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2. Impact wrench - Wikipedia

   en.wikipedia.org/wiki/Impact_wrench

   Compressed air is the most common power source for impact wrenches, [citation needed] providing a low-cost design with the best power-to-weight ratio.A normal vane motor is almost always used, usually with four to seven vanes, and various lubrication systems, the most common of which uses oiled air, while others may include special oil passages routed to the parts that need it and a separate ...

3. Hammer drill - Wikipedia

   en.wikipedia.org/wiki/Hammer_drill

   German company Bosch produced the first "Bosch-Hammer" around 1932 in mass production. The US company Milwaukee Electric Tool Corporation states that in 1935, it was selling a lightweight 1 ⁄ 4 in (6.4 mm) electric hammer drill (cam-action). [15] Hand-cranked percussion drills were made in the UK in the mid-twentieth century. [16]

4. Chicago Pneumatic - Wikipedia

   en.wikipedia.org/wiki/Chicago_Pneumatic

   In 1970, the CP611 impact wrench was used in the steel erection phase of the World Trade Centers (New York City). Sold for several years into industrial markets, CP torque impact wrenches were introduced in the 1970s into the automotive market. In 1987, Chicago Pneumatic became part of the Swedish conglomerate Atlas Copco. During 1988, more new ...

5. Bosch (company) - Wikipedia

   en.wikipedia.org/wiki/Bosch_(company)

   In 1927, Bosch launched injection pumps for diesel. Bosch bought the gas appliances production from Junkers & Co. in 1932, as a part of a diversification strategy. In 1932, the company developed its first electric drill and presented its first car radio. In 1933, Bosch presented its first electric refrigerator for private households. [7]

6. Power wrench - Wikipedia

   en.wikipedia.org/wiki/Power_wrench

   A power wrench is type of wrench that is powered by other means than human force. A typical power source is compressed air . There are two main types of power wrenches: impact wrenches and air ratchet wrenches or pneumatic ratchet wrenches .

7. Drill - Wikipedia

   en.wikipedia.org/wiki/Drill

   Impact drills come in two major types, pneumatic and electric, and vary in size depending on application. Electric impact drills are most often found cordless and are widely used in construction, automobile repair, and fabrication. These electric drills are preferred over the pneumatic driven because of their maneuverability and ease of use.