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Threaded schrader valves

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Threaded schrader valves

Unread postAuthor: meatballs » Wed Apr 18, 2007 12:05 pm

I have been thinking about ways to make threaded schrader valves. I can get basically unlimited schrader valves from bike shops, just ask for flat inner tubes and they give you them for free, but i prefer having them be removable. I've experimented a little with epoxying them into fittings like 1/4" nipples or 1/4" to 1/8" threaded bushings, brass of course. Has anyone else tried something like this? Found anything that works well?
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Unread postAuthor: pyrogeek » Wed Apr 18, 2007 1:56 pm

If you could dissolve the rubber away (with xylene or something), maybe you could solder it into a brass fitting. An old brass air tool nipple would probably work.
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Unread postAuthor: spudthug » Wed Apr 18, 2007 2:45 pm

dude..u can buy threaded shraders...go to wal-mart...if there is no wal mart near u almost all auto stores that i have been to have them.
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Unread postAuthor: lukemc » Wed Apr 18, 2007 2:55 pm

you cannot buy a threaded shrader a wallmart look at the website or look at any auto parts store website your not gona find threaed shraders
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Unread postAuthor: spudthug » Wed Apr 18, 2007 2:59 pm

yes u can buy threaeed(ur spelling) schraders at wal mart lol...go to the auto section...they do not have all of their products on walmart.com....

btw i boguht mine there....3 dollars....so u definately can buy them there
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Unread postAuthor: deusXmachina » Wed Apr 18, 2007 3:00 pm

I've tried the method of epoxying them into 1/4" nipples but that wasn't terribly effective because the rubber tended to flex out of the fitting when you attach an air supply to it. I like pyrogeek's suggestion of brazing the schrader onto a fitting. Bonding metal to rubber just isn't fun. Maybe QuikPlastic (R) would do the trick. It comes in a tube like cookie dough you cut off a slice and kneed it together and you work it like playdoh it sets fast too.
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Unread postAuthor: rad14701 » Wed Apr 18, 2007 5:56 pm

Yes, Wal-Mart does carry threaded schrader valves, as does virtually every automotive, truck, or farm supply store... One should never base judgment on what is available on big-box websites... They tend to only list limited, popular, price targeted, items... Most big truck and farm tractor tires are tubeless today and rely on a threaded schrader valve which is mounted directly into their steel wheels... They are much more common than one might think...
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Unread postAuthor: frankrede » Wed Apr 18, 2007 6:00 pm

Not my walmart or autozone.
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Unread postAuthor: meatballs » Fri Apr 20, 2007 9:21 am

I haven't seen any schraders at Walmart and they don't have them at the Sears auto store near me, and its cheaper if i just make my own. a dollar for a brass fitting, and the valve itself is free. one thing i did try is shaving off the rubber around the valve so i got down to the brass tube on the part that sticks out on a bike wheel, just below the metal threaded part. i then epoxied brass to brass, that worked pretty well. any brilliant ideas about what fittings to put them in? i prefer a diameter of 1/4" where I'm actually threading into the cannon, but i maybe 1/8" would be fine too, I've never tried that size.
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Unread postAuthor: Zorrowannabe9 » Fri Apr 20, 2007 9:30 am

or they're like a buck or two off of Mcmaster.com
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Unread postAuthor: rad14701 » Fri Apr 20, 2007 6:10 pm

I find it hard to believe that threaded schrader valves can't be found somewhere in just about any town... All towns have truck repair centers or farm equipment centers or bicycle shops or automotive parts warehouses or tire stores or high performance and racing stores... Picking up the telephone and asking the guys at the parts counter might yield faster results than wandering aimlessly through poorly laid out stores... Or, better yet, visit the local junkyards...
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Unread postAuthor: Gsu » Sat Apr 21, 2007 9:08 am

I'm having the same problems finding a threaded shrader, I live in Holland.
Car shraders are all rubber and get pushed straight into the tire.
Bike shraders have a very exotic thread on them (32ways 5/32").
I dont know about truck/farmtruck valves, I should try finding those.

Right now I bored out a 1/4" end cap and soldered a bike shrader into it atm. Unfortunately that broke the shrader so it leaks a bit, I guess it melted something inside. You could try heating the parts to be soldered up separately making sure you only heat up the shrader for a couple sec, only the outer bit of the thread.
I plan on epoxying it in next time, havent done so yet since all bike shops here throw their flat tires away immediately :?.
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Unread postAuthor: McSpudsalot » Mon Apr 23, 2007 4:44 pm

Yeah thats it .
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Unread postAuthor: meatballs » Mon Apr 30, 2007 2:49 pm

i know REI doesn't throw away their bike tubes, thats where i get my schraders. how much is shipping at mcmaster?
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Unread postAuthor: bboymatty » Mon Apr 30, 2007 10:19 pm

go to a local auto store that sells bits and bobs for auto's, and look for the metal threaded schraeders they sell.

I picked mine up from REPCO, for $18 AUD, and it works a treat, has a screw on one end and a plastic bumper on another to seal off the thread.
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