Injection molding machines produce plastic components by heating plastic pellets until they melt, then injecting the molten plastic into a mold. Once cooled, the plastic solidifies into the desired shape.
Ball screws are critical to this process, converting rotary motion into precise linear movement in both the injection and clamping units. They must withstand high axial loads and rapid acceleration, placing significant demands on the angular contact thrust bearings that support their rotation. Bearing locknuts play a vital role in axially locating these bearings and applying the correct preload. If they loosen, system rigidity is compromised, leading to misalignment, vibration, and premature bearing failure.
The HARDLOCK® bearing nut is widely used by leading injection molding machine manufacturers in Japan. Typically mounted on the drive-side bearing, it provides superior locking performance compared to conventional bearing locknuts, maintaining alignment over time. This contributes to improved machine reliability, consistent product quality, and extended maintenance intervals—enhancing both operational efficiency and cost-effectiveness.