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One thing to keep in mind about steel bottle jacks - they don't do very well with loads that flex a lot, like a tree rocking back and forth in the wind. That's one of the reasons
why Ray Silvey made his out of alloys - they handle load variance better. Also, without a gauge on a bottle jack, you'll have to be very careful about the kind of load you put
on it. Luckily, you can use the handle to help gauge the kind of pressures the jack is under - you can feel it "load up" and work accordingly.
An old friend of my dad's was a faller from the late 50's to the early 80's, and there were old-skool steel commercial tree jacks sold back in those days. He and a partner were using
a set on a sale down near Brookings. He said the wind came up and sat a big tree back on that steel jack and they got away from the stump - it blew up and he said it sounded
like a bomb going off.
why Ray Silvey made his out of alloys - they handle load variance better. Also, without a gauge on a bottle jack, you'll have to be very careful about the kind of load you put
on it. Luckily, you can use the handle to help gauge the kind of pressures the jack is under - you can feel it "load up" and work accordingly.
An old friend of my dad's was a faller from the late 50's to the early 80's, and there were old-skool steel commercial tree jacks sold back in those days. He and a partner were using
a set on a sale down near Brookings. He said the wind came up and sat a big tree back on that steel jack and they got away from the stump - it blew up and he said it sounded
like a bomb going off.
