STANDARD FEATURES:

• Swivel load bearing - independent 7" dia. precision hardened thrust bearing unit keeps balls properly aligned and provides superior swiveling ability and long life; top plate skirt design protects bearing from contamination
• Secondary load bearing - 1 1/4" precision tapered roller bearing
• Finished in matte black paint
• Top plate: 1" thick, high strength steel with integral king bolt, precision machined; Rigid caster top plate is 5/8" thick
• King pin: 1 1/4"dia. king bolt is integral with top plate, precision machined and equipped with slotted nut for precise adjustment
• Fork legs 1/2" thick, 4" wide steel, welded inside and out for extra strength
• Axle and wheel bearing - tapered roller bearings 1 1/4" dia. run directly on 1 1/4" dia. axle fitted with slotted nut for precise alignment of tapered bearings 
• Fork leg spacing - 4 1/2" 
• Lubrication fittings in swivel and wheel 
  OPTIONAL FEATURES:
• 4-position swivel lock, factory installed
• Wheel brake - factory-installed thumb screw type

Series 151 casters are designed for extreme heavy duty applications; these casters combine free swiveling, long life, and trouble free performance some of the most rugged casters available.