In pump applications, which two bearing types are commonly present?

In pump applications, which two bearing types are commonly present?

• A. Sleeve bearings and Ball bearings
• B. Sleeve bearings and Bushings
• C. Ball bearings and Bushings
• D. Bronze bearings and Bushings

Answer: (A)

In pump shafts, you typically need support for radial loads and, in many designs, some axial guidance as well. Bearings come in two broad families: plain (sleeve) bearings and rolling-element bearings. A common arrangement uses a plain sleeve bearing to provide smooth, low-wear radial support and good damping in oil, paired with a ball bearing that can handle higher radial loads and help keep the shaft well aligned and rigid at speed. This combo leverages the strengths of both types: the sleeve bearing offers durable, forgiving operation in lubrication, while the ball bearing offers higher load capacity and stiffness for precise alignment. The other options mix items that aren’t distinct bearing types in the same way, or rely on materials rather than separate bearing classes, so they’re not as representative of typical pump configurations.

In pump shafts, you typically need support for radial loads and, in many designs, some axial guidance as well. Bearings come in two broad families: plain (sleeve) bearings and rolling-element bearings. A common arrangement uses a plain sleeve bearing to provide smooth, low-wear radial support and good damping in oil, paired with a ball bearing that can handle higher radial loads and help keep the shaft well aligned and rigid at speed. This combo leverages the strengths of both types: the sleeve bearing offers durable, forgiving operation in lubrication, while the ball bearing offers higher load capacity and stiffness for precise alignment. The other options mix items that aren’t distinct bearing types in the same way, or rely on materials rather than separate bearing classes, so they’re not as representative of typical pump configurations.