Hamilton Caster introduces ZPI Integrated Precision Ball Bearing
Hamilton Caster launched its new ZPI (Zero-Fix Precision Integrated) Ball Bearings, a new series of wheel bearings designed to extend service life, improve wheel rollability, and simplify assemblies across Hamilton’s vast caster & wheel product line.
Designed and engineered in-house, the new ZPI bearing rethinks traditional industrial wheels with metric precision ball bearing by eliminating the top hat bushings that introduce friction, wear, and long-term performance degradation. By allowing the wheel to roll more efficiently around a stationary inner ring, the ZPI™ design significantly reduces fretting and ball sliding — two major contributors to premature bearing failure in conventional assemblies. The integrated design improves leadtime and simplifies assembly in Hamilton’s U.S. factory.
Durability testing revealed bearing life improvements exceeding 40%, directly extending the service life of both the bearing and the overall caster assembly. Performance testing further demonstrated a 10%–14% reduction in start-up and sustained rolling force, delivering measurable improvements in maneuverability and ergonomic performance under load.
The ZPI™ bearing Series consists of six variations accommodating axle sizes: ½ inch, ¾ inch, 1 inch, & 1-1/4 inch. In addition to overall performance improvements, the new bearings feature a distinctive red seal for quick visual identification, along with clear product markings that support traceability and quality assurance throughout the supply chain.
The new bearings began shipping this month and are now offered in 80% of Hamilton’s product line withzero cost impact, delivering immediate performance gains to customers.
INDUSTRIAL SUPPLY MAGAZINE
The January/February issue of Industrial Supply magazine features an in-depth cover story about Grainger. Plus, we're featuring articles by contributing writers Dr. Bharani Nagarathnam and Frank Hurtte, as well as interviews with numerous product and distribution industry experts.
