GrainKing Nyrex

GrainKing Nyrex, Chaser bins for the future manufactured today. GrainKing’s Chaser bins have evolved a lot over the last 40+ years. from simple RHS, cogs and sheet metal to smart laser cut folded parts with improved gear ratios and hydraulic suspension. GrainKing Chaser bin sizes range all the way up to 75T and come with a 5 year structural warranty, brakes, lights, cameras and many more standard features. Explore the models to find out more!

GrainKing Geminus

GrainKing Geminus for the future, manufactured today.

There is sure to be a product which suits your needs with 25T, 35T, 45T and 60T GrainKing Geminus sizes available. We now also have the option to add a 10000L Liquid fertilizer tank into the bin. The GrainKing Geminus is designed with two equal sized bins and dual augers with unloading capacity up to 20 ton per minute. The seeding unit is designed for zero contamination and maximum efficiency.

GrainKing Geminus come standard with features that make operating efficient, safe and convenient. The bins can be used at seeding and harvest time, as well as throughout the year for mixing grain into sheep feeders.

GrainKing Maximus

GrainKing Maximus for the future, manufactured today. GrainKing’s range of Motherbins comes in the form of the Maximus, a vast improvement on our original Motherbins. With capacities ranging up to 300T, the largest Motherbin in the world, there’s a Maximus for every farmer out there. Each Maxi comes standard with brakes, rear ladder, lights, cameras and many more standard features. Explore the range to find out more!

GrainKing Dynamis

GrainKing Dynamis for the future, manufactured today. The Dynamis is the result of farmers feedback throughout Australia wanting a narrow, easy to turn and high capacity Motherbin. We listened and revamped our original style Motherbins into what is now the Dynamis. Standard features include a rear ladder, brakes, lights, camera and much more. Explore the Dynamis product to find out more!

GRAINKING MAXIMUS

GrainKing Maximus for the future, manufactured today. GrainKing’s range of Motherbins comes in the form of the Maximus, a vast improvement on our original Motherbins. With capacities ranging up to 300T, the largest Motherbin in the world, there’s a Maximus for every farmer out there. Each Maxi comes standard with brakes, rear ladder, lights, cameras and many more standard features. Explore the range to find out more!

GrainKing Maximus Mother Bins – High-Capacity Field-to-Road Solutions

Maximus mother bins provide field-edge grain storage from 140 to 300 tonnes during Australian harvest, letting chasers unload without waiting for trucks. These large-capacity field bins sit at paddock headlands or laneways, creating a buffer between header operations and road transport. Configurations suit broadacre wheat, barley, canola, and pulse operations where coordinating multiple chasers with B-double or tri-axle truck movements slows harvest progress.

 

Scale your storage capacity to your operation’s goals. The 140T and 176T configurations suit medium-to-large farms looking to streamline harvest logistics. Whereas, the 220T (275,000L) and 300T models are built to handle the largest of farms and corporate operations.

The Maximus Advantage

Stop watching your chasers queue for trucks while your headers sit idle. High-capacity field storage like Maximus mother bins create a buffer that separates your harvest pace from unpredictable truck schedules. This means your combines can keep cutting regardless of transport timing.

Cut chaser travel distances by positioning storage at the field edge instead of running to distant trucks. Shorter cycles mean each chaser moves more tonnage per day while burning less fuel, boosting daily harvest output without adding equipment. Fewer truck trips during peak periods reduces the coordination overhead that pulls you away from managing the harvest.

Complete Maximus Range Overview

Size your field storage correctly to eliminate bottlenecks instead of creating new ones. Four capacities handle different operational scales and harvest intensities.

Maximus 140T


Move beyond direct truck loading and stop losing productive time to coordination delays. 140 tonnes provides the buffer that keeps combines running consistently even when truck arrivals fluctuate throughout the day.

Maximus 176T


Support two to three chasers working simultaneously without constant truck management. The second Maximus model comes with 176 tonnes which reduces how often trucks need positioning in your fields, cutting safety risks and freeing you to focus on harvest operations instead of logistics coordination.

Maximus 220T


Handle your sustained high-volume flow from multiple combines that overwhelm standard field storage. The 220T Maximus with its 275,000L capacity keeps contractor operations, large broadacre, and corporate farms running at full intensity without creating new bottlenecks at the bin.

Maximus 300T

Minimise truck turnaround requirements to ensure you’re maximising every hour of favorable harvest conditions. The 300 tonne capacity, recognized as the world’s largest mother bin, gives large contractors and mega-farms the buffer they need to turn weather windows into completed acres.

Operational Benefits & Performance

Keep trucks moving instead of creating new wait times at your field bin. The Maximus 22″ auger’s 15 tonnes per minute discharge rate loads efficiently while large capacities handle high-capacity chasers at full speed.

✔️ Keep receiving grain from chasers even when temporary weather delays stop road transport.
✔️ Roll tarp protection separates field operations from truck schedules.
✔️ Cut chaser’s cycle time and fuel consumption with strategic field-edge positioning.

Check grain levels from the ground instead of climbing bins during busy periods. A total of 10 viewing windows eliminate unnecessary ladder trips.

Work your field equipment at full capacity regardless of truck availability. That’s the practical outcome: combines and chasers running at full productivity while the bin manages the buffer between harvest and transport.

Explore the Complete GrainKing Range

Build an integrated system instead of managing separate equipment. Match your Nyrex chaser bins for optimized field-to-bin transfer. Run Geminus seed and super bins for dual-purpose efficiency. Add Dynamis field bins for flexible storage.

Match Capacity to Your Operation

Match your investment to real-world logistics instead of guessing capacity. Factor in your combine fleet, chaser capacity, field-to-road distances, and daily tonnage targets when comparing the four options above.

Request a quote or speak with GrainKing’s team. Our experts will review your harvest flow, storage needs, and transport setup and help you spec a Maximus mother bin configuration built around your operation.

Talk to a GrainKing expert today

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Test out a GrainKing bin on your farm this harvest! Get in touch to find out more.

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