Multi-Crop Thresher: Types, Operation, Safety & SMAM Subsidy

Threshing cylinder types and multi-crop adaptability

• Spike-tooth (peg-tooth) cylinders: Standard design using hardened steel pegs, versatile for wheat, barley, gram, and soybean.
• Beater (syndicator) cylinders: High-capacity rotating beaters that chop straw into fine bhusa (chaff) for cattle fodder while separating grains.
• Rasp-bar cylinders: Gentle rub-action cylinders ideal for crops prone to seed coat cracking, such as soybean and certified seed crops.
• Crop changeover adjustments: Swapping cleaning sieves, adjusting air blower damper vanes, and changing pulley ratios to regulate cylinder RPM.

Cleaning and aspiration mechanisms

• Centrifugal aspiration blower: Generates strong airflow that lifts and blows away light chaff, dust, and empty hulls.
• Reciprocating sieve screen: Vibrating dual-sieve system separating clean bold grain from unthreshed pods and heavy foreign matter.
• Bhusa blower pipe: Directs finely chopped livestock straw directly into storage rooms or trailers.

Safe operation guidelines and subsidies

Operators must strictly avoid wearing loose clothing or shawls near spinning drive belts and PTO shafts. Feeding chutes must comply with Bureau of Indian Standards (BIS) safety feeding chute dimensions to prevent accidental hand injuries. Subsidies are accessible through state DBT agriculture mechanization portals and the national SMAM portal (agrimachinery.nic.in).

Related on KisanPe

• Farm Equipment Directory →
• Wheat Farmers Hub →
• Custom Hiring Centers →
• Subsidy calculator →

Common questions

General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.