Making tubing

fiver

Well-Known Member
i think that's a different type zerk fitting.
i'm trying to dig back in the dim recesses, but i seem to remember an oil gun that sorta looke like a cross between one of those old fly/skeeter sprayers/bike pump, and a grease gun that didn't have the pump handle.
super similar to what Ian is sayin to build but bigger.
anyway the zerk fittings were different, as was the nozzle, like the end slipped over the zirc and held a little needle that pushed the zircs ball in so the oil could flow through.
 

Bret4207

At the casting bench in the sky. RIP Bret.
i think that's a different type zerk fitting.
i'm trying to dig back in the dim recesses, but i seem to remember an oil gun that sorta looke like a cross between one of those old fly/skeeter sprayers/bike pump, and a grease gun that didn't have the pump handle.
super similar to what Ian is sayin to build but bigger.
anyway the zerk fittings were different, as was the nozzle, like the end slipped over the zirc and held a little needle that pushed the zircs ball in so the oil could flow through.
I've got a couple styles of that basic type. I think they may have been called "volume pumps" as they pushed a volume of lube and not much in the way of pressure.
 
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Petrol & Powder

Well-Known Member
............He said that he had never seen a machine tool ruined by having the wrong oil put in it. But he had seen plenty ruined by running them empty. He then followed this up with the obligatory “you should always try to use the right oil” speech.

I once knew a guy who had been a bush mechanic up in Alaska. He had worked in logging and mining camps. He once told me a list of systems he had put 30 weight motor oil into. It was shocking to me, brake masters cylinders, hydraulic cylinders, rear end gear boxes. When I expressed my shock he just said “If a machine ain’t working, you ain’t making no money, and there ain’t no auto parts store within two hundred miles, so we did what worked!”
/\ never been said better/\
The wrong oil/grease is better than NO oil/grease.

And sometimes you do what you must do, not what you want to.

I admire people that are intelligent enough to know what they should do but pragmatic enough to see the big picture.
 

Snakeoil

Well-Known Member
Boy, that sure looks like a regular grease gun to me. Must have a check valve in the spout to keep it purged and stop oil from running all over the oiler's cart.

That's a nice jig you made for cutting the radius in those pieces. Jigs like that make life so much easier. I see you make quite a few of those so it makes sense that you would take the time to make the jig.

Many years ago I worked in an atomic power lab that was part of the US Navy. Rickover was doing a lab visit and a walk thru of the machine shop. He was a neat freak and we were told to get rid of everything under our benches. Everything went into the dumpster behind the shop. Rickover's walks thru the shop took all of 2 minutes. He was barely out the door when all the guys were streaming out the back door to retrieve their jigs and fixtures from the dumpster. Never saw old guys move so fast before.
 

KeithB

Resident Half Fast Machinist
Many jobs go so much better with good jigs and fixtures. Some are impossible without one. We have so many I started awhile back building wooden crates to keep things organized.

Just wish I could weld better!
 

STIHL

Well-Known Member
Never ran one of those, but we had a bunch of old Carlton drills here in the plant and those things are beasts. Similar to the style of yours. Loved running them. Makes light work out of punching holes through thick material.
 

KeithB

Resident Half Fast Machinist
My oil gun arrived. It's made in Germany. There is a check valve in the nozzle. There are four fingers in the end of the nozzle, you have to unscrew it a little to get it to go over the fitting. Unscrew it too far and all the little pieces will fall out. (Luckily I found them all on the floor and got everything put back together OK!) Haven't filled it with oil yet, I'll do that tomorrow when Scott comes in. There is a purge valve at the front of the cylinder to let the air out.

oilgun2.jpg
oilgun4.jpg
oilgun1.jpg
oilgun3.jpg
 

Ian

Notorious member
Before you fill it, would you mind taking a picture of the piston? Inquiring minds want to know.
 

KeithB

Resident Half Fast Machinist
Sure will. I don't know if I can get the piston out easily, you can only access the tube from the front end. I did look down the tube and the face of the piston looked like a cup type seal, but maybe it also has O-rings where I can't see them.
 
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Ian

Notorious member
I'm just curious if it has a stepped buna-n cup bolted to the rod or a genuine piston. Most grease guns have a piston which will squish enough to run up inside a cartridge tube OR seal to the metal tube and be refilled from a bulk grease pump through a fitting in the head of the gun. A $15 grease gun from the usual scumbags ought to hold and pump oil just fine with this system except no check valve in the hose.
 

KeithB

Resident Half Fast Machinist
Yes there does. I'm not sure from the casual look-see I gave it but the piston face looked like it had a cup or face seal similar to this:


1639100183334.jpeg
I'll look closer tomorrow.
 

KeithB

Resident Half Fast Machinist
Here are pictures of the piston assembly. The seal on the cap end is a flat face type seal. The piston has two cup type ring seals, both facing the same direction. I'm glad I waited for Scott to come in, it was a real PITA to get back together!

Flat face seal on cap end. Note air purge valve on left.
oilgun7.jpg

Piston and rod assembly
oilgun6.jpg

The piston is held on the rod with a stab crimp. The two cup type ring seals are both facing forward. Max sealing under extension pressure, minimal force required during retraction for filling.
oilgun5.jpg

Some pictures off the web of the same type seal, it's a little clearer how its shaped.
download.jpg
images

Some
 
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Ian

Notorious member
So MUCH better than a grease gun. I forgot GGs don't have a seal on the cap end. Thanks for going to the trouble!