Thread: That's not a cordless drill............

When you're in the building trades having a big cordless rotory hammer like that comes in handy. Sure beats running leads out just for a couple of holes.

Almost big enough for use in a quarry.

What are prices like??

Hi all,

as you can see from the "gear box sections" (comprising pneumatic hammering and rotary drive), these drills belong to the typical 2 to 3 Joule-per-blow class. In fact they are gear boxes belonging to mains driven pneumatic hammers, coupled to battery motors and batteries large enough to meet the expected results from this class of well known and trusted mains driven machines.

Bosch started out with this class (solely mains driven at the time) in 1982, with the model UBH2-14SE (Universal Bohrhammer from 2 up to 14 mms, with Safety clutch and Electronics), which set the standard for the most widely used hammer drill type in the building trade. Electricians use them to dowel cable fixtures into concrete, plumbers use them likewise to mount tubing along walls and ceilings. These are by far the most sold and used pneumatic hammer drills for both DIY and trade. The current Bosch GBH24 still looks very much the same, as do the Makita and Duss and Hitachi and Kress and AEG and Hilti equivalents.

In many cases these drills are used many hours throughout the day to make series of holes all over the jobsite. So there's no way to skimp on the drive system and no way to skimp on the battery bulk either, as both efforts to skimp will let the tool's endurance and competitiveness with corded machines down. That's why they look like normal 2 kg pneumatic hammer drills, and they actually perform as such.

The pic below: the introductory version of the Bosch UBH2-14SE, the first few thousand of which were made in a red livery to draw attention to them. Bosch has used red more often to enhance new developments. As you see, the gearbox shape set the standard that is still visible in these heavy duty battery trade tools.

Greetings

gerhard