hammer Drills - Page 2 - Contractor Talk - Professional Construction and Remodeling Forum

jiffy · 05-16-2009, 11:53 AM

I wouldn't pay the high cost of the Hilti. I use a Makita that does the job just as good at a fraction of the price. This size Rotary Hammer is perfect for what size holes you drill and it is an extended shape so you don't have to bend over as far to use it.

http://www.toolbarn.com/product/makita/HR2455/

KennMacMoragh · 05-16-2009, 12:50 PM

Those look nice

The motor is slightly smaller than the big ones though, wonder if it would have the power for old concrete.

Anti-wingnut · 05-16-2009, 12:52 PM

First of all, if efficiency is your priority, you should not be using a hammer-drill. The proper tool is a roto-hammer. A hammer drill is for minor concrete drilling, and more typically drilling mortar and masonry. It hits lightly, at a very high RPM, and uses a standard heavy duty chuck. A comparably sized roto-hammer hit with much more impact at a lower RPM, with a specialized chuck system, typically SDS on the smaller units.

A Hilti TE-6 or similar sized tool would probably work fine for you

KennMacMoragh · 05-16-2009, 01:01 PM

I wondered why he called it that. Some of the newer ones they call a rotary hammer drill, so they combine the names hammer drill and roto-hammer. I call them whatever I feel like, it's the size, power, rpm, and type of drive that matters.

Gilby · 05-16-2009, 03:09 PM

I really like the old TE-5 them were nice I just dont know if they make them as nice anymore

Inner10 · 05-17-2009, 10:11 AM

Quote:

I wondered why he called it that. Some of the newer ones they call a rotary hammer drill, so they combine the names hammer drill and roto-hammer. I call them whatever I feel like, it's the size, power, rpm, and type of drive that matters.

I agree, there is alot of different termonology accross different areas and no sense arguing about semantics.

I check my hilti catalogue and the TE-2 is the only one optomised for 3/16-1/2" holes. My old 20 would have a pretty healthy diet of 3/16 bits if I were to use it for hundreads of holes. I've borrowed a similar bosch bulldog and it worked as well as my TE-2.\

Apart from using something like direct fastening, I'm stumped as to what would go any faster.

Quote:

A Hilti TE-7 with the optional dust extraction system will solve your problem.

I've seen it in action and it cuts down on mess but it wouldn't prevent clogging in the groves of the bit 5" into concrete. The little holes never clear out well, i guess they can't put deep groves in the bit or else it would snap too easy.

KennMacMoragh · 05-17-2009, 02:47 PM

Quote:

Originally Posted by Inner10

I check my hilti catalogue and the TE-2 is the only one optomised for 3/16-1/2" holes.

Those are tiny, and the rpm is higher is why they're made for small holes. Maybe that's the problem he's having is just the rpm's though.

maninthesea · 05-17-2009, 07:15 PM

Couple of my good friends are Roofing contractors for Navy and Air Force over here and ALL the buildings and roofs are concrete. They generaly have to install Stainless flashing around the roof edge with 1/4" stainles anchors every foot plus putting in the safety railings and they have a fleet of Bosch Bulldogs. I have inherited a couple of broken but fixable ones I and I love them. I would recomend going with the "extreme" model. I agree that you are pretty much stuck with backing them out to clear the dust while you are drilling the hole. It does not bother me but then I am only drilling 20-30 holes for an entire job.

platinumLLC · 05-18-2009, 07:24 AM

When I worked for a commercial company we had mostly hilti te-5 drills. We put in alot of suspended ceilings and when we couldn't shoot the hanger wires in we had to drill them. Mostly 1/4" holes and the hilti handled it great. It was a big company and we had a couple hundred of them among the guys. You can't beat hilti's repair and warrenty service.