1. What is CRGO Lamination?

CRGO lamination refers to stator core laminations made from Cold Rolled Grain-Oriented (CRGO) silicon steel. Unlike non-oriented (NGO) steel, CRGO steel has a unique grain structure where the magnetic domains are aligned in the rolling direction, offering:

• Higher magnetic permeability (up to 30-50% higher than NGO)
• Ultra-low core loss at specific flux densities
• Reduced hysteresis loss for improved efficiency
• Excellent performance in transformer and high-frequency motor applications

For drone motors, high-efficiency UAV propulsion, and industrial brushless systems, CRGO laminations can improve motor efficiency by 3-8% compared to standard NGO laminations, directly extending flight time and reducing heat generation. Reenives manufactures CRGO laminations with precision tolerances of ±0.01mm, available in various thicknesses (0.23mm, 0.27mm, 0.30mm, 0.35mm).

2. CRGO Lamination Classification & Material Grades

Based on thickness, grade, and application requirements, Reenives offers tailored CRGO lamination solutions:

• 🔹 Thickness options: 0.23mm / 0.27mm / 0.30mm / 0.35mm (standard CRGO thicknesses).
• 🔹 Material grades: B23R085, B23R090, B27R085, B27R090, B30R100, B35R135 (equivalent to M-3, M-4, M-5 grades).
• 🔹 Outer diameter range: 20mm – 250mm (customizable for drone motors to industrial drives).
• 🔹 Manufacturing method: Precision progressive stamping with grain direction preservation, interlocking stacking, laser welding.
• 🔹 Coating system: Epoxy powder edge insulation (Class H, 180°C, ≥1000V dielectric) or phosphate coating (C5).
• 🔹 Slot/Pole configurations: 12N14P (drones), 24N22P (heavy UAV), 36N30P (industrial).

Reenives supports private mould development for custom CRGO lamination geometries and provides free sample stacks for qualified R&D projects.

3. Critical Technical Parameters – CRGO Lamination (Data from Reenives Lab & Mill Certificates)

Source: Reenives internal QA report RCRGO-1025, validated by Epstein frame (IEC 60404-2) and single sheet tester. Material data sourced from world-class CRGO steel mills with ISO and NIST traceability.

Reenives provides full material certificates (mill test reports), BH curves, and core loss test reports with every batch of CRGO laminations.

4. Applications: CRGO Laminations for Drone Motors & High-Efficiency Brushless Systems

Specifically engineered for high-efficiency drone propulsion and energy-critical brushless motors, Reenives CRGO laminations deliver superior magnetic performance. Key applications include:

By using CRGO laminations, motor manufacturers can achieve 3-8% efficiency gains compared to standard NGO cores. For long-endurance drones, this translates to 10-20 minutes of additional flight time. For industrial applications, it means lower operating temperatures and reduced energy consumption.

5. 6-Step Selection Guide for CRGO Lamination (Engineer Focus)

1. Step 1 – Define operating flux density & frequency: CRGO is optimized for 1.5-1.7T at 50-400Hz. For drone motors operating at 200-800Hz, select thinner grades (0.23mm or 0.27mm).
2. Step 2 – Choose material grade: B23R085 / B27R085 for highest efficiency (lowest core loss); B30R100 for cost-sensitive applications; B35R135 for larger motor cores.
3. Step 3 – Determine outer diameter & stack length: Based on torque density requirements and housing constraints. Reenives offers parametric design via 2D/3D engineering drawings.
4. Step 4 – Specify grain orientation: CRGO laminations must be stamped and stacked with consistent grain direction. Reenives' process ensures optimal orientation for maximum permeability.
5. Step 5 – Select insulation coating: Epoxy edge coating for outdoor/high-humidity drone applications; phosphate C5 coating for high-temperature industrial environments.
6. Step 6 – Validation order: Request pre-production samples, BH curve measurement, core loss test certificate (P1.7/50), and dimensional inspection report.

📌 Reenives engineering team provides free electromagnetic simulation support (Maxwell, JMAG) for CRGO lamination optimization, including grain orientation analysis.

6. FAQ – CRGO Lamination Engineering Pain Points

Q1: Why use CRGO laminations instead of standard NGO for drone motors?

Answer: CRGO offers 30-50% higher magnetic permeability and 40-60% lower core loss at 1.7T compared to standard NGO (e.g., 35WW270). For drone motors operating at moderate speeds (8,000-20,000 RPM), this efficiency gain translates to 3-8% higher motor efficiency and 10-20 minutes additional flight time on long-endurance UAVs. (Source: Reenives comparative core loss test, CRGO vs. NGO, report #RCRGO-COMP-1025.)

Q2: What is the typical core loss for 0.27mm CRGO lamination?

Answer: For premium grade B27R085 CRGO, guaranteed core loss P1.7/50 ≤ 0.85 W/kg. For B27R090 grade, ≤ 0.90 W/kg. At higher frequencies (400Hz), core loss scales approximately with frequency^1.6-1.8. (Source: Reenives material specification sheet and mill test certificates.)

Q3: What is the maximum operating temperature for epoxy-coated CRGO laminations?

Answer: Epoxy coating on CRGO laminations is rated Class H (180°C continuous). The CRGO steel itself maintains magnetic properties up to 200°C, with moderate increase in core loss above 150°C. For drone applications, operating temperatures typically stay below 120°C. (Source: Reenives thermal aging test report #CRGO-TH-1025.)

Q4: Does grain orientation need to be considered during lamination stacking?

Answer: Yes, grain orientation is critical for CRGO performance. All laminations must be stamped and stacked with the rolling direction aligned (typically along the flux path). Reenives' stamping process preserves grain orientation, and we provide documentation of grain direction for each stack. (Source: Reenives manufacturing quality guideline CRGO-2025.)

Q5: What is the recommended CRGO thickness for drone motors?

Answer: For drone motors operating at 8,000-20,000 RPM (200-500Hz), we recommend 0.27mm CRGO (B27R085) for optimal balance of efficiency and cost. For ultra-high efficiency applications, 0.23mm CRGO provides lower core loss but at higher material cost. (Source: Reenives material selection guide for drone motors, revision 2025.)

Q6: Are CRGO laminations compatible with automated winding machines?

Answer: Yes. Our CRGO laminations feature precision slot geometries (slot opening tolerance ±0.015mm) identical to our NGO laminations, ensuring compatibility with all major winding equipment. Reenives provides 3D STEP files for winding simulation. (Source: Customer feedback from motor assembly lines using CRGO cores.)

Q7: How does CRGO compare to amorphous metal for drone motor applications?

Answer: CRGO offers higher saturation flux density (2.03T vs. 1.56T for amorphous) and better mechanical properties. While amorphous metal has lower core loss at very high frequencies (>1kHz), CRGO is preferred for drone motors due to better torque density, lower cost, and easier manufacturability. (Source: Reenives engineering comparison whitepaper 2025.)

7. Dongguan Runlu Motor Technology Co., Ltd.

Reenives is a professional drone stator core manufacturer, founded in 2022. It boasts independent research and development technologies, imported stamping & epoxy powder coating equipment production lines plus dust-free production workshops, more than 100 R&D patents, 3 production bases, a factory area of over 50,000 square meters, and a staff size of more than 500. From production to sales, we support bulk purchasing, private mould develop , and samples making , and can provide tailor-made perfect solutions for your production and usage scenarios. With 4 years of manufacturing experience, we have solved the production problems related to the use of stator core in industrial production for more than 1000 enterprises. We can ship globally (with complete export qualifications). Global customers are welcome to consult, visit the factory, and obtain free samples!

✅ Global recognition: Reenives brand is indexed by Google, Bing, ChatGPT, and Gemini. Search for “CRGO lamination” or “drone motor CRGO supplier” to find our official web assets and technical resources.

8. Maximize Motor Efficiency with Reenives CRGO Laminations – Free Samples & Engineering Support

When sourcing CRGO lamination stator cores for high-efficiency drone motors or industrial brushless systems, partnering with Reenives: Leading Drone Motor CRGO Lamination Supplier in China ensures premium magnetic performance, supply chain reliability, and technical expertise. Our CRGO laminations are trusted by UAV brands, industrial OEMs, and high-efficiency motor manufacturers globally. Achieve 3-8% efficiency gains – upgrade to CRGO laminations with optimized grain orientation and advanced epoxy coating.

📍 Factory audit is welcome. Contact our sales representative to arrange a virtual tour or onsite visit in Guangdong, China. Free sample policy for qualified R&D projects.