Suitable for manufacturing wear-resistant parts, sliding fits, shaft sleeves, bushings, bearing shells, worm gears, sliders, and copper alloy functional parts requiring friction reduction performance.
QSn6-6-3 Tin Bronze is a copper alloy material containing elements such as tin, zinc, and lead, featuring good wear resistance, corrosion resistance, anti-seizure, wear reduction, and machinability. It is commonly used in shaft sleeves, bushings, bearing shells, worm gears, sliders, wear-resistant plates, valve fittings, pump body fittings, and medium- and low-speed sliding friction parts. Compared to ordinary Brass, QSn6-6-3 Tin Bronze has better wear resistance and anti-occlusion ability; Compared toPure Copperand oxygen-free copper, it has weaker electrical and thermal conductivity, but is more suitable for wear-resistant and sliding fitting scenarios.
By focusing on application scenarios, boundaries of advantages, and non-recommended scenarios, it helps sales, customer service, and quoting staff quickly determine whether the material meets current part requirements.
It has good wear resistance, good friction reduction, good anti-segregation performance, good corrosion resistance, good machinability, suitable for sliding friction parts, shaft sleeves and bushings, and is more suitable for wear-resistant applications than ordinary Brass.
Shaft sleeves, bushings, bearing shells, sliders, wear-resistant plates, worm gears, low-speed gears, guide bushings, guide rail sliders, valve accessories, pump body parts, mechanical copper bushings, mining machinery parts, construction machinery parts, ship machinery parts, low-speed heavy-load sliding parts, medium- and low-speed friction accessory parts.
High conductivity copper busbars, high thermal conductivity heat dissipation components, high elasticity snap fasteners, high-strength load-bearing structural components, high-speed high-precision transmission parts, food direct contact parts, medical implants, children's products, strong acid and strong alkali environmental components, products with restrictions on lead-containing materials, and electronic components requiring extremely high conductivity.
The following parameters come from product information and material knowledge fields, used for design review, quotation communication, and preliminary judgment before material selection.
| Material positioning | Suitable for manufacturing wear-resistant parts, sliding fits, shaft sleeves, bushings, bearing shells, worm gears, sliders, and copper alloy functional parts requiring friction reduction performance. |
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| Precision performance | QSn6-6-3 Tin Bronze is suitable for CNC turning, boring, reaming, drilling, tapping, and precision machining, commonly used in parts such as bushings, bushings, sliders, and worm gears that require controlled fit dimensions. Actual accuracy is affected by material condition, tool, clamping method, hole diameter, wall thickness, machining heat, and post-processing. For inner holes, shaft holes, sliding surfaces, and assembly surfaces, it is recommended to separately control dimensional tolerances, roundness, coaxiality, and surface roughness. |
| Dimensional tolerances | The conventional dimensional tolerances of CNC machining QSn6-6-3 Tin Bronze can be referenced as ± 0.02mm to ±0.10mm, while ordinary structural parts can be evaluated at ±0.10mm-±0.20mm. Shaft sleeves, bushings, worm gears, sliders, and sliding fitting parts can be further controlled according to specific fitting requirements. This value is a standard reference range and does not guarantee absolute tolerances for all structures. Key mating surfaces should be separately marked with tolerances and roughness requirements. |
| Minimum Wall Thickness | The wall thickness of ordinary CNC machined structures is recommended to be no less than 1.0mm. Since this material is commonly used in shaft sleeves, bushings, and wear-resistant structures, it is not recommended to design the load-bearing positions, sliding fit positions, thread positions, and press-fitting positions to be too thin. Thin-walled shaft sleeves and large-diameter annular parts should focus on evaluating processing deformation, clamping deformation, compression deformation, and usage strength. |
| Recommended wall thickness | For ordinary structural parts, 1.5mm-3.0mm is recommended; for shaft sleeves, bushings, worm gears, sliders, wear-resistant plates, and load-bearing fitting positions, it is recommended to be above 2.0mm; for medium and low-speed sliding parts, press-fitted parts, and parts requiring oil groove drilling, thickness should be appropriately thickened according to load, speed, lubrication conditions, and fitting method. |
| Minimum aperture | CNC machining can achieve smaller hole diameters, but deep small holes, oil holes, and elongated holes require consideration of chip removal, burrs, and cleaning difficulty. For general designs, the recommended aperture is no less than 1.0mm. Shaft sleeve oil holes, lubrication holes, positioning holes, threaded holes, and assembly holes should be reasonably designed according to part dimensions, lubrication paths, and post-processing methods. After processing small oil holes, deburring and cleaning should be prioritized. |
| Assembly clearance | For ordinary metal assemblies, it is recommended to reserve 0.05mm-0.20mm on one side; for sliding fits and bushing parts, the clearance should be separately designed according to shaft diameter, load, speed, lubrication method, operating temperature, and thermal expansion. Unfinished surfaces are not recommended to be directly used as high-precision sliding mating surfaces. If plating, polishing, or sandblasting is needed later, dimensional allowances should be reserved according to the impact of surface treatment. |
| Detailed performance | QSn6-6-3 Tin Bronze suitable for machining holes, grooves, steps, chamfers, oil grooves, oil holes, threads, worm gear tooth surfaces, shaft hole mating surfaces, and wear-resistant structural details. The fit details after CNC machining, boring, and reaming are quite good. Overly fine sharp corners, thin edges, and tiny text may be weakened by material properties, burrs, or post-processing. Logos and markings are recommended to be achieved through laser marking, engraving, or etching. |
| Surface effect | QSn6-6-3 Tin Bronze original surface usually appears yellow-brown, bronze, or a deep golden-yellow metallic texture. After turning and milling, a brighter copper alloy surface is obtained; polishing enhances the metallic luster; and sandblasting produces a matte bronze finish. Long-term exposure to air, humidity, or oily environments may cause surface oxidation, darkening, or the formation of spots. If appearance stability is required, oxidation resistance, nickel plating, tin plating, or other surface protection treatments can be applied. |
Based on material characteristics and suitable product ranges, customer needs are broken down into easier application directions to determine.
Shaft sleeves, bushings, bearing shells, sliders, wear-resistant plates, worm gears, low-speed gears, guide bushings, guide rail sliders, valve accessories, pump body parts, mechanical copper bushings, mining machinery parts, construction machinery parts, ship machinery parts, low-speed heavy-load sliding parts, medium- and low-speed friction accessory parts.
Suitable for manufacturing wear-resistant parts, sliding fits, shaft sleeves, bushings, bearing shells, worm gears, sliders, and copper alloy functional parts requiring friction reduction performance.
The main features of QSn6-6-3 Tin Bronze are its suitability for sliding friction and wear resistance. In the material, tin helps improve wear and corrosion resistance, lead helps improve friction reduction and machinability, and zinc helps improve material manufacturability and cost balance. It is commonly used in mechanical parts that need to withstand certain pressure, low-speed, or medium-low speed sliding friction, but it is not suitable for structures with high electrical conductivity, high thermal conductivity, or high elasticity.
Based on wall thickness, hole position, assembly clearance, dimensional tolerances, and material usage risks, determine in advance whether the part structure is suitable for QSn6-6-3 Tin Bronze.
Post-processing of QSn6-6-3 Tin Bronze affects appearance, dimensions, hole position, assembly clearance, and usage validation results, and should be explained in advance during quotation, DFM review, and sample confirmation stages.
Post-processing should focus on appearance display, dimensional fitting, connection assembly, and testing verification. Parts involving assembly positions need to be reserved in advance for machining, coating, and trial assembly allowances.
For common issues such as threads, snaps, strength, temperature resistance, and weather resistance, identify in advance whether the material needs to be replaced or if another processing method should be used.
When customer demand exceeds QSn6-6-3 Tin Bronze material boundaries, it is necessary to combine strength, temperature resistance, toughness, long-term stability, and mass production goals to promptly recommend alternative materials or processing technologies.
If higher strength and better wear resistance are required, QAl9-4 Aluminum Bronze can be chosen; If higher electrical and thermal conductivity is required, Pure CopperT2, TU2 Oxygen-Free Copper, or C18150 Chromium Zirconium Copper can be chosen; If higher elasticity and fatigue life are needed, beryllium copper C17200 or phosphor bronze can be chosen; If lower cost and better machinability are needed, HPb59-1 lead Brass can be chosen; If higher corrosion resistance and structural strength are required,316L Stainless Steel or TC4 Titanium Alloy (Ti-6Al-4V) can be chosen.
If customers need wear-resistant sliding parts such as shaft sleeves, bushings, sliders, and worm gears, and the parts mainly operate at medium to low speeds, under moderate loads, and under lubricated conditions, QSn6-6-3 Tin Bronze is a more suitable choice. If customers mainly focus on electrical and thermal conductivity, they should choosePure Copper, oxygen-free copper, or chromium-zirconium copper; If customers have requirements for lead-in-content, environmental protection, food contact, or export regulations, they should confirm material compliance in advance, and switch to lead-free copper alloys or other materials if necessary.
After uploading 3D/2D drawings and supplementing materials, quantities, tolerances, surface treatments, and delivery requirements, XPartsLab will provide next steps in 3D printing manufacturability, cost, and delivery pathways.
