SUPER, Ball Bushing Bearing Pillow Block, 0.250, Self-Aligning, Closed Type, Non-Adjustable, Corrosion Resistant, Integral Double Acting Seals. SPB4-CR Super Ball Bushing bearing is self-aligning, lightweight and adjustable with a low coefficient of friction. The wear-resistant, engineered-polymer retainers and outer sleeves reduce inertia and noise in critical, high speed applications. When installed in an adjustable housing, the Super Ball Bushing Bearing may be adjusted to a specific diametrical fit-up for accurate and repeatable movement. You can download the product's 3D model below.