Jack Evers

Try this:

http://www.erowid.org/archive/rhodium/chemistry/equipment/molarity.html

Through a gear system torgue times RPM is constant (neglecting friction). For my blower and I assume most are similar in speed ratios, the RPM increase from crank to blower is about 50 fold. With two equal gear increases this would be about 7 fold from the crank to the intermediate gear and another 7 fold from the intermediate gear to the fan (7 times 7 is almost 50). Going backwards, torque would increase that fast. If you put 30 ft pounds on the fan nut, it would have been about 200 foot pounds on the gear you bent.

I suspect the mfg built the gear on the assumption that input from the crank should not exceed perhaps 45 ft - pounds (30 pounds force on a 1-1/2 foot handle) or about 7 ft-lb on the intermediate gear. With high multiplication gears, it's risky to apply force backwards.

Yep! Branding irons are a one shot deal or if a second is ordered it will be a different size.

My shop anvil is blunt, I can use a bick, my truck anvil is often used for a center punch to mark left and right horseshoes One accident years ago when a teen age client over disciplined his horse and ran it into the anvil. He missed 4-H fair over it but deserved to miss it - horse didn't reserve the punctured rump.

Zinc melts at 787 degrees F. It does not form zinc oxide until around 1600 F. If you can even briefly touch the pipe you're likely OK, but err on the safe side.

Here's a link

http://periodictable.com/ZincSafety.html

It's a fraternity brand, for (if I remember correctly) Sigma Phi Epsilon. It's one of the "traditionally black" fraternities. If you're a football fan, you can sometimes see the brand at about bicep level on some of the players, especially with the jerseys that fit tight to the pads, and leave the upper arm exposed.

Here's some of mine - welding plus forgeing. The first is my personal brand. This one is for horses, applied quickly. My cow brand is about twice as big to prevent heat build up. Second is one that was ordered and never picked up. I think it was intended for human branding and I asked too many questions. They didn't come back and all I had was a cell phone number they wouldn't answer. The third (W/O iron) was a gift to friends. It will never be used on an animal.

Just in case some are wondering what in blazes the Railroad Commission has to do with propane, early problems in Texas with hydrocarbon fuels often involved transportation of such and in 1917, the fuels area was given to the RR commission. In 1930 or so the East Texas Oil Field was discovered and a small agency became quite powerful. Today the Feds control RRs but the commission has never changed it's name.

I'd guess "Multi Products" Japanese in the 70's.

Here's a link to one for sale.

http://www.worthpoint.com/worthopedia/135-lb-multi-products-anvil-farrier-blacksmith

Link says manufactures from 1955 to 1985

Having a regulator on that propane line is a *must* IMNSHO makes tuning the forge a whole lot easier

I could also add that drilling line is like a mountain climbers rope. If it fails in service, someone is likely to die. It is therefore retired well before it is worn out.

There are two main areas of stress fatigue in a drilling line First is the combined stress of bending around the pulleys as the load is picked up and the second is the lap points on the pickup spool. The drilling contractor addresses these with a technique of "slip and cut". Every so often (based on ton miles of pickup) he will slip a bit of cable from the storage spool and move the pickup points, then every so often he will cut a part of the line to the spool and move the lap points. This means the stress is spread out, but as others have said, heating and reheating makes the high stress areas moot. Use and enjoy your cable (wire rope). Drilling line rarely has a core of some other material, but logging cables do.

Finished this last week end.

Some burners require about 5 psi, or inches of water column for natural gas. You can call/email the company who made the forge and they maybe able to tell you what you need to know. Good luck.

Just a note about the propane company's concerns. About three years ago, I remodeled an old bunkhouse and added propane heat and cook stove. The propane company of course had to test it before hooking me up. I wasn't surprised that the system was leak free, seemed pretty straightforward plumbing.I was surprised when the propane guy said that he'd been doing that work for about four years and mine was the first owner installed system he checked leak free. Apparently there is some pretty sloppy work being done.

This thread isn't specific to the forge you're looking at but may give some ideas:



I think 2 pounds/hour of continuous burning is a reasonable estimate, but depends on how much welding you plan on.

Thanks, Corin. I also know units, kidding about the American units, spent 10 years globetrotting for industry short courses. taught me how different metric systems are. SI which doesn't recognize centa and deca, etc. joules, watts, bars, pascals, kg/cm^2 etc. Taught some courses to Libyans in Canada at a time that I couldn't go to Libya and they couldn't come here. They found Canadian metric so confusing they wanted me to stay Imperial (the materials I used were in both systems).

Yes we're on the western edge of this massive front and for us it's moving out and warming up. Minus 37 F yesterday morning with a minus 61 wind chill. Minus 14 when I went to bed, minus 7 when I got up. We'll get to near freezing today.

Here's the link, Corin. My stuff comes in about post 34.Says much the same as you. Sorry I used BTU's and pounds and degrees F, but heck - minus 40 is the same either way.

Corin
I'd love for you to look at a previous thread about freezing propane and comment on whatever. Heat transport may not be your bag, but perhaps the composition of the LPG we call propane is.

Right on Mate. I love a good empirical equation. We didn't get to minus 30 this morning, but it's minus 29.4 as I prepare for bed so we'll be there tonight, then we're due for a warm up although zero is a few days away.

I then realized the error in my thinking. In my application Sonic flows do not restrict mass flow on increase of pressure as was suggested, they limit velocity and increase density. Order is restored in my world

Thanks again Jack, am I on the right track now?

Corin,
Curious about what pressure you're using - upstream absolute, upstream gauge or differential which in most cases would be upstream gauge. Beyond that You'll have to wait a few days and I'll get a better answer. It's currently near minus 30 degrees Celsius here. I have 34 horses to care for then head for the University to teach a class. You might search on critical flow provers, but think of sound as a pressure wave. The speed of sound in any medium is the speed that a pressure wave travels. Once that velocity is reached by the gas stream a change of pressure at one end of the orifice will not be transmitted to the other end, so the mass of gas flowing only depends on the max density of the gas or upon the upstream pressure. The downstream pressure or differential pressure drops out of the equation.

My guess with LPG is that your tables assume atmospheric as the low pressure. Then "pressure" is upstream gauge pressure or differential pressure. At subsonic flow the differential pressure is what counts. At high pressures there isn't too much difference between gauge and absolute and you've come up with an emperical equation that does good job of bridging the gap. If you're curious, My job deals with natural gas at very high pressures.

Sonic flow occurs when the downstream pressure is approximately half of the upstream pressure. It's not quite that simple, but close enough. The downstream pressure for us is atmospheric or at sea level about 15 psi absolute (zero gauge).After that occurs, the flow rate is only dependent on the upstream pressure. 15 psi gauge pressure (30 psi absolute) would give half the flowrate as 45 psi gauge (60 psi absolute. This is roughly in line with the rates given. If you'd like more precise numbers, I can supply them. But roughly above 15 psi gauge you will have sonic flows in the orifice.

The anvil may not actually crush, but the stuff around it will be molded to it's shape until it all gets melted -- sad story. It won't see the light of day again.

In the good old days of 1992 (when I wasn't good and I wasn't old), I flew to Barcelona to serve as farrier for the USA endurance team and took tools plus a small anvil. Only thing said was that my luggage came off the plane with large red stickers that said "heavy". I wouldn't even dream of trying that today.