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Technology Factsheet

Paint Scaler-Bosch Rotary Hammer Drill

Category: Decontamination > Mechanical Surface Removal > Chipping/Chiseling
Reference # : OST No 2952 , DOE/EM 0540 Model No : 11225VSRH

The Bosch 1125VSRH is a 24 Volt-battery operated, _" rotary hammer drill. It was selected for this demonstration because it is battery operated. This makes this unit more versatile than other cord-powered units. It gives the operator more flexibility during sampling activities than an electric or air powered paint scaler would allow.The unit is powered by a 3.0 amp-hour, 24-volt battery that has a 26-minute recharge time. The battery has a gauge that displays five stages of charge levels. It illuminates with the tool on or off.The standard Bosch rotary hammer has two modes of operation: drill and hammer-drill. However, when used with an optional chipping adapter, the 11225VSRH can operate in a hammer-only mode. This is used to perform light chiseling or chipping tasks. The unit is small and light enough that it can easily be operated at waist level and below or at chest/shoulder height. This unit also has a variable speed trigger, which is helpful in collecting delicate or thin-coated samples. A variety of SDS bits and chisels can be used with the 11225VSRH. During this demonstration, the following chisels were used. ú Point Chisel (10-in. long)ú Chisel (3/4-in. wide x 10-in. long)ú Wide Chisel (1-1/2-in. wide x 10-in. long)ú Wood Chisels (1/4-in., 1/2-in., 3/4-in. and 1-in. wide)Specific features of the 11225VSRH Bosch rotary hammer include the following:ú Battery operated -no cords or hose required for operation. Eliminates potential contamination of cords.ú 3 amp-hour battery provides a long running time between recharges.ú Battery gauge displays charge level.ú Easy to use and set up.ú Variable speed trigger allows sampling of thin or delicate material.ú ALARA dose reduction resulting from quick sample collection.Reduces worker fatigue during sampling activities.Works with a variety of bits or chisels.Can collect thick or hard-to-remove samples easier.

Benefits

The innovative technology was 2 to 5 times faster than the baseline technologies in removing material for sampling. The innovative technology is versatile; it can be used on both metal and concrete surfaces. Worker fatigue was greatly reduced when using the innovative technology. The innovative technology can remove hard, thick coatings much easier than the baseline echnology.ú The innovative technology minimizes the time required to collect samples, thus reducing worker exposure in radiological environments. The innovative technology reduces the amount of substrate that is inadvertently collected with the coating sample. The innovative technology reduces the possibility of personal injury associated with the use of hand tools. Cost reductions and accelerated schedules are possible because more samples can be taken in a shorter period of time.

Limitations

The Bosch rotary hammer performed well during this demonstration. There were no significant technology limitations. Bosch makes other accessories to use with the rotary hammer; one in particular is an “Air Sweep Dust Extraction Fixture”. Using a vacuum system attached to this fixture it may be possible to use this device for collecting the sample as it is being removed from the surface.

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