What drill for tree stumps?

[waz77]

Hi all,

I have about 200-300 tree stumps to drill for eco plugging, through a woodland site about 20 miles from our yard. Im looking for a suitable cordless drill that will be upto the job without losing power after 5 mins, ive tried with an 18v drill but flattened 2 batteries in about 10mins. Any suggestions?

[Owen Green]

We use a stihl petrol drill, no worries about flat batteries!

[bikewoo]

Battery drill should be OK as long as its not a cheepo, a lot will depend the type of drill bit you use. An auger bit at low speed would be worth a go.

 

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[Burgess]

I use a 36v Bosch for everything, battery lasts all day when fencing, but comes with two anyway so should be enough. Also has plenty of torque. Heavy though.

 

 

One of these Bosch GSB36V-LICP 36V Cordless Compact li-ion Combi Drill (2 x 1.3AH Batteries)

Edited March 14, 2014 by Burgess

[daltontrees]

Brace and bit is a pretty good back-up, once you put the butt of the brace on your stomach, put some weight on it and give it a few turns, you're there. Surprisingly quick and easy. Picture borrowed form Wikipedia

[SamWhiting12]

I tried drilling stumps with a Bosch battery drill and the battery lasted 10 minutes on it. Get a generator and an electric drill maybe?

[daltontrees]

I guess the secret is to get the batteries with the highest Ah rating for the voltage. For example, the total energy stored in a 1 Ah 24V battery should be the same as a 2 Ah 12V battery.

 

I occasionally have t take cores of tres with an auger bit. I am seriously thinking of converting one of the dud batteries on my Makita to a connection to a car battery. Not very portable but for roadside trees needing 6 300mm cores the weight isn't a problem and that much wet wood drilling will kill a Makita 14.4V 1.3 Ah battery after 3 cores.

[Big T]

I got a Dewalt 18v Lithium Ion set, 4ah and does me a days fencing!

[daltontrees]

I got a Dewalt 18v Lithium Ion set, 4ah and does me a days fencing!

 

Now you're talking! That's a whopping 72Wh. Enough energy to light a room for 4 hours solid.

[Andrew Gale]

In my experience it's just as much about how sharp the drill bit is and what timber you're drilling into. I tend to carry a number of spare drill bits with me and change as soon as the edge starts to go; at some point I'll get round to sharpening those up. But to answer your question, I use a Hitachi 18v with two spare batteries, so far no real issues