Which type of drill does not activate the hammering function until pressure is applied to the bit?

The hammer drill is specifically designed to generate a hammering action that assists in drilling into hard materials, such as concrete or masonry. This tool has a unique mechanism that allows the hammering function to engage only when pressure is applied to the bit. This feature is crucial because it prevents excessive wear on the tool and provides better control to the user, allowing for more accurate drilling.

In contrast, a rotary drill operates by spinning the bit without the added hammering action, while a pneumatic drill uses compressed air to perform its functions, and a right-angle drill is designed for use in tight spaces without a hammering function. The specialized design of the hammer drill allows it to effectively combine rotary movement and impact action, making it ideal for heavy-duty applications.