Our wheels are machined from solid steel plate for durability and strength. Standard sizes range from 6″ to 24″ diameters.
When required, for larger doors under extreme loads, wheels are machined from carbon steel and treads are flame hardened to a required Brinell hardness. Standard or custom retro-fit. Bearings are tapered roller type, arranged so that both the vertical loads and the horizontal wind loading will be transmitted from the door through the bearings. The bearings are provided with a dust seal to retain the grease and prevent the entrance of dirt. Axles are equipped with grease fittings for pressure lubrication.