Made my engine hoist a little better.

[tonyfoale]

I replaced the hydraulic jack with a battery powered linear actuator (3000 lbs. capacity). Raising and lowering the boom became a breeze.

That would be a great improvement but 3000 lbf would not be anywhere near enough for me. I will look for a bigger capacity.

[mansworld]

I was referring to the 1.5 - 2 ton foldable engine hoist pictured in the subject. furthermore, 3000 bls. /1.5 ton was the biggest capacity battery powered linear actuator available at Amazon, and I doubt if you can get any larger capacity than that. One thing you do is to add extra actuators and join them in a group till you reach your target capacity.

That would be a great improvement but 3000 lbf would not be anywhere near enough for me. I will look for a bigger capacity.

[tonyfoale]

I was referring to the 1.5 - 2 ton foldable engine hoist pictured in the subject. furthermore, 3000 bls. /1.5 ton was the biggest capacity battery powered linear actuator available at Amazon, and I doubt if you can get any larger capacity than that. One thing you do is to add extra actuators and join them in a group till you reach your target capacity.

The 1.5 - 2 ton is at the end of the boom. The actuation is way back from that and so through leverage you need several times 1.5 - 2 ton at the actuator to get 1.5 - 2 ton at the hook. Using a 3000 lbf actuator may give you a useful tool but it will not give you 3000 lbf where it matters.

[mansworld]

The 1.5 - 2 ton is at the end of the boom. The actuation is way back from that and so through leverage you need several times 1.5 - 2 ton at the actuator to get 1.5 - 2 ton at the hook. Using a 3000 lbf actuator may give you a useful tool but it will not give you 3000 lbf where it matters.

A one good thing about linear actuators/ screw jacks, is that they are oil-leak free. I have 3 oil leaking hydraulic jacks on my repair shelf. There are screw jacks with a capacity of up to 200 ton, and travel length of 3.5 meter/ 138 inch. Screw jacks are often custom-made to meet specific application needs.