SKF 6318-2Z Metal Shielded Single Row Deep Groove Ball Bearing 90x190x43mm

The SKF 6318-2Z shielded deep groove ball bearing provides high-capacity rotational support for large industrial shafts and machinery operating under significant mechanical loads. Its 90mm bore, 190mm outside diameter and 43mm width place it within SKF's robust 63 series. The single row deep groove raceways support predominantly radial loading while accommodating axial forces in both directions within the bearing's rated capacity. SKF specifies a basic dynamic load rating of 151kN and a basic static load rating of 108kN, making these values important for bearing-life calculations and assessing operating loads. The SKF Explorer design uses a sheet steel cage to separate and guide the rolling elements. Correct shaft alignment and suitable housing support are essential for achieving reliable service in larger rotating assemblies.

The 2Z designation identifies non-contact metal shields on both sides, rather than the rubber contact seals used on 2RS1 bearings. These shields help retain the factory grease and reduce the entry of larger airborne contaminants while avoiding rubbing contact with the inner ring. They are therefore appropriate for relatively clean industrial environments where lower sealing friction is desirable. SKF lists a 3,800rpm limiting speed for this configuration, alongside a 7,500rpm reference speed; these figures serve different purposes and should not be treated as interchangeable operating limits. Normal (CN) radial internal clearance must be distinguished from the increased clearance of a 6318-2Z/C3. For replacements, verify the complete designation, shaft and housing fits, lubrication requirements and operating environment before installation.

Typical Applications:

Large industrial electric motor assemblies

Industrial fans and ventilation equipment

Centrifugal pumps and rotating process machinery

Heavy-duty conveyor drive systems

Industrial gearboxes and power transmission equipment