In the muddy furrows for agricultural machinery and the complex road conditions for automotive chassis, every operation relies on precise support from core components. As the "joints" of equipment transmission systems, bushings and sleeves directly determine the reliability, service life, and operational safety of equipment. We specialize in precision manufacturing, crafting high-performance bushings and sleeves tailored for agricultural machinery and automotive chassis through premium material selection, advanced processes, and rigorous standards, delivering rock-solid power guarantee for various equipment.
Material is the starting point of product performance. Based on load requirements of different application scenarios, we carefully select three core alloy materials to achieve precise matching between materials and working conditions:
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Gr15 Bearing Steel: A high-purity wear-resistant steel with uniform microstructure and excellent hardenability. It is an ideal choice for high-frequency rotating components, with surface hardness reaching HRC60-66, effectively resisting friction and extending continuous operation time of equipment.
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20CrMnTi Alloy Structural Steel: Innately possesses excellent carburizing performance. After professional processing, it forms a "hard exterior and tough core" characteristic, with surface hardness up to HRC58-62 and core maintaining good toughness, easily coping with impact loads.
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42CrMo High-Strength Alloy Steel: Combines high strength and high fatigue strength. After quenching and tempering, it boasts outstanding comprehensive mechanical properties, capable of withstanding complex bending and torsional loads, making it the core material for load-bearing components of automotive chassis.
Performance breakthroughs depend on advanced processes. We adopt four core heat treatment technologies to directionally enhance material performance, ensuring every product meets rigorous standards:
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Carburizing Treatment: Deep carburizing for materials like 20CrMnTi forms a dense hardened layer on the part surface, significantly improving wear resistance and contact fatigue strength. It perfectly adapts to impact working conditions of agricultural machinery during plowing and dynamic loads of automotive chassis.
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Vacuum Quenching: Precise temperature-controlled quenching in a vacuum environment avoids oxidation and decarburization, enabling materials to obtain uniform hardness distribution and excellent toughness, ensuring structural stability of components under extreme working conditions.
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Induction Hardening: Local high-frequency induction hardening for key working surfaces of 42CrMo precisely strengthens stress-bearing areas. While reducing material loss, it ensures high-strength performance of core parts to meet precision transmission requirements.
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Cryogenic Treatment: Ultra-low temperature cryogenic treatment at -196°C for quenched materials like Gr15 promotes full transformation of retained austenite, refines carbide particles, further improves material hardness, wear resistance and dimensional stability, reduces deformation risk during long-term use, and provides long-term guarantee for high-precision transmission.
Backed by premium material selection and precision manufacturing, our bushings and sleeves offer "five core advantages" to fully meet performance requirements of agricultural machinery and automotive chassis:
| High Strength: Multi-purpose furnace heat treatment ensures product stability. Significantly improved tensile strength and fatigue resistance enable it to withstand complex loads during heavy-duty operation of agricultural machinery and high-speed driving of automobiles, eliminating fracture risks.
High Wear Resistance: Carburized 20CrMnTi provides wear protection, extending service life of agricultural machinery in dusty and muddy environments by over 30% and reducing maintenance costs. | High Precision: Complies with GB/T18324-2001 standard. Combined with excellent dimensional stability from cryogenic treatment, dimensional deviation is controlled within h9 grade, and surface roughness Ra ≤ 0.8μm, ensuring accurate assembly.
High Parallelism & Concentricity: Through precision processing and testing, geometric tolerance is controlled at 50%-70% of dimensional tolerance, reducing vibration of automotive chassis and transmission loss of agricultural machinery, and improving operational stability. |
We deeply analyze core needs of two major application fields and provide targeted solutions, making every product a reliable barrier for equipment:
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Agricultural Machinery Special: For harsh working conditions of tractors, harvesters and other equipment, 20CrMnTi + carburizing process or Gr15 material is selected. Its high wear resistance and impact resistance cope with dust, vibration and heavy loads in field operations, ensuring continuous operation during critical agricultural periods and reducing downtime losses.
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Automotive Chassis Special: Customized high-precision bushings and sleeves for key components such as transmission systems. After vacuum quenching and cryogenic treatment, they possess excellent strength, toughness and dimensional stability. Combined with high-precision characteristics, they effectively improve vehicle NVH performance, reduce driving vibration, and ensure driving safety and comfort.
From farmland to urban roads, our bushings and sleeves consistently interpret quality commitment with stable performance. We support customized production according to equipment models and working condition requirements, following a closed-loop standard of "raw material inspection - process control - finished product testing" throughout the whole process to ensure every product meets industry specifications. Contact us now to get exclusive solutions and let core components become a solid backing for equipment upgrade!
TEL：+86 576 81719318 
EMAIL：info@86shunji.com 187300500@qq.com
ADD：Building 46, Phase II, Chuangrong Industrial City, Yucheng Street, Yuhuan City, Zhejiang Province, China
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