mopar
Silver Member
will a 3 point mount post hole digger go through slate rock, i,ve been out digging some holes by hand and am hitting slate and am wondering if a pto post hole digger will bust through it.
Posthole Digger post hole digger user question
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MikePA
Super Moderator
<font color="blue"> will a 3 point mount post hole digger go through slate rock </font>
Some augers do better than others with rock, but a phd is not designed to drill through a layer rock. Most augers will simply sit and spin when they hit rock because they do not have downforce. Rocks that can fit between the flutes can be brought up, but going through a layer of rock? Not usually.
I suggest giving Danuser a call and tell them what you're running into and see what they recommend. There are hydraulic models that fit on a FEL, allowing you to use the FEL to apply downforce. There are also models that fit on a Bobcat.
Some augers do better than others with rock, but a phd is not designed to drill through a layer rock. Most augers will simply sit and spin when they hit rock because they do not have downforce. Rocks that can fit between the flutes can be brought up, but going through a layer of rock? Not usually.
I suggest giving Danuser a call and tell them what you're running into and see what they recommend. There are hydraulic models that fit on a FEL, allowing you to use the FEL to apply downforce. There are also models that fit on a Bobcat.
RoyJackson
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It would be a bit of a hassle, but if the slate isn't too thick, you could use a tunneling bar to break it up
</font><font color="blue" class="small">( It would be a bit of a hassle, but if the slate isn't too thick, you could use a tunneling bar to break it up )</font>
what is a tunneling bar, we have what is called a san angelo bar it's about 6' tall a point on one end and a 2'' flat at the other we use for diging /prying rocks out is it something like that?
what is a tunneling bar, we have what is called a san angelo bar it's about 6' tall a point on one end and a 2'' flat at the other we use for diging /prying rocks out is it something like that?
RoyJackson
Rest in Peace
- Joined
- Nov 17, 2001
- Messages
- 24,890
- Location
- Bethel, Vermont
- Tractor
- John Deere 4052R Cab,, Deere 855D UTV, Z920A Zero Turn Mower and assorted implements
what is a tunneling bar, we have what is called a san angelo bar it's about 6' tall a point on one end and a 2'' flat at the other we use for diging /prying rocks out is it something like that?
Same thing...
Same thing...
dawson
New member
Whether or not the digger will penetrate slate depends upon the point on the auger.
The Pengo Agressor Point on my 9" auger might be able to do it.
Best regards, Dawson
The Pengo Agressor Point on my 9" auger might be able to do it.
Best regards, Dawson
Tom_H
Veteran Member
I have a BX2200 and a Green PHD and auger from Northern. It digs in my clay when slightly damp. Below my clay, I have a water impermeable silica cemented hardpan called durapan. It is almost as strong as concrete. The PHD just spins around when it gets down to this stuff. A neighbor has a Bobcat with downpressure and a carbide fishtail auger bit which cuts the stuff easily.
TBN member ultrarunner, who lives in the Oakland Hills where there is serpentine rock, has a BX23 with a Land Pride PHD. The unit has a downpressure kit and I believe a carbide fishtail auger bit. He paid $1800 for the unit.
TBN member ultrarunner, who lives in the Oakland Hills where there is serpentine rock, has a BX23 with a Land Pride PHD. The unit has a downpressure kit and I believe a carbide fishtail auger bit. He paid $1800 for the unit.