Maff help
Im looking into turning my hand pump into a powered unit. Ive got several ideas on how I would like to do it. I just want to get some numbers nailed down before I shell out any cash on parts.
Putting my pump on a cheapo bathroom scale it takes around 180 lbs to pump that thing on the hard end. It might be less but that is what it takes if I go slow on the stroke so I can clearly see the numbers scale up. The stroke is 16 inches. If I decide to go with a radial device the arm would be 8 inches long. What torque am I going to need at the shaft to turn that arm?
Oh, that amount of force is only needed at the last couple inches of the stroke. So if the arm at that point is almost inline with the piston stroke would say a 200 in lb of torque do it?
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Well, free to you maybe ). Not everyone has 100 bucks of free steel plus 50 bucks in hardware plus a 60 dollar motor plus a transmission laying around ).