@120 feet no water?eish huku ni wapi?

Its not vibration that killed it. The impeller must have been made of brass which is intolerant to silt. Pumps with plastic impellers perform better as they can withstand light silt without seizing. The pump should be suspended, not in contact with your wells base.

Congratulations! I know someone who uses a Pedrollo pump from a 92 foot well up to the house's water tank. Has never used a submersible pump but has had to replace the pedrolo twice in the last 8 years.

Also, I need someone to complete a well for me. The place has a bit of hard rock at some point but wells there are generally not as deep as yours. They generally get to between 60 - 80 ft. Did you encounter that hard rock?