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mynameismud
climber
backseat
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Topic Author's Original Post - Nov 28, 2011 - 01:07am PT
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I can get a really good deal on a dewalt 20v hammer drill. Anyone know if they are any good. I do not do a lot of drilling with a hammer drill so if it will do a fairly decent job in granite that would work for me. Let's say 6 to 10 holes per battery, then I think I am good.
TIA
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slobmonster
Trad climber
OAK (nee NH)
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Nov 28, 2011 - 01:43am PT
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You want a rotary hammer... not a hammer drill.
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mynameismud
climber
backseat
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Topic Author's Reply - Nov 28, 2011 - 01:52am PT
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what is the difference?
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mynameismud
climber
backseat
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Topic Author's Reply - Nov 28, 2011 - 02:13am PT
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Ok, anyone know anything of the Dewalt rotatory hammers?
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Mungeclimber
Trad climber
sorry, just posting out loud.
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Nov 28, 2011 - 02:18am PT
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I think Dingus has a dewalt roto.
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mynameismud
climber
backseat
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Topic Author's Reply - Nov 28, 2011 - 02:27am PT
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Munge,
thanks, you have any idea how it does. works ok?
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tradmanclimbs
Ice climber
Pomfert VT
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Nov 28, 2011 - 06:03am PT
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I Have used a 24v Dewalt SDS Rotary hammer quite a bit. it totally rocks. Drilles very fast. much faster than my 36v Bosch. the difference is weight. the dewalt is heavy so it transfers all the energy into the rock. The bosch is super light and has vibration reduction spring in the handle and i feel that is what makes it drill slower.
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JimT
climber
Munich
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Nov 28, 2011 - 10:10am PT
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The top end portable drill at the moment is probably the Atlas Copco Cobra Combi, might not be quite what you want though!
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tradmanclimbs
Ice climber
Pomfert VT
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Nov 28, 2011 - 05:57pm PT
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I have the Bosch ultra light 36v lithium drill. Good for lead drilling and back country humping. Fairly slow drilling for this type of drill. So far only drilled 3/8ths X3" and it is adaquate for that . have not drilled any 1/2 in holes or 9/16th for glue ins yet but assume that I will need a 2nd battery for that kind of duty. I feel that if you are a serious spurt climber and drilling lots of glue ins you will want a heavier burlier drill. the price with a single battery is decent. extra battery is pricy.
PLEASE Please do NOT buy a drill if you do not know the difference between hammer drill and SDS Rotary hammer. Uncontroled Boschdom can be a real eyesore, political mess and hard to reverse. Please do NOT put up a bunch of crappy routs just because you happen to have a drill. Think Long and hard before placeing any bolts and try to think of the greater good. Is this going to be a 5 star classic that you will want your name attached to or is it a chossheap that was better left untouched? How will this affect access? Is this a squeeze job? Additionaly know your hardware and ONLY use the best equiptment for each situation, rock type, weather conditions, traffic levels. etc. If you do not know what I am talking about Do Not Do IT!!!
Thank You.
Nick
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mucci
Trad climber
The pitch of Bagalaar above you
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Nov 28, 2011 - 06:10pm PT
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Yeah Mr. Mud, let the tradman spell it out for you...:)
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tradmanclimbs
Ice climber
Pomfert VT
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Nov 28, 2011 - 06:28pm PT
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That is good to know. The 24 Dewalt that we use quite a bit is at least 2 to 3 times heavier but seems to fire in the holes about twice as fast as the 36V ultra light and gets at least 8 3" x 3/8th holes in our local rock. have not drilled more than 3 holes in any outing with the bosch so do not know what the limits are?
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Reeotch
Trad climber
Kayenta, AZ
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Nov 28, 2011 - 06:52pm PT
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The type of rock makes a huge difference. Granite, basalt, and quartzite are all quite hard, much harder than concrete. With my old Bosch Bulldog, I could drill a 1/2" x 4" hole in desert sandstone in about 30 - 45 seconds sometimes.Sierra glacial polished granite may take 5 - 10 minutes to get a 3/8" x 3" hole, with the same drill. Tells you a lot about the rock.
But, you should use the proper equipment if you are going to place any bolts for climbing. I'd say the 24v Dewalt, or the Bosch 36v, or equivilant, would be minimum. You could probably get away with less in soft sandstone though, to be perfectly honest. The rock makes all the difference. The point is to get a good clean hole, nice and straight, with no cratering around the lip.
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tolman_paul
Trad climber
Anchorage, AK
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Nov 28, 2011 - 06:58pm PT
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If you're only drilling occasionally, look at flea bay for used drills. That said with any cordless tool, figure whatever battery(ies) that come with the tool will need replacing, though go with a pair of gel cells will be much cheaper than a factory battery pack (though requires some additional wiring and drill mods)
You can also check out your local Hilti dealer, I picked up a used TE10A way back when for a fairly reasonable price at the dealer and it worked fine for the occasional bolt and bolt replacement.
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tradmanclimbs
Ice climber
Pomfert VT
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Nov 28, 2011 - 07:00pm PT
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And use the right bolt type for the rock medium and the expected traffic that the bolt will see. In most cases SS is best but there are exceptions where it is acceptable to use galvanized with the proper hardware.
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crunch
Social climber
CO
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Nov 28, 2011 - 07:50pm PT
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I have a deWalt rotary hammer. Great quality, light weight.
Cons: Expensive. Effete yellow color.
Drilled faster, when tested in time trials with new 1/2" bit and a chunk of local, very hard, sandstone, than Verm's much bigger, burly Bosch, in manly blue. Tears might have been shed.
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mike m
Trad climber
black hills
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Nov 28, 2011 - 08:00pm PT
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What is the hardest stone to drill in? I put in a bunch of sport routes in limestone and it can be very soft or really hard. Drilling times seemed to vary by about 2-3 times sometimes on the same route. Also drilled in some very hard quartzite with a newish bosch and that seemed harder and got the bit hotter than anything I had done before. I have done some hand drilling in the Needles on Granite and I always thought the if I were to use the power drill it would to faster because of the larger grains in the granite around here.
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Mungeclimber
Trad climber
sorry, just posting out loud.
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Nov 28, 2011 - 08:09pm PT
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PLEASE Please do NOT buy a drill if you do not know the difference between hammer drill and SDS Rotary hammer. Uncontroled Boschdom can be a real eyesore, political mess and hard to reverse. Please do NOT put up a bunch of crappy routs just because you happen to have a drill. Think Long and hard before placeing any bolts and try to think of the greater good. Is this going to be a 5 star classic that you will want your name attached to or is it a chossheap that was better left untouched? How will this affect access? Is this a squeeze job? Additionaly know your hardware and ONLY use the best equiptment for each situation, rock type, weather conditions, traffic levels. etc. If you do not know what I am talking about Do Not Do IT!!!
yeah Mud, ya friggin bolt happy over bolter!!
ROTFLMAO at Tradman's post. He just doesn't know the mud...
If the mud can lead this and not put any bolts in and has climbed stuff on Knuckle Ridge without excessive bolting, I think we're ok with him owning a bosch.
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tradmanclimbs
Ice climber
Pomfert VT
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Nov 28, 2011 - 08:18pm PT
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You are absoulutly right. I do not know the OP. It is not all that promising though when someone you do not know seems to not know the difference between a rotary hammer and a Hammer drill yet wants to start drilling stone. For all I know the OP is experienced but simply fed up with tendonitus induceing hand drilling. That was my reason for buying a bosch. I do feel that the little blurb that I posted is not a bad list of things to consider when thinking about makeing the move to bolting routs.
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tolman_paul
Trad climber
Anchorage, AK
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Nov 28, 2011 - 08:29pm PT
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It's a bit specious to get hung up on this rotary hammer vs. hammer drill thing. I've seen the terms interchanged over the years, its not like there is some sort of industry standard. You can google either term and come up with tools that are appropriate for the use, and those that are not. Generally if it takes sds bits it's the real deal.
Now if the op is good at nabbing deals on ebay or craigslist, if you come across one of these for a reasonable price
then grab it.
No batteries to need reconditioning, no wondering if the battery has enough juice for one more hole. No slowing down from hole to hole. Drills 1/2" nearly as fast as 3/8".
The only thing I've had to do over the years is rebuild the carb, as the pumper diaphrams dry out when not used regularly. It's a walbro carb and ~$5 for a rebuild kit. Finding the p/n for the kit is the only real bugaboo.
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