High Precision Insulation & Structural Components Manufacturer
Professional CNC machining service for phenolic resin,
bakelite and industrial insulation materials.
Upload your drawing and get a fast quotation within 12–24 hours.
Materials: Phenolic / Bakelite / G10 / FR4
Tolerance: ±0.1mm (up to ±0.02mm)
Prototype: 5–7 days
Specifically, our factory delivers professional CNC machining service for phenolic resin, bakelite, and other industrial insulation materials.
We provide professional CNC machining services for phenolic resin materials, including phenolic paper laminate, phenolic cotton laminate and bakelite sheets & rods.
Our phenolic machined components are widely used in electrical insulation systems, high-temperature structures, industrial fixtures and wear-resistant applications.
With advanced CNC milling and turning machines, we are able to produce both prototype and mass production parts with stable quality and tight tolerances.
Typical parts include:
Electrical insulation blocks
Transformer insulation components
High-temperature support structures
Industrial jigs and fixtures
Wear-resistant guide parts
Rail transit insulation components
Phenolic resin parts perform well under high temperature and high voltage. Therefore, they are trusted in electrical systems, insulation panels, and energy applications.
Our CNC machines provide ±0.1 mm tolerance for all custom shapes. In addition, we offer edge chamfering and diameter customization to match engineering drawings.
The material is UL94 V-0 certified. Consequently, it ensures safety in demanding aerospace and railway environments where fire resistance is critical.
Prototyping is completed within 5–7 days. Furthermore, mass production orders are processed quickly to keep your project on schedule.
We support small orders and one-off parts for testing. At the same time, large OEM batches are welcomed. Our team works closely with clients to provide tailored solutions.
High precision CNC milling & turning
Tight tolerance machining: ±0.1mm / ±0.05mm / ±0.02mm optional
Excellent electrical insulation & heat resistance
Stable batch consistency for mass production
Prototype and small batch supported
Export-ready industrial packaging
We help engineers and procurement teams reduce development risk, control cost and shorten project lead time.
Traditionally, machining these dense composites required complex setups to prevent surface chipping. However, our elite engineering department utilizes state-of-the-art milling machines.
Describe the various products or categories, such as:
Are you ready to launch your customized industrial manufacturing project with our factory?
Specifically, we make the entire sourcing process smooth, transparent, and completely worry-free for global B2B wholesale buyers. Here is our step-by-step custom guide:
Step 1: Send Us Your Drawing Files First, you can send us your official engineering design drawing files. We fully support standard industry formats including STEP, PDF, and DWG. Consequently, our tech department can review your layout files immediately.
Step 2: Confirm Project Technical Specs Secondly, we will work closely together to confirm your required raw material, total batch quantity, and size tolerance needs. Traditionally, communicating these technical specs could take days. However, our responsive group aligns all parameters quickly.
Step 3: Engineering Review & DFM Feedback Thirdly, our expert department conducts a deep engineering review. We provide professional Design for Manufacturability (DFM) feedback. Therefore, we help you optimize part structures and reduce total production costs before we start tooling.
Step 4: Direct Factory Quote Within 12-24 Hours Indeed, high efficiency is our absolute business promise. Furthermore, we calculate costs rapidly and deliver a complete factory wholesale quotation within twelve to twenty-four hours. In addition, our pricing sheets are clear and completely transparent.
Step 5: Rapid Prototype Production Subsequently, we move directly into the fast prototype production phase. Our precision CNC department completes your sample test pieces within five to seven working days. Therefore, you can verify the fit and physical material quality with zero risk.
Step 6: Mass Production & Final Inspection Next, upon your sample approval, we launch full-scale mass production. We run strict quality inspections to verify every dimension. In conclusion, we ensure that our size tolerance is strictly limited to your strict engineering drawing limits.
Step 7: Export Packaging & Global Delivery Finally, we utilize heavy-duty export packaging to safeguard all custom components. We provide reliable global shipping and safe delivery straight to your port. Please contact our helpful support team today to start your free project quote! Thank you!
We supply custom CNC phenolic resin parts for energy, aircraft, rail, and industry projects. As a result, you benefit from stable quality, long service life, and fast support. In addition, small orders and OEM drawings are welcome.
Set working temperature, electrical strength, or arc resistance based on your case. For example, parts are used in switchgear, the aircraft industry, and rail systems. Therefore, you can match safety rules more easily.
Choose plates, tubes, or sleeves. Bushings and blocks are also available. In addition, you can set OD, ID, length, and wall size to match the design. As a result, parts will fit smoothly into your project.
We offer drilling, slot cutting, and routing. Moreover, full 3D CNC milling is ready for complex shapes. Consequently, you gain both accuracy and speed in production.
Options include paper-based, fabric-based, or glass-filled resin. Therefore, you can balance protection and strength for each job. In fact, this choice makes it easy to adapt to cost and safety needs.
Each part is cut from layered resin stock. As a result, machining provides steady quality and tight accuracy. On the other hand, fast steps reduce both cost and time.
Edges can be beveled or polished. Additionally, anti-moisture coating or sanding is optional. Thus, you can improve both look and life span.
Add fixing holes, grooves, or notches as needed. Also, labels and batch marks can be included. In conclusion, you get parts that match your needs better.
Every batch is checked for accuracy, flatness, and edge finish. Consequently, inspection reports are available when needed. Overall, this ensures trust and stable supply for your business.
CMM dimensional inspection
Full dimensional inspection report available
Material certificate available
FAI report for first article (optional)
Batch traceability system
We follow strict quality control procedures to ensure stable and repeatable production quality.
Get a quote in 24 hours.
Prototypes ready in 7 days.
Fast machining and quick delivery mean faster progress for your projects.
We focus on speed, accuracy, and strong quality for phenolic insulation parts.
Phenolic fabric tubes, also called bakelite tubes or fabric-reinforced bushings, are made by hot-rolling cotton fabric that is coated with phenolic resin. As a result, these parts provide excellent insulation, good wear resistance, and strong mechanical performance. In addition, they are widely used for custom-made items such as bushings, washers, and structural insulators.
Key features:
✅ Compatible with CNC machining, carving, and trimming
✅ Customizable diameters available through mold development
✅ Reliable performance in humid and oil-filled environments
✅ Flame-retardant and long-lasting for industrial applications
3240 Epoxy Resin Boards and Parts are made from fiberglass cloth impregnated with epoxy resin, then hot-pressed and cured. They offer excellent mechanical strength, dielectric performance, and heat resistance. Ideal for electrical insulation parts, especially in humid environments or transformer oil.
Highlights：
✅ Made from alkali-free fiberglass cloth impregnated with epoxy resin
✅ Excellent mechanical strength and dielectric performance
✅ Smooth surface with no bubbles, oil stains, or impurities
✅ Stable under high temperatures and transformer oil environments
✅ Available in a wide range of thicknesses and board sizes
✅ Supports CNC machining, drilling, trimming, and engraving
✅ Easy installation and long service life
Technical Properties:
Highlights：
✅ G10 / FR4 epoxy grade
✅ CNC machined into bolts, nuts, and fasteners
✅ Flame-retardant, acid- and oil-resistant
✅ Stable dielectric performance
✅ Smooth surface without air bubbles or contaminants
✅ Customizable diameters and lengths
✅ Long service life in harsh conditions
FR4 Epoxy Insulation Rods and Bolts are manufactured by pultruding fiberglass filaments impregnated with epoxy resin under high temperature and vacuum-controlled extrusion. These rods offer excellent dielectric properties, high mechanical strength, and smooth surfaces free from bubbles, oil, or impurities.
Available in multiple diameters (⌀6mm–⌀170mm), shapes (round, hex, square), and customizable lengths. Ideal for electrical insulation structures exposed to heat, humidity, and transformer oil.
Product Features：
Stable electrical insulation performance
Excellent flatness and smooth surface with no pits or dents
Flame-retardant, heat-resistant, and environmentally friendly
Sound-absorbing and thermal-insulating properties
Suitable for high-performance electrical and electronic insulation
Applications:
FR-4 fiberglass boards are widely used in:
FPC stiffeners and soldering-resistant carriers
PCB testing fixtures and precision gear plates
Electrical device insulation sheets and transformer parts
Motor insulation components and deflection coil terminal plates
Switch insulation boards and customized structural parts
Available Options:
Size: Customizable per request
Color: Standard water green
Thickness: Multiple options available
A fast, traceable workflow for CNC-machined insulation components.
Select high-quality phenolic sheets or laminated tubes according to application.
Raw boards or rods are cut into manageable blanks for further processing.
Ensure flatness or roundness before CNC machining for better accuracy.
Import CAD drawings and set machining parameters based on tolerances.
Use CNC routers or mills for drilling, slotting, contour shaping, and turning.
Edge polishing and chamfering to avoid sharp edges or fiber burrs.
Check critical dimensions using calipers or 3D probes; tolerance ±0.1mm.
Remove cutting dust and apply optional anti-humidity coating.
Parts are labeled, packed by batch, and dispatched within 7 days.
We are a reliable production factory from China.
Specifically, we specialize in top quality custom services for global brands.
Traditionally, buying parts from overseas custom shops can be a very long process.
However, our expert engineering group offers a fast and simple solution.
Therefore, international wholesale buyers love to work with us.
Consequently, you can get perfect shapes with direct factory support.
Q: What precision tolerance can your factory achieve for custom parts?
A: Specifically, our standard technical manufacturing delivers a general tolerance of ±0.1mm for most industrial shapes. Traditionally, reaching a higher accuracy level on dense composites was difficult for common workshops. However, our advanced engineering department can achieve a high precision tolerance up to ±0.02mm to match your exact engineering drawings perfectly.
Q: Do you support prototype development and small batch production?
A: Yes, we fully support both early-stage prototype creation and low-volume small batch orders. Consequently, global product developers can run small trials and single-piece testing without high financial risks. Therefore, you can source custom quantities from us with total peace of mind.
Q: Can you provide a professional inspection report before shipment?
A: Indeed, quality assurance is our absolute core focus. Furthermore, a full dimensional inspection report and an official raw material certificate are always available for every shipment. In addition, we check every single part carefully to ensure flawless surface quality before it leaves our facility.
Q: What is your typical manufacturing lead time for orders?
A: Generally, our custom prototype production jobs are successfully completed within 5 to 7 working days. For high-volume mass production, the standard timeline is usually two to three weeks depending on your final total quantity. In conclusion, we work hard to process every batch quickly to keep your commercial project strictly on schedule.
Q: Do you provide reliable international shipping and safe logistics?
A: Yes, we provide secure global shipping services to all major international ports and warehouses. We utilize heavy-duty export packaging to avoid any transit damages. Please feel free to contact our helpful support team today to get your free direct factory wholesale quote! Thank you!
Indeed, our strict size checking is our main business advantage.
Furthermore, we complete all prototype designs in five to seven working days.
In addition, we fully welcome small trials or large mass batches.
In conclusion, you can send your drawing file and get a quick price update within twelve hours. Please contact our helpful support team today! Thank you!
Consequently, we can produce custom phenolic resin parts with stable quality to fit your business needs perfectly. Therefore, we ensure clean cuts and stable dimensions for every custom order. In conclusion, upload your drawing and get a fast quotation within 12–24 hours!
