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The silage cutter header is the front line of forage harvesting. It is the component that touches the crop first and determines how well the rest of the silage harvesting equipment performs. Whether you are cutting grass, maize, or legumes, the header must match the crop and the harvester. This article explains the design, operation, and maintenance of the silage cutter header. It also discusses how it fits into the broader category of silage harvesting equipment. Shijiazhuang Tianren Agricultural Machinery Equipment Co., Ltd manufactures and supplies headers and parts for efficient silage production.
A silage cutter header is an attachment that mounts to the front of a forage harvester. Its purpose is to cut the standing crop, gather it, and feed it into the harvester for chopping. The header is not a single piece but a system of components. These include the cutting mechanism, the gathering mechanism, and the conveying mechanism.
The cutting mechanism may be a reciprocating knife, a disc cutter, or a rotary drum. The gathering mechanism may be a pick up reel, a set of gathering chains, or a belt. The conveying mechanism moves the cut crop to the center of the header and into the feeder house of the harvester.
There are two main types of silage cutter headers: grass headers and maize headers. Each type is designed for the specific characteristics of the crop.
Grass headers are also called pick up headers. They are used for grass, alfalfa, and other forage legumes. They have a wide working width and a floating cutter bar that follows the ground contour. A reel with spring tines lifts the crop and feeds it to the cutter bar. The cut grass is then consolidated by a cross auger.
Maize headers are also called row headers or corn headers. They are used for maize and sorghum. They have row units that match the planting row spacing. Each row unit has two gathering chains and two snapping rolls. The chains pull the stalk into the header. The snapping rolls pull the stalk down and snap the ear off. The entire plant is then chopped.
The table below compares the two types.
Feature Grass Header Maize Header
Primary crop Grass and legumes Maize and sorghum
Gathering mechanism Pick up reel with tines Gathering chains
Cutting mechanism Reciprocating knife Rotary disc or drum
Row configuration Not row specific Row specific
Working width 3 to 5 meters 4 to 12 rows
Kernel processor Not applicable Optional
The operation of a silage cutter header is a sequence of actions. First, the header engages the crop. For grass, the reel lifts the crop and pushes it toward the cutter bar. The cutter bar cuts the grass. The cut grass falls onto an auger that moves it to the center. For maize, the gathering chains pull the stalk into the row unit. The snapping rolls pull the stalk down and snap the ear off. The stalk and ear are then chopped by the harvester.
The key to efficient operation is matching the header speed to the ground speed. If the header runs too fast, the crop may be pulled before it is cut. If the header runs too slow, the crop may pile up and plug. The operator must adjust the speed based on crop conditions.
Several technical factors affect the performance of a silage cutter header.
Knife sharpness is the most important factor. Dull knives tear the crop and increase power demand. They also produce a ragged cut that is more prone to spoilage. Sharp knives produce a clean cut and reduce fuel consumption.
Shear bar clearance must be set correctly. The gap between the moving knives and the stationary shear bar should be 0.5 to 1.0 millimeters for grass and 1.0 to 1.5 millimeters for maize. A gap that is too wide causes poor cut quality. A gap that is too tight causes metal to metal contact and rapid wear.
Header floatation is important for grass headers. The header must follow the ground contour to avoid digging into the soil or missing low lying grass. Most modern headers have a hydraulic float system that adjusts the ground pressure.
Row spacing must match for maize headers. If the row spacing of the header does not match the planting row spacing, the gathering chains will not engage the stalks properly. This leads to missed stalks and yield loss.
Regular maintenance of the silage cutter header is essential. Clean the header after each use. Remove all crop residue and dirt. Inspect the knives for wear or damage. Sharpen or replace them as needed. Grease all bearings and pivot points. Check the tension of belts and chains. Inspect the hydraulic hoses for leaks. Replace worn tines on the reel. Follow the maintenance schedule in the operator manual.
Q1 What is a silage cutter header?
A1 It is the front attachment on a forage harvester that cuts and gathers the crop for silage.
Q2 What is the difference between a grass header and a maize header?
A2 A grass header uses a pick up reel and a cutter bar. A maize header uses row units with gathering chains and snapping rolls.
Q3 How often should I sharpen the knives on a silage cutter header?
A3 Check the knives daily. Sharpen them every 50 to 100 hectares or when you notice a ragged cut.
Q4 Can I use a maize header for grass silage?
A4 No. A maize header cannot lift lodged grass or cut at the low height required for grass.
Q5 What is the best ground speed for silage harvesting?
A5 Ground speed depends on crop density and moisture. The goal is to keep the harvester engine at rated power without plugging.
Q6 Where can I find replacement parts for a silage cutter header?
A6 Shijiazhuang Tianren Agricultural Machinery Equipment Co., Ltd supplies quality replacement parts and complete headers.
The silage cutter header is a vital part of silage harvesting equipment. It determines the quality of the cut, the consistency of the feed, and the overall efficiency of the harvest. By choosing the right header for the crop and maintaining it properly, farmers can achieve better silage quality and lower operating costs. Shijiazhuang Tianren Agricultural Machinery Equipment Co., Ltd is committed to providing reliable headers and parts for silage production. With proper care and adjustment, a silage cutter header will deliver many seasons of dependable service.