Boar Fencing?

[Wao nahele kane]

Oink,
We drove up to Indiatlantic from driving around down south... we were visiting friends there.




E ho'a'o no i pau kuhihewa.

[Wao nahele kane]

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=search-alias%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/index.php?main_page=index&cPath=107_108_112&sort=20a&page=2&zenid=fd7euj4jjq668fhde6qnfkb310


E ho'a'o no i pau kuhihewa.

[allensylves]

Great, thanks for the info.

So now another question about the bit to use. There are various bits listed on eBay. One set is kind of like the end on a star drill with a 1 inch H-tread (sic, thread):

http://cgi.ebay.com/5-Steel-Rock-Concrete-Drill-Bits-1-375-or-1-3-8-New_W0QQitemZ190297011193QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item2c4e95f3f9&_trksid=p3286.c0.m14&_trkparms=65%3A12|66%3A2|39%3A1|72%3A1205|293%3A1|294%3A50

Would these be suitable?
Thanks.

Allen
Baton Rouge, LA & HPP

[Wao nahele kane]

Allan,
Hmmm, I must not have clicked the submit reply button on my answer this morning. Been driving all day from Seattle and now down in Yreka, Ca for the night, so, I'll keep this short, very tired.
Actually those bits appear to be for heavy duty operations using a water based drill system. Perhaps for boring deep holes into rock for demolition charges in roadway construction, etc.
The bits shown in the link that I posted will last forever if only used in Lava.
One could also rent a roto hammer and bits from Home Depot in Hilo...



E ho'a'o no i pau kuhihewa.

[Rob Tucker]

While considering renting tools I will point out that there is a locally owned and operated rental company in Keaau.

Puna Rental 966-5491

Spend your money locally as much as you can.

[MarkP]

I rented an electric hammer drill, 1 3/8" bit, and generator from Puna Rentals for this purpose. It was a good experience.

In real life you will be lugging this 50 lb hammer drill around on rough lava and through strawberry guava thickets. If there is rubble, you will get started with a hole and then the football sized rock you are drilling through will shift on you which means you are no longer drilling where you were originally and the half drilled hole is not vertical anymore. Sometimes the bit jams in the hole and you have to do deep knee bends while lifting up on a 50 lb drill stuck in a 50 lb or greater rock. It is best to keep pulling the bit up out of the hole as you are drilling to clear the rock dust from the hole. This reduces the tendency to jam. The pneumatically operated drills vent the exhaust air out the tip of the drill which clears the hole as you go. In my experience after the first hole you will not be too concerned with neatness, exact positioning, or getting a nice vertical hole. The job is equivalent to operating a jackhammer.

[MarkP]

If you rent from Puna Rental they will just give you what you need. If you have not done this before I recommend the smaller electric drill. If you are ready to rock and roll you would choose the pneumatic hammer with the big diesel compressor.

[allensylves]

Thanks for the info.

Wao,
Good luck on the trip.
I grew up in eastern Washington and went to grad school at UC Davis, so I know the trek up and down I-5 and 97 well.

Allen
Baton Rouge, LA & HPP

[oink]

Very helpful information, thanks. What size rotary hammer do you recomend for a 2 acre fencing job? I think I will figure the tool cost into the fencing and buy it. That way if it takes me 6 months to do it, no problem.

Pua`a
S. FL
Big Islander to be.

[Wao nahele kane]

My, my... This was some time ago.
Today, I'm off to pick up some things for fencing.
Since this thread was started, Li-ion battery powered rotary hammers have been created.
Using an 1 3/4" core cutter bit on one of these drills, SDS plus or SDS Max versions will cut a hole for T bar or SDS Max for larger holes for bigger posts.
Will post some pictures for setting T bar in lava later.