List of Top Combine Harvester Manufacturers

As of 2011, John Deere offered five different combines, including the "T" series basic combine as well as four model levels of the "STS" series combine, known as single tine separation models. John Deere is the world's largest farm equipment manufacturer, so there's no shortage of used equipment available. New equipment can be purchased from any John Deere dealership, with locations in every state in the United States.

Case International Harvester is a multinational company with dealer-based service in every state. Case offers six models of its Axial-Flow combines with varying power outputs and grain capacities to accommodate various different sized farms, from the family farm to industrial level farming. Axial Flow combines utilize the fewest moving parts of any combine in the industry, simplifying repairs to get farmers back into the field more quickly.

New Holland boasts the largest combine in the industry as of 2011. The CR 9090 is a record-setting combine harvester utilizing New Holland's exclusive twin rotor technology. New Holland says that is twin rotors provide more centrifugal force than standard rotor designs and provide a higher-quality threshing action by allowing grains to rub against one another before coming into contact with the metal components of the thresher.

Massey Ferguson offers three combines rated between 300 and 425 horsepower. In 1938 Massey Ferguson became the first manufacturer to produce self-propelled combines. Massey says its combines boast the world's fastest unloading rate, a 60 percent increase over the competition, to help get the job done more quickly. Massey maintains a network of dealers throughout the United States, all with service departments.