Rotastar screening bucket
About the Rotastar™ screening bucket
The Rotastar™ was the first screening bucket in the world to use polyurethane stars. It is a unique, high-output screening bucket that combines our Market-Leading Features. The Rotastar™ bucket has a unique screening action. It rotates the material in a similar manner to a trommel screen, but has the benefit of rotating star discs, agitating and clawing at the material as it turns. This is achieved by mounting star shafts on a large arc, forming the back and top of the bucket.
Key Features
stars
Material is constantly rotated, without any chopping or pinching, making screening of damp, fragile and special materials possible. Suitable for top soil, waste, turf, roots, gypsum, knotweed and many other applications.
speed
Variable speed control is fitted as standard up to the RS10-20, so it is possible to adjust fragment size by changing shaft speed. Most importantly, this allows the operator to set the shaft speed to suit conditions and requirements.
Fraction Size Reduction
With different star and collar options it is possible to reduce fine fraction size from the standard 20mm to 15, 10 and 8mm. The innovative Lloyd split-collar enables the user to set the bucket to 15 or 10mm without removing the shafts. The collars can also be removed quickly, returning to standard set up.
Combs
Top and bottom combs are available. Filling the gap between the apron, top scraper and star, they are normally used in combination with fraction size reduction kits. Manufactured from polyurethane to minimise adjacent star wear.
Spacers
To create a larger fraction size, spacers can be fitted between each star. Bark and compost are two popular applications for spacers. Additional shafts can be supplied with a specific set up, and quickly fitted to any bucket.
Transmission
Heavy duty chain drive powered by hydraulics is rugged and reliable. Simplicity is key, standard parts, easy maintenance and quick shaft removal.
Guard
The well protected, simple, sealed guard design, primarily on one side, offers easy inspection and fast maintenance of shafts and transmission.
Finish
All fabricated parts are shot blast and receive 4 coats of 2 pack paint. This provides good longevity and presentation.
Tube
The tube is a key part of the Rotastar™ design. Combined with the formed headstock, forces are transmitted effectively from machine to the cutting edge and body of the bucket.
Headstock
The formed headstock is a key part of the Rotastar™, perfect geometry giving good handling and optimised screening angles/position.
Discs
Replaceable side panels work against replaceable shaft end discs. The area where the rotating star meets the fixed side panel has a unique design, with steel discs fitted to the shaft ends. This ensures even star wear across the shaft length, and closes the gap between star and side panel to maintain a genuine fraction size.
Quiet
The polyurethane stars ensure quiet running when compared to static and steel disc machines. A big benefit on sensitive sites.
Fabrication
Rugged construction, using the best design and materials for long life and reliability. High percentage of robot welding used in the Rotastar™ for efficiency and quality.
Maintenance
Easy maintenance. The complete design of the Rotastar™ allows for easy shaft removal. The polyurethane stars are an inexpensive, easily replaceable, part that reduces down time. Bearings are sited away from contamination and easy to grease.
shafts
The shafts operate in one direction only and require a standard one-way hammer circuit. This also eliminates the need for a drain line. Shafts are designed for specific load, from hollow lightweight shafts on the smaller models to 50 x50mm high strength solid section on the larger models.
Loader
There are loader bracket options from the RS2-4 to RS 13-20. The loader bracket has a quick hitch design, so that the bucket can also be used on an excavator without the additional weight of the loader bracket. The RS 25-30 and RSLS 12-20 include loader brackets as standard.
Rotastar™ screening bucket
Designed to save time and resources, the Rotastar attachment is simple to handle and transport. It’s the world’s first screening bucket to use polyurethane rotating stars, whose lightweight, flexible design creates a large screening surface for superior output. The stars’ repelling finger profile rotates in one direction without pinching or crushing, converting onsite material into usable product and significantly cutting typical excavation costs for transport, dumping, and replacement purchases. Perfect for soil, gravel, rocks, waste, roots, vegetation etc. Rotastar Buckets to suit carrier sizes 2-30T.
standard features
Average Screening 17-125 Tons p/hr
Standard output 20mm
Simple Maintenance
Low Hydraulic Requirements - No case Drain Line
Heavy Duty Chain Drive System
custom features
Polyurethane Collars to reduce output size to 15 or 10mm
Excavator and Loader bracket options
specifications
Working width
overall width
bucket weight
bucket capacity
from 640mm
from 910mm
from 250kg
from 0.14m3