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Mineral Sizing Equipment, Technology and Services

Mining Machinery Developments (MMD) is a leading designer and manufacturer of mineral sizing (crushing) equipment and services for the mining, metallurgical, industrial minerals, alumina and other industries.

The Promenade,
IM4 7DB,
Isle of Man
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Mining Machinery Developments (MMD) is a world leader in the design and manufacture of material processing equipment, in particular sizing (crushing) and feeding equipment. For over 40 years, MMD has delivered innovative solutions that improve the productivity, profitability and safety of operations while minimising environmental impact.

Twin Shaft Mineral Sizer™

MMD’s core product is the Twin Shaft Mineral Sizer – a high capacity, compact crusher capable of accurately sizing any combination of wet, sticky, hard or dry material.

The unique breaking action subjects material to stress, bending, tension and sheer forces as opposed to compression forces used in traditional crushers. The result is an energy-efficient machine which can contain the structural forces in a low profile frame. The Sizer’s three stages of breaking provide the ability to control the product size in all three dimensions while minimising the generation of dust and fine material.

Offering a range of primary, secondary and tertiary sizers, the largest machine is capable of processing rates in excess of 12,000tph.

An MMD 1500 series three-tooth primary sizer, capable of capacities in excess of 10,000t/hr. <br/><br/><br/><br/><br/><br/><br/><br/>
MMD heavy-duty apron plate feeders transport raw material to the crushing plant; standard widths available are 1,500mm, 2,000mm, 3,000mm and 4,000mm on D4, D7, D9 and D11 Caterpillar chains.<br/><br/><br/><br/><br/><br/><br/><br/>
MMD 500 series twin-shaft sizer at a conveyor transfer point.<br/><br/><br/><br/><br/><br/><br/><br/>
The latest 1300 Semi Mobile Sizer unit processes coal at 2,500tph. Relocated by MMD Transporter.<br/><br/><br/><br/><br/><br/><br/><br/>
The MMD Atlas Transporter provides quick and easy relocation of heavy equipment around the mine. <br/><br/><br/><br/><br/><br/><br/><br/>
The latest Mobile Sizer is capable of processing 9,000t an hour directly at the mine face. <br/><br/><br/><br/><br/><br/><br/><br/>

Heavy-duty Apron Plate Feeders

MMD has designed and developed a range of Heavy-duty Apron Plate Feeders to complement the Twin Shaft Mineral Sizer.

Often arranged beneath tipping points, Feeders transport a steady flow of material to the crushing plant, optimising production whilst minimising wear. The MMD Feeder’s unique design allows dumping of run-of-mine material even when the feeder is running empty. The ability to load at any time delivers continuity and flexibility of operation for maximum production and efficiency. The Feeder’s combination of reliability and robustness has been proven to give many years of trouble-free operation with minimal maintenance.

Fully Mobile and Semi-Mobile In-Pit Sizing & Conveying (IPSC) Systems

IPSC systems enable the use of efficient conveyor haulage directly from the mine face for optimum cost savings, environmental mining and portability. MMD is a turn-key IPSC systems provider, offering Static, Semi-Mobile and Fully Mobile systems. Fully Mobile units move frequently to work directly with the excavator, whilst sizing and delivering conveyable material onto the conveyor, eliminating trucks and their associated costs, safety risks and environmental impact. The largest MMD Fully Mobile unit is proven at over 10,000tph. Semi-Mobile Sizing Stations are modular units, which relocate intermittently as the mine develops – leveraging the flexibility of truck haulage and combining with the efficiencies of conveyor haulage. MMD has been building Semi-Mobile units since the early 1980s, and have delivered a wide variety of designs all over the world.


To support a growing range of Semi-Mobile sizer systems, MMD has developed a Transport crawler, facilitating the quick, safe and efficient relocation of Semi-Mobile structures. MMD’s Atlas Transporter is unique in its auto-levelling capabilities, ensuring loads of up to 750 tonnes remain stable and level, even on gradients reaching 10%. For safe operation, the transporter is controlled by a fully featured wireless unit – providing live feedback and maximum control while travelling, lifting or slewing.

Fully Mobile Surge Loader™

The Surge Loader is a smart, fully autonomous, mobile feeder – designed to unlock the potential of existing truck & shovel fleets. The hopper enables the shovel to work continuously even when no trucks are present, and as a result, shovel utilisation is increased to circa 95%. The Surge Loader also provides faster and more accurate truck loading, with payload targets accurate up to 98%. This revolutionary machine from MMD is destined to change truck & shovel mining as we know it, delivering production rate increases of up to 40%.


White Papers


  • MMD at Mae Moh Mine

    The order was placed on MMD to design and manufacture three Semi-Mobile Sizing Stations and one 400T Transporter, for the Mae Moh mine in Northern Thailand. This brings the total to 8 MMD Sizer Stations operating at Mae Moh.

  • The MMD Fully Mobile Surge Loader (FMSL)

    The MMD Fully Mobile Surge Loader is the first of its kind in the world. Designed to revolutionise the loading of haul trucks; making the process faster, more efficient and safer than ever before.

  • Sac-Tun Company Video

    MMD were invited to Sac-Tun mine to investigate how a Sizer could assist with the processing of coral limestone for use in the cement industry.

  • MMD Story

    For over 40 years, Mining Machinery Developments (MMD) has been a world leader in the design and manufacture of material processing equipment, specialising in Sizers, Feeders and IPSC.

Press Releases


  • Prairie Creek Lead-Zinc-Silver Project

    The Prairie Creek Lead-Zinc-Silver Project is located close to the Nahanni National Park Reserve, approximately 500km west of Yellowknife in the Northwest Territories (NWT), Canada.

  • La Parrilla Tungsten Mine

    W Resources (formerly known as Caspian Holdings) is developing the La Parrilla tungsten mine and a tungsten tailings project in Spain.

  • Diavik Diamond Mine

    The Diavik diamond mine is located on East Island, a 20km² island found in Lac de Gras, approximately 300km north-east of Yellowknife, the capital of Canada's Northwest Territories.

Products & services

  • MMD Atlas Transporter

    The MMD Atlas Transporter is the latest technology from MMD, enabling heavy semi-mobile structures to be relocated in a safe and controlled manner.

  • In-Pit Sizing and Conveying

    In-Pit Sizing and Conveying (IPSC) systems are a cost-effective and safer alternative to discontinuous material haulage by dump trucks.

  • Heavy-Duty Apron Plate Feeders

    The MMD heavy-duty apron plate feeder is designed to handle high-impact loads created from large ROM material directly dumped. Used in many types of mineral and ore applications around the world, plate feeders are key to providing reliable and controlled throughput.

  • Twin-Shaft Mineral Sizers

    MMD currently processes over 80 different minerals in more than 70 countries worldwide for primary, secondary or tertiary crushing operations.

The Promenade
Isle of Man

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MMD Mineral Sizing (Europe) Ltd
Cotes Park Lane
Cotes Park Industrial Estate
DE55 4NJ
United Kingdom

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MMD Mineral Sizing (Africa) Pty Ltd
Nguni Drive
Longmeadow West
Edenvale 1610
South Africa

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MMD Mineral Sizing (America) Inc.
41 Excellence Way
United States of America

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MMD Mineral Sizing (Canada) Inc.
222511 112 Avenue NW
T5S 2M4

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MMD Mineral Sizing (Central America) SA de CV
Avenida Tulum
Centro Empresarial Ekin'Ox, Oficina 202
Manzana 3, Lote 2-01, SM 15-A
CP 77500
Quintana Roo

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MMD Mineral Sizing (South America) Ltda
228 Edificio Argentina
Suite 710
Praia de Botafogo
22 250-040
Rio de Janeiro

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MMD Mineral Sizing (Chile) Ltda
Ebro 2740
Office 1103
Las Condes 7550169

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MMD Australia Pty Ltd
2 Mineral Sizer Court

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Beijing MMD Mining Machinery Co Ltd
Ma Po Ju Yuan Industrial Park
Shunyi District

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PT. MMD Mining Machinery Indonesia
The Manhattan Square
Mid Tower 7th Floor Suite H
Cilandak Timur
Jl. TB. Simatupang Kay. 1S

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MMD Asia Pacific Ltd (Thailand Office)
25th Floor, Thanapoom Tower
1550 New Petchburi Road

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MMD Heavy Machinery (India) Private Ltd
PS Arcadia Central, 7th Floor (7C & 7D)
Premises No. 4A, Abanindra Nath Thakur Sarani
Kolkata 700016
West Bengal

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MMD Green Mining Solutions (Mauritius) Limited
Suite 110 Grand Baie Business Quarter
Chemin Vingt Pieds
Grand Baie, 30529

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MMD Australia Pty Ltd - Perth Facility
327 Victoria Road
WA 6090

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