1. Product Overview W211PPB5 heavy-duty agricultural spherical OD insert bearing adopts 1-3/8 inch round straight bore, matched to medium-large disc harrows and deep tillage equipment. Double-sided integrated tri-ply triple-lip metal shroud composite seals block mud, crop straw, sand and field water splashes. Spherical outer ring provides ±2.5° self-alignment to compensate shaft and hub assembly offset. Sealed-for-life pre-filled special anti-wear farm grease, no grease