Product Overview
Bakelite (phenolic laminated paper/cotton-fabric board) is a thermosetting composite made by laminating phenolic-resin-impregnated insulating paper or cotton cloth under high temperature and pressure. With excellent electrical insulation, good machinability and outstanding value for money, it is one of the most widely used engineering materials in industrial jigs and fixtures. In CNC machine fixture baseplates, welding fixtures, ICT in-circuit test pin beds and automation assembly locating parts, bakelite sheet provides both electrical isolation and stable structural support. Dongguan Chaorong Electronics Co., Ltd. supplies paper-based (PFCP) and fabric-based (PFCC) grades from 1 mm to 100 mm thick, with CNC precision machining, slotting, drilling and counterboring services to meet automation lines' dual demands for fixture accuracy and delivery time.
Core Technical Features
1. Excellent Electrical Insulation
Bakelite sheet achieves perpendicular-to-laminate breakdown voltage ≥10 kV/mm (tested to IEC 60893) with volume resistivity ≥10¹⁰ Ω·cm, providing stable dielectric strength at room temperature. This makes it ideal for insulating components of live-work fixtures and for the isolation layer between signal pins and metal baseplates in test fixtures, effectively preventing short circuits and signal crosstalk.
2. Outstanding Machinability
Compared with metals and advanced composites, bakelite has moderate hardness (Rockwell M scale ~100–120), does not gum up cutters and shows little tendency to burr. It can be milled, drilled and tapped at high speed with standard carbide tooling — machining efficiency is higher than FR4 or carbon fiber with low tool wear, making it the most cost-effective choice for volume fixture production.
3. Good Heat Resistance and Dimensional Stability
Bakelite operates continuously up to 130 °C (short-term to 150 °C) and performs reliably in solder reflow and wave-soldering fixture applications. Water absorption ≤1.0% means minimal dimensional change in normal workshop environments, safeguarding repeatable fixture positioning accuracy.
4. Creep and Wear Resistance
As a thermoset, bakelite exhibits virtually no creep under sustained clamping loads — long-term clamping without deformation. Its surface, after finishing, offers moderate friction: protecting workpiece appearance while ensuring reliable locating.
Typical Applications
| Application | Grade | Thickness | Key Requirements |
|---|---|---|---|
| CNC fixture baseplate | Paper PFCP | 10–30 mm | Flat, insulating, easy to machine |
| Welding / soldering pallets | Fabric PFCC | 3–10 mm | Heat resistant, no deformation |
| ICT test pin bed | Paper PFCP | 6–16 mm | High insulation, precise holes |
| Assembly locating blocks | Paper PFCP | 5–20 mm | Wear resistant, dimensionally stable |
CNC Machine Fixtures
In volume CNC machining, bakelite serves as vacuum-chuck baseplates or form-locating fixtures. Its insulation and machining convenience allow multi-station slots to be laid out rapidly on a single baseplate with locating accuracy ≤±0.05 mm, significantly improving clamping efficiency.
Welding and Solder Pallets
The fabric grade offers superior heat resistance and is the standard choice for wave-soldering and reflow pallets: at 260 °C peak temperatures it does not char short-term and releases no harmful gases, protecting both solder quality and operator safety.
Selection Guide and Machining Recommendations
Defining Key Parameters
- Choose the grade: paper-based PFCP for general insulation and structural parts; fabric-based PFCC where higher temperature resistance and toughness are needed.
- Define thickness: load-bearing baseplates should be ≥10 mm; Chaorong holds machining flatness within ≤0.2 mm/300 mm.
- Confirm compliance: for export or electronics-industry use, specify RoHS and halogen-free requirements at ordering.
- Surface treatment: apply anti-static rubber sheeting or local epoxy edge-sealing to long-term friction areas.
CNC Machining Recommendations
- Use sharp carbide cutters at medium-high spindle speed with steady feed for a clean, glossy cut surface.
- Pre-drill pilot holes before tapping and apply light cutting fluid to avoid heat-induced wall scorching.
- For volume fixtures, do a first-article trial fit to confirm locating and insulation before mass production, reducing rework.
Why Choose Dongguan Chaorong Electronics
Dongguan Chaorong Electronics Co., Ltd. operates multiple high-speed CNC machines and precision inspection equipment, supplying bakelite fixture blanks and finished machined parts long-term to electronics manufacturing, automotive-parts and automation companies. We hold the line on material compliance, controllable lead times and 100% dimensional inspection — providing one-stop service from material selection advice to volume delivery, helping customers raise automation and assembly efficiency on their production lines.