Demag
Lock washer for Demag AC80-1
This lock washer is designed for use in the Demag AC80-1 crane. It provides necessary tension to threaded assemblies to maintain secure connections during operation.
Parts diagram
Compatible models
Specifications
- Part number
- 509 769 98
- Brand
- Demag
The lock washer, part number 509 769 98, is a component used in the assembly of the Demag AC80-1 crane. It functions within threaded joints to maintain tension and prevent the loosening of fasteners during machine operation. By providing a spring force, this component helps ensure that bolted connections remain tight under the dynamic loads and operational conditions typical of mobile crane systems.
This component is specifically intended for the Demag AC80-1 model. It is designed to fit standard fastener configurations used throughout the crane structure to preserve the integrity of mechanical assemblies. Proper installation of this washer is standard practice during maintenance procedures to ensure that critical joints remain secure.
In heavy machinery, lock washers are used to maintain the preload of a bolted joint. By resisting the rotation of the nut or bolt head, they help prevent the fasteners from backing off due to the mechanical forces and environmental factors experienced by the equipment.

