Extreme Heavy-Duty Hinges manufactured from A36 plate steel. First, all raw material surfaces are milled to final dimensions. This provides a smooth finish for appearance, but also necessary for critical datum surfaces. Next, the blocks are precision machined to receive the hinge pin, roller bearings and mounting bolts. Finally, they are assembled with anti-friction, radial and thrust bearings, in addition to a hardened precision ground alloy steel hinge pin of aerospace quality. The non-removable hinge pin is Armoloy® coated for additional corrosion protection and a lower coefficient of friction. The assembly is completed with an oil seal protecting the hinge internals in more severe environments.

The results: a maintenance free, reliable hinge allows doors weighing several tons to be operated with very low forces!

The K-5000 features (+/- 1/8") adjustment in the thrust direction with a set screw located at the top of the hinge:
1) Doors can be adjusted within their frames after installation.
2) Load distribution between a set of hinges can be accomplished; thus, increasing load-life on thrust bearings.