770 lbs Heavy Duty Machined Steel 45mm Drop-in Ball Transfer Unit Inner Diameter - 3 inch (3") it's ideal for machine tool

it's ideal for machine tool spindles

NJ312EG Nachi Roller Bearing

Bearing outer diameter is 340mm and Bearing width is 56mm

KBS60GUU NB Standard Type Bearing

770 lbs Heavy Duty Machined Steel 45mm Drop-in Ball Transfer Unit Inner Diameter - 3 inch (3") it's ideal for machine tool770 lbs Heavy Duty Drop In Ball Transfer Unit 1 3 16" Ball Chrome Plated Steel Machined for Strength This heavy duty drop in ball transfer unit is engineered for high load material handling applications, offering smooth omnidirectional movement under dynamic loads up to 770 lbs. Built from solid machined steel with chrome plated components, it delivers precision, durability, and low friction performance in demanding industrial environments. Main ball