There was a discussion earlier about the capacity of your press. According to my calculations, with two 4.5 inch cylinders at 3000 psi, your press is rated at 47.7 US tons. This assumes everything is working at their very best. I'm no expert, but this press is one of the finest builds I have ever seen. You are very talented. Thank you for sharing! Jerry
Finally, a video author that realizes his viewership is global and states both metric and sae measurements. Your english is fine. Never apologize for multi-language skills. Love your press. You put some details on that thing that most home built tools never have like the upper and lower stops etc. Keep up the good work.
I haven't hammered a nail in the lasts 10 year, but I can say that @Torbjörn Åhman is an isnpiration to me to change this. And it's going to be soon!!!
Easily one of the coolest hydraulic presses I've ever seen. I appreciate the attention to detail and the engineering. You overcame some challenges in an interesting and creative way. Best wishes in all your endeavors!
I just don't understand why people would give a video like this a thumbs down. The man did a beautiful job of building this thing and explaining it, and showing it and yet there's people out there that just can't seem to appreciate any of it. My theory is they either have no idea how to do this. They don't know what it is that they're looking at, or they have failed miserably at trying to do this! Great job!
very nice Karl. please ntell us where you sourced the cylinders and hydraulic pump , I mainly need the specifications so I purchase the correct parts for my own press. Thank you
Don't apologize for your English! You speak more clearly than some Americans. As someone who has only picked up scraps of other languages, I am totally impressed by your command of English. I've watched two of your videos and not had a moment when I had any difficultly understanding everything you said. Plus, your designs are brilliant!
Thank you. I hope I will get more fluent speaking, in the future. At this point, its like three takes to say one sentence. I got hours of footage where I stop in the middle of the sentence :)
Hey bro your English is fine....I understood everything you said. You explained everything very well, and your design skills are dope!!! One of the nicest homebuilt presses I've ever seen. I definitely am going to use some of the features you designed into your press when I eventually have all the material collected to build mine :) Thanks for the vids...hopefully we will see many more from you in the future!
Fantastic! Very well thought out and executed. It was a real pleasure to have you show your very functional design. I gained some good information from this. Thanks for being generous in sharing your knowledge.
Nice build, if I may suggest, I would make it so you can have it run automatic also. Have top and bottom travel limits set as you are planning to build them and it cycles from down and up over and over again. You will use it a lot for long pieces of steel to bring them down to size. Put a tape measure on the column too with a marker on the cross beam, that way you have a quick reference for setting the bottom limit.
Have you made plans for this press? I would be interested in some nice drawings as my friend is a machinist and he's well versed with hydraulics. We are looking for pictures, drawing and specs.
Super machine. I think I like how quietly it runs as much as anything else. Some of these presses are obnoxiously loud. How did you get yours so quiet?
This may break your heart, but I the audio is actually edited, so the viewers ears wont bleed. The pres is very noisy when started, when it heats up a little, it is just bearable without ear protection. But I use earplugs almost all day anyway. I wish It was quieter.
Do you have plans or blueprints a available anywhere. This is by far the best build I've seen and I'd like to start researching the nessasary skills to make withing the next year
Thanks. I didn't use any plans. Its all about a piston and pump you can get at then you go from there. You should also check local scrapyards to see if they have some nice beams for sale.
I have watched many videos on home built presses but yours is by far the best thought out and built of the lot. Well done. You should be very proud. If you make these plans available for saIe I will be the first one to purchase them.
Your design is by far one of the best designs that I have seen on UA-cam I’ve looked at single piston presses and dual piston presses and yours it is the most non-complex design that I’ve come across this is truly a great press and I’ve watched your video probably about 10 maybe 15 times and I’m probably gonna keep watching it do you have plans that you can sell or maybe send to an email how much are you asking for the plans.
Thanks. Rams and pump were bought from local craigslist, so I dont know. But the rams, similar size can be found on various machinery like diggers and cranes. Motor runs on 400v 3phase (European standard)
Hi Karl, your homemade forging press is awesome! Do you have a BOM that you could share regarding the components that you used to build this machine? I am interested to build one too if you could share some tips. Thanks!
Hi, thank you. Unfortunately there is no BOM to this press. I just used whatever I had lying around. I suggest checking your local scrap yard to see what steel is available there.
Great job.. Can you give me some specs on the electric motor. I have a 34 ton gas log splitter that would like to convert. Ive tried several motors but no success. Do u know the rpms and motor size. Any suggestions. Thank you
Hi - Cool Build. I'm looking to build a forging press myself but know nothing about hydraulics. The Ram, the motor, the pump??? Do you know of any resources where I can find out the basic information sufficient for me to put a plan together??
There are some facebook groups focusing on building a forging presses. You are looking for some 5kw (7hp) motor with pump. That can pump 220BAR (3000psi) at about 30liters /minute. And piston with 150mm bore (6inch). Use this website to do the math: www.tss.trelleborg.com/apps/hydraulic_cylinder/ There is a guy repairing hydraulics in every bigger town in the world. So maybe find one in your area and start there.
Karl, do NOT apologize for your english. It's easier to understand than some Americans and some Brits and they were born to it. If your up rites, channel iron, were turned in instead of out, could you have used it to guide the ram? Maybe not, no way to get it out for service should you need to in the future. It's a thought. Great job. I'll keep in mind the multiple rams for mine. Happy squishing and squashing.
That "1st Press" of the square tubing is really a good shape! - Impossible to reproduce any other way. So the question remains, Is it better to power hammer or forge press a hunk of steel? They are so different in their upsetting - does it make a difference in the metallurgy?
Great press build, quick change die holders, large control lever with with foot control, tool stops up and down , lots of great ideas , nice fabrication work. Your bench vise? , looks modified to open wider. Thanks for sharing the press build , keep up the good work.
Thank you. I believe that having strong press is just a half of the story. It is all the details and features that makes it good machine to work with. The bench vise is just stock, I think. Unfortunately there are no markings on it, so I cant compare it to the others of this type.
Well made machine! Thank you for sharing. Your English is great. Slight accent but from what I remember not a single mistake. Greetings from Boston USA.
mostly because when you have to use a language that isnt native to you, you put a whole lot more effort into it, since you know you need to be extra clear.
Sir very nice and usefull mechine good if it is possible please send the diagram illustrating with measurements (size) my mai I'd is. Prb8848@gmail.com . I will try it for my work thankyou
Nice looking press, i did notice a small amount of inward deflection of your upright beams and lower die mount,, will you be doing any extra bracing, ??
@@KarlMetalworks With multiple cylinders, you can use a pressure balancer to even the descent when your load is off center. But it makes sense for you not to use one in this configuration since your load is centered and your ram is well guided on both sides. Anyway, big thumbs up!
Excellent! Nicely done! Very well thought out! Well done! Very nice forging press! Your English is excellent! I had no problem understanding you at all!
Your English is great so don't feel pressured. The following is from a Canadian point of view of English, western Canadian to be more precise. Commonly the liquid used for machines like your press is referred to as hydraulic "fluid" so you had it right from where I'm listening. Oil is reserved for usage where lubricating or bearing load support is it's primary purpose. Brake liquid wet stuff gets the "fluid" designation too. English is full of rules to be broken and you'll constantly come across inconsistencies at an inconsistent rate. Nice press too.
Hi great build ! What were the specs of the rams you used and does doubling the rams equal double the pressure ? I would think so but have been caught out before with assumptions lol Cylinders are so expensive here in the uk.. a 5” bore 2” piston here is £1000!! Crazy money I’m now thinking of a 2 ram design as it may be cheaper as the rams would be smaller and easier to source new or second hand
Great Design! Beautiful Execution and Fabrication!! Very well thought out!! Best, more thorough build - covering all bases I have seen!! liked !! Subbed !!
That’s awesome man, and don’t apologize for your English, you have better English then some of us Oklahoma folks lol. Have you thought about wiring in limit switches? They are easy to install. Kinda like on my milling machine. I can kick my auto feed in and when it hits the limit switch it’ll kill the power to that direction but will allow you to auto feed in the other direction. Nice work. Love the design
Thanks. Electronic limit switches is probably much better way to go. But I am absolute rubbish when it comes to electronic and viring. I made mechanical ones, in other video. And it just does the job just fine for what I do.
very nice press. good job! How happy are you with this speed of the ram?If im not mistaken its about 24mm/s Im building my own press, and im still deciding on how fast should i make it
Amazing!! How much did you spend on this? How much did it cost on average?? How long did it take for you to make it?? I’m surprised at how well it is made.
You can buy an automatic return chest valve. They sell them for log splitters. Push the handle up and the ram fully returns when it senses some pressure it stops. Google it
Hi Karl ! Super press! And a super video! Are you open to doing some consulting if I take on building a press close to yours? It will be my second press to build, but first with a hydraulic pump. And heck... no need to apologize for your English. It's super! I wish my Russian was that good! ))) Every year it gets a bit better!
nice job, well done! but what is left unclear for me - how upper part of the press is made (from what parts, what is the thikness of metal, how does cylinders attached to the frame etc.) Hope, you'll answer)
If a person were to build a hydraulic press where can a person buy the hydraulic pistons and does the company that sells the hydraulic pistons to Ireland 🇮🇪 ? And what price would the hydraulic pistons be?
Good job!! I would like to make a forging press like yours, but I am very knowledgeable about hydraulic, could you tell me the components that you have used? thank you!
There was a discussion earlier about the capacity of your press. According to my calculations, with two 4.5 inch cylinders at 3000 psi, your press is rated at 47.7 US tons. This assumes everything is working at their very best. I'm no expert, but this press is one of the finest builds I have ever seen. You are very talented. Thank you for sharing! Jerry
Finally, a video author that realizes his viewership is global and states both metric and sae measurements. Your english is fine. Never apologize for multi-language skills.
Love your press. You put some details on that thing that most home built tools never have like the upper and lower stops etc. Keep up the good work.
you should not apologize for your English speaking skills. I live in the US, you speak better than some who live here.
Wow! A super nicely built machine! It's a beast. Squashing that square tubing was über cool !
Thanks Torbjörn, your channel is big inspiration for me. I heard you can also squash square tubing just like that on big powerhammer. Give it a go :)
@@KarlMetalworks Thanks, I'll try that! :) :)
That was so cool to watch the tube fold on both axis like that.
I haven't hammered a nail in the lasts 10 year, but I can say that @Torbjörn Åhman is an isnpiration to me to change this. And it's going to be soon!!!
That's the best set of dies I've seen on a press. And I love the full extend and retract protection! Never seen that anywhere else.
Great work!
Easily one of the coolest hydraulic presses I've ever seen. I appreciate the attention to detail and the engineering. You overcame some challenges in an interesting and creative way. Best wishes in all your endeavors!
Definitely one of the most impressive press builds I've seen. be stealing a few of your ideas when I build mine.
Great build... how do you know the travel distance without breaking the punch and dies
I just don't understand why people would give a video like this a thumbs down.
The man did a beautiful job of building this thing and explaining it, and showing it and yet there's people out there that just can't seem to appreciate any of it.
My theory is they either have no idea how to do this. They don't know what it is that they're looking at, or they have failed miserably at trying to do this! Great job!
very nice Karl.
please ntell us where you sourced the cylinders and hydraulic pump , I mainly need the specifications so I purchase the correct parts for my own press. Thank you
I got it from a local (Czech republic) craigslist. Its 7hp 3phase motor, it pumps about 30liters/second. And at about 220BAR max.
@@KarlMetalworks Thank you
Don't apologize for your English! You speak more clearly than some Americans. As someone who has only picked up scraps of other languages, I am totally impressed by your command of English. I've watched two of your videos and not had a moment when I had any difficultly understanding everything you said. Plus, your designs are brilliant!
Thank you. I hope I will get more fluent speaking, in the future. At this point, its like three takes to say one sentence. I got hours of footage where I stop in the middle of the sentence :)
@@KarlMetalworks May I ask where you are located?
@@genesmith487 Czech Republic / Europe
Great work. I'm hoping to build one one-day so people like you who share information are awesome. Thank you.
Hey bro your English is fine....I understood everything you said. You explained everything very well, and your design skills are dope!!! One of the nicest homebuilt presses I've ever seen. I definitely am going to use some of the features you designed into your press when I eventually have all the material collected to build mine :) Thanks for the vids...hopefully we will see many more from you in the future!
Fantastic! Very well thought out and executed. It was a real pleasure to have you show your very functional design. I gained some good information from this. Thanks for being generous in sharing your knowledge.
Thank you. Comments like yours are the reason to share the knowledge. Le me know, how your press turns out.
Nice build, if I may suggest, I would make it so you can have it run automatic also. Have top and bottom travel limits set as you are planning to build them and it cycles from down and up over and over again. You will use it a lot for long pieces of steel to bring them down to size.
Put a tape measure on the column too with a marker on the cross beam, that way you have a quick reference for setting the bottom limit.
Have you made plans for this press? I would be interested in some nice drawings as my friend is a machinist and he's well versed with hydraulics. We are looking for pictures, drawing and specs.
Super machine. I think I like how quietly it runs as much as anything else. Some of these presses are obnoxiously loud. How did you get yours so quiet?
This may break your heart, but I the audio is actually edited, so the viewers ears wont bleed. The pres is very noisy when started, when it heats up a little, it is just bearable without ear protection. But I use earplugs almost all day anyway. I wish It was quieter.
Nicely done! Im planning to start my press soon, and will be using some of your designs. Thank you for sharing it!
Building one right now and going to steal some of your solutions regarding the dies. Mine is inverted though and only 1700mm high. Thanks for sharing.
Do you have plans or blueprints a available anywhere. This is by far the best build I've seen and I'd like to start researching the nessasary skills to make withing the next year
Thanks. I didn't use any plans. Its all about a piston and pump you can get at then you go from there. You should also check local scrapyards to see if they have some nice beams for sale.
I have watched many videos on home built presses but yours is by far the best thought out and built of the lot. Well done. You should be very proud. If you make these plans available for saIe I will be the first one to purchase them.
Thanks. There are no plans, just a bunch of leftover material welded together.
Your design is by far one of the best designs that I have seen on UA-cam I’ve looked at single piston presses and dual piston presses and yours it is the most non-complex design that I’ve come across this is truly a great press and I’ve watched your video probably about 10 maybe 15 times and I’m probably gonna keep watching it do you have plans that you can sell or maybe send to an email how much are you asking for the plans.
Thank you, There are no plan at all, i just welded stuff i had and designed it all on the go.
What an amazing machine. What did the rams and pump come off of before they became a press? And does the electric motor run on 220v or 440v 3 phase?
Thanks. Rams and pump were bought from local craigslist, so I dont know. But the rams, similar size can be found on various machinery like diggers and cranes. Motor runs on 400v 3phase (European standard)
Best build on UA-cam!!!
Hi Karl, your homemade forging press is awesome! Do you have a BOM that you could share regarding the components that you used to build this machine? I am interested to build one too if you could share some tips. Thanks!
Hi, thank you. Unfortunately there is no BOM to this press. I just used whatever I had lying around. I suggest checking your local scrap yard to see what steel is available there.
Great job.. Can you give me some specs on the electric motor. I have a 34 ton gas log splitter that would like to convert. Ive tried several motors but no success. Do u know the rpms and motor size. Any suggestions. Thank you
It is a 5,5Kw 1500rpm. 3phase 400V (european standard)
@@KarlMetalworks thank you sir
That is a cool press 👍 I'm currently designing one myself and really appreciate you sharing your knowledge with us.
Nice build, and so well thought out and presented.
Thanks, I'm trying my best.
Excellent build and Video. I like the points you made and will try to use them when i build my own press. Your English is most excellent sir :)
Hi - Cool Build. I'm looking to build a forging press myself but know nothing about hydraulics. The Ram, the motor, the pump??? Do you know of any resources where I can find out the basic information sufficient for me to put a plan together??
There are some facebook groups focusing on building a forging presses. You are looking for some 5kw (7hp) motor with pump. That can pump 220BAR (3000psi) at about 30liters /minute. And piston with 150mm bore (6inch). Use this website to do the math: www.tss.trelleborg.com/apps/hydraulic_cylinder/ There is a guy repairing hydraulics in every bigger town in the world. So maybe find one in your area and start there.
You did a fantastic job! Me and a friend are hoping to build one soon.
awesome build Question, How thick are the C channels on the sides and the top plate?
Thanks, they are about 10mm
The "L" shaped stuff is called "angle iron". Thanks for sharing.
Karl, do NOT apologize for your english. It's easier to understand than some Americans and some Brits and they were born to it. If your up rites, channel iron, were turned in instead of out, could you have used it to guide the ram? Maybe not, no way to get it out for service should you need to in the future. It's a thought. Great job. I'll keep in mind the multiple rams for mine. Happy squishing and squashing.
That "1st Press" of the square tubing is really a good shape! - Impossible to reproduce any other way.
So the question remains, Is it better to power hammer or forge press a hunk of steel?
They are so different in their upsetting - does it make a difference in the metallurgy?
Great press build, quick change die holders,
large control lever with with foot control, tool stops up and down ,
lots of great ideas , nice fabrication work. Your bench vise? , looks modified to open wider. Thanks for sharing the press build , keep up the good work.
Thank you. I believe that having strong press is just a half of the story. It is all the details and features that makes it good machine to work with. The bench vise is just stock, I think. Unfortunately there are no markings on it, so I cant compare it to the others of this type.
This is a brilliant built. I like the changeable parts especially. You rock man!
Well made machine! Thank you for sharing. Your English is great. Slight accent but from what I remember not a single mistake. Greetings from Boston USA.
Your version of the Apocalypse Now quote is great
Impressive build and equipment! Im on the verge of building one myself. I will def use yours a lot as reference. Thanks for sharing.. :)
That is a brilliant design, well done!
Thanks for sharing. Great design and your english is great. Very handy machine.
very nice! what size are the cylinders? how many gallons per minute (gpm) does the pump do? many thanks for this video
Bore is 115mm (4.5Inches) stroke is 30cm (12Inch). Pump does 30L/min (8gpm) I think.
Parádní kousek, pekna prace 👍 alespon skica jak takovy hydraulicky lis postavit by jste prosim nemel? Dekuji
Great video Karl, thanks a lot. It's gonna help and inspire my own build. Thanx!
Why is it that the only people who say "Sorry about my English" speak better English than me? Also, NICE WORK. :D
I will take that compliment, thanks. I hope you are Harvard English language teacher or something :)
@@KarlMetalworks Nope, just a native speaker.
mostly because when you have to use a language that isnt native to you, you put a whole lot more effort into it, since you know you need to be extra clear.
They have that book English
Sir very nice and usefull mechine good if it is possible please send the diagram illustrating with measurements (size) my mai I'd is. Prb8848@gmail.com . I will try it for my work thankyou
Great work. Which is the thickest steel, you can cut with a cutter blade?
Thanks, I haven't tried it, it is one of more dangerous things to do with a press. Also, I have saw just next to the press.
Outstanding design and performance. I award you A+!
Those physical interlocks are really cool.
Wow! What a fantastic press, excellent design and implementation. I subscribed based on just this one video.
Nice looking press, i did notice a small amount of inward deflection of your upright beams and lower die mount,, will you be doing any extra bracing, ??
Thanks. There is some deflection, but no deformation. So it is just fine.
That’s awesome, what did it cost to make, because I want one.
This is really cool! Very impressive for the homemade machine! Nicely done!
Well done! That is a great press.
Engineering seems spot on, very nice build and effective design. Your dies swapping demo was impressive. Do you use some kind of pressure balancer?
Thanks, no pressure balancer on the machine. Not sure what a pressure balancer do. So I think, I don't need it :)
@@KarlMetalworks With multiple cylinders, you can use a pressure balancer to even the descent when your load is off center. But it makes sense for you not to use one in this configuration since your load is centered and your ram is well guided on both sides.
Anyway, big thumbs up!
fantastic mate, well explained and your english is fine, you should be proud of yourself.
Excellent! Nicely done! Very well thought out! Well done! Very nice forging press! Your English is excellent! I had no problem understanding you at all!
Thks lot for the detail. I plan to build one but with one piston.
Your English is great so don't feel pressured. The following is from a Canadian point of view of English, western Canadian to be more precise. Commonly the liquid used for machines like your press is referred to as hydraulic "fluid" so you had it right from where I'm listening. Oil is reserved for usage where lubricating or bearing load support is it's primary purpose. Brake liquid wet stuff gets the "fluid" designation too. English is full of rules to be broken and you'll constantly come across inconsistencies at an inconsistent rate. Nice press too.
Hi great build ! What were the specs of the rams you used and does doubling the rams equal double the pressure ? I would think so but have been caught out before with assumptions lol
Cylinders are so expensive here in the uk.. a 5” bore 2” piston here is £1000!! Crazy money I’m now thinking of a 2 ram design as it may be cheaper as the rams would be smaller and easier to source new or second hand
Great Design! Beautiful Execution and Fabrication!! Very well thought out!! Best, more thorough build - covering all bases I have seen!! liked !! Subbed !!
That is a great press. No need to apologise about your English young man. Top respect to you!
That’s awesome man, and don’t apologize for your English, you have better English then some of us Oklahoma folks lol.
Have you thought about wiring in limit switches? They are easy to install. Kinda like on my milling machine. I can kick my auto feed in and when it hits the limit switch it’ll kill the power to that direction but will allow you to auto feed in the other direction.
Nice work. Love the design
Thanks. Electronic limit switches is probably much better way to go. But I am absolute rubbish when it comes to electronic and viring. I made mechanical ones, in other video. And it just does the job just fine for what I do.
Very good press, thanks for sharing! I’m curious about motor and pump, can you tell me how many hp and what’s the pumps flow?
very nice press, how much did it cost to build roughly?
Very Awesome Build... & Your English is really good! Thanks for sharing this video. I'm subscribing.
Awesome build bro.love the press
First two cylinder I have seen.... really impressive
very nice press. good job!
How happy are you with this speed of the ram?If im not mistaken its about 24mm/s
Im building my own press, and im still deciding on how fast should i make it
Thanks, Im totally happy with the speed of this one.
Nice job. I want one myself
Very cool bro about how much did it cost in
materials ?
“I love the smell of hydraulic fluid in the morning. Smells like pressure”
is there any way you could get some plans for this so i can build it
Wow Sir, you've made a brillant job here, I'm astonished with its power!!!
Very very clear. Thank you. Wishing you all the best.
SUPER WELL DONE!... This is super helpful and inspiring.
Ahoj, mohl bych poprosit o info ohledne čerpadla, kolik litru za minutu dává a jaka je priblizna rychlost posuvu pistnice za vterinu?Dobrá prace:).
You speak English better then most of my neighbors and they where born in the USA lol
Oh and excellent job sir
Amazing!!
How much did you spend on this? How much did it cost on average??
How long did it take for you to make it??
I’m surprised at how well it is made.
That is all that counts as long as you are hsppy, sometimes mine will get out of control because of its speed
Its easy to get distracted for a second, ans squash your workpiece to pancake :)
Amazing build! Congrats!
The guy that disliked this probably can't make an ice cube.
We should raise a campaign to find out that guy before he suicide!
I actually disliked and I'm a part time blacksmith so I think I can make an ice cube
RANDOM RICH being a blacksmith you could burn an ice cube at best.
Amazing Karl. Thank you for sharing. Your English is excellent.
Press is beautiful, English is good, No sweat!!
i love your design it's so quiet well made and versital , nice shop by the way. but GREAT JOB!!!!!
You can buy an automatic return chest valve. They sell them for log splitters. Push the handle up and the ram fully returns when it senses some pressure it stops. Google it
Hi Karl ! Super press! And a super video! Are you open to doing some consulting if I take on building a press close to yours? It will be my second press to build, but first with a hydraulic pump. And heck... no need to apologize for your English. It's super! I wish my Russian was that good! ))) Every year it gets a bit better!
nice job, well done! but what is left unclear for me - how upper part of the press is made (from what parts, what is the thikness of metal, how does cylinders attached to the frame etc.) Hope, you'll answer)
Amazing machine and your English is better then mine. I have broken American English. Proper English is over in Britian. Keep up the great work
Wow, you are very smart in building it.
that is one gorgeous machine, i am planning to make one for myself but it wont be for in the near future.
Very good video! Very nice press. It’s very similar to the press I built for my blacksmith shop.
If a person were to build a hydraulic press where can a person buy the hydraulic pistons and does the company that sells the hydraulic pistons to Ireland 🇮🇪 ? And what price would the hydraulic pistons be?
Try a craigslist in your location or someone who repairs heavy machinery in your area.
very inovative design ,great !
Well done mate . Well done
Zór 👍 menga sizni bu qurulmangiz juda yoqti.
Sir bólmasa qancha mablağ kerak shundayni yasashga aytsangiz.🇺🇿 Elyor.
Good job!! I would like to make a forging press like yours, but I am very knowledgeable about hydraulic, could you tell me the components that you have used? thank you!
Superb stuff, you've put a lot of thought into that.
Weakness to overkill. Love your style dude.
Hello Karl, I had a question. What is the pump rated at for gallons per minute?