Why Custom Cooling Duct Spacers Matter in Modern Transformers
As transformer coil designs become more complex, custom oil duct spacers are essential. They help with thermal management and ensure winding stability. They’re engineered to:
- Fit precisely between windings
- Maintain uniform oil flow channels
- Reinforce mechanical integrity in high-voltage coils
These aren’t generic strips — they’re engineered solutions to match your electrical and thermal layout needs.
What Are Custom Oil Duct Spacers?
Custom oil duct spacers are transformer-specific insulation components used between winding layers to maintain spacing, promote oil circulation, and ensure dielectric separation.
- CNC or die-cut to precise winding geometries
- Maintain consistent cooling oil pathways
- Made from pressboard, pre-compressed board, or epoxy-laminated insulation
📌 These spacers are critical in both distribution and power transformer builds.
CNC Machining Capabilities for Transformer Spacers
We offer advanced CNC fabrication services tailored to transformer cooling system requirements. Supported features include:
- Slotting and perforations for oil venting
- Curved bending to follow winding contours
- Tapered or chamfered edges for seamless stacking
- Multi-hole blocks for structural integrity
✅ We accept DXF, DWG, and 3D PDF transformer insulation layout files — including full winding section breakdowns.
🔁 Reverse engineering from physical samples also available.
Available Materials & Specs
Choose the right material and geometry based on your voltage class, oil flow design, and mechanical constraints.
| Material Type | Properties & Use Case |
|---|---|
| Pressboard (IEC 60641) | High dielectric strength, oil compatibility |
| Pre-compressed board | Extra rigidity for HV and large transformers |
| Epoxy-laminated paper | High tensile + adhesive-ready bonding zones |
| FRP composite (optional) | For ultra-rigid or thermal-intense setups |
MOQ, Lead Time, and Sample Support
We streamline prototyping and production for OEMs and transformer builders:
- MOQ: Just 100 pcs per size — ideal for trials
- Lead Time: 5–12 days for CNC production
- Free Samples: Based on drawings or reverse samples
- Export-Ready: Wrapped for humidity protection with full batch traceability
How to Choose the Right Transformer Spacer Supplier
Use this checklist when selecting your transformer spacer supplier:
Can they interpret technical drawings and winding layouts accurately?
Do they offer certified materials (SGS/IEC 60641-compliant)?
Do they provide set packing by transformer model?
Can they handle global delivery — including FOB, CIF, or DDP terms?
👉 Tip: Avoid general-purpose traders who outsource cutting — they often lack insulation know-how and QA processes.
Why Partner With Us for CNC Transformer Spacers?
Trusted by over 30 transformer OEMs across Europe, MENA, and Southeast Asia
Reliable global shipping with customs-cleared delivery to 50+ countries
What sets us apart:
- 20+ years in transformer insulation machining
- In-house CNC and slotting operations with tight QA
- IEC-certified materials only (pressboard, pre-compressed board, epoxy)
- Full layout optimization support from our engineering team
- Export-ready service with multilingual support
Conclusion & Action Section
Custom CNC transformer spacers enhance cooling performance, improve mechanical strength, and ensure long-term electrical reliability.
Partnering with a technically aligned, certified supplier ensures your transformers operate efficiently and meet international standards.
📩 Ready to optimize your next transformer project?
🔘 [Request a Spacer Sample or Spec Sheet]
🔘 [Send Your Drawing for CNC Evaluation]
Phone: +86-15958243831
Email: jessie.feng@sidanm.com
Whatsapp: https://wa.me/8615958243831
