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  2. Rotary hammer - Wikipedia

    en.wikipedia.org/wiki/Rotary_hammer

    Modern units allow the hammer and rotation functions to be used separately or in combination, i.e., hammer mode, drill mode, or both. When used in the hammer mode, the tool provides a drilling function similar to a jackhammer. [4] Rotary hammer drills have an oil filled gearbox, which allows them to operate durably despite the large forces and ...

  3. M3 submachine gun - Wikipedia

    en.wikipedia.org/wiki/M3_submachine_gun

    The M3 was commonly referred to as the "Grease Gun" or simply "the Greaser", owing to its visual similarity to the mechanic's tool. [13] The M3 was intended as a replacement for the Thompson, and began to enter frontline service in mid-1944. By late 1944, the M3A1 variant was introduced, which also saw use in the Korean War and later conflicts.

  4. Drill - Wikipedia

    en.wikipedia.org/wiki/Drill

    A heavy duty rotary hammer drill. Rotary hammer combines a primary dedicated hammer mechanism with a separate rotation mechanism, and is used for more substantial material such as masonry or concrete. Most electric hammer drills are rated (input power) at between 600 and 1100 watts.

  5. Hammer drill - Wikipedia

    en.wikipedia.org/wiki/Hammer_drill

    A corded hammer drill next to a drill bit and a chuck key. A hammer drill, also known as a percussion drill or impact drill, is a power tool used chiefly for drilling in hard materials. [1] [2] It is a type of rotary drill with an impact mechanism that generates a hammering motion.

  6. Rotary tool - Wikipedia

    en.wikipedia.org/wiki/Rotary_tool

    A pneumatic die grinder with a right-angle head. A cordless battery-powered rotary tool used for light tasks. A die grinder or rotary tool is a handheld power tool and multitool used for grinding, sanding, honing, polishing, or machining material (typically metal, but also plastic or wood).

  7. Jackhammer - Wikipedia

    en.wikipedia.org/wiki/Jackhammer

    An electropneumatic hammer is often called a rotary hammer because it has an electric motor, which rotates a crank. The hammer has two pistons – a drive piston and a free-flight piston. The crank moves the drive piston back and forth in the same cylinder as the flight piston. The drive piston never touches the flight piston.

  8. Biden signs executive order aimed at school shooting drills ...

    www.aol.com/biden-sign-executive-orders-aimed...

    The actions come as President Biden seeks to cement his legacy of addressing gun violence following the passage of the Safer Community Act, the most significant gun control legislation passed in ...

  9. Hilti - Wikipedia

    en.wikipedia.org/wiki/Hilti

    In 1967 the company introduced the TE17, a fully electropneumatic rotary hammer drill which featured a safety clutch, and it was shipped to customers in Hilti's first distinctive red toolbox. The global expansion continued throughout the 1960s and by 1971, Hilti's global turnover was 376 million Swiss francs across 45 countries, including new ...