Precision CNC Machining for Bakelite – High‑Strength Phenolic Resin Parts
Bakelite CNC machining is widely used for producing high‑strength, electrically insulating components. Bakelite (phenolic resin) is a thermoset plastic known for its excellent heat resistance, dimensional stability, and mechanical strength. At Ranglink, we specialize in custom Bakelite machining – from gears and handles to electrical switchgear parts.
– Excellent electrical insulation (high dielectric strength).
– Good heat resistance (up to ~120°C continuous).
– High mechanical strength and rigidity.
– Low moisture absorption and excellent dimensional stability.
– Good machinability (produces fine powder, not chips).
– Widely used in electrical, automotive, and industrial applications.
Key Properties of Bakelite (Phenolic Resin)
| Property | Value / Rating |
|---|---|
| Dielectric strength | ~10–20 kV/mm (excellent insulation) |
| Volume resistivity | 10¹⁰ – 10¹² Ω·cm |
| Tensile strength | ~50–70 MPa |
| Flexural strength | ~80–120 MPa |
| Compressive strength | ~150–200 MPa |
| Heat deflection temperature (1.82 MPa) | ~120°C – 150°C |
| Continuous use temperature | –20°C to 120°C |
| Density | 1.3–1.4 g/cm³ |
| Water absorption (24h) | ≤ 0.3% (low) |
| Machinability rating | Good (use carbide tools, dust extraction required) |
Our CNC Machining Capabilities for Bakelite
| Parameter | Specification |
|---|---|
| Max part size (milling) | 1100 × 600 × 500 mm |
| Max turning diameter | Ø230 mm |
| Standard tolerance | ±0.05 mm |
| Precision tolerance | ±0.005 mm (on request) |
| Surface roughness (as machined) | Ra 1.6 μm (polishing available) |
| Lead time (prototypes) | 3 business days |
Processes available: CNC Milling (3‑axis, 4‑axis, 5‑axis) · CNC Turning · CNC Drilling & Tapping · Routing · Surface grinding (for tight flatness).
Surface Treatment & Post‑Processing for Bakelite
Note: Bakelite does not require sealing or coating for most electrical applications. For outdoor use, apply UV‑resistant paint to prevent surface chalking.
Common Applications of CNC Machined Bakelite
Quality Assurance
- ISO 9001:2015 certified – audited quality management system.
- Full traceability – material certificates and inspection reports.
- Inspection equipment – CMM, calipers, micrometers, hardness tester.
- Every part inspected – we verify dimensions, edge quality, and insulation properties.
Why Choose Ranglink for Bakelite CNC Machining?
Ready to Start Your Bakelite CNC Machining Project?
👇 Upload your CAD file (STEP, IGES, STL, SolidWorks) for a free quote within 24 hours.