Search found 1291 matches

by Labtecpower
Sun Jan 19, 2020 3:03 pm
Forum: General How-To & Discussion
Topic: "In the world of spuds today"
Replies: 2411
Views: 136898

Re: "In the world of spuds today"

Or you could use engine oil. It might not be quite as good, but even fish oil is better than no oil. Apart from the stench. On my Schaublin, which has a bearing headstock, I use motor oil. The ARE gets Dexron II, which is apparently nicer to plain bearings than "modern" motor oil, something to do w...
by Labtecpower
Sat Jan 18, 2020 5:07 pm
Forum: General How-To & Discussion
Topic: "In the world of spuds today"
Replies: 2411
Views: 136898

Re: "In the world of spuds today"

That list grows pretty fast the more you think about it doesn't it lol. Maybe we need to wait for JSR to test the precision of his machines before we start talking him into throwing money at trinkets he might need in the future :P Now whe're talking nice clamping tools, at the job we've collected a...
by Labtecpower
Sat Jan 18, 2020 3:21 am
Forum: General How-To & Discussion
Topic: "In the world of spuds today"
Replies: 2411
Views: 136898

Re: "In the world of spuds today"

That's a nice looking vice right Gippeto! Also has some proper weight to it, which usually is a good sign. How's the upwards travel on the moving jaw when clamping down hard on a workpiece? The one I linked to has the benefit of the vise screw claming downwards, preventing the jaw from tilting when ...
by Labtecpower
Fri Jan 17, 2020 3:36 pm
Forum: General How-To & Discussion
Topic: "In the world of spuds today"
Replies: 2411
Views: 136898

Re: "In the world of spuds today"

Purchasing my own property has definitely opened the flood gates :D While you're here, what style of milling vise would you recommend? Is a tilting swiveling vise actually useful or am I OK with this for now? I've always mostly used the latter for the Sherline and hardly ever used the tilting colum...
by Labtecpower
Sat Sep 14, 2019 1:12 pm
Forum: General How-To & Discussion
Topic: "In the world of spuds today"
Replies: 2411
Views: 136898

Re: "In the world of spuds today"

Booo Turkish guns!!! Booo!!! But if it was cheap and it works, why not :) what caliber and energy? 6.35, datasheet says 46 joules or 265 m/s. Of course they don't tell with what kind of pellet that is. This caliber should be good for moar powah though, I'd like to figure out if I can make this thin...
by Labtecpower
Thu Aug 29, 2019 4:44 pm
Forum: General How-To & Discussion
Topic: "In the world of spuds today"
Replies: 2411
Views: 136898

Re: "In the world of spuds today"

I suggest you use preloaded cartridges with HHO, and the ammunition included in them. This way it can even work semi-automatically. I have the idea, (intuitive), that likewise, a propane-air combustion weapon can be improved in this way. As always, it's a matter of manufacturing and testing, becaus...
by Labtecpower
Mon May 20, 2019 11:42 am
Forum: Hybrid Cannons
Topic: Cooking up a little something...
Replies: 76
Views: 11169

Re: Cooking up a little something...

According to several sources a cat shoved over the muzzle makes a good muffler, but to avoid the mess and other issues that may or may not arise, I would fire into a box filled with wet rags (so you dont start a fire while you muffle the noise)
by Labtecpower
Fri May 03, 2019 2:06 am
Forum: Hybrid Cannons
Topic: Cooking up a little something...
Replies: 76
Views: 11169

Re: Cooking up a little something...

You'll be fine with the flanges man, you've got 1" thick 6061 to keep the 28 bars of pressure inside :D For the tie rods i'd simply go with large washers, a steel plate over the whole flange would be overkill. I expect the chamber to fail way before your endcaps do. (I'm not telling you to worry abo...
by Labtecpower
Fri Mar 15, 2019 3:40 pm
Forum: Hybrid Cannons
Topic: Cooking up a little something...
Replies: 76
Views: 11169

Re: Cooking up a little something...

Go ahead and push the order button, in my experience the pain of spending money does not last long, and fresh, good quality material is a pleasure to work with. Don't skimp on tools and the like, as my boss likes to tell me "the bitter taste of bad quality lingers long after the sweetness of a low p...
by Labtecpower
Fri Mar 15, 2019 12:58 pm
Forum: Hybrid Cannons
Topic: Cooking up a little something...
Replies: 76
Views: 11169

Re: Cooking up a little something...

I don't think temperature will be an issue, the piston has quite some mass to dissipate the heat, and the heat spike will be over in a few milliseconds. Nylon is unsuitable as a piston material, as it will absorb moisture from the atmosphere and swell op noticeably, I had a nylon piston getting stuc...
by Labtecpower
Fri Mar 15, 2019 2:13 am
Forum: Hybrid Cannons
Topic: Cooking up a little something...
Replies: 76
Views: 11169

Re: Cooking up a little something...

I think the rubber sealing face on the piston isn't needed, you might get away with making the front of the piston conical, which I believe also helps with turbulence.
by Labtecpower
Tue Mar 12, 2019 8:32 am
Forum: Hybrid Cannons
Topic: Cooking up a little something...
Replies: 76
Views: 11169

Re: Cooking up a little something...

Welcome back!

I still regularly visit the forums, but adult life takes up more time than I could imagine when I was younger and could spend hours in the workshop every day. To get myself going again I am currently building a 60 mm QDV cannon.
by Labtecpower
Wed Feb 13, 2019 4:48 am
Forum: BB, Airsoft, and Pellet Guns
Topic: Rattlesnake V3 - HPA auto valve
Replies: 105
Views: 21494

Re: Rattlesnake V3 - HPA auto valve

Ah, I see. Would be pretty easy to tune if you'd use pressurized air instead of a coil spring behind the piston. The diagram you made reminds me a lot of the crosman setup, would be pretty cool to convert the 2240 to automatic :D
by Labtecpower
Tue Feb 12, 2019 3:11 pm
Forum: BB, Airsoft, and Pellet Guns
Topic: Rattlesnake V3 - HPA auto valve
Replies: 105
Views: 21494

Re: Rattlesnake V3 - HPA auto valve

I'm thinking this could be made to fit well in a "T" style submachinegun... http://i.imgur.com/LfKJIuim.png https://i.imgur.com/ufNAPmu.gif Will that mechanism pulse the airflow or will the spring loaded piston just start farting from the pressure applied? I would imagine it to open just enough to ...
by Labtecpower
Tue Feb 12, 2019 3:04 pm
Forum: Pneumatic Cannons
Topic: Breach Loaded Pneumatic Rifle
Replies: 6
Views: 1059

Re: Breach Loaded Pneumatic Rifle

Good start! reminds me of my own first cannon :D You can very easily enhance the power of a ball valve cannon by opening the valve with a spring loaded mechanism instead of by hand, it will open the valve much faster than you can do yourself. Now the projectile leaves the barrel before the valve is ...