Contact Us 
SUS304 Stainless Steel + C11000 Copper Flange Guide Bushing
This two-stage flanged guide sleeve is precision CNC turned for mechanical automation and injection mold equipment, consisting of SUS304 stainless steel integrated flange body and an interference fitted pure copper wear isolation ring between upper and lower cylindrical segments. It serves as a low-friction positioning guide component for ejector pins, moving shafts and mold core pins.
- Material: SUS304 Stainless Steel + C11000 Pure Red Copper
- Hardness: HB 150–185 (SUS304); HB 80–90 (C11000 Copper)
- Tolerance: ±0.0015 mm
- Surface Finish: Fine Linear Brushed Stainless Steel + Polished Copper Buffer Ring
Get Free Quote 
Flanged Composite Guide Sleeve Engineering
Dual-section stepped cylindrical structure with through precision inner bore ensures high coaxiality for reciprocating moving shafts. The intermediate copper ring acts as a self-lubricating friction isolation layer to avoid direct metal contact between the sleeve and moving parts, lowering friction coefficient and eliminating frequent grease maintenance. Multi-hole symmetrical flange base provides uniform bolt fastening force, preventing tilting during high-cycle linear sliding. The integral stainless steel body delivers high structural rigidity to resist axial bending deformation under continuous reciprocating impact, maintaining stable positioning accuracy over millions of production cycles.
Dual Composite Material Performance Advantages
The combination of stainless steel and pure copper balances structural strength and self-lubricating heat dissipation performance:
- SUS304 Stainless Steel Main Body: Excellent rust and chemical corrosion resistance, suitable for humid mold workshops, medical and food automation lines; high compressive rigidity to withstand long-term clamping and impact loads
- C11000 Pure Copper Intermediate Ring: Ultra-high thermal conductivity rapidly dissipates friction heat generated by high-speed shaft sliding; inherent self-lubricating property reduces abrasion and galling of matching shafts
- Interference press-fit assembly prevents copper ring displacement under temperature fluctuations and circulating cooling water pressure, matched thermal expansion avoids assembly gap failure Ideal for injection mold ejector guide, robotic positioning shaft sleeves and precision automated conveying equipment.
Custom Guide Sleeve Machining Support
- Custom flange outer diameter, upper/lower cylinder length, inner bore size and mounting hole layout based on customer 2D/3D CAD drawings
- Optional surface upgrades: Mirror Polishing, Anti-Fingerprint Passivation, Hard Chrome Plating
- DFM consultation: clearance fit / interference fit tolerance matching, heat dissipation optimization, wear ring thickness customization
- Fast prototype sampling and mass batch delivery for mold and automation equipment upgrade projects
Key Features & Advantages
- Copper Self-Lubricating Buffer Ring: Separates metal friction surfaces, reduces wear and extends service life without frequent lubrication.
- Double-Step Flange Integrated Structure: Two-stage cylinder adapts to multi-plate mold and fixture installation, symmetrical flange ensures flat mounting.
- Full Anti-Corrosion Stainless Steel Shell: Works stably in damp, cutting fluid splashing and hygienic production environments without rust.
- Ultra-High Coaxial Precision: Precision turning guarantees consistent inner bore roundness for smooth jitter-free linear sliding.
- Fully Customizable Dimensions: Adjust bore diameter, flange size and copper ring width to match unique shaft positioning requirements.
Technical Specifications
| Parameter | Specification |
|---|---|
| Main Body Material | SUS304 Stainless Steel |
| Wear Buffer Ring Material | C11000 Pure Red Copper |
| Alternative Materials | SUS316 Stainless Steel, BeCu Beryllium Copper |
| Hardness | HB 150–185 (SUS304); HB 80–90 (C11000) |
| Dimensional Tolerance | ±0.0015mm for inner bore, outer diameter and flange flatness |
| Inner Bore Coaxiality | ≤0.002mm per 100mm sleeve length |
| Surface Roughness | Ra ≤0.4μm brushed stainless steel; Ra ≤0.2μm polished copper |
| Manufacturing Processes | CNC Turning, Precision Boring, Copper Ring Press-Fitting, Deburring, Surface Brushing |
| Surface Treatments | Anti-Rust Passivation, Mirror Polishing, Hard Chrome Plating |
| Customization | 100% Fully Customized via CAD Drawings & Shaft Samples |
Applications
Injection Molds
Flange guide sleeves for ejector pins and core pins in multi-cavity plastic molds. Copper heat conduction ring dissipates friction heat from repeated ejection, stainless steel resists rust from mold cooling water.
Electronic Assembly Automation Lines
Positioning shaft sleeves for robotic feeding and connector assembly stations. Lightweight corrosion-resistant structure avoids magnetic interference with micro electronic components.
Medical Automated Testing Equipment
SUS304 food/hygiene grade stainless steel meets medical standards, used for guide sleeves of disposable medical part inspection machines, resisting disinfectant corrosion.
Food Packaging Conveying Machinery
Passivated stainless steel guide bushings for food filling and packaging equipment, compliant with food contact safety requirements and resistant to grease and water erosion.
Precision Stamping Auxiliary Dies
Locating pin guide sleeves for continuous thin sheet stamping molds, self-lubricating copper ring reduces fixture maintenance frequency for high-speed stamping mass production.
