Original OTC DAIHEN CT-75 / CT-80 Plasma Cutting Torch (Dedicated for SUPER PLASMA C70)
CT-75 / CT-80 is a genuine Japanese-imported handheld plasma cutting torch custom-engineered by OTC DAIHEN for its classic SUPER PLASMA C70 (MRCT-70) inverter air plasma cutting machine. Supporting a robust 70A air-cooled output, this torch effortlessly achieves high-speed, precision cutting across medium-to-thick carbon steel, stainless steel, and aluminum plates. Its premier technological advantage lies in the advanced Non-HF (Non-High Frequency) contact arc ignition technology. At the moment of arc striking, the torch emits zero high-frequency or high-voltage electromagnetic radiation, completely eliminating fatal interference with precision CNC equipment, frequency converters, robotics, and industrial computers. Furthermore, its ergonomic curved gooseneck and integrated shield cup safety detection circuit provide operators with exceptional handling comfort and industrial-grade safety protection.
💡 Regional Model Note: CT-80 is typically the standard configuration model for the Greater China region, while CT-75 is frequently distributed in overseas global markets. Both torches share 100% identical core performance and interchangeable consumables (electrodes/nozzles).
✨ Core Technical Advantages of CT-75 / CT-80
⚡ Pure & Interference-Free: Non-HF Arc Ignition
Completely abandons traditional spark-gap high-frequency oscillation starting in favor of physical contact pullback arc ignition with zero electromagnetic radiation. This allows the cutting torch to operate safely inside sensitive CNC automated workshops, near medical instruments, and in confined spaces containing electronic control modules without causing system crashes or screen blackouts.
🎯 Superior Arc Compression & Slag Control
Benefiting from OTC DAIHEN’s micron-level precision nozzles and ceramic swirl ring design, shielding gas is transformed into a high-speed rotating, ultra-concentrated plasma arc column. Delivering extreme energy density and outstanding cut perpendicularity, it drastically minimizes bottom dross and heat-affected zones (HAZ), saving substantial post-cut grinding time.
🛡️ Industrial Safety Shield: Shield Cup Sensor
Integrated with a micro-switch safety circuit inside the torch body. Whenever operators replace electrodes or nozzles without securely tightening the outer ceramic retaining cup, the power source is mechanically interlocked to prevent high-voltage arc ignition, thoroughly eliminating fatal electrical shock hazards during routine consumable maintenance.
📋 Technical Specifications & Consumable Part Numbers
| Specification Attribute | Detailed Parameter / OEM Part Number |
|---|---|
| Torch Model / Body Model | CT-75 , CT-80 / PF0135 |
| Rated Cutting Current / Cooling Method | 70 A / Air-Cooled |
| Arc Ignition / Torch Profile | Non-HF Arc Ignition (Contact Type) / Handheld Curved Handle |
| Standard Cable Length / Compatible Machine | 6 m (Standard) / OTC SUPER PLASMA C70 (MRCT-70) |
| 🔹 Core Electrode Part Number | NPR0113 |
| 🔹 Core Cutting Nozzle Part Number | NPD0113-10 / NPD0113-12 |
| 🔹 Ceramic Swirl Ring Part Number | NPE0112 |
🛠️ Plasma Cutting Torch Maintenance & Troubleshooting Guide (Essential Reading)
- Devastating Impact of Moisture in Compressed Air: Plasma cutting relies heavily on dry compressed air. If air compressors lack refrigerated dryers or if oil-water separators fail, moisture-laden air blows directly into the high-temperature plasma arc. Moisture causes violent internal arc explosions (“sputtering”), carving a massive deep cavity into a brand-new electrode tip within minutes! Cut surfaces become rough and heavily dross-coated. Compressed air moisture is the number one cause of premature consumable failure.
- Electrode Wear Limit Evaluation: A hafnium (Hf) emitter core is embedded in the tip of NPR0113 electrodes. During normal arc ignition, a pit gradually forms. You must replace the electrode immediately once the pit depth exceeds 1.5mm! Never force cutting with an over-worn electrode; once the hafnium core is depleted, the arc will melt the copper electrode body, causing high-voltage electricity to destroy the torch head insulation.
- Fragile Ceramic Swirl Ring Warning: The NPE0112 swirl ring is responsible for generating high-speed tornado-like gas vortexes and is made from brittle precision ceramic. Never drop the torch onto steel plates or use the torch head to knock away scrap pieces, as impact causes microscopic cracks. Fractured swirl rings distort gas flow, causing severe arc deflection or short-circuit arcing between the electrode and nozzle.
- Shield Cup Interlock Alarm: If the power source shows no response upon pulling the trigger after replacing consumables and lights a fault LED, check whether the outer retaining ceramic cup is fully tightened. The internal safety micro-switch only permits high-voltage arc initiation when the shield cup is securely locked in place.
📞 Genuine OEM Parts · Global Shipping
Anhui Oujie Automation Technology Co., Ltd. is an authorized OTC DAIHEN distributor. We guarantee 100% brand-new, genuine OTC DAIHEN CT-75 / CT-80 torch assemblies and copper consumables, firmly rejecting inferior aftermarket parts prone to arc explosions!
✅ Fast global delivery with free expert technical guidance on compressed air moisture inspection and consumable lifespan evaluation.
