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dagibbs
May 22, 2014, 2:57 PM
Post #26 of 33
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Registered: Oct 1, 2007
Posts: 921
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I am using a Hilti TE4-A18 drill and drilling gneiss in the Canadian Shield -- so fairly hard rock. I'm drilling 3/8"x3" holes. I've yet to run-out a charge, since I tire out before the drill does, but after 10-12 holes, the battery indicator still shows 75% power left. I would definitely expect to get 30-40 holes from a single battery charge.
Not an inexpensive drill & setup, but it works very well for me.
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kennoyce
May 22, 2014, 5:24 PM
Post #27 of 33
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Registered: Mar 6, 2001
Posts: 1338
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viciado wrote: FWIW I use a Bosch 11536 which gets about 8 holes per charge.
Wow, what are you drilling? I've got the 11536C, so it's got the smaller "slim-pack" battery, and I easily get over twenty 3/8" x 3 1/2" holes in hard granite on a single charge (I've never actually run the battery all the way to empty so I could certainly get more than that as well).
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JimTitt
May 22, 2014, 5:31 PM
Post #28 of 33
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Registered: Aug 7, 2008
Posts: 1002
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WildIsle wrote: When I was researching Makita cordless SDS drills suitable for climbing anchors this thread came up in my Google search. Unfortunately the posts didn't quite give the full story. Regardless I too a chance and bought a Makita BHR241. As I already had a battery and charger I only needed the bare drill which cost under $250. Turns out this inexpensive but well made drill kicks ass and in the past two months I've drilled over 300 3/8" holes in basalt and granite. I get between 7 to 10 holes per charge and would definitely recommend this model. Incidentally the very similar but slightly smaller BHR202 is the same price but it has a lower power output.
The 202 is shorter but has the same motor so the same power, itīs a newer model so itīs got a light though!
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WildIsle
May 22, 2014, 5:53 PM
Post #29 of 33
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Registered: Mar 23, 2014
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The 202 may have the same motor but it draws fewer amps, 9 as opposed to 11.9 for the 241, you only find this stamped on the tool, it's not mentioned in any of the specs I've seen listed. I'm no electrician but basically I understand that it means the 202 gets more life out of a battery charge but packs less punch.
Good point about the newer model though because Makita's new 4A/hr battery doesn't fit the 241 but it does work with the 202, definitely an advantage. There is a 5A/hr after market battery that does fit the 241 though. I just ordered one I'll post how it performs when I get it.
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JimTitt
May 22, 2014, 6:41 PM
Post #30 of 33
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Registered: Aug 7, 2008
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WildIsle wrote: The 202 may have the same motor but it draws fewer amps, 9 as opposed to 11.9 for the 241, you only find this stamped on the tool, it's not mentioned in any of the specs I've seen listed. I'm no electrician but basically I understand that it means the 202 gets more life out of a battery charge but packs less punch. Good point about the newer model though because Makita's new 4A/hr battery doesn't fit the 241 but it does work with the 202, definitely an advantage. There is a 5A/hr after market battery that does fit the 241 though. I just ordered one I'll post how it performs when I get it.
Interesting, (I did study bits of electrical engineering some time ago) a quick look at the spare parts lists gives the motor components as interchangeable as well as nearly everything else. The switch is different but thatīs to cope with the light connection and I doubt they have some cunning was to reduce the power output through a DC switch. Iīll wander in my local dealer one day and check it out but doubt Iīll buy one anyway, I much prefer the 162RFE!
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viciado
May 23, 2014, 8:09 AM
Post #31 of 33
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Registered: May 9, 2003
Posts: 429
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Kenny, the rock is some "transitional metamorphic stuff" (obviously my geologist friend doesn't know either and the assays/surveys are $$ just to read the first few pages... I don't care enough to pay to know the details.).
The real question may be the age of my 2 batteries that have seen a good bit of use (not always just by me). I have a new one on the way and will see if I get any better performance out of it after a few cycles. I'm happy with the drill with 2 batteries to switch out, but if I get more out of the new one, it's just that bit less weight to drag up the approach!
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kennoyce
May 23, 2014, 3:16 PM
Post #32 of 33
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Registered: Mar 6, 2001
Posts: 1338
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viciado wrote: Kenny, the rock is some "transitional metamorphic stuff" (obviously my geologist friend doesn't know either and the assays/surveys are $$ just to read the first few pages... I don't care enough to pay to know the details.). The real question may be the age of my 2 batteries that have seen a good bit of use (not always just by me). I have a new one on the way and will see if I get any better performance out of it after a few cycles. I'm happy with the drill with 2 batteries to switch out, but if I get more out of the new one, it's just that bit less weight to drag up the approach!
Yeah, it is certainly nice not having to drag two heavy batteries if you can get by with one. I would expect to be able to get a bunch of holes out of the new batteries.
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climbersteve
May 26, 2014, 5:26 AM
Post #33 of 33
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Registered: May 21, 2014
Posts: 1
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I've got a Makita 24V and have just ordered a pair of replacement batteries (3.3 AH aftermarket jobbies) - do you know how they perform compared to the original batteries (I had 2 AH and a 3 AH). I'll be drilling granite in the middle east, so they will have to work in heat >40 degrees C too.
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