Copper Studs for Transformers
Copper Threaded Studs -Precision Copper Components for LV, MV & HV transformer bushing applications
We are one of the leading manufacturers and exporters of Copper Studs for Transformers from India. We have been supplying high-conductivity threaded Copper studs to the global transformer and electrical equipment market for many decades. Our Copper studs are engineered for low voltage (LV), medium voltage (MV), and high voltage (HV) applications, especially for transformer bushing assemblies and terminal connections. With world-class machining facilities and a legacy of precision, we provide full-threaded and half-threaded Copper studs that conform to ASTM, DIN, IS, and BS standards. Our flexibility in production, competitive lead times, and strong engineering support make us a preferred partner for OEMs and electrical utilities worldwide. We have been manufacturing and supplying Copper full threaded transformer studs, Solid Copper Studs for transformer busings since 3 decades.We use High Conductivity Copper material for manufacturing Copper studs.
Material Grades & Properties of Copper Studs
We manufacture Copper studs using high-purity Copper grades that ensure superior electrical conductivity and mechanical strength.
| Material Grade | Standard | Copper Content | Electrical Conductivity |
|---|---|---|---|
| ETP Grade Copper | ASTM B187 / B133 | > 99.90% Cu | ≥ 100% IACS |
| Oxygen-Free Copper (OFHC) | ASTM B187 / B170 | ≥ 99.95% Cu | ≥ 101% IACS |
| Electrolytic Copper Rod | IS 191 / DIN 40500 | ≥ 99.90% Cu | ≥ 100% IACS |
Manufacturing Processnof Copper Studs Threaded studs for Transformer Bushings
Our Copper transformer studs are manufactured through high-precision processes to meet dimensional accuracy and performance requirements:
- Copper Rod Sourcing & Cutting – High-purity Copper rods are sourced and cut to required lengths.
- Turning & Threading – CNC lathes and precision thread rolling machines produce accurate full or half threads.
- Chamfering & Slotting – For ease of assembly and electrical contact.
- Annealing (Optional) – For improved ductility in certain applications.
- Deburring & Surface Cleaning – Ensures smooth finish and better conductivity.
- Electroplating (Optional) – Tin or Silver plating as per customer requirement.
Machinery Used:
- CNC Turning Centers
- Thread Rolling Machines
- Centerless Grinders
- Chamfering & Slotting Machines
- Plating & Cleaning Equipment
Typical Products
- Full Threaded Copper Studs
- Half Threaded Copper Studs
- Threaded Copper Studs with Hex Shoulder
- Copper Studs with Slotted or Drilled Ends
- Tin-Plated or Silver-Plated Studs
Note: These studs also come primarily in 3/8″, 1/2″, and 3/4″ UNC threads, which are widely used in transformer bushing assemblies for LV, MV, and HV systems.
Finish Options
- Natural Bright Copper Finish
- Tin Plated (Electro-Tinned)
- Silver Plated for High Conductivity
Industries Served ✔ Transformer Manufacturing (Power & Distribution Transformers)
✔ Electrical Utilities and Switchgear
✔ Renewable Energy Equipment (Solar Inverters, Wind Converters)
✔ Railways and Traction Systems
✔ Heavy Electrical Equipment Manufacturers
Tolerances & Turnaround Time
- Dimensional Tolerances: ±0.05 mm (or as per customer drawing)
- Thread Tolerances: As per ISO metric / UNC / UNF / BSW / DIN standards
- Typical Turnaround Time: 4–6 weeks for bulk orders
Performance Metrics
- High Conductivity: ≥100% IACS for maximum current transfer
- Thermal Resistance: Excellent heat dissipation properties
- Mechanical Strength: Withstands tightening torque during installation
- Surface Integrity: Burr-free threads for superior electrical contact
Size-Dimensional Chart For Copper Studs
| Thread Size | Length Range (mm) | Thread Type | Type |
| M6 | 20–100 | ISO Metric | Full / Half Threaded |
| M8 | 25–150 | ISO Metric | Full / Half Threaded |
| M10 | 30–200 | Metric / UNC | With or without Slot |
| M12 | 40–250 | Metric / BSW | Tin Plated / Bare |
| M16 | 50–300 | Metric / UNF | Hex Shoulder Optional |
| 3/8″ | 1″–6″ | UNC | Threaded / Slotted |
| 1/2″ | 1.5″–6″ | UNC | Tin / Silver Plated |
| 3/4″ | 2″–8″ | UNC | Heavy Duty Studs |
Custom sizes available upon request.
Size-Dimensional Chart for Accessories
Component Type | Outer Diameter (mm) | Thread Size (Metric) | Thread Size (UNC) | Length (mm) |
|---|---|---|---|---|
Copper Stud | 6.0 | M6, M8, M10 | 1/4″, 3/8″ | 15-50 |
Bronze Spade | 8.0 | M8, M10, M12 | 1/2″ | 20-60 |
Bronze Terminal | 10.0 | M10, M12, M14 | 3/4″ | 25-75 |
Brass Lock Nut | 12.0 | M8, M10, M12 | 1/4″, 3/8″, 1/2″, 3/4″ | – |
✔ Fully Customizable Dimensions & Plating
✔ 4–6 Week Standard Delivery
✔ Quick Sampling & Prototyping
✔ Responsive Communication & Engineering Support
✔ Private Labeling & Custom Packaging Available
Customer Testimonial David M., Ohio, USA: “We’ve been working with this Indian supplier for over 7 years. Their Copper transformer studs have consistently outperformed our previous vendors in quality and lead times. Communication is clear, and customization is never a problem.”
Packaging & Shipping
- Standard Packaging: Corrugated boxes, polybags with labels
- Custom Packaging: Blister packs, customer-branded cartons
- Export Shipping: Sea Freight, Air Freight, and Express Courier options
Glossary of Terms
- IACS: International Annealed Copper Standard, a measure of electrical conductivity
- ETP Copper: Electrolytic Tough Pitch Copper, high conductivity grade
- OFHC Copper: Oxygen-Free High Conductivity Copper for premium electrical performance
- Thread Rolling: A process to form threads by pressing rather than cutting, resulting in higher strength
Looking for high-performance Copper Studs for Transformers? Contact us now for a quick quote, product brochure, or engineering consultation. Reach out via email, WhatsApp, or phone – we respond promptly!
