Hi Chalres,
I'm not familiar with your application but I have experiences with hammer drills (like the Bosch 1194 VSR) and rotary hammer drills (like the Bosch 11234VSR).
I can assure you that a rotary hammer drill works a lot better in concrete than a normal hammer drill. The reason is that modern rotary hammer drills use pneumatic technology to produce the beat while hammer drills work with mechanic technology.
Speaking of rotary hammer drills, there are basically two different chuck systems:
- SDS plus (for smaller dia holes, basically up to 26 mm = about 1")
- SDS max (for larger holes)
Simple SDS is no longer made as far as I know, and different systems are hardly ever used, maybe on large demolition hammers mainly from Makita, Hitachi, Kango
IMO the most versatile tool is a rotary hammer drill with a two speed gear box. They can be used for drilling, hammer drilling and driving. For example: Hilti TE 2M
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UHE 22 Multi Availabel at
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for example. Metabo UHE 28 Multi The Metabo's are even more useful because they can be used for small chiseling jobs, too.
I consider both brands to be excellent quality, Hilti is industrial standard here but I think you'll be more than satisfied with a Metabo as well.
Personally, I use an (30 year-old) AEG hammer drill, a Kress hammer drill and a Hilti TE 12S rotary hammer (old model too).
Regards,
Christian Aufreiter, Austria