NSK 6309ZZ Deep Groove Ball Bearing

The NSK 6309ZZ Deep Groove Ball Bearing is a medium-duty single-row radial ball bearing with a 45 mm bore, 100 mm outer diameter, and 25 mm width, designed for applications requiring a higher radial load capacity than the lighter 62-series while maintaining the compact envelope of a standard open-frame ball bearing design. The double steel shield configuration retains the factory grease charge and provides effective contamination exclusion in industrial environments where regular regreasing is not feasible or practical. NSK produces the 6309ZZ to ISO dimensional standards with case-hardened high-carbon chromium steel rings and balls, heat-treated to deliver a dynamic load rating of 52.7 kN — making it well suited to the heavier electric motors, blower fans, and pumping equipment common in Saudi industrial facilities.

The 6309ZZ is widely specified for medium-power induction motor bearings in the 15–55 kW range, which represents a large proportion of general purpose motors in Saudi process plants. Maintenance engineers at SABIC petrochemical facilities in Jubail Industrial City regularly hold 6309ZZ bearings in plant stores for planned maintenance shutdowns, given the high density of process pump motors and conveyor drives in the 22–37 kW range that use this bearing size. The bearing is also commonly found in centrifugal blower and exhaust fan shafts in industrial ventilation systems across Saudi manufacturing zones, where the higher load rating compared to the 6209ZZ provides a longer maintenance interval under continuous operation.

Saudi cement plant maintenance teams at Saudi Cement, Qassim Cement, and Eastern Cement specify the 6309ZZ for auxiliary electric motor bearings across their clinker production and grinding lines, where the harsh cement dust environment makes the double-shield contamination protection a primary specification requirement. At SWCC desalination plants, the 6309ZZ is used in booster pump motor bearings where salt-laden air accelerates corrosion of unprotected open bearings. Razz Middle East supplies NSK 6309ZZ bearings from Saudi Arabian Sourced to order with full NSK original packaging and, upon request, third-party inspection certificates for ARAMCO- or SABIC-regulated procurement channels.

Razz Middle East's engineering team is available to advise on bearing fit tolerances, housing selection, and lubrication compatibility for 6309ZZ replacement applications in Saudi plants. We offer same-week delivery to all major Saudi industrial centres including Dammam, Al Khobar, Jubail, Riyadh, Jeddah, and Yanbu from our in-kingdom inventory positions.