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Hamilton Maxi-Duty Dual Series – Super Duty

Capacity Range: 4500 – 16,000 lbs.

The Dual-Wheel Maxi-Duty Caster series delivers high load capacity on resilient tread wheels while maintaining a low overall height. Designed for stability, these casters swivel effortlessly, minimizing the “scrubbing” effect of soft treads on floors through differential action—outperforming wider single-wheel designs. Featuring precision-crafted main load and secondary thrust bearings, paired with Hamilton’s HPI™ Swivel Technology, this series ensures smoother swiveling, extended durability, and reliable performance in demanding applications.

Hamilton Maxi-Duty Dual Series – Super Duty

Capacity Range: 4500 – 16,000 lbs.

The Dual-Wheel Maxi-Duty Caster series delivers high load capacity on resilient tread wheels while maintaining a low overall height. Designed for stability, these casters swivel effortlessly, minimizing the “scrubbing” effect of soft treads on floors through differential action—outperforming wider single-wheel designs. Featuring precision-crafted main load and secondary thrust bearings, paired with Hamilton’s HPI™ Swivel Technology, this series ensures smoother swiveling, extended durability, and reliable performance in demanding applications.

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MDD Series Features & Specs.

  • Swivel Construction
    5/8″ thick drop forged steel mounting plate (rigid plate 1/2″ thick); outer legs 3/8″ x 5″ precision laser cut steel continuously welded inside and outside to forged steel horn base (center leg 3/8″x 2″)
  • Kingpin
    1 1/4″ dia. integrally forged with mounting plate guaranteed for life, prevents bending or breaking; threaded for 1 1/4″ slotted nut secured by roll pin for positive locking.
  • Main Load Bearing
    HPI™ thrust bearing with outside diameter of 7 1/2″; raceways hardened to 58-62HRC and ground to surface finish 16 micro inches.
  • Secondary Load Bearing
    1 1/4″ precision tapered thrust bearing counteracts radial thrust.
  • Product Finish
    Powder Coated – Caster rigs are powder coated with Hamilton’s Platinum Powder, a metallic HAA Polyester providing a premium look and excellent durability for both interior and exterior environments.
  • Axle
    1 1/4″ diameter grade 5 hex head with slotted nut and cotter pin.
  • Lubrication Fittings
    Ball-check type in swivel assembly and in wheel hubs with tapered or straight roller bearings.

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