TECNA TE4649N HVAC Rocker Arm Spot Welder – 25 kVA
HVAC / sheet-metal application?
We’ll help match power, reach, cooling and production rate to the right TECNA model.
TECNA TE4649N HVAC Rocker Arm Spot Welder – 25 kVA
Description
Description
HVAC Quick Fit — TECNA TE4649N
The TE4649N is where the HVAC lineup moves from portable guns into a true stationary production welder. Its 25 kVA pneumatic rocker-arm design, adjustable arms and deep throat make it a strong fit for established duct shops building larger fittings and assemblies day after day.
Good fit for
Large duct fittings, plenums, HVAC equipment housings, brackets, reinforcement tabs and repeat production assemblies.
Why choose it
More reach, force and duty than portable guns, plus water-cooled components and a two-stage foot-pedal workflow.
Move up when
You need the deepest reach, more electrode force or heavier production capability.
HVAC application note
For galvanized duct production, use the actual material, coating and gauge to establish weld schedules. Spot welding is best for discrete overlap joints and attachments rather than continuous leak-tight seams.
TECNA manufacturer technical reference ↗
| TECNA TE4649N Rocker Arm Spot Welder Specifications | |
|---|---|
| Model | TECNA TE4649N |
| Operation | Pneumatic |
| Welder Type | Rocker Arm Spot Welder |
| Nominal Power (50% Duty Cycle) | 25 kVA |
| Maximum Power | 55 kVA |
| Secondary Voltage | 4.6 V |
| Maximum Short Circuit Current | 14,500 A |
| Maximum Welding Current (Steel) | 11.6 kA (11,600 A) |
| Thermal Current @ 100% | 3.8 kA |
| Power Supply | Dual Voltage 220 / 440V, 60 Hz |
| Delayed Fuse (220V) | 100 A |
| Delayed Fuse (440V) | 50 A |
| Primary Cable (up to 30 m) | 16 mm² |
| Insulation Class | Class F |
| Compressed Air Requirement | 94 - 145 psi (6.5 - 10 bar) |
| Air Consumption | 152 SCF per 1,000 welds |
| Minimum Arm Length | 15.0 in. (380 mm) |
| Maximum Arm Length | 27.6 in. (700 mm) |
| Electrode Force (Min. Arms) | 363 lb (165 daN) |
| Electrode Force (Max. Arms) | 198 lb (90 daN) |
| Working Stroke | 0.4 - 4.1 in. (10 - 105 mm) |
| Short Circuit Current (Max. Arm Length) | 10.5 kA |
| Water Cooling Requirement | 1.0 GPM (3.8 L/min) |
| Minimum Water Pressure | 36 psi (2.5 bar) |
| Noise Level | 70+ dB(A) |
| Net Weight | 321 lb (146 kg) |
| Arm Diameter | 1.58 in. (40 mm) |
| Electrode Holder Diameter | 0.88 in. (22 mm) |
| Electrode Taper | 4RW / 1MT |
HVAC / duct fabrication focus
Where this TECNA model fits in an HVAC shop
Stationary duct-shop production
Large fittings, plenums, housings, brackets and repeated assemblies. Resistance spot welding is strongest where overlapping sheet can be clamped from both sides and the joint only needs discrete welds rather than a continuous airtight seam.
TECNA HVAC model ladder
Choose by shop size and production style
TE7902
Small shops, intermittent fittings and simple portable use. No air or water required.
View model → Portable • 6 kVATE7903
Higher-rate hand welding with water cooling; no compressed air required.
View model → Suspended • 6 kVATE7913
Pneumatic, water-cooled and balanced for repetitive multi-angle production.
View model → Pedestal • 6 kVATE7915
Dedicated fixed station for recurring fittings and light production work.
View model → Stationary • 25 kVATE4649N
Established duct shops needing deeper reach, more force and production duty.
View model → Production • 50 kVATE4663NX
Highest-capacity option here for large parts, deep access and demanding output.
View model →HVAC Spot Welder Fit Check
Send the duct-shop application. We’ll narrow the machine.
You do not need to know the TECNA model. Gauge, material, part type, access, weld rate and available shop services are more useful than guessing at kVA.
24–26 ga galvanized • spin-in collars + square-to-round fittings • 50–100 welds/day • portable preferred • 230 V available • no water loop.
