Product Category

　　Product Highlights
　　1. High-manganese steel casting with water toughening: The working surface of the bushing hardens rapidly upon impact, while the core retains high toughness to prevent brittle fracture, providing a balance of friction reduction, load-bearing capacity, and impact resistance.
　　2. Its service life far exceeds that of standard steel liners, significantly reducing replacement frequency and downtime costs; it is suitable for a variety of crushing equipment, including jaw crushers, cone crushers, and gyratory crushers.
　　3. Full‑process nondestructive testing: direct‑reading optical emission spectroscopy for chemical analysis, magnetic particle inspection (MT), and three‑coordinate full‑dimensional measurement; each batch is accompanied by a material certificate, a mechanical property report, and an NDT inspection report.
　　User Pain Points
　　Sleeves are critical wear-resistant components in the rotating parts of equipment such as jaw crushers, cone crushers, and gyratory crushers. Conventional steel sleeves have poor toughness; they deform and crack under impact, leading to spindle wear or even seizure. As the inner bore wears, clearance increases, compromising crushing accuracy and capacity. Internal defects remain undetected, posing a risk of fracture.
　　Solution
　　High-manganese steel bushings, with a service life far exceeding that of conventional steel bushings, undergo water‑tempering treatment to achieve a “hard‑on‑the‑outside, tough‑on‑the‑inside” performance—resulting in impact‑hardened working surfaces while maintaining toughness in the core. Each batch is subjected to MT magnetic particle inspection and three‑coordinate full‑dimensional measurement, accompanied by a complete quality report, ensuring full traceability throughout the production process.
　　I. Product Description
　　High-manganese steel bushings are critical wear-resistant components in the rotating parts of mining crushing equipment, suitable for jaw crushers (eccentric bushings, drive shaft sleeves), cone crushers (eccentric bushings, main shaft sleeves, spherical bearing sleeves), and gyratory crushers (eccentric sleeves, main shaft sleeves). The base materials include grades such as ZG120Mn13, ZG120Mn13Cr2, and ZG120Mn18Cr2, manufactured via high-manganese steel casting combined with water‑toughening treatment.
　　II. Product Specification Sheet

　　III. Product Features and Advantages
　　1. Made of high-manganese steel, hard on the outside and tough on the inside: After water toughening, the working surface rapidly hardens upon impact while the core retains high toughness, providing both wear resistance and impact resistance to prevent deformation and cracking.
　　2. Service life far exceeds that of standard steel sleeves: significantly reduces the frequency of spare-part replacements, lowers production losses and labor costs associated with downtime for replacement, and delivers substantial overall economic benefits.
　　3. Wide applicability: Compatible with mainstream models such as jaw crushers, cone crushers, and gyratory crushers, covering a variety of components including eccentric shaft sleeves, transmission shaft bushings, main shaft sleeves, and spherical bearing sleeves.
　　IV. Why Choose Us
　　• Specializing in wear-resistant castings for harsh operating conditions: Rooted in China, we focus on the R&D and manufacturing of wear-resistant castings for demanding environments such as mining and power generation. Take crusher shaft sleeves as an example: specifically optimized for high-impact, high-wear conditions in rotating parts of jaw crushers, cone crushers, gyratory crushers, and other equipment. Our high-manganese steel undergoes water toughening, resulting in impact hardening on the working surface while maintaining toughness at the core, delivering a service life 3–5 times longer than standard steel sleeves. Each batch undergoes MT magnetic particle inspection and full‑dimensional CMM testing, accompanied by a complete quality report, thereby reducing downtime risks at the source.
　　• We let the test data speak for itself, rather than merely talking about perfection: Casting processes are complex; we do not promise “zero defects,” but we do promise “zero excuses.” Each batch of crusher shaft sleeves undergoes a full inspection process—including hardness testing, precise dimensional measurement, and magnetic particle inspection—to ensure accurate dimensions of the inner bore, outer diameter, and mating surfaces, thereby eliminating the risk of fracture caused by internal defects. Complete test reports are provided, demonstrating our accountability through data and action.
　　• Long-term partnerships—delivery is just the beginning: Our digital systems let you track production progress in real time, eliminating opaque operations; we respond immediately to quality concerns without delay; and every shipment includes a detailed test report for your quality records. We believe that a supplier’s attitude toward resolving issues truly reflects its value.
　　V. Production and Quality Assurance
　　• Premium Raw Materials: Carefully selected high-quality scrap steel—free of rust and oil—is used to produce the punch‑type steel pellets, ensuring that the crusher shaft sleeves are made from exceptionally pure material and laying the foundation for work‑hardening in high‑manganese steel.
　　• Ultimate density: Ceramic sand combined with a large-diameter riser ensures the elimination of shrinkage porosity and cavities; the sleeve’s interior is densely compacted, enabling it to withstand high impact and cyclic loads without cracking.
　　• Precision melting: Melted in a Fuji electric furnace from Japan, with real-time compositional verification via spectrometer to precisely control carbon and manganese levels, ensuring work-hardening capability and impact toughness.
　　• Flawless casting: 850°C package baking plus bottom-pouring process eliminates sand-hole defects; the sleeve’s working and contact surfaces are smooth and free of casting imperfections.
　　• Strengthened metallography: 30-second rapid quenching produces a uniform austenitic microstructure, achieving “hard exterior, tough interior”—the surface is hardened to HB500–600, while the core retains high toughness, enabling it to withstand repeated impacts without fracturing.
　　• Powerful shot blasting: removes surface sand and hardens the surface, enhancing the wear resistance of the bearing sleeve’s working face.
　　• Rigorous quality inspection: magnetic particle testing plus precise dimensional measurement ensure accurate dimensions of the bushing’s inner bore, outer diameter, and mating surfaces, eliminating the risk of fracture caused by internal defects.
　　• Transparent delivery: Scan a code to track progress in real time, with full visibility from material input to shipment.
　　VI. Frequently Asked Questions (FAQ)
　　Q1: What is the minimum order quantity for crusher shaft sleeves?
　　Individual items are available for order; bulk purchase prices are discounted.
　　Q2: What is the delivery time?
　　Custom orders based on provided designs typically take 45–60 days; expedited processing can be arranged for urgent needs.
　　Q3: What packaging options are supported?
　　Iron bracket fixation plus stretch film or wooden crate packaging, suitable for sea and land transportation.
　　Q4: Can the customer’s logo be printed on the packaging?
　　Yes, you can cast the lettering on the non‑working surface of the casting.
　　Q5: What payment methods are supported?
　　Telegraphic Transfer (T/T) or Letter of Credit (L/C); for first-time cooperation, T/T is recommended, but phased payments can also be negotiated.
　　Q6: What should be considered when installing a bushing?
　　Before installation, clean the spindle and the shaft sleeve mounting area to ensure there are no burrs or contaminants; during installation, pay attention to fit tolerances and lubrication conditions; it is recommended that installation be performed by qualified personnel or with technical guidance.