$29.00
This sheave carries the lift chain over the upright on Crown lift trucks, turning on its bearing to guide the chain as the mast raises and lowers the carriage. The grooved rim seats the chain and directs its path from the anchor over the mast to the load, so accurate groove geometry keeps the chain tracking true. Continuous rotation under load makes the bearing and groove the main wear points.
Carrying the lift chain over the top of the upright, this Crown sheave turns on its bearing to guide the chain as the mast raises and lowers the carriage. The grooved rim seats the chain and directs its path from the anchor, up and over the mast, and back down to the load, so the groove geometry is what keeps the chain tracking true instead of climbing or riding a shoulder.
Because it rotates continuously under the full working load every time the mast cycles, the bearing and the chain groove are the main wear points across the life of the truck. A worn groove lets the chain track poorly and wear unevenly, and a dry or failing bearing shows up as roughness, noise, or drag as the sheave turns. Smooth, quiet rotation is the sign of a healthy sheave, and roughness or wobble is the cue to replace it before it takes the chain with it.
Match the sheave diameter and the bore to the Crown mast series being serviced, since the outside diameter sets the chain path and the bore governs how the sheave seats on its shaft and bearing.
