Upload a DrawingVibrator springs are compression springs used in vibrating screens and other vibration equipment. They carry the weight of the vibrating body, let it move freely and isolate the vibration from the frame or floor.
The difference from a standard compression spring is at the ends. Both end coils are wound to a smaller diameter so they fit over a shaft, stud or spring seat with a slight interference. The spring stays located on its mount while the machine shakes, instead of walking or jumping off.
What decides how long a vibrator spring lasts
- Fatigue. The spring carries the static weight of the machine and is cycled around that load at the vibration frequency, many thousands of times an hour, so material, heat treatment and surface condition matter more than for a static spring.
- The end grip. The reduced end coils must fit the shaft or seat diameter closely. Too loose and the spring rattles and wears; too tight and it is hard to fit or cracks at the end.
- A matched set. A screen usually stands on several springs. If their stiffness or free length differs, the body tilts and loads one corner, so springs for one machine should be made, checked and replaced as a set.
- Resonance. The spring’s own natural frequency must sit well away from the machine’s running speed, or the coils surge and fail early. Tell us the operating speed of the machine.
- Corrosion. Screens and feeders often work outdoors or in wet material, so a zinc plated or coated finish is usual. Zinc-plated springs are baked after plating to remove hydrogen and prevent embrittlement.
What to send for a quotation
- A drawing, a sample or a photo of the old spring with its mount
- Wire diameter, outside diameter of the body and free length
- Inside diameter of each reduced end, or the shaft or seat diameter it fits
- The load each spring carries and the installed height
- Operating speed or vibration frequency of the machine
- How many springs the machine uses and the expected quantity
Springs are made to the approved drawing or sample, and batches are checked for dimensions and load before shipment. For general compression spring design, see our compression springs page.
