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SKD61 Step Guide Bushing with Bronze Wear Sleeve
- Material: SKD61 Hot Work Tool Steel
- Hardness: HRC 48–52 for SKD61 substrate
- Tolerance: ±0.001 mm for inner bore and outer fitting diameters
- Surface Finish: Fine Ground exterior,
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High-Precision Engineering
Multi-step flange outer profile enables accurate stacking positioning inside mold plates, ensuring consistent installation depth and concentric alignment across mold assemblies. Self-lubricating bronze inner liner reduces metal-to-metal friction, drastically lowering wear rate for reciprocating guide post movement. The thick flange base disperses clamping impact load, avoiding deformation under repeated mold opening/closing shock force. Interchangeable bronze sleeves can be replaced separately without scrapping the whole steel guide body, cutting maintenance expenditure.
Heat-Resistant SKD61 Steel Substrate Advantages
The outer stepped body uses premium SKD61 hot work tool steel for reliable high-temperature performance:
- Strong thermal fatigue resistance for sustained elevated mold temperatures in die casting and hot injection molding
- Low thermal expansion rate to preserve tight fit tolerance under cyclic heating and cooling
- Balanced hardness and impact toughness to resist cracking from repeated mold impact loads
- Excellent structural rigidity to maintain roundness and concentricity under heavy radial load
Key Features & Advantages
- Dual-Material Wear Protection: Bronze liner takes sliding friction load, protecting expensive SKD61 main body from abrasion.
- High-Temperature Stability: SKD61 base retains precision geometry even under continuous hot mold cycling.
- Low-Maintenance Design: Only bronze sleeves need periodic replacement, extending overall component service life.
- Stackable Step Positioning: Multi-flange stepped structure delivers accurate depth control during mold plate assembly.
Technical Specifications
| Parameter | Specification |
|---|---|
| Main Body Material | SKD61 Hot Work Tool Steel |
| Inner Wear Liner | Self-Lubricating Bronze Alloy |
| SKD61 Heat Treated Hardness | HRC 48–52 |
| Bore & Outer Diameter Tolerance | ±0.001mm |
| Whole-Part Concentricity | ≤0.002mm |
| Surface Roughness | Ra ≤0.04μm (Ground Outer), Ra ≤0.02μm (Honed Bore) |
| Manufacturing Processes | CNC Turning, Cylindrical Grinding, Inner Honing, Heat Treatment, Press Fitting |
| Surface Treatments | Ion Nitriding, TiN Coating, Precision Grinding |
| Customization | 100% Supported via Drawings & Samples |
Applications
Automotive Manufacturing
Used as guide assemblies for automotive aluminum die casting molds and glass-filled plastic injection molds; SKD61 withstands high mold temperatures from metal casting and high-volume auto component molding cycles.
Medical Production Molds
Applied in precision injection mold guide systems for rigid medical device housings and disposable fitting parts; can upgrade to S136 steel variant when molding corrosive PVC medical resins.
Consumer Electronics Fabrication
Deployed in high-cycle injection molds for miniature electronic frames, connector shells and battery housing plastic parts, stable guiding ensures consistent precision for tiny electronic molded geometries.
General Plastic Packaging
Ideal for high-speed packaging cap and container mold guide components, bronze self-lubricating liner supports non-stop fast cycle mass packaging production lines.
Industrial Automated Fixturing
Utilized as positioning guide sleeves on automated CNC clamping fixtures and assembly tooling, reliable concentric positioning boosts repeat accuracy for batch metal and plastic workpiece machining.
