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91HD Series Casters – 20,000 Lbs Max Capacity – 8.5 x 8.5 Top Plate – Kingpinless

The 91HD Single Ball Race Caster is engineered to meet the demands of manufacturing, automotive, aerospace, defense, marine, and modular construction industries with an impressive 25,000 lb. capacity, reinforced frame, and a maintenance-optimized design that delivers long-lasting performance in the most punishing environments.

This newest addition to Caster Concepts’ lineup fills a need for higher weight capacities without the need for a bigger caster in heavy-duty applications requiring superior strength and reliability.

The 91HD caster is available in single and dual wheel configurations, offering an uncompromising solution for customers looking to minimize caster failure and reduce downtime and maintenance costs.

91 Series Kingpinless Caster

Overview

Engineered for demanding industries requiring high capacity mobility, the 91HD Caster solves common caster challenges with a purpose-built design that prioritizes strength, safety, and long-term durability.

  • Enhanced Capacity & Ergonomic Swivel

The 91HD handles up to 25,000 lbs. per caster, with a unique swivel section that places the ball bearing in a shear load configuration that offers greater strength and reduces push force when swiveling under load. This reduces operator fatigue and supports safe, ergonomic material handling.

  • Reinforced for Extreme Loads

The raceway and yoke are heat treated to a higher Rockwell standard, offering superior resistance to wear, impact, and deformation. Reinforced legs and platform construction ensure safety and stability under extreme loads.

  • Maintenance-Optimized Design

Reduce downtime with easy maintenance features: a Zerk fitting lubrication point makes greasing simple, while the Shielded Swivel Bearing protects against contaminants that lead to failure—keeping your operations moving with less maintenance and fewer breakdowns.

Application

The 91HD Caster is ideal for environments where reliability under stress is required. From massive tooling carts to mobile structures, this caster is trusted for heavy-duty performance.

Heavy Manufacturing Equipment

  • Support carts for massive tooling, weldments, or press components
  • Handling solutions in debris or impact-prone areas

Aerospace & Defense

  • Transport of large-scale components such as fuselage frames, sensitive satellite assemblies, or armored systems
  • Heavy mobile fixtures in maintenance and testing applications

Automotive Assembly

  • Movement of EV battery modules, chassis carts, or engine carriers
  • Assembly carts requiring maximum strength and controlled movement

Marine & Modular Construction

  • Casters for mobile support platforms, boat frames, or modular building components
  • Ensures safe movement of extremely heavy structures across uneven or confined surfaces

Custom CAD

Options

Caster Concepts has a wide variety of caster options. Many of these not only improve function – but also provide safety and add longevity to the product. When considering safety options, the most common consideration would be caster locks, caster brakes, toe guards, and reinforced legs. Options that extend the life of a caster are primarily options that seal the bearing of the caster to prevent contamination of the precision parts.

Other options include threaded zerks for when an application is difficult and high level of maintenance is required and track brush wipers that keep debris from stopping movement or damaging a wheel. These options can be added at the time of manufacturing or after the caster is fully assembled.


Brakes


Locks


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