Non-Magnetic WC-Ni Alloy Ejector Pin Guide Bushing for High Precision Injection Molding
Price:
Negotiable
MOQ:
2
Delivery Time:
5-30days
Brand:
Sanxin
Product Description
Non-Magnetic Carbide Ejector Pin Guide Bushing
WC-Ni Alloy Precision Mold Guide for Injection Molding
Product Overview
In high-precision injection molding, ejector pin guide bushings ensure smooth ejection, maintain part quality, and extend mold life. For magnetic-sensitive materials or EMI-sensitive environments, standard steel bushings risk magnetic contamination and premature wear.
Our Non-Magnetic Carbide Ejector Pin Guide Bushings solve these challenges using specialized WC-Ni (Tungsten Carbide-Nickel) alloy, delivering absolute magnetic neutrality, exceptional wear resistance, and micron-level precision.
Core Technology & Design Advantages
- Guaranteed Non-Magnetic Performance (µ < 1.002) - Nickel-based binder eliminates ferromagnetic elements, ensuring zero magnetic attraction and no interference with sensitive magnetic fields
- Exceptional Wear Resistance - 90-92 HRA hardness provides 50-100x longer life than tool steel, reducing maintenance and total cost of ownership
- Superior Surface Finish - Mirror finishes down to Ra 0.1-0.2 μm minimize friction and particle generation
- Optimized Ejector Pin Support - Precision-matched clearances (0.005-0.015mm) and balanced wall thickness prevent pin deflection and failure
Technical Specifications
| Parameter | Standard Capability | High-Precision Option |
|---|---|---|
| Material | WC-Ni Non-Magnetic Alloy | Multiple grades for wear/corrosion balance |
| Hardness | 90-92 HRA | Consistent throughout |
| Inner Diameter (ID) Range | Φ1 mm - Φ50 mm | Custom sizes available |
| ID Tolerance | H6 / h6 (±0.004 mm) | H4 / h4 (±0.002 mm) or tighter |
| Outer Diameter (OD) Tolerance | g6 / h6 (±0.004 mm) | Custom fit per mold base |
| Concentricity (ID to OD) | ≤ 0.005 mm | ≤ 0.003 mm |
| Surface Finish (Bore) | Ra 0.4 μm (Ground) | Ra 0.1-0.2 μm (Lapped/Polished) |
| Special Features | Lubrication grooves, flanges, stepped ODs, headless styles available | |
Performance Comparison
| Property | Non-Magnetic Carbide Bushing | Hardened Steel Bushing (SKD61) | Standard Carbide Bushing (WC-Co) |
|---|---|---|---|
| Magnetic Permeability | < 1.002 (Non-Magnetic) | > 100 (Highly Magnetic) | 1.5-2.0 (Magnetic) |
| Hardness | 90-92 HRA | 50-55 HRC | 90-92 HRA |
| Wear Life | Millions of cycles | Moderate | Exceptional |
| Corrosion Resistance | Excellent (Ni binder) | Good | Good |
| Thermal Conductivity | High (similar to BeCu) | Moderate | High |
| Ideal Application | Medical, electronics, ferrite molding | General purpose | Not for magnetic-sensitive uses |
Critical Functions in Mold Guiding
- Connect and align ejector plates with mold base for accurate pin alignment
- Maintain optimal pin-to-bushing clearance to prevent binding or excessive wear
- Withstand lateral forces that cause pin deflection, bending, or breakage
- Extend mold life by reducing wear on ejector pins and mold plates
Target Applications & Industries
| Industry | Application | Benefits |
|---|---|---|
| Medical Device Molding | Syringe components, implantable parts, diagnostic consumables | Zero magnetic contamination, cleanroom compatibility, corrosion resistance |
| Magnetic Material Molding | Ferrite cores, magnetic polymer components, bonded magnets | Absolute non-magnetic property prevents material magnetization |
| Electronics & Connectors | Precision connectors, micro-switches, sensor housings | Wear resistance for glass-filled materials, consistent ejection |
| Optical Component Molding | Lens holders, light guides, precision optical parts | Mirror-finished bore prevents scoring and particle generation |
| High-Volume Precision Parts | Automotive electronics, consumer goods | Extended tool life reduces maintenance downtime |
Material Options & Customization
| Grade | Ni (wt%) | Density (g/cm³) | Hardness (HRA) | Application |
|---|---|---|---|---|
| XN100 | 6.5-7.5 | 14.5-14.8 | 88.5-91.0 | General-purpose, corrosion-resistant |
| XN101 | 6.5-7.5 | 14.5-14.8 | 88.5-91.0 | Higher strength, wear-resistant |
| XN300 | 10.0-11.0 | 14.2-14.6 | 86.5-89.5 | Maximum toughness |
| XN301 | 10.0-11.0 | 14.2-14.6 | 86.5-89.5 | High toughness + wear resistance |
Ready to Upgrade Your Mold's Performance with Non-Magnetic Carbide Guide Bushings?
Contact us today for a technical consultation or a customized quotation.
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Zhuzhou Sanxin Cemented Carbide Manufacturing Co., Ltd
Location
No. 8, Middle School Road, Baiguan Town, Lusong District, Zhuzhou, Hunan, China
Contact Person
Anne Zhang