Main and Secondary Load Bearings — Hardened and polished steel balls rotate in two smoothly coined, case hardened raceways.
Axle — 1/2" diameter bolt with lock nut.
Lubrication Fittings — In swivel assembly and to roller bearings in most wheels.
Top plate: 5" x 5-1/2", slotted bolt holes.
Featured Wheel Bearings: Precision Ball Bearings - double sealed, maintenance free, superior rollability aids manual applications, not recommended if shock loading is prevalent Straight Roller Bearings - traditional anti-friction bearing, best for manual applications where shock loading (but no side thrust) is prevalent If you need a large quantity of this product, call us at 1-800-338-1382 for additional bulk discounts!