NB SMA25GWUU 25mm Double-Wide Linear Ball Bushing Pillow Block 2-5/8" Long

NB SMA25GWUU 25mm Double-Wide Linear Ball Bushing Pillow Block 2-5/8" Long

The NB SMA25GWUU is a double-wide open-type pillow block housing a 25mm linear ball bushing, made in Japan by NB (Nippon Bearing). The double-wide configuration provides a longer contact length along the shaft compared to a standard single-wide unit, which increases load capacity and moment resistance. The aluminum housing mounts via four bolts and accepts a round linear shaft of 25mm diameter, allowing smooth, low-friction linear travel along the shaft axis.

Specifications & What's Included

• Model: NB SMA25GWUU
• Type: Linear Ball Bushing Pillow Block — Open Type, Double-Wide
• Shaft Diameter: 25mm
• Length: 2-5/8" (approx. 66.7mm)
• Housing Material: Aluminum
• Ball Retainer: Steel, visible in bore
• Mounting: 4-bolt top-face pattern (four holes visible on underside)
• Country of Manufacture: Japan
• Unit only — no additional accessories included

Applications

Linear ball bushing pillow blocks like the NB SMA25GWUU are standard components in precision linear motion systems. They are used in CNC machines, automated assembly equipment, semiconductor handling systems, pick-and-place machines, and general industrial automation wherever a guided linear axis is required. NB (Nippon Bearing) is a Japanese manufacturer with a long history in precision linear motion components, and their SMA series pillow blocks are a common choice for machine builders and maintenance engineers working with 25mm shaft systems. The double-wide format is selected when the application demands additional rigidity against moment loads — for example, on cantilevered axes or where the load point is offset from the bushing centerline. These units are still in active production and wide use in precision machinery today.