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Series ZFWH Spinfinity Maintenance-Free Casters

Capacity Range: 600 – 2,500 lbs.


The new Zero Fix Spinfinity™ Series casters represent a new class of the “best of breed” kingpinless design. The ZFWH Series represents Hamilton's answer to our customers asking for a highly durable maintenance-free kingpinless caster with the industry's most popular 4" x 5" mounting plate.

The top plate and inner raceway are forged steel formed from one piece, providing a superior raceway for shock conditions. Once formed, the raceways are CNC-machined and then hardened to ensure a uniform depth in hardness of the swivel raceway. The hardening and the CNC-machining together produce an excellent swiveling caster under extreme loads.


Quality Features & Specs

  • Swivel Construction Best of Breed Kingpinless - forged steel top plate and fork base; 1/4" x 2" precision laser cut steel legs welded inside and outside to forged steel horn base.
  • Load Bearing 2 9/16" diameter hardened and CNC-machined raceway with 3/8" balls.
  • Product Finish Powder Coated - Caster rigs are powder coated with Hamilton’s new Crimson Powder, a metallic HAA Polyester providing a premium look and excellent durability for both interior and exterior environments.
  • Sealed Swivel Construction The forged ring is cnc-machined with a precision groove to accept a large seal made from Nitrile butadiene rubber(NBR) designed to keep grease in and contaminants out.
  • Axle 1/2" diameter hex head with lock nut.


Caster Engineering Tools

These calculators apply to any caster application—even if you’re browsing a different category. Use them to estimate load rating per caster, select wheel material, and estimate push/pull force. Expand any tool for full analysis + a share-ready spec line.

CasterSpec Load Calculator
Fast estimate. Expand for safety factor + uneven floor + spec output.
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Load
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Base per caster
Worst-case per caster
Recommended rating
Spec output (auto-generated)
Tip: paste into RFQs / threads. Expand tool for advanced inputs.
WheelMatch Material Selector
Fast recommendation. Expand for noise, duty cycle, floor protection.
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Wheel
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Primary recommendation
Good alternate
When to avoid
Spec output (auto-generated)
Engineers share tools that output a clean “why” line.
PushForce Push/Pull Calculator
Estimate effort fast. Expand for operators, materials, bumps, startup mode.
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Push
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Estimated total force
Per operator
Pass / target
Spec output (auto-generated)
If effort is high: bigger wheels + better material + smoother path wins.
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