Harvesting and threshing terminology

Harvesting

Combine: A machine that moves through the standing crop gathering, threshing, sorting, cleaning, and collecting grain. A pick-up attachment may be included in the bagging configuration. It can be used to handle swathed crops. It may be self-propelled or driven by a tractor.

Self-propelled combine: A combine on which a sufficient power rating engine is installed to act as a power source; it can be wheeled or track-laying.

Wheeled Combine: The pneumatic wheels are employed in this combination.

Track-laying combine: Instead of pneumatic wheels, this combine has full or half tracks.

Tractor operated combine: A combine that requires a tractor with a sufficient power rating to operate. It may be trailed or placed on the side.

Header: The part of the combine that contains the crop-gathering machinery.

Gathering width: The distance in millimetres between the centerlines of the outermost divider points. When using adjustable dividers, the maximum and minimum dimensions must be specified.

Grain header width: The distance between the side sheets of the header, measured directly above the sickle sections’ front points. The width must be measured in millimetres.

Corn Header width: The number of units multiplied by the average distance between the centre lines of neighbouring picking units. When the width of the header is customizable, the maximum and minimum dimensions must be specified. The width in millimetres and the number of picking units must be specified.

Knife or Sickle: The crop-cutting reciprocating component of the header.

Knife or Sickle Frequency: The number of cycles completed by the sickle in a particular amount of time. The whole movement of the sickle in one direction and its return to the starting place constitutes one cycle. The frequency is measured in complete cycles per minute.

Sickle Stroke: The distance travelled by a point on the sickle in relation to the guard’s centre line in n half cycles. The stroke must be measured in millimetres.

Knife Registration: The alignment of the knife section’s centre line with the guard’s centre line.

Pick up: A device used to collect a harvest from a window.

Peg Drum: Spikes or pegs are arranged in rows on a cylinder.

Rasp Drum: A cylinder with serrations on the bar.

Cylinder Diameter: The diameter of the circle created by the cylinder threshing elements’ outermost point, in millimetres.

Cylinder Width: In millimetres, the length of the cylinder bar measured parallel to the cylinder axis.

Concave Arc: A system for calculating the breadth of a concave in degrees. This is measured in respect to the cylinder’s centre from the front to the first bar to the back of the last bar.

Cylinder and Concave Clearance: The distance in millimetres between the cylinder’s tip and the inner surface of the concave. For both the front and back sides of the concave, the minimum and maximum clearance in a given setting and adjustment range must be indicated.

Concave Width: The minimal distance in millimetres between the two panels of the combine in which the concave is attached.

Concave Length: The distance in millimetres between the front of the first bar and the back of the last bar, measured around the contour produced by the inside surfaces of the concave bars.

Concave Area: In square millimetres, the product of the concave width and concave length.

Concave grate area: The permeable section of the concave region for separation. The area must be computed using the permeable surface’s outer measurements and reported in square millimetres.

Concave grate extension: A permeable piece that is roughly concentric with the cylinder and extends the concave shape in general.

Concave grate extension area: In square millimetres, the product of concave ratio extension length and concave width.

Transition grate: A permeable piece that connects the straw walkers or rack to the concave or concave grate extension.

Transition grate length: In millimetres, the contour length of the top surface of the transition grate.

Transition grate area: In square millimetres, the product of the transition grate length and the concave width.

Straw walker or straw rack area: In square millimetres, the product of the straight length and the inside breadth of the separator side structure immediately near to the straw walkers or rack. Where walker extensions are specified in the machine’s standard specs.

Straw raddle area: In square millimetres, the product of the raddle length and the exposed width of the raddle.

Shoe:The oscillating structure that supports the chaffer sieve and chaffer sieve extension, as well as the cleaning sieve of sieves.

Sieve cleaning areas of the shoe: Chaffer, intermediate, and cleaning sieves, as well as their extensions The area of each must be computed using the permeable surface’s outer measurements and given in square millimetres.

Pneumatic cleaning areas:  When only aerodynamic measures are used to clear chaff. The product of the breadth and depth of the air stream at the point of contact of the air with the crop material is used to compute these regions. The depth must be measured perpendicular to the air flow direction. The measurement must be in square millimetres.

Other cleaning areas: Dirt screens, re-cleaners, and other cleaning accessories These regions must be defined.

Cleaning area total: The total of the areas of each chaffer, chaffer extension, cleaning sieve (s), and sieve extension (s), if any, calculated using the sievable surface’s outer measurements stated in square millimetres.

Component areas: The regions described in 28, 29, 31, 34, 35, 36, 38, 39, and 40 should be mentioned individually for reasons of combine specification and should not be utilised singularly or in combination as a measure of machine performance or capacity.

Header loss: As a result of the cutter bar and header unit’s action, grains and ear heads are shed and left on the ground.

Non-collectable loss: As a result of the cutter bar and header unit’s action, grains and ear heads are shed and left on the ground.

Pre-harvest loss: Grain or ear head loss from the standing crop prior to harvesting equipment activity in the field.

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