SKF SNW18x3-3 16 Adapter Sleeve

SKF SNW18x3-3/16 Adapter Sleeve is a tapered-bore mounting accessory from the SNW series that lets you mount selected spherical roller bearings onto a shaft with precise axial and radial alignment. It carries a 3.1875 in bore and an overall length of 67.21 mm, with a 1:12 taper that aligns with standard SKF SNW sleeves for reliable seating of bearings on shafts. The sleeve uses a 3.527-12 thread and accepts a lock-nut system with AN18 lock nut and W18 lock washer, complemented by a HMVC 18E hydraulic nut in compatible assemblies. The lock nut outside diameter is 4.6610 in, and the assembly is made from steel, weighing about 3.08 lb. This SNW sleeve is specified for bearings 1218, 1318, and 22218, supporting shaft diameters that match the bore and providing a stable, self-centering fit for heavy machinery applications. Originating in the United States, SKF’s SNW adapters are widely used in industrial drives, conveyors, and machinery where precise bearing seating and quick mounting/dismounting are required. The 3-3/16 size (SNW18x3-3/16) aligns with standard bearing codes in the 1218/1318/22218 families, enabling consistent interchange with SKF and authorized distributors.