Harleman Mfg. Ground Force model 3305 auger drive drilling in solid rock.

Ideally....The MT55 works good for everything I do...unless i'm drilling holes in rocky ground. I'm wondering if I could get a different drive auger for the MT55. Something that spins slower but would have more torque, and then also get a rock bit. I'll have to find out if a low torque auger drive unit will work the MT55. It would take longer to drill a hole in easy soil...but that's not a concern for me. Check out t

Discuss this in the forum topic Post Holes 1845c vs Mini Track.