DLL Series Application Notes
Application and Safety Notes for DLL Series
Workpiece Thickness
The thickness of sheets, plates, and blocks will affect the magnet's lifting capacity. The thinner the plate, the lower the force of attraction. Even though thinner plates are lighter, they are more difficult to handle.
When transporting the workload by pushing or pulling the workpiece a sheer-force is created which can diminish the holding value of the lifter. To reduce the risk of undesired dropping of the workload, non-peeling thick plate is ideal. Employment of a spreader bar utilizing two or more lifters may be necessary with some workloads.
When lifting plates or sheets from a stack, magnetism may penetrate to the lower pieces. This should be avoided because of the unsafe condition of multiple clinging sheets. This effect is normally associated with thin sheets.
Operating Temperature
Temperatures affect the performance of magnetic lifts. The recommended operating temperature for DLL-Series lifts is between -76 degrees Fahrenheit and +212 degrees Fahrenheit.
Surface Finish
Rust, debris, painted, various mill scaled surfaces, and worn poles can create air gaps which will affect the holding capacity of magnetic lifters. The best magnetic condition is achieved when the magnetic poles make complete contact with the load.
Cam Release
The cam release is made up of the cam release shaft and the cam release puck. The puck must be positioned entirely on the workload to ensure the lifter can be removed from the workload.
Jack Screw
The jack screw is used in the event that the cam release does not break the magnet free from the workload. It can also be used to assist in the positioning of the magnet on the workload.
Storage and Preventative Maintenance
To avoid undesired attraction of metal shavings and debris special care should be taken with the storage of magnetic lifters. Lifters should always be stored on a surface free of dirt, grit, or metal chips. The poles are mild steel and may rust if exposed to moisture. Magnetic materials used in the lifter are typically brittle and the unit should never be dropped onto the workload. Dropping magnetic lifters may cause permanent damage to the magnetic poles. Routine inspection of the magnetic poles may be necessary to ensure the best mechanical condition of the lifter. The steel poles may need to be resurfaced. Contact the factory when this condition arises. Always clean the working face of the magnet of all debris prior to use.
The preceding has been designed as advisory information only and should not be considered an all-inclusive safety outline. Please contact Dura Magnetics for further explanation of safe operation of magnetic lifters outside of the scope of these notes.
