I Bought Kilner Jars Instead of Ball

[MonarchistPiper]

I actually have a bunch of Mason-branded wide-mouth jars and all the lids do that. You just can't overtighten them.

Interesting...

 

[MonarchistPiper]

I did not even know of Kilner jars until reading this thread. Have always been using the Ball/Kerr brand jars here in the USA.

I suppose in Uruguay, there are places to source Kilner jars, replacement tops and rings. Here's a site for the USA:

Kilner Wide Mouth Canning Jars

I hope you resolve your sealing issue @MonarchistPiper...

Thanks man!

 

[MonarchistPiper]

What's happening when you over-tighten is that the threads are "jumping", that's why it goes loose. Essentially the ring is stretching outward and the thread on the lid "jumps" the thread on the jar.

You mostly see thread jumping (generally speaking with anything, not specific to jars) with soft materials like plastics, or in cases where you're using mixed brands where the threads might not have exactly the same pitch or may not have exactly the same diameter, or where even though the thread pitch/TPI is the same, the threaded length is different for each.

In other cases with harder materials (metal into metal, like a metal screw into a piece of metal, or metal and plastic), you tend to instead strip the threads rather than jump them.

If the lid rings are old, they may be more malleable, or the threads could be worn down, or the lids could be misshapen (out-of-round).

It's never a good idea to over-tighten anything, especially when there's gaskets involved. May seem counter-intuitive, because "tighter means tighter", but over-crushing a gasket can deform it and cause an open area that will leak if you exceed the gasket's squish tolerance.

That makes sense, it seems then that I broke them myself probably from overtightening? I mean other people in the threaf were saying you would need a wrench but Im a pretty strong dude (Im fat lol). I will probably buy 6 more jars and just replace the ones I broke.

 

[FLDRD]

exceed the gasket's squish tolerance.

Love it. Perfectly understood.

 

[woodsroad]

I’ve had some bad Ball-branded rings that slip before they tighten, so the same can happen with any brand. My guess is the stamping dies wear out, or the press is out of adjustment. I inadvertently bought some Chinesium rings at WallyWhirled, and they sucked, too.

Go buy some new rings, return the malfunctioning ones.