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Recent content by jamesepdavis

  1. jamesepdavis

    SOLENOID RELIABILITY

    dgallup, per your earlier suggestion i pursued 430fr. it was as hard to get as bfm and had the flux disadvantage. the cmi-c is cheap and has quick delivery. my testing paid off. we can use cmi-c and go into the sunset. jim
  2. jamesepdavis

    SOLENOID RELIABILITY

    I NOW THINK YOU COULD USE ANY STEEL LIKE L1214. THE BIG ATTRACTION OF SI-I IS THAT THE WHOLE SOLENOID RUNS COOLER BIG TIME. THE COIL DOESN'T GET AS HOT, THE COIL RESISTANCE STAYS LOW AND THERE IS NO DEGRADATION IN HIT POWER. I'M GOING TO HAVE A RUN AT CARPENTER TOMORROW. I TALKED TO THEM...
  3. jamesepdavis

    SOLENOID RELIABILITY

    TO ALL HANDS WHO KINDLY RESPONDED TO MY QUERY. YOU WERE RIGHT THE FIRST DAY. IT WAS THE BEARINGS. I WAS RUNNING THE UNIT ON ITS SIDE IN THE TESTSTAND SO ALL THE BEARING LOAD REMAINED IN ONE SPOT. IF YOU PICKED UP THE COLD SOLENOID IN YOUR HAND YOU'D SAY "WHAT BEARING WEAR?" BUT RUNNING...
  4. jamesepdavis

    SOLENOID RELIABILITY

    ALL HANDS, YOU'LL RECALL THAT NO ONE WAS CONVINCED ABOUT "MAGNETIC AGING", BUT I AGREED TO PURSUE CARPENTER BFM ANYWAY. I FOUND THE ONLY 2.5" DIAMETER, 6" LONG PIECE OF BFM AVAILABLE ON THE PLANET AT SCIENTIC ALLOYS. CARPENTER WON'T HAVE ANY UNTIL AFTER THE FIRST OF THE YEAR. WE MACHINED...
  5. jamesepdavis

    SOLENOID RELIABILITY

    dgallup, I THOUGHT YOU WERE SUPPORTING THE CARPENTER METALURGIST THEORY ABOUT "MAGNETIC AGING". I THOUGHT YOUR COMMENT ABOUT 600,000,000 CYCLES SUPPORTED B-FM RESISTANCE TO SUCH. I WAS GOING TO ASK HOW THAT DATA CORRELATED TO OUR EXPERIENCE. I AGREE THAT I HAVEN'T SEEN ANYTHING TO EXPLAIN...
  6. jamesepdavis

    SOLENOID RELIABILITY

    dgallup, THANKS FOR YOUR INSIGHTS ABOUT B-FM. CARPENTER IS SENDING A SAMPLE OF OUR SMALL DIAMETER NEXT WEEK. A LARGER DIAMETER SAMPLE WON'T BE AVAILABLE UNTIL END OF DECEMBER. AS YOU KNOW CARPENTER ONLY BUILDS TO ORDER. IS THERE ANY OTHER SUPPLIER OF SILICON IRON ON THE PLANET? I'VE BEEN...
  7. jamesepdavis

    SOLENOID RELIABILITY

    ALL HANDS, AFTER TWO ANNEALING PROCESSES, FINALLY GOT SOFT PARTS. RE-ASSEMBLED AND TESTED. FAILED IN 10 HOURS, SO WAS A WASTED MONTH. TODAY, FINALY GOT TO TALK TO METALURGIST AT CARPENTER. HE SAYS THAT IRON CORE PRODUCTS LOSE THEIR PROPERTIES WITH AGE. IF YOU HAVE A SOLENOID VALVE THAT'S...
  8. jamesepdavis

    SOLENOID RELIABILITY

    israelkk: SORRY, I'M STILL TRYING TO FIGURE OUT THIS THREAD STUFF. DOESN'T SEEM TO WORK FROM MY SECOND COMPUTER. ANSWERS TO YOUR GOOD QUESTIONS: 1. WHEN PLACED IN THE TESTSTAND IT'S PRELOADED 5 POUNDS. IT THEN ACTUATES .20" TO 10 POUNDS. SINCE WHEN "NEW" IT HAS A 55 POUND PULL AT .032", IT...
  9. jamesepdavis

    SOLENOID RELIABILITY

    ukpete, YOUR EXTRA COILS IDEA MAY BE AN EASY WAY TO CONFIRM THAT THE MAIN COIL IS ACTUALLY PULSING A FIELD. WILL TRY. JUST BECAUSE WE SEE AN AMP PULSE ON THE SCOPE, DOESN'T MEAN THE COIL IS ACTUALLY CREATING A FIELD. TEMPERATURE IS TRACKED BY THERMOCOUPLES AND RESISTANCE RATIO. COIL IS...
  10. jamesepdavis

    SOLENOID RELIABILITY

    BY USING ROTERS I DESIGNED A SOLENOID WITH CENTER PLUNGER AND OUTSIDE SHELL TO COMPLETE THE MAGNETIC CIRCUIT. THIS SOLENOID GETS 3 AMP PULSE AT 25 HZ. IT PRODUCES 50 POUNDS FORCE. IT'S AN ELECTRIC HAMMER. IT'S CONSTRUCTED FROM CMI-C IRON AND HAS A COOLING FAN TO CONTROL THE TEMPERATURE. SO...
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