WR11871 is ball‑roller type integrated water pump shaft bearing without separate inner ring. Raceways are directly machined on the solid shaft. It adopts one‑piece outer ring with OD 30mm, double‑sided rubber contact seals and pre‑filled high temperature grease. Compact structure supports combined radial and axial loads, designed for high‑speed continuous operation of automotive engine cooling water pumps.

• Ball‑roller combined structure improves load capacity and rigidity
• No independent inner ring for compact radial installation space
• Integrated one‑piece outer ring ensures high running accuracy
• Double contact rubber seals block coolant and dust intrusion
• Pre‑filled high temperature grease for long service life
• Good performance under high speed and fluctuating working temperature
• Complete assembly ready for direct press‑in installation

• Automotive engine cooling water pumps
• Vehicle cooling system replacement parts
• Light commercial vehicle water pump assemblies
• Automotive after‑market repair components

• Q1: What is the structural feature of WR11871 bearing? A1: It is ball‑roller water pump shaft bearing, raceways are directly processed on shaft, no separate inner ring.
• Q2: Can I replace only inner ring for this bearing? A2: Not possible. Shaft and rolling raceway are integrated, whole assembly needs replacement when damaged.
• Q3: What working temperature can WR11871 withstand? A3: Operating temperature ranges from ‑40℃ to +120℃ for automotive cooling system environment.
• Q4: Does this bearing need additional greasing during assembly? A4: It is pre‑greased at factory, no extra lubrication required for normal application.
• Q5: What is the installation method for this water pump bearing? A5: Press‑in installation is recommended, avoid hammer striking directly on shaft surface.