A-Line Series Casters

Individual A-Line casters handle approximately 300 lbs to 1,250 lbs depending on wheel diameter, wheel material, and bearing type. For a four-caster setup, total load capacity can exceed 4,000 lbs. Always calculate per-caster load as total weight divided by three (not four) to account for uneven weight distribution.

Polyurethane wheels are the most popular for smooth concrete floors because they combine load capacity with floor protection. Choose phenolic for maximum capacity on smooth surfaces, rubber for shock absorption and noise reduction, nylon for chemical resistance, and cast iron for extreme temperatures or very heavy loads on steel rails.

The A-Line Series offers top plate (bolt-on), bolt hole (single-bolt kingpin), and expanding adapter (stem insert) mounting configurations. Top plate is the most common for carts and racks. Expanding adapters work well for tubular-leg furniture and equipment.

A-Line casters with rubber or polyurethane wheels perform well on outdoor surfaces like sealed concrete, asphalt, and dock areas. For prolonged outdoor exposure or corrosive environments, consider upgrading to stainless steel or zinc-plated hardware, or look at the Defender D4 Series for full corrosion resistance.

What sets the A-Line apart is its broad configurability. Available in swivel, rigid, and swivel-with-brake models, the series supports wheel diameters from 4" to 8" and load capacities that typically range from 300 lbs to over 1,200 lbs per caster depending on wheel selection. Top plate, bolt hole, and expanding adapter mounting options mean the A-Line fits carts, racks, dollies, work-in-process containers, and custom fabricated equipment. Wheel materials span polyurethane, phenolic, rubber, cast iron, and nylon to match your floor type, noise requirements, and load profile.

Whether you are outfitting a new assembly line, replacing worn casters on shop floor carts, or standardizing your MRO inventory, the A-Line Series delivers reliable roll, consistent quality, and the flexibility to cover dozens of applications with a single product family. Browse the full selection below and filter by capacity, wheel type, or mount to find the right fit.