QSN12-2 RG12 Tin Bronze Bushings And Bearings 12-2

QSN12-2 RG12 Tin Bronze Bushings and Bearings 12-2 uses a high-tin bronze alloy formula, containing 11%-13% tin, 0.1%-0.4% phosphorus, and 1.5%-2.5% nickel. Formed through precision casting, it boasts five core performance advantages that lead the industry, completely solving the pain points of ordinary bearings such as poor wear resistance, susceptibility to corrosion, low strength, and poor high-temperature resistance.

• Superior wear resistance, doubled lifespan: The high tin content forms a hard Cu₃Sn phase with a low coefficient of friction, making it less prone to wear and seizing in high-load sliding/rolling friction pairs. Suitable for loads below 20MPa and sliding speeds of 8m/s, its bearing life is increased by more than 30% compared to ordinary tin bronze.

• Excellent corrosion resistance, suitable for harsh environments: Corrosion rate <0.02mm/year in seawater, fresh water, steam, and weak acid/alkali environments, effectively resisting marine salt spray and chemical media corrosion. Long-term use shows no rust or deformation, suitable for harsh environments such as ships, chemical plants, and marine equipment.

• High strength and high fatigue limit, worry-free load-bearing capacity: Cast tensile strength ≥550MPa, reaching 700MPa after heat treatment, fatigue limit 260MPa (10⁷ cycles), hardness HB180-220, capable of withstanding heavy loads and impact loads, without denting or deformation under long-term load.

• Good casting and machining performance, controllable precision: Trace amounts of phosphorus enhance alloy fluidity, facilitating precision casting, resulting in dense, porosity-free finished products; simultaneously possessing excellent turning and grinding performance, capable of machining complex structures with dimensional accuracy up to ±0.01mm, suitable for the assembly needs of various precision equipment.

• High temperature stability and tolerance to extreme temperatures: It can work continuously in an environment of 300℃, withstand short-term high temperatures of 350℃, and does not soften or degrade in performance at high temperatures. It is suitable for high-temperature components such as engines, turbines, and rolling mills.

Superior Product Performance

1. Carefully Selected Raw Materials, Guaranteed Purity: High-purity electrolytic copper, high-purity tin, nickel, and phosphorus are selected as raw materials. Strict control over chemical composition ratios eliminates impurities, ensuring stable alloy performance from the source and conforming to QSN12-2/RG12 international standards.

2. Medium-Frequency Furnace Melting, Uniform Alloy: 25 medium-frequency furnaces are used for precise temperature control melting, with a temperature error ≤ ±5℃. This ensures full fusion and uniform distribution of alloy elements, avoiding component segregation and improving material consistency and stability.

3. Precision Casting, Dense Formation: 50 dedicated casting machines utilize sand casting/metal mold casting processes, adaptable to different sizes and batch requirements. Temperature control is maintained throughout the casting process, resulting in finished products free of porosity, shrinkage, and slag inclusions, with a dense microstructure and excellent mechanical properties.

4. Precision Machining, Meeting Standards: 30 CNC lathes, grinders, and other precision machining equipment are used to precisely machine castings, ensuring coaxiality of inner and outer circles ≤0.02mm, surface roughness Ra≤1.6μm, and dimensional errors strictly controlled within 0.5mm on each side, guaranteeing accurate assembly and smooth operation.

5.Multiple Quality Inspections, Qualified Products for Shipment: Chemical composition is tested using a spectrometer, internal defects are detected using a flaw detector, and mechanical properties are tested using a hardness tester/tensile testing machine. Five professional testing devices perform comprehensive testing, and a quality inspection report is issued for each batch of products. Unqualified products are resolutely rejected from the factory.

Common Models and Customization Services

• Standard Models: Standard bushings and bearings covering inner diameters of 20mm-500mm, outer diameters of 30mm-600mm, and lengths of 50mm-800mm. Sufficient stock and fast delivery.

• Customized Models: Supports non-standard sizes, special tolerances, and special structures (with oil grooves, flanges, through holes, etc.). Production can be based on customer drawings/samples. Material can be fine-tuned (e.g., adjusting tin/nickel content to suit special operating conditions). Delivery time is 7-15 days.

Backed by 30 Years of Experience, Worry-Free Cooperation

Choosing QSN12-2 RG12 Tin Bronze Bushings and Bearings 12-2 will bring you multiple core values and comprehensive cooperation guarantees, completely eliminating procurement concerns and achieving long-term stable cooperation.

Cost Reduction and Efficiency Enhancement, High Cost-Effectiveness: Long product lifespan, wear and corrosion resistance, reducing equipment downtime for maintenance and lowering operating costs; factory direct supply, prices are 30% lower than imported products, leading the industry in cost-effectiveness.

Customized Services, Adapting to Needs: 30 years of industry experience allows us to customize products according to customer operating conditions (load, temperature, media), meeting personalized needs across all dimensions from material, size, tolerances to delivery date.

Ample Production Capacity, Fast Delivery: 46,000 tons annual production capacity, 50 casting machines, and 30 machining machines; regular orders are shipped within 7 days, and customized orders are delivered within 15 days, solving customers' tight deadline challenges.

• Quality Assurance, Worry-Free After-Sales Service: End-to-end quality inspection, 12-month product warranty. Free returns and exchanges with shipping costs borne by the customer for any quality issues within the warranty period. A professional technical team provides 24-hour technical support to assist customers with product selection, installation, and adaptation to operating conditions.

• Physical Factory, Worry-Free Inspection: A 30-year established company with a 50,000-square-meter factory, 4 casting workshops, and 2 machining workshops. Customers are welcome to conduct factory inspections at any time to inspect the production process and quality control system, ensuring a more reliable partnership.