The 250 mm insulated cast iron sleeve bearing (compatible with bearing numbers 6228 and 6323) features an outer diameter of approximately 259 mm (10.197 inches) with a tight tolerance of ±0.05 mm and a sleeve length of 110 mm. This bearing sleeve is designed for heavy-duty applications, providing electrical insulation to protect against eddy currents and bearing fluting. Its cast iron construction ensures durability and strength, while the insulation enhances motor reliability. The sleeve is ideal for use in large motors where bearing protection from electrical damage is critical, combining robust mechanical properties with electrical isolation.