07-01-2009, 12:04 PM
What sort of drill to use and depth...
Depth... 12" minimum should do fine in most cases and I'd shoot for a plumb hole (Calibrate in a trailer leveling bubble on the back of the drill if it doesn't have one, most drills don't).
Drill type? Any rotohammer type large enough to recieve the desired bit. A Bosch, Hilti, Milwaukee or Hitachi are the 4 most common.
Here's a link to some on Amazon.com http://www.amazon.com/s/ref=nb_ss_hi?url...as%3Dtools&field-keywords=roto+hammer&x=14&y=17
Just make sure you get one that can do the job with the required bit diameter. The larger roto hammers can use very large hammer type coring bits too if you ever face having to bore a large diameter vent hole through a foundation, you have to chip out the core to drive deeper than the depth of the bit though.
There's a couple differing bit's that can do the job for a steel fence post but a common spline double auger masonry bit will do fine. Here's several in the link.
http://www.toolpusherspecialtytools.com/...page=index&cPath=107_108_112&sort=20a&page=2&zenid=fd7euj4jjq668fhde6qnfkb310
E ho'a'o no i pau kuhihewa.
Depth... 12" minimum should do fine in most cases and I'd shoot for a plumb hole (Calibrate in a trailer leveling bubble on the back of the drill if it doesn't have one, most drills don't).
Drill type? Any rotohammer type large enough to recieve the desired bit. A Bosch, Hilti, Milwaukee or Hitachi are the 4 most common.
Here's a link to some on Amazon.com http://www.amazon.com/s/ref=nb_ss_hi?url...as%3Dtools&field-keywords=roto+hammer&x=14&y=17
Just make sure you get one that can do the job with the required bit diameter. The larger roto hammers can use very large hammer type coring bits too if you ever face having to bore a large diameter vent hole through a foundation, you have to chip out the core to drive deeper than the depth of the bit though.
There's a couple differing bit's that can do the job for a steel fence post but a common spline double auger masonry bit will do fine. Here's several in the link.
http://www.toolpusherspecialtytools.com/...page=index&cPath=107_108_112&sort=20a&page=2&zenid=fd7euj4jjq668fhde6qnfkb310
E ho'a'o no i pau kuhihewa.