Tong Engineering is a worldwide expert in manufacturing onion sizing machines with onion processing lines capable of working up to 80 tons of onions per hour, running all over the world from Russia to Chile and back to Lincolnshire!

Tong works closely with onion growers and processors to give unrivalled onion processing experience, manufacturing a wide range of onion sizing screens specifically designed to accurately size onions with a hexagonal screen design. Get in touch if you require a custom-designed machine from the world’s leading specialists.

Tong onion processing equipment is capable of sizing all types of onions from shallots through to main crop. As well as reliable onion sizing machines, Tong also supplies a wide range of onion infeed hoppers and onion toppers, as well as onion bin dumping, filling and weighing equipment. Our extensive range of machinary provides the complete turnkey solution for your facility.

Onion SIZING Machine – Worldwide Solutions

With over 85 years of engineering expertise, you can be sure that whether you’re sizing onions in Australia, or closer to our home in the UK, Tong can offer a custom-built sizing machine and handling solution that incorporates the most advanced onion processing machines, to meet your current and future requirements. Our Custom- designed EasyClean Separator offers unrivalled crop dirt eliminating, with the gentlest handling to prevent damage to your onions.

Handling Processes



Tong is one of the world’s largest manufacturers of quality steel onion sizing screens. With a vast choice of sizing sizes available as standard, Tong’s hexagonal sizing screens are manufactured to suit all sizes and output requirements.

Onion screen sizing is one of the most popular methods for accurately sizing onions, and Tong’s EasyGrade screen sizing modules can be designed to create a complete onion sizing line to accommodate all your grade size requirements. From a single EasyGrade screen module for sizing out a single onion grade, to a consecutive line of EasyGrade modules allowing you to achieve size grades from your onion crop, Tong onion screen sizers are not only accurate and efficient, but they are also very gentle on crop.

Another popular option for gentle and accurate sizing is the Tong lift roller sizer. The onion lift roller sizer grades onions by diameter and is capable of sizing up to 40 tons of onions per hour. Available with the option of Tong’s market leading Auto-Touch HMI touch screen control, Tong lift roller sizers offer the most advanced onion sizing allowing grade bands to be adjusted at the touch of a button.



With many years of experience in designing and manufacturing complete turnkey onion sizing and handling equipment, Tong offers unrivalled expertise when it comes to integrating other specialist onion handling equipment within a Tong line.

Tong is proud to offer effective, high capacity, onion topping equipment by working with renowned onion topper manufacturer, Nicholson Machinery. The Nicholson onion topper and tailer offers effective removal of onion tops and tails prior to the sizing process, making onion sizing more accurate and effective. With Tong’s range of onion conveyor equipment, they offer a complete onion sizing machinery service.



Tong’s market-leading EasyClean separator offers effective onion dirt eliminating in all conditions. Suitable for the removal of soil and debris from onions, the EasyClean separator offers gentle dirt eliminating of onions in dry soil conditions, as well as effective yet gentle onion dirt eliminating in heavy soil conditions.

Tong’s unique Auto-Touch HMI control makes the EasyClean the most advanced onion dirt eliminator of its type on the market, with automatic adjustment of rollers to suit any crop size and dirt eliminating condition. To find out more about the EasyClean onion separator click here.



Alongside its range of quality onion sizing and handling equipment, Tong offers reliable and efficient onion peeling and processing equipment, completing the onion handling process from field to packing.

From a high capacity onion peeler that effectively removes onion outer skin and shell, to onion cutting, halving and dicing machines to suit all onion processing requirements, Tong is dedicated to working with clients to incorporate the onion processes that they require today, while accommodating any future onion handling requirements that may be integrated to meet changing customer demands.

Click here to view Tong’s range of onion processing equipment.



Whether you’re looking for a high capacity heavy duty onion hopper at the infeed of your onion handling line, or a microprocessor controlled even flow infeed hoppers to give a continuous feed of onions to your onion packing line, Tong has unrivalled experience in building a robust and reliable hopper solution for all your onion loading requirements.

Manufactured with the strongest construction, and using the highest quality components, Tong manufactures a range of static and mobile onion hoppers that can be designed to you exact specification.

With options including stainless steel onion hoppers, to heavy duty mobile onion hoppers with integrated onion dirt eliminators for receiving onions straight from the harvester, when you choose a Tong hopper you can be sure that it will perform in the most demanding onion handling situations.

For more details on Tong’s range of onion hoppers click here.

Why Choose Tong?



Tong Engineering has over 85 years of experience in manufacturing robust and reliable vegetable handling equipment, from single machines to full custom-designed systems.



With a wide range of standard onion handling machines and models, as well as custom-designed solutions, Tong can offer a quality handling system that suits any requirement, however large or small.



Built to perform under the most demanding situations, Tong onion handling equipment can be built to suit all output requirements, whether you are looking to process one or one hundred tons per hour.

Get in touch

At Tong, we are dedicated to working with our clients to help you make the right purchase.

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Telephone 231 924-5647 if you would like to find out more

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