A ‘Rotary Hammer’, also known as ‘Hammer Drill’ or ‘Roto-Drill’ is a rotary drill with a hammering action. This is a kind of power tool, where the hammering action provides a short, quick hammer thrust to crush relatively brittle material and provide rapid drilling with less effort. These tools are commonly electrically powered with a long wire.
The working action of the Rotary hammer is that, the drill bit pounds in & out while it is spinning, using a piston mechanism instead of using a special clutch. This causes them to deliver a much powerful hammering blow, making it easy to drill bigger holes faster.
For drilling holes an extra solid shank is required, the commonly used shanks are SDS+ (Slotted Drive System), SDS-MAX and Spine Shank. These shanks allow the bit to slide back and forth smoothly so that the drill bit can efficiently deliver the force of the electro-pneumatic hammering action to the working surface.
The Rotary hammer can also be used for small chipping jobs, by switching off the rotary action & just making use of percussion force.
The Advantages Of Rotary Hammer
1. Capable of drilling through the consolidated material.
2. Make straighter or cleaner holes.
3. A motor-driven piston provides a more intense hammering action.
4. Drills at a much faster drilling rate.
5. Has superior strength and shock-absorbing qualities.
The Applications Of Rotary Hammer
1. In drilling holes in rocks, big stones.
2. In demolishing the concrete walls.
3. Electrical applications such as drilling holes for lighting systems, junction boxes.
4. In construction sites for making holes.
5. Masonry works such as chipping jobs.
6. Civil works such as road construction or repairing.