Adding pressure gauge to a bottle jack.
ฝัง
- เผยแพร่เมื่อ 26 พ.ย. 2011
- I have wanted to do this for a while. Having a gauge on this jack lets me know how much weight it is lifting or when in the press, how much force it is applying. I used a 5000psi hydro gauge which will measure force up to 6100lbs. A 10,000 psi gauge would have been better.
- ยานยนต์และพาหนะ
Its a wonderful and practical project. You have taken basic engineering principals and put it to use in the workshop by this simple modification to a jack. At time we need to know the weight of a machine or build and with this device we can do that.
Thumbs up!!
Thank you for explaining everything. This video actually made sense. Now I can finally add a gauge to my jack. I think I’ll do it to my floor jack just for fun.
thanks for all the info i got about 3 jacks that need a going though perfect timing love the upside down tip
Outstanding information sir, I am going to implement your modification to some Harbor Freight jacks, probably the 4,000 lbs. size. I need to test some building panels, thank you for the detailed instructions, outstanding!
Great video! Very informative. Thanks so much!
Very nice!, Great advice, I just rebuilt one of my Hydraulic jacks, It works great now!
Good Vid :)
About the max pressure/which pressure gauge to select to suit the ram
If the ram is 12Ton / 26455lb and the Ram is 1.245" OD next to the seal then 26455 / 1.217 (ram area) = 21738 PSI for the full 12Ton pressure, only needed if you wanted to max out the ram but a good reference/calculation
Also another useful mod is to turn the ram upside down, this is actually possible by placing a spring over the ball valve that the lever operates so that id does not leak pressure/it takes the weight of the ball valve, done this with both a 12Ton and 30Ton Ram 100% success, using an air over hydraulic bottle jack would be even better but I wasn't sure if they could be converted to work upside down or not, so I opted for a "close" 50mm pin spacing for the table, holes 125mm apart
10,000psi gauge is perfect for a 30Ton Bottle Jack with Ram around 70 to 76mm OD
Thanks for the info. I'll do it tomorrow.
Merci pour ces explications très claires !
Georges
Excellent presentation, thank you
thanks for the video, very helpful.
One point to consider: What is the maximum your jack can generate vs. what the maximum rating is for the fittings used. Not sure, but I think schedule 40 black malleable pipe 1 inch and below is 2000 psi. Bottom line is not to exceed this maximum working pressure rating.
Nice useful explanations bro.
"1.23 at least it's easy to remember"
Always look on the bright side, lol. Good job on the video
very well explained, the only thing is that I never disassemble the cylinder utbe from the base as it needs extra force so if you don't have the special tool needed, the risk is great you cause a deformation of the cylinder and leaks, I fabricated extension drill bits so the tube doesn't bother me when I need enlarge the intake and return holes to recieve a tube for inverting the jack
Very nice video and very well explained. Thanks for sharing.
Best Wishes n Blessings Keith
Good job!
EXCELLENT. WENT WHERE NO MAN HAD TREAD.
Thanks so much!!! Nice job
really nice, i guess im going to try to do the same
excellent bro
Measure cylinder bore for more accuracy. Great project
I guess you could put hash marks on the gauge glass with a sharpie or slivers of electric tape for each ton.
I got a 50t bottle jack I'd like to do this to. Now I know how.
The internal cylinder diameter (what you really need for your calculations) is slightly larger than the piston diameter, but is more difficult to measure precisely.
That was cool.
I plan to do something similar. I would have actually miked the ID of the cylinder rather than the bottom of the ram , but should still be pretty close. Another way to calculate area is just to take your diameter squared X.7854
Reverse the Jack (as you noted in the vid), drill the bottom and reverse the Jack in your press and the guage will stick out the top (where you want it)
I was looking for a way to make a jack for my STEM class so we could measure the final pounds that their bridges held. I think I'll just count the number of pumps of the jack. Thanks for the video.
Counting the number of pumps of the jack handle WILL NOT relate to the force being applied to the bridges. The number of pumps of the jack handle will relate to the distance that the jack ram travels, or the deflection applied to the bridges. Stiffer bridges (typically stiffer is stronger) will deflect less than flexible bridges at any given load level. The strongest bridges may in fact break with fewer pumps of the jack handle than the weaker, more flexible bridges.
Imagine a rubber bridge. It will deflect a great deal, but it won't carry much load.
This property of elastic materials is the essence of Hooke's law.
thanks very much. can i connect the gauge to the bottom of the jack if yes is there any caution to prepare for.
perfetto bravo.
@DeusMalleus Not sure but I know I am near their ratings, who can say what kind of redundancy they have. you can use special high pressure stuff. It is a little jack.
Il be doing this mod to my upgraded 4ton rosin press will truly make it one of the best portable presses know to man
Thank you!!!
thanks for the info need jack with pressure gauge
Yes I will use the proper hydraulic fittings and pipe. Its not cheap but, better safe.
Thanks dude.............
THANX
What would the pressure ratings be for the fittings?
Hi, really interesting video. Is it possible to have it so the pump is remote from the body? I have a m/bike lift which uses this type of jack but it is really difficult to use the handle in order to create the lift. I would like to re-locate the pump section where it would be more accessible.
Ideas appreciated.
Lester
If you could substitute a port-a-power piston and pump then yes you could.
Hello! Thanks for the video! Not many out there on this subject. I’m wondering if I can get a fitting that can attach a gauge to the release valve screw and still allow a way to open and close it? Will that work also? Instead if tapping another hole?
From the release valve screw, the oil is behind one or more check valves and/or seals so you won't get any pressure readings there. consider that if the oil pressure could be measured there, you'd lose most of your oil every time you opened that valve.
@@GFlCh and in the security valve ? some bottle jack incluye a ''do not adjust'' screw beside the release screw, if i do a replace of that security screw with a manometer you think is gonna work? sorry bout my english im from chile im speak spanish
How do you remove slotted tank nut as on a floor jack? Do you have good idea on making a socket for such a task?
Can you take a picture/video of it and show me. Not following the description.
You can find us on facebook under NelsonStudios.
Now I know to buy a jack with a gauge already in place
I like the idea of watching pressure go down as bearings install in a 'press fit'.
Why didn't you make a bottom plate, like a manifold, and simply port up from the bottom (then out the side)??? just throwin' it out there.
Is there no digital gauges available? Because so far, tire gauges have already digital versions like from Mountaincrest. Does this stuffs have recent innovations already?
I assume there are, but one that would operate in this pressure range might be too expensive. The one he used would be much less expensive, and he might have had it on hand.
Plus, a digital gauge would require power. Either by batteries that you have to occasionally replace or recharge, or by a power cord/power adapter and perhaps an outlet and power switch.
cakep ... salam atas ilmu nya
Using your measurement of 1.245 and your formula, after rounding, you should have gotten 1.22 instead of 1.23
Great tutorial. Thanks!
Pedantry makes the world go round.
From 1.245 how do you get 1.22 seems to me that it's closer to 1.23 if you round down....curious more than anything
So why does buying a hydraulic jack with one installed cost 10X more than one without, when its so easy to install one?
Hi, could you tell me where you bought your pressure gauge?
please tell me that's not a cast brass pipe elbow those things are only rated at 125PSI, and the forged ones at 1200psi
great dude.. i use it to pump a pcp air rifle..;-)
behind the yellow rope looks like someone is watching you
is there any text to this tutorial? great vids by the way. me and my friends going to try this because we could not afford the hydraulic pump with a pressure gauge
You could copy/paste the text from the auto-generated transcript. It would need some proofreading and minor corrections, but it's very close:
00:00 I like this I draw it press fine but I'd
00:03 very much like to know just how much
00:05 force I'm applying so what I plan to do
00:08 is install this 5000 psi hydraulic gauge
00:13 onto the jack and then once I calculate
00:15 the actual inside diameter of the piston
00:18 I can get a really good approximation of
00:20 how many pounds of force is being
00:23 exerted first step is to drain the jack
00:28 each jack is different but as you can
00:32 see normally they will have a oil fill
00:35 level it's that red one up here very
00:37 similar thing so first off I got to pull
00:41 that and drain it into a clean container
00:43 so that I can reuse it once you've
00:47 drained the fluid it's now time to get
00:49 the jack apart now unless you have a
00:51 welded jack one of the reasons why I'm
00:53 not using this red one is it's actually
00:55 a welded jack unless you have a welder
00:58 jack it'll come apart in two places
01:00 it'll come apart right here and will
01:02 come apart right here but they both
01:04 could be really really hard to get out
01:07 starting with a newer jack obviously
01:09 it's going to make this considerably
01:11 easier with the base and the vice big
01:15 pipe wrench big channel locks big
01:17 something go ahead and unscrew this once
01:20 you get this out the piston assembly
01:21 should lift out of it this is the
01:24 hydraulic fluid reservoir and that comes
01:27 off next now it took a very large pipe
01:32 wrench and quite a bit of force break it
01:36 loose but it came
01:45 this is the next piece of pipe that has
01:48 to unscrew this is the actual barrel for
01:53 the piston when you get that apart
01:55 you're going to want to carefully
01:56 measure the inside diameter so that you
01:59 know just how big it is it'll let you
02:01 calculate the surface area and figure
02:03 out what sort of formula you're going to
02:06 need to get your gauge accurate so next
02:09 pull that inside pin now we're down to
02:14 our key jack components okay so this is
02:18 the actual pump right here and the oil
02:21 comes up out of that hole right down in
02:24 there and that activates the piston and
02:29 the piston rides inside of here so when
02:37 you take it apart it's alright to put
02:41 marks on this shaft you put marks on
02:44 this shaft and it's ruined absolutely
02:46 ruined but this shaft unscrewing it and
02:49 it took even more force then crack on
02:51 the top did this is the actual piston
02:54 shaft this is what it slides up and down
02:57 in the base you have the seals none of
03:01 this needs to come apart though it all
03:02 does need to go into your solvent tank
03:04 to be cleaned up this part of the jack
03:09 is nothing more than a hydraulic
03:11 reservoir this is where the fluid rises
03:14 when the piston is down and then as you
03:16 pump the piston up that fluid drops if
03:20 you want to make a Jack that is
03:23 reversible that is that you can pump
03:26 while upside down that can be done can
03:29 be done very simply you need to tap into
03:31 this line here which is the suction line
03:34 when you tap into that line there and
03:36 you're going to put a nipple and you're
03:39 going to go the appropriate distance
03:41 down with a little piece of hose so that
03:44 when the jack is upside down then it can
03:47 still suck fluid because that's your
03:48 main problem next step really I got to
03:52 clean this up we have to pull the ball
03:54 return we have
03:55 to pull the pump assembly out and get
03:59 ready to do some drilling down in there
04:02 so now I've got all the check and ball
04:05 return belts pulled out of it and these
04:08 are different for every jack and you
04:10 just got to be careful and try to catch
04:12 what can come flying out of the hole if
04:15 you're not careful a lot of modern jacks
04:17 will have them behind the bleed valve
04:18 this one had them in the pocket there so
04:21 it had a small valve which is basically
04:25 a steel ball in a seat in there on top
04:28 of that it had a spring on top of that
04:30 it had the large ball and then it had a
04:34 rubber Cup and they all go together
04:40 inside something like this you're going
04:42 to have something very similar and if
04:44 you shoot it across the shop and you hit
04:46 a little bits and pieces fall behind the
04:47 corners you're gonna have to buy a new
04:50 jack so be careful so now we're ready
04:55 for the milling process so what's got to
04:57 be done is we've got to tap into the
05:00 center of this part here but if you
05:02 touch with your drill bit that edge or
05:05 any of these threads again the jack is
05:08 ruined so there's not a whole lot of
05:09 wiggle room in there we're going to find
05:12 a way to go in through the side here
05:18 reach it in the center and then drill
05:21 and tap this out for your gauge
05:27 take some careful measurements do some
05:29 careful planning make sure you get this
05:31 right the other opportunity is to go
05:34 straight to the bottom which isn't an
05:37 option in this press all right so the
05:41 milling is complete I didn't have a lot
05:43 of base thickness to work with here so I
05:45 had to be very precise I came down just
05:48 below the edge of that lip I went inside
05:51 with a larger hole big enough that I can
05:54 then tap it out for a quarter inch pipe
05:57 and then using a tiny drill bit I
06:00 actually made my incision it you know it
06:03 doesn't have to be a big hole it can be
06:06 hardly larger than a pin hole and the
06:08 gauge will still read pressure at about
06:11 1/8 inch hole plenty that's bigger than
06:13 the hole it's in the bottom of the gauge
06:14 anyways so this should work perfectly
06:16 now I just need to tap this and give the
06:20 whole thing a very thorough cleaning
06:22 because you get those metal filings in
06:24 there and it will shorten your life your
06:26 jacket all right basically the operation
06:28 is complete I've got my threads in there
06:30 I've taken the time to very carefully
06:33 clean everything somehow already got dog
06:36 hair right very carefully clean
06:37 everything now I just need to put it all
06:41 back together it can't be too clean take
06:44 your time make sure everything is
06:46 spotless because any dirt in there and
06:49 it'll just cause you nothing but
06:50 troubles remember before you assemble it
06:54 to take the time to measure the bottom
06:56 of piston and it's not this diameter
06:59 here it's the diameter at the very base
07:03 the fatter diameter so I know that this
07:05 is one point two four five and that's
07:11 that's the number I'll enter in for my
07:13 calculations to figure out exactly how
07:16 many pounds of force is being exerted
07:18 one point two four five
07:27 you
07:29 again if you measure this you'll be off
07:32 and you'll be off fairly substantially
07:34 so it needs to be the base here
07:39 reassemble the jack the way you took it
07:41 apart it's a good idea before you
07:44 reattach the piston here to put a little
07:47 oil on that seal
08:08 well none of this footage is ever gonna
08:10 be used you know how tight it was when
08:15 you took it apart it's got to be pretty
08:17 tight when you put it back together and
08:21 there it is
08:22 all complete I just need to refill the
08:26 bottle it might take some time and
08:28 effort to get that to properly bleed
08:30 remember this is hydraulic stuff so you
08:33 know there can be quite a bit of
08:34 pressure on it and water pipe might not
08:37 hold so you should look into do using
08:41 the proper stuff I'm gonna go ahead and
08:44 bleed this and then test it out I hope
08:47 you have good luck with your own Jack
08:49 thanks for watching all right so here it
08:52 is all bled up I had some difficulty
08:56 bleeding it and there's still some air
08:57 in there somewhere
08:59 the handles a little spongy with luck
09:01 it'll work itself out on its own but now
09:05 when I add the pressure we bring her up
09:11 so the gauge it's just pressing on a bar
09:14 right now but the gauge is at 2,000 and
09:17 if I want to know how much weight that
09:19 is I have to multiply by one point two
09:23 three so that's actually putting 2,400
09:26 pounds of actual measurable force on
09:30 that I wish my piston would have been a
09:34 nice round number one would have been
09:36 nice one and a half would have been okay
09:38 one point two three at least it's easy
09:41 to remember so again good luck with your
09:44 project I hope it all works out for you
Can you not make a dial around the outside of the gauge to give you the correct numbers for pressure so its easy to read ??
Sure, a little index card with the numbers written out taped to the back is a great idea.
Most of the jack works between 8000 to 10,000 psi
Presser gauag kaha milaga
Can you add an air compressor for quicker pumping?
Csaba Farkas No because air would make it spring. You could however start with an inexpensive air powered bottle jack jack from a company like Harbor Freight which when I think of it now is a dang good idea.
NelsonStudios Thanks for the very detailed tutorial. As for air over hydraulic, you can tap the fill plug and and use low pressure air (10-15 PSI) to raise the jack faster than pumping with hand. It won't be like a air hydraulic jack but it will extend the piston very rapidly until it gets to a place for actual pressure and then you continue with hand pumping. I've setup mine with 3-way air solenoid and a foot pedal and it works great.
Actually, on the air/ hydraulic jacks units, the air only supplies the power to operates a small hydraulic pump in place of the manual pumping motion that you normally provide
To get the surface area of the ram use oil displacement to measure it, attach a graduated syringe body to the outlet you are going to fit the gauge to via a tube and bleed out the air between, locate dial gauge to the top of the ram, stroke the ram exactly a specific distance on the dial gauge and note how much fluid entered the syringe graduations, if 1 CC of fluid enters the syringe over 1 CM ram stroke then the ram surface area is 1 square CM. Or for imperial convert 1 cubic inch to 16.3871 CC because syringes come in CC , and if 1 inch of stroke pushes 16.3871 CC of oil into the syringe then the ram surface area is 1 square inch. Use the value you end up with to convert the gauge reading to ram pressure.
ugh....or just measure the diameter of the ram, divide it by 2, square it, and multiply by Pi. (pi*radius^2)
You can pull it apart to do that, or just use oil displacement method and no need to take it apart.
He had to take the jack apart anyway but no need to measure the piston and no need to use the displacement method. No need to know the piston diameter at all. Just put a known weight on the jack and read the gauge to get the ratio of weight to PSI.
IMO not an accurate method unless you put a ton on it and that's not safe.
que buen video lastima que ese señor no able español oorque asi quedan algunos detalles sin entender por favor publiquelo en español pero eso si con caracter de hurgencia es desir lo nesesito ya gracias
Am I the only one here to add a gauge to my rosin press😂
How much need one done
Northern Hydraulics sells them already made.
So just adding the gauge to bleed valve wouldn't work. Hmmm? Crap
Can't you just use a pressure gauge?
This is what he used, a 5000psi pressure gauge. What other type of pressure gauge are you thinking of? Where would you attach it? Keep in mind that the gauge you use, and the fittings, are under the full pressure of the jack. If they can't handle that kind of pressure, the gauge and fittings will eventually (perhaps immediately) leak, fail, and break apart, perhaps violently.
Or you could just buy a tongue weight scale and all the figuring is done and their not that expensive.
WOuldn't be half as cool as building it yourself tho
Good instructor. But really don’t waste your time with this and wreck a good working jack. You can buy them new with the pressure guage built in.
why the calculation???
It is how to tell actual pounds the press is putting out. Pounds per square inch, you need to know how many square inches the piston is to figure total pounds unless your piston is exactly one square inch.
ha . why would you care? everything is measured in psi or bar (pressure) when it comes to hydraulics.
adam sorell You understand that this is in a press and it is often useful, sometimes required to know how many pounds of force you are exerting on an item?
when is it useful?
@@adamsorell4851 Any time you are pressing something it is useful. An arbitrary pressure reading doesn't tell you anything.