The needle bearing in a 2-26 rotary hammer (such as the Bosch GBH 2-26) is a small, but crucial component that supports rotating parts within the machine, particularly in the gear and drive system. Needle bearings are a type of roller bearing with thin, cylindrical rollers (needles) that reduce friction between moving parts.

Here’s how the needle bearing functions in the rotary hammer:

Supports Rotational Movement: The needle bearing is usually positioned around the rotating shafts in the hammer’s motor or gear assembly. It allows smooth and efficient rotation by reducing friction between the shaft and the surrounding housing or other components.

Durability Under Heavy Loads: Because rotary hammers are used in heavy-duty applications (drilling into concrete, masonry, etc.), the needle bearing helps distribute loads more evenly and withstands higher pressure. This makes the machine more durable and prolongs its operational life.

Minimizes Wear and Tear: By reducing friction between moving parts, the needle bearing helps prevent excessive wear on components like shafts, gears, or the motor. This not only enhances machine efficiency but also reduces the need for frequent maintenance or part replacements.

Enhances Hammer Performance: With efficient bearings, the machine can maintain higher rotational speeds and smoother operation, leading to better performance when drilling or chiseling.