TJ Smith

Right kind of question. My pump is already rated at 16 gpm. what rpm does it need to turn to achieve that? Most sellers rate their pump at gpm  not at pump replacement per 1 revolution. Check Northern Tool

At what rpm are hyd pumps rated?

1f your pump is rated at 16 gpm  at what rpm is that rated at?  1725 or 3450

Looks like the same cyl I Have

26 inches long almost 5 inches in Dia. with a 3 inch rod. I use a 16 gpm and has a good

speed.

Actually a new return line is what I needed. I used a clear reinforced line as everyone said no pressure in the return line. Re[placed the return line and everything works fine.

Thank you all for your concern.

Take care

TJ Smith

Had a close one last Thurs.
While forge welding a billet for feather Damascus my press blew a return line.
There is not supposed to be any pressure in the return line, but let me tell you a 16 gal pump will spray hyd fluid about 10-15 feet..
The bad thing was the forge was to close and the spray from the leak went right into a 2000 degree plus forge. Instant huge fire. I was operating the press when it happened.
Worked fast shutting things down,the press,the forge,grab the fire extinguisher , spray the xxxc out of everything. Have you ever tried to cool down a 2000+ degree forge full of hyd fluid. Finally got the flames out and wheeled the forge outside.
No damage to anything except 1 light fixture. Need a new return line hose that will stand some pressure.
Mostly a lot of cleaning and probably some new paint. Ought to leave it as a reminder??
Thank God nobody got burned or hurt.
Lesson learned. Use pressure lines on the return also,Don't put your forge close to your press. Keep a fire extinguisher close.
Take care
(Lucky)
TJ Smith

Thanks CMS for a decent reply to my question.

More time was spent on my having a bad attitude then answering my question.

I have been making knives since 1992,have made 3 forges, 3 presses,1 heat treat oven, and several other time saving devices.

Thought maybe someone on a thread labeled  mills and such might not mind passing on a little info.

I am not a blacksmith,but have admired those who are.

I will aploigze for bothering those who are to busy to answer general question and will go to one of the other forums.

Thank you

TJ Smith

On 6/22/2017 at 3:35 PM, Frosty said:

Yeah. Buy a better mill and take a class or two.

Did you sharpen your cutters for steel. There is a significant difference in the edge angles for cutting copper alloys as compared to steel.

End mills are notorious for chattering if you aren't  using it correctly. How deep are the cuts? How fast are you feeding it and how fast is the cutter turning? Why are you using a mill?

Your question is so general it's unanswerable say I asked, "My car is running rough, what's wrong?"

Frosty The Lucky.

Frosty dumbest answers I have ever got.

Buy a new mill. DUH not gonna happen.

Didn't know I had to sharpen end mills for steel. Could have suggested that.

Why am I using a mill. TO make a guard slot. DUH.

If you can't give a decent answer xxxx up.Thanks Kozzy and gun doc for some answers that help.

I make knives.

Thank you TJ Smith

Thanks

In Have a small Grizzly mill. It does fine with small end mills in brass but tends to chatter with anything close to 1/4 inch. Anybody got some hint or tweaks to tune it up and stop the chatter?

Tj Smith

Knifemaker

Yeah looks just like mine. ()range that is0

My freind Dick and i built this . Took about a month. Dick is a excellent welder. We have made several random damascus and are working on some feather now.Love it.

TJ Smith

still no pics

No pics

i like to run a reducing flame on my forge to reduce scale.

I wouldn't call it soft or quiet. My forge sounds like a jet engine with flames coming out of both the back and front 3-4 inches.

After a few minutes of running I can get welding heat with 4 lbs of pressure. I don't think flares or mig tips are going to improve on that.

Enjoy the discussion

Take care TJ Smith

.

MY forge burner is a simple 8 inch piece of 1.25 black pipe. It is blown with a 65 cf fan. I don't have a nipple or small hole drilled anywhere for propane to enter. My burner is reduced in size from 2 inch to 1.25 inch and gas enters just before reduction. I have a gate valve to adjust air flow.

My forge will get to 2350 degrees.

 Why all the nipples and special flares? Do you really need them.

TJ Smith

What ever stay brite comes in I use the small package

Here is my way. Get a tight fit. Square the guard to the knife. Use a clamp of some kind to hold it in place. there are several made to do the job. Paint a little flux on the joint, holding the knife with point up so flux doesn't run down the blade. Put the tang with the point up in a vise and put a couple snippets of solder around the joint line. 2 1/8 inch long snippets usually work. I use stay brite solder and flux. Start applying heat from underneath as the flux starts to bubble hit the top with a little heat as the solder melts make sure it is connected to the knife steel and the guard. Take your sharpened wire and run it along the joint, the solder will follow along and cover the joint. Don't just pour on the heat, paint it on as needed like using a brush. should have a heat sink or wet towel about an inch above the guard.

Just enough heat to do the job works best . Most problems come from to much heat.

I use a propane torch with a auto ligh tip pretty small but works fine

Take Care TJ

I used 3x4 x1/4 inch tube for uprights with a bottom mounter cylinder. 4.5 inch used a 16 gpm pump. getting close to 20 tons and does a fine job at that speed.

With a 3 hp motor and a 11 gpm pump I don,t think you would be happy with the performance.

I built one. Made 2 harley chain knives on it and several random pattern Damascus knives with it.Just remember you have 20 tons of pressure.Gotta keep the work hot.

What the heck you can always use a new jack right?

Take Care

TJ Smith

I did make a 20 ton though just so you know Once your're hooked on damascus  you 've had it.

My press moves up. You don't have to lift the work let it ride up on the die and just lightly hold  the handle.

Mostly a matter of choice. Pressing up requires less head room. Like you don't need a 10 ft ceiling.

My anvil is set about eye level or a little lower and is very comfortable to work with.

Take care

TJ Smith

After looking at maybe a kazillion different set ups I placed my filter on the return line. After all it is a closed system.Maybe between the tank and the pump would be better.

I'll rethink that for a bit(2-3 years) before I move IT

Check out several working presses and build one.

Take Care

TJ Smith

I use a canister to enclose the chain, powder, and  steel. I think that chain would work, but not by itself there is to much open area between the links.. I use a thin wall square tube. Weld 1 end shut with a piece of scrap over it. Suspend the chain so it hangs straight down into the tube. Then pour 10 84 powder or 1095 powder into the can when full vibrate the can and refill with powder. Weld another scrap to close this end. First put some scrap paper inside to burn out oxygen. Weld on a handle and head for the forge. If this works let me know as I haven't tried it yet. Just a theory.

Merry Xmas

TJ Smith

Here is a couple I put together. Motorcycle chain,15n20 saw blade steel core, 1084 powder. What do you think?

 Take Care and Merry Xmas.

TJ Smith

Yeah know the feeling.

I have been working with a 20 ton air over bottle jack and it does work. I have made several knives with it but it is slow.

I am currently building a hydraulic press.

It looks like you have all the parts, but don't know what you'll end up with. Clean them up, find out what they'll do, Do the math. Calculate the pressure and speed. That will tell you if they will work or not.

There are lots of charts and tables you can axcess to get those numbers.

Take care

TJ

What does everybody use for hyd oil in their  press?

Thanks TJ

In looking for a motor for a press.I decided to go with a 5 hp 1725 rpm motor. Very hard to find.

if I took a 3hp x 3450 rpm motor and used a belt drive to get down to 1725 would that work?

What would that do to my HP?Tj Smith

In a hyd circuit for a press what reduces pressure for the return to reservoir?

Thank you TJ