San Mai 52100 / 420 SS skinner with maroon Micarta scales
  24. Tyler I have been heat treating with salt for about 20 years and it is the only way to heat treat as far as i am concerned. As pointed out, safety has to be the number one issue, protective gear is a must and serious design consideration of the pot is a must. I use KCL for my salt as one of the biggest Potash mines in the country is just down the road 20 miles from where I live. They produce thousand of tons of the stuff and the product is 99.9 % pure. Here are a couple of photos of my pot and heat treating some knives our club donated to the Canadian Military in Afghanistan a number of years ago. If you want some KCL I have two bags I want to get rid off, send me a pm with your e mail.
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