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Posted

the lower half acts as a receiver on a compressor, as you pump it fills the lower section compressing the spring and meaning you can get a steady stream of air, there is no mechanical linkage between the 2 chambers

Posted

the lower half acts as a receiver on a compressor, as you pump it fills the lower section compressing the spring and meaning you can get a steady stream of air, there is no mechanical linkage between the 2 chambers, there is also a spring inside the top chamber.

have seen a few of these bellows before.

Posted

Some smaller bellows like this were used to drive tiny dentist drills. Should work fine for a small forge. Make sure to have a short air run and to avoide any tight right angles

Posted

Bought a similar bellows at BAM conference from Bob Alexander a year or 2 ago, but haven't used them.

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