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  1. brents

    size of bolts in a hydraulic cylinder

    thanks for the replies... i scrapped the 1/4-20 bolt idea, and I took the advice of going to 5/16-18 screws instead.. i tested the cylinder and it blew the seal at 8000 psi.. the seal was fine, the problem was the wall thickness where the bolts were..it blew the wall out everywhere the screws...
  2. brents

    size of bolts in a hydraulic cylinder

    hello, i have an aluminum cylinder with an aluminum flange screwed into the end with (8) 1/4-20 bolts with a thread engagement of .375" for each bolt... the bore of the cylinder is 2.625" and the input pressure will be 10,000 psi.. my question is: are the 1/4-20 tapped holes in the 6061 alum...
  3. brents

    heat treating 17-4 ph

    Hello, Does anyone know the tempering temperature to heat treat 17-4 ph stainless to 50+ Rc? I know this is really hard, but water is going through it at about 15,000 psi.. any help would be appreciated, thanks, brent
  4. brents

    heat treating books

    Hello all, I am in process of buying some fairly small heat treat furnaces.. I do mostly 4140 and 4130 steel, and some 17-4 ph stainless.. I have been looking on the web for some books..there a a lot of different books, and I just want to know if anyone knows of a great book(s) that I can...
  5. brents

    stainless steel finishing

    thanks everyone, I sure appreciate the input.. I understand now about trying to PREVENT the discoloration..I will request that next time.. But for now, I have a lot of parts allready done and discolored... I am sending some parts to different manufacturers of equipment so they can help me...
  6. brents

    stainless steel finishing

    Hello all, I have some parts that are made from 17-4 ph stainless..these parts are heat treated to h900 condition.. after heat treat, the parts are discolored.. I am needing to bring the "shiny" color back into the part because the customer likes the look.. I do not have time to hand polish...
  7. brents

    jaws of life

    Hello all, This question is out of curiosity more than anything.. just curious on what material the blades are made from on tools like the jaws of life.. looks like it would have to be a tool steel..but i guess it could be a high nickel grade alloy steel that perhaps could be carburized for...
  8. brents

    fiberglass tubing

    Hello all, I am looking for a non-conductive fiberglass tube. this tube needs to be approx. 7/16" OD by 5/16" ID..and it needs to be able to withstand 2000 psi of hydraulic oil.. I have been looking everywhere locally and no one carries this stuff.. any help would be appreciated.. thanks, brent
  9. brents

    hydraulic motor gears

    Hello all, I am trying to design a hydraulic motor. I am not very experienced in this so here is my question. I have seen the gears in some hydraulic motors, and they seem to be a "spur type" gear configuration, but they seem a little different than a typical spur gear.. I have been all over...
  10. brents

    treatment of 0-1 tool steel

    I have a print from japan that I am making parts for right now.. it is made from 0-1 tool steel It calls out for heat treat to 59-63 Rc..no problem, but it also calls out for a surface treatment MICr2.. I have been all over the internet and I can't figure out what MICr2 is.. Any help would...
  11. brents

    open/closed valve spool

    I posted this question awhile back in another forum. I am stumped! I currently manufacture hydraulic valves. which will operate a certain kind of equipment. I offer either open center valve, or closed center valve. How can I make One valve to be able to operate on both closed and open...
  12. brents

    cylcle testing..plc?

    Hi all, I do not have a good electrical background,hence the reason for my question.. I need to cycle test a unit to see if it will last over a certain amount of cycles (approx. 10,000 cycles).. Its basically a hydraulic cylinder that I need to run up to full pressure(10,000 psi) and then...
  13. brents

    closed& open center valves?

    Thanks for all of the replies..I guess I will continue offering 2 different models..Closed center, and open center.. thanks, Brent
  14. brents

    displacement of hydraulic gear motor?

    Thanks everyone for the replies... As soon as I get a free second, I'll calculate and see if the #'s are reasonably accurate.. I very much appreciate the advice.. thanks, Brent
  15. brents

    closed& open center valves?

    Ashereng: I apoligize about not being specific. the valve spool is hooked to a trigger..So if you don't press the trigger then the hydraulic equipment will not operate. but when you do press the trigger, then this will send the oil to the piece of equipment to operate. This valve is between...
  16. brents

    closed& open center valves?

    Maybe I am using the wrong terms..so I'll try better: I have a hydraulic valve with a valve spool in it..It is open center, which means that in the neutral position, the oil will flow from the "IN" port into the valve and then just go directly into the "out" port..so the oil is continuously...
  17. brents

    closed& open center valves?

    I know that closed center and open center valves will possibly use a different valve spool from each other. Is there any information I can obtain anywhere that could possibly explain how to make a valve both open center and closed center without having different valve spools? I would like to...
  18. brents

    displacement of hydraulic gear motor?

    Hopefully I can explain this... I have a hydraulic gear motor, which has two spur type gears that mesh with each other inside the housing. The dimensions are: O.D of each gear=.858" dia. thickness of gear=.625" # of teeth= 11 teeth per gear distance between centers is .750" flow= 7 gallons per...
  19. brents

    Pressure relief, need sound

    Bill, The 10,000 psi when relieved, will channel the oil back into a rubber bladder..this is a self-contained hydraulic unit..I can't have any external widgets that provide sound. I was hoping there were a way to internally make a distinct sound..I am still clueless.. thanks, brent
  20. brents

    Pressure relief, need sound

    I appreciate the response latexman, but I am really looking for a mechanical noise without any electrical whatsoever.. Maybe this is an impossible task..I have been staying awake at night trying to figure something out here... thanks latexman, brent

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