The CONSTMACH Wobbler Feeder is a feeding and scalping unit with rotating elliptical bars, installed ahead of the primary crusher to meter material and remove fines. The sections below explain what it does, the materials it suits, where it fits in the line, its main specifications, its maintenance characteristics, and how it compares to a grizzly feeder.
What does the wobbler feeder do?
It performs two jobs at once: it feeds bulk material into the primary crusher at a controlled, even rate, and it scalps the fines out of the feed. Rotating elliptical bars create a wobbling motion that advances larger material forward while undersize drops through the gaps between the bars.
What materials and use cases is it suited to?
- Particularly suited to sticky, wet and clayey feeds that would blind a fixed grizzly or clog a conventional feeder.
- Used in mining, aggregate and recycling applications where these difficult materials must be handled.
- Removes fine, often damp material before it reaches the crusher.
Where does it fit in the crushing line?
It sits at the primary crushing stage, taking feed from a hopper or directly from trucks and delivering it to the primary crusher. The fines it scalps can be routed around the crusher, so only material that needs crushing reaches the chamber, reducing the load on downstream crushers and screens.
What are the main specifications?
- Feeding capacity 150-200 t/h; operating weight 18.5 tonnes.
- Dimensions 4,000 x 1,000 mm.
- Body liners HARDOX 450 wear plate, 10 mm thick.
- Wobbler motor 14 x 3 kW at 1,500 rpm, GAMAK brand, with a heavy-duty gearbox.
- Walking platforms and steel legs included.
What are its maintenance characteristics?
CONSTMACH notes that the mechanical simplicity of the design results in lower operating and maintenance costs while handling demanding environments. The HARDOX 450 body liners protect against wear from the abrasive, sticky material passing through, and the elliptical bars are driven through a heavy-duty gearbox.
How does it compare to a grizzly feeder?
A wobbler feeder occupies the same position as a grizzly feeder ahead of the primary crusher but handles difficult feed differently. A static grizzly relies on vibration and an open deck and can blind on wet or clayey material, whereas the rotating elliptical bars of the wobbler keep such material moving and separate the fines through the moving gaps, making it the preferred choice where feed is consistently sticky or wet.
