how do i fix this?

Got a weed whacker that has a black poly/plastic rotary head on a motor shaft. The shaft is approx 1/4" dia and 2" long.
The head was originally a press fit onto the shaft. Somehow, it has loosened and now the rotary head comes off periodically.
I'm trying to fix it, and need ideas. I just put some locktite on it today, and stuck the head back on the shaft. However, locktite says use only with metal. I don't know if it just means it won't work with anything but metal or what. I'll know tomorrow pm if it works.
Assuming it doesn't, what else can I try? JB weld? Ideally I'd like to drill through the roary head housing and shaft, and cross pin it. However, the out diameter of the housing I'd have to drill is approx 5"---too wide a span for my bits.
Ideas appreciated.
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Take a dremel and scar a couple of areas of the shaft. Then get some epoxy that can be used on plastic and permanently attach it.
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There is an epoxy cement, Can't remember name, That expands as it sets up and cures. That is what i would use .
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hole in the head has worn larger and any "fix" will be temporary. If you use cheapo's like I do, answer may be a new one! Marshel

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Put it out on the curb and shop for a new one. Everybody has close out sales on lawn items now, so it's a great time to buy. Your time is worth more than the frustration and dubious results a repair attempt will produce. HTH
Joe
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