FYI - For building an entire dock (100-150 posts, depending on size), a Rhino PD140 or PD200 is ideal with a 100 CFM Compressor and a floating platform with a small hoist. Just impractical for repairs/small jobs (20-30 posts)
Hydraulic is out, the equip is heavy/bulky/messy. My current setup is a 60# driver (Total weight) operated by 6 CFM compressor. Even adding mass, I don't intend for the driver to be over 85#. Portability is the key here for small jobs without a crane or floating platform. It works pretty dang...
Not a bad idea Compositepro, however The air hammers I think of would require a large compressor and accessories, which I am trying to avoid for smaller jobs. Actually a gas powered jumping jack tamper might be able to be modified to achieve a self sufficient driver. Just need to look at impact...
Wow! Tons of info here. Buggar, if I was only 15 again the ether suggestion would immediately rise to the top! However, due to lessons learned at the age of 15, I need to put that one on the back burner until I give up on the idea and want to destroy all evidence.
After considering the advice...
The smaller tube is attached to the 4x4 post with a bolt on each side. Sorry it is not shown in the illustration. Even so, if the small tube/4x4 assembly has enough mass to keep it from raising off of the lake bottom at the start, will the upward pull on the post negate a portion of the impact...
Thanks for the replies. I have looked into internal combustion drivers but I am not ready to abandon this project just yet.
Above is a sketch of the driver. The current design is the same but no springs. It is portable enough to handle without a floating crane/hoist and works adequately, but...
Full Disclosure - I am a building contractor with an affinity to design ways to reduce labor and/or allow me to complete tasks in an efficient way.
I have built permanent docks that utilize 4x4 treated posts driven into the lake bottom. Large pneumatic drivers work great but require an 80+ CFM...
