Patent ID: 7537389

Claim:
A roll-up shutter ball bearing assembly consisting essentially of: a separate single rust resistant metal, outer bearing ring forming a ring-shaped housing and convex curved outer exterior facing wall surface, with an axial opening therethrough; a separate single rust resistant metal elongated cylindrical insert having a first end and an opposite second end, and an axial opening therethrough, with an outer sidewall between the first end and the second end being of uniform diameter so that the cylindrical insert has no cone shape, a single circumferentially grooved in the outer sidewall adjacent to the first end, a single side wall hole adjacent to the second end, the hole passing from outside the cylinder to the axial opening and having interior threads in the hole; a ring of rust resistant metal ball bearings positioned in the single circumferentially grooved outer sidewall of the cylindrical insert so that the cylindrical insert when positioned inside of the axial opening of the ring-shaped housing, allows for the outer bearing ring and the cylindrical insert to rotate independently of each other; a separate single ring-shaped rust resistant metal retaining cap-ring washer having an opening therethrough, the cap-ring washer having a flat outer sidewall surface, the cap-ring washer for being positioned against the first end of the cylindrical insert for holding the cylindrical insert inside of the outer bearing ring; and a separate single rust resistant metal set screw having an upper end and a lower end, the set screw for being inserted into the single side wall hole in the cylindrical insert so that the lower end is adapted to abut against and fasten an idler shaft on a roll up shutter to the bearing assembly.