The surface for packing rings to bear against is called the

The surface for packing rings to bear against is called the

• A. bearing cap
• B. gland
• C. seal surface
• D. shaft sleeve

Answer: (D)

The packing rings in a stuffing box need a smooth, wear‑resistant surface to bear against so they can seal around the rotating shaft. That surface is the shaft sleeve, a hardened liner around the shaft that provides a consistent bearing surface for the packing. The gland’s job is to compress the packing, not to serve as the surface the rings bear against, and bearing cap is related to bearings rather than packing interactions. So the surface packing rings bear against is the shaft sleeve.

The packing rings in a stuffing box need a smooth, wear‑resistant surface to bear against so they can seal around the rotating shaft. That surface is the shaft sleeve, a hardened liner around the shaft that provides a consistent bearing surface for the packing. The gland’s job is to compress the packing, not to serve as the surface the rings bear against, and bearing cap is related to bearings rather than packing interactions. So the surface packing rings bear against is the shaft sleeve.