Custom Tie Rod Spring for Auto Reset Shank

1. Product Overview

Engineered to deliver consistent and reliable reset force in the most demanding agricultural tillage operations, our Tie Rod Spring for Auto Reset Shank ensures uninterrupted performance in the field. Precision-manufactured from high-grade 52CrMnMoV alloy steel, this spring is designed to absorb shock loads and instantly reset cultivator and plow shanks upon encountering subterranean obstacles like rocks or hardpan soil.

With superior fatigue resistance and advanced progressive winding geometry, it maintains linear force characteristics throughout its entire 120mm stroke range, maximizing the lifespan of your tillage equipment and minimizing downtime.

2. Detailed Parameters

3. Core Features

• Progressive Winding Geometry: Expertly designed to maintain perfectly linear force characteristics across the full 120mm stroke, guaranteeing smooth shank tripping and resetting.
• Unmatched Fatigue Life: Tested to exceed 500,000 cycles at 80% of its maximum load, ensuring years of reliable service in harsh field conditions.
• Superior Surface Protection: Surface treatments feature MIL-SPEC shot blasting (SAE J444) for optimal coating adhesion, with an optional Dacromet® coating available for extreme anti-corrosion performance (ideal for high-salinity soils or heavy fertilizer exposure).
• Rigorous Quality Assurance: Every batch undergoes comprehensive testing, including a 200% overload validation test, magnetic particle inspection (MPI) for internal material integrity, and CMM verification.

4. Manufacturing Process

Our tie rod springs are born from a state-of-the-art manufacturing pipeline to ensure absolute precision and metallurgical stability:

Precision Casting & Machining:

Formed via advanced investment casting to achieve an impressive ±0.15mm dimensional accuracy, followed by CNC machining of critical bearing surfaces down to strict ±0.03mm tolerances.

Advanced Thermal Cycling:

To achieve its uniform microstructure and HRC 34-38 hardness, the steel undergoes a complete thermal cycle:

• Normalizing: 900-920°C
• Annealing for stress relief
• Oil Quenching: 850°C
• Tempering: 540-600°C

5. Applications

This specialized tie rod spring is primarily designed for heavy-duty agricultural implements, specifically:

• Auto reset shanks on chisel plows and subsoilers.
• Heavy-duty field cultivators.
• Primary and secondary tillage equipment operating in rocky or uneven terrain.

6. Accessory Information

To ensure optimal integration, we also supply compatible hardware and accessories for complete shank assemblies, including:

1. Heavy-duty pivot pins and bushings.
2. Tension adjusting bolts and locking nuts.
3. Upper and lower mounting brackets.

(Note: Accessories can be bundled with bulk spring orders or purchased separately.)

7. Important Purchasing Considerations

When sourcing tie rod springs for your equipment, please be aware of the following:

• Environmental Exposure: Standard black baking varnish is suitable for most environments. However, if your equipment frequently operates in coastal regions, high-moisture areas, or fields with heavy chemical fertilizer application, we highly recommend upgrading to the Dacromet® coating for its 2,000+ hour salt spray resistance.
• Spring Rate Matching: Ensure the 150-220 N/mm spring rate matches the tripping force requirements of your specific implement to prevent premature shank tripping or equipment damage.
• Dimensional Verification: Always verify the uncompressed length and inner/outer diameter specifications against your existing OEM tie rod housings prior to placing bulk orders.

8. Common Industry & Buyer FAQs

Q1: Why use 52CrMnMoV alloy steel instead of standard spring steel?
A: 52CrMnMoV is a highly specialized alloy containing Chromium, Manganese, Molybdenum, and Vanadium. This specific blend offers vastly superior tensile strength, toughness, and thermal stability compared to standard carbon spring steels, making it ideal for the severe, repetitive impact loads experienced by auto reset shanks.

Q2: Are these springs customizable?
A: Yes. While our standard specification offers a spring rate of 150-220 N/mm and a 120mm stroke, our in-house engineering team can adjust coil pitch, wire diameter, and thermal treatments to meet your exact OEM custom specifications.

Q3: How do you guarantee the reliability of the springs under heavy load?
A: Quality is guaranteed through stringent IATF 16949-certified processes. Every production run is subjected to a 200% overload validation test and Magnetic Particle Inspection (MPI) to ensure there are zero micro-cracks or material defects that could lead to failure in the field.

Q4: Can I order sample units before placing a bulk B2B order?
A: Absolutely. We encourage buyers to request sample units to perform their own field testing and dimensional verifications. Please contact our sales team to arrange a sample shipment.