A1020638 is an OKW (Okuma) part number, and it is associated with a Linear Guide Model LMU35B Unit, a regulated rotary mechanical device. The LMU35B Unit is designed for positioning accuracy and long-life, making it ideal for a variety of applications, such as medical, packaging, and robotics. The unit is constructed from hardened and ground stainless steel. It features two ball rails that slides on two rows of balls and provides smooth and accurate linear travel. It also features a low profile, low noise design, with a dust and water-resistant structure. The unit also comes with a wide choice of preloading options and easy installation.