BENEFITS:  The 71 series is Caster Concepts heaviest offering in the fabricated single ball race caster.  High alloy steel tubing is precisely cut and machined into precision raceways, which are then robotically welded to the top plate.  The inner raceway is welded both inside and outside for superior strength.  The fabrication of the top plate swivel section allows Caster Concepts to vary the top plate sized to meet various competitive top plate options.  These casters are very well suited for medium duty towing applications where shock loads are present. The swivel raceway is through hardened for strength and toughness.  These casters are offered with swivel locks and brakes (consult Mapp Caster sales rep).  The swivel section is sealed as a standard.