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HOW DO GYRU-STAR SCREENING BUCKETS WORK?

Updated: Jun 13

Have you ever been curious about how our screening buckets actually work? In this article we're going to explore the engineering behind our industry-leading range of screening buckets.


These are the four key areas we're going to explore:


  1. The flexible poly-stars

  2. The choice of fragment sizes

  3. The hydraulic system

  4. The carbon belt drive


FLEXIBLE POLY-STARS FOR NON-DESTRUCTIVE SCREENING


Gyru-Star screening buckets use rotating flexible poly-stars to separate material. As the stars rotate, they create a tumbling action inside the bucket, which causes the undersized material to fall through the gaps between the stars.


The screening aperture, or gaps between the stars, can be adjusted by using a different size fragment kit. These are available in 4 different sizes, from 10-40mm.


As the polyurethane stars are flexible, they can screen material without crushing, shredding or tearing. This enables Gyru-Star screening buckets to be used for far more than just separating material, making them a highly versatile attachment for any kind of carrier.


The poly-stars also work exceptionally well with wet or sticky material, such as clay-heavy soils. As a result, you can keep working no matter the weather, which isn’t always possible with other kinds of screening equipment.


FRAGMENT SIZES FOR EVERY APPLICATION

Gyru-Star 40mm Fragment Kit
40mm Fragment Kit

The size of the product the bucket produces is dictated by the fragment size. Simply put, this is the size of the gap between the poly-stars. Gyru-Star buckets are available in 4 different fragment sizes, 0-10mm, 0-20mm, 0-25mm and 0-40mm.


For applications where the fragment size needs to be reduced further, comb kits are also available.


When ordering your Gyru-Star screening bucket, you will need to specify your required fragment size. However, if your needs change, then the fragment size can easily be changed.


‘PLUG AND PLAY’ HYDRAULIC SYSTEM

Hydraulic cross over kit on a Gyru-Star screening bucket
Gyru-Star screening buckets are also available with hydraulic cross over kits

Gyru-Star screening buckets are hydraulically powered and are run from the carrier's auxiliary hydraulic circuit. Depending on which model you are using, the hydraulic flow rate with vary, though the hydraulic pressure is consistent across all models in the range (200 BAR).


Designed to be a ‘plug and play’ system, Gyru-Star screening buckets are ready to go from the moment they arrive on site.


For carriers without the option to control the flow rate, Gyru-Star screening buckets can be supplied with flow control valves. These can be fitted to any Gyru-Star screening bucket and enable the operator to manually adjust the flow rate.


These flow control systems are supplied as standard with all skid steer specific models (SL range).


ULTRA-RELIABLE CARBON BELT DRIVE


Most poly-star screening buckets currently on the market still use chain drive systems. Not only are these drivelines loud, but they also require daily oiling and greasing, with the chains being prone to stretching.


To minimise downtime from maintenance, and maximise reliability, Gyru-Star screening buckets utilise an innovative and ultra-reliable carbon belt drive systems. As well as being self-tensioning, this system requires zero lubrication, eliminating the need to daily greasing and oiling.


CONCLUSION


Combined, these features are what make Gyru-Star the market leader in on-destructive screening attachments. A fast, efficient and versatile attachment, with the ability to revolutionise your on-site workflow. Gyru-Star turns your liabilities into assets!

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