John Deere Square Baler Parts Knotter Knife arm DC 18315 Twine holder

John Deere DC 18315 Knotter Knife Arm

Precision OEM Replacement for Reliable Knotting

Direct replacement for worn parts – ensure your baler ties knots perfectly, season after season.

Design:
The DC 18315 Knotter Knife Arm integrates seamlessly with John Deere square balers, featuring an ergonomic shape that optimizes cutting motion and reduces twine slippage. Its counterbalanced structure minimizes vibration during high-speed baling, ensuring consistent knot formation and reducing wear on adjacent components. Precision-engineered pivot points align perfectly with the twine holder and billhook system, delivering reliable performance cycle after cycle.

Dimensions:
Manufactured to John Deere's OEM blueprint (tolerance: ±0.05mm), this knife arm ensures perfect synchronization with baler knotter kinematics. Critical dimensions include the 19mm Inner diameter, 175mm arm length. Such precision eliminates timing errors that cause missed knots or twine jams.

Load capacity:
Forged from SAE 4140 alloy steel and heat-treated to 45-50 HRC, the arm withstands 2,500+ lbs of cyclic tension during knot tightening. Finite Element Analysis (FEA) confirms its 8,000-hour fatigue life under maximum baling loads. Reinforced clevis joints and 10.9-grade mounting bolts prevent deformation at 60+ bales/hour operation.

Temperature resistance:
The cryo-treated pivot zone maintains dimensional stability from -20°F to 300°F (-29°C to 149°C). Specialized graphite-impregnated bushings absorb thermal expansion during extended operation, preventing binding in hot hay chambers. Zinc-nickel plating resists chemical corrosion from humid silage environments.

High Precision
Produced using CNC machining, precision milling, heat treatment, and electroplating technologies, each part meets strict standards for dimensional accuracy, material strength, and surface finish. Quality is controlled at every stage to ensure consistent and high-performance output.

Excellent Cost-Effectiveness
As a direct manufacturing factory, we offer products with OEM-level quality at a more competitive price. With no compromise on materials or performance, our parts are an ideal alternative for maintenance and replacement needs—helping reduce operating costs and increase return on equipment investment.

Large Inventory & Fast Delivery
Most parts are kept in stock and available for fast shipment. We also provide responsive technical support and reliable after-sales service, ensuring a smooth and worry-free purchasing experience for every customer.