What Is A Roller And What Does It Do?

The rollers are cylindrical parts, sub-driving and driven rollers. Widely used in various types of transmission systems such as rotary screen printing machines, digital printers, mining conveyor equipment, paper and packaging machinery.

Usually made of seamless steel pipe, also depends on different process needs such as aluminum alloy 6061T5, 304L/316L stainless steel, 2205 duplex stainless steel, cast steel, solid forged alloy steel core material.

The production of rollers mainly consists of the initial rolling of the roller body, the static balance of the primary school, the interference assembly of the shaft head, the finishing of the car and the balancing of the fine school. If the behavioral tolerances such as roundness, cylindricity and straightness are required to be less than 0.2 mm, it is necessary to grind the cylindrical grinder or roll grinder after finishing the car. If there is a requirement for surface hardness, it is necessary to increase the heat treatment process.

After the roll is formed, it needs surface treatment or coating such as painting, galvanizing, TEFLON spraying, rubber coating, chrome plating, ceramic spraying and oxidation for the purpose of rust prevention, corrosion resistance, wear resistance and support.

Classified by size, there are large rolls such as papermaking machines (up to 10 meters in length and more than 1500mm in diameter), and there are small flat rollers for belt conveyors on automatic assembly lines (generally within 1 meter length) , the diameter is also within 159mm)

According to the action, there are rollers that are required to ensure the transmission accuracy, such as a roller on a digital laser printer, such as a calender roll on a papermaking machine that has a pressure filter function, and a support roller that does not require high dimensional accuracy, and has a heat. The rollers required for the exchange, and the rollers for the heavy-duty filter press are not listed.

Roller diameter selection: 25mm, 32mm, 38mm, 42mm, 50mm, 57mm, 60mm, 76mm, 80mm, 89mm.

Roller material selection: carbon steel galvanizing, carbon steel chrome plating, carbon steel rubber, aluminum alloy, stainless steel, ABS, etc.

Roller type selection: no power roller, single chain roller, double chain roller, "O" belt roller, conical roller, grooved roller.

Roller fixing method: spring press type, inner shaft type, full flat type, through shaft pin hole type.