Small Portable Spot Welding Guns
TECNA offers top-of-the-line manual or pneumatic portable spot welding guns with integrated transformers and digital weld controls. T. J. Snow stocks TECNA's hand held spot welders, portable spot welders suspended by a spring balancer and pedestal-mounted spot welders.
TECNA Portable Spot Welding Guns are a great replacement for discontinued Miller Spot Welders.
TECNA's small, portable spot welding guns are available in 2-6 kVA.
Small Manual Portable Spot Welding Guns
Miller Electric has discontinued their line of spot welding guns. T. J. Snow has found TECNA® to be a great replacement. Please see chart at the bottom of the page for discontinued Miller Electric Weld Gun Comparisons.
TECNA Model #7900
- 2 kVA
- 220V / 60 Hz / Single Phase
- Air-Cooled
- Manual Operation
- 7,200 short circuit secondary amperes
- 269.8 lbf max electrode force (with 4.92″ arms)
- Other arm lengths and accessories available. (Contact us for more specific information.)
- Ideal for auto body repair, maintenance shops or other light industrial uses
- Compensation circuit starts the timer only when there is a proper passage of current, which enables to perform on oxidized sheets, on surfaces with paint residues or on black sheets
- Synchronous built-in electronic timer with SCR from 2 to 65 cycles
- Pulsation Feature and Kit Options are available
- Balancers are available for ease of handling. Contact a sales rep for assistance with sizing
TECNA Model #7902
- 2.5 kVA
- 220V / 60 Hz / Single Phase
- Air-Cooled
- Manual Operation
- 8,200 short circuit secondary amperes
- 269.8 lbf max electrode force (with 4.92″ arms)
- Other arm lengths and accessories available. (Contact us for more specific information.)
- Ideal for auto body repair, maintenance shops or other light industrial uses
- Compensation circuit starts the timer only when there is a proper passage of current, which enables to perform on oxidized sheets, on surfaces with paint residues or on black sheets
- Synchronous built-in electronic timer with SCR from 2 to 65 cycles
- Current control with phase shift adjustment to carry out difficult welds, on very thin thickness, on rods with reduced diameter, on stainless steel sheet and similar.
- Pulsation Feature and Kit Options are available
- Balancers are available for ease of handling. Contact a sales rep for assistance with sizing
TECNA Model #7903
- 6 kVA
- 220V / 60 Hz / Single Phase
- Water-Cooled
- Manual Operation
- 8,200 short circuit secondary amperes
- 269.8 lbf max electrode force (with 4.92″ arms)
- Other arm lengths and accessories available. (Contact us for more specific information.)
- Versatile portable spot welder for auto body repair shops and maintenance shops
- Compensation circuit starts the timer only when there is a proper passage of current, which enables to perform on oxidized sheets, on surfaces with paint residues or on black sheets
- Synchronous built-in electronic timer with SCR from 2 to 65 cycles
- Current control with phase shift adjustment to carry out difficult welds, on very thin thickness, on rods with reduced diameter, on stainless steel sheet and similar.
- Pulsation Feature and Kit Options are available
- Balancers are available for ease of handling. Contact a sales rep for assistance with sizing
Small Pneumatic Portable Spot Welding Guns
TECNA Model #7911
- 2.5 kVA
- 220V / 60 Hz / Single Phase
- Air-Cooled
- Pneumatic Operation
- 281 lbf max electrode force (with 4.92″ arms)
- Other arm lengths and accessories available. (Contact us for more specific information.)
- Light and proved spot gun for car body repair and maintenance / preassembly works in industry
- Compensation circuit starts the timer only when there is a proper passage of current, which enables to perform on oxidized sheets, on surfaces with paint residues or on black sheets
- Synchronous built-in electronic timer with SCR from 2 to 65 cycles
- Additional arm couplings to provide larger opening between arms
- A built-in differential pressure switch operates the timer when the electrode force is correct
- Pulsation Feature and Kit Options are available
- Balancers are available for ease of handling. Contact a sales rep for assistance with sizing
TECNA Model #7913
- 6 kVA
- 220V / 60 Hz / Single Phase
- Water-Cooled
- Pneumatic Operation
- 269.8 lbf max electrode force (with 5.91″ arms)
- Other arm lengths and accessories available. (Contact us for more specific information.)
- Light and proved spot gun for car body repair and maintenance / preassembly works in industry
- Compensation circuit starts the timer only when there is a proper passage of current, which enables to perform on oxidized sheets, on surfaces with paint residues or on black sheets
- Current control with phase-shift adjustment to carry out difficult welds, on very think thickness, on rods with reduced diameter, on stainless steel sheets and similar
- Synchronous built-in electronic timer with SCR from 2 to 65 cycles
- Additional arm couplings to provide larger opening between arms
- A built-in differential pressure switch operates the timer when the electrode force is correct
- Pulsation Feature and Kit Options are available
- Balancers are available for ease of handling. Contact a sales rep for assistance with sizing
TECNA Model #7915
- 6 kVA
- 220V / 60 Hz / Single Phase
- Water-Cooled
- Pneumatic Operation
- 269.8 lbf max electrode force (with 5.9″ arms)
- 8,200 short circuit secondary amperes
- Other arm lengths and accessories available. (Contact us for more specific information.)
- Versatile portable spot welder for auto body repair shops and maintenance shops
- Compensation circuit starts the timer only when there is a proper passage of current, which enables to perform on oxidized sheets, on surfaces with paint residues or on black sheets
- Current control with phase-shift adjustment to carry out difficult welds, on very think thickness, on rods with reduced diameter, on stainless steel sheets and similar
- Synchronous built-in electronic timer with SCR from 2 to 65 cycles
- Additional arm couplings to provide larger opening between arms
- A built-in differential pressure switch operates the timer when the electrode force is correct
- Pulsation Feature and Kit Options are available
- Balancers are available for ease of handling. Contact a sales rep for assistance with sizing
| ITEM | 7900 | 7902 | 7903 | 7911 | 7913 | 7915 | |
|---|---|---|---|---|---|---|---|
| Cooling | Air | Air | Water | Air | Water | Water | |
| Operation | Manual | Manual | Manual | Pneumatic | Pneumatic | Pneumatic | |
| Supply voltage 60Hz * | V | 220 V | |||||
| Rated @ 50% duty cycle | kVA | 2 | 2.5 | 6 | 2.5 | 6 | 6 |
| Maximum welding power | kVA | 13 | 16 | 16 | 16 | 16 | 16 |
| Short circuit current | kA | 7.2 | 8.2 | 8.2 | 8.2 | 8.2 | 8.2 |
| with arms L= | in (mm) | 4.92 (125) | 4.92 (125) | 4.92 (125) | 4.92 (125) | 5.9 (150) | 5.9 (150) |
| Thermal current 100% | A | 610 | 700 | 1700 | 700 | 1700 | 1700 |
| No load secondary voltage | V | 2.3 | 2.5 | 2.5 | 2.5 | 2.5 | >2.5 |
| Insulation class | F | F | F | F | F | F | |
| Service @ 220v | Amps | 16 | 16 | 16 | 16 | 16 | 16 |
| Standard arms throat depth L | in (mm) | 4.92 (125) | 4.92 (125) | – | 4.92 (125) | 4.92 (125) | – |
| Max. electrode force | lbf | 269.8 | 269.8 | 269.8 | 281 | 269.8 ( | 269.8 |
| with arms L= | in (mm) | 4.92 (125) | 4.92 (125) | 4.92 (125) | 4.92 (125) | 5.9 (150) | 5.9 (150) |
| Arms gap | in (mm) | 3.78 (96) | 3.7 (94) | 3.7 (94) | 3.78 (96) | 3.7 (94) | 3.7 (94) |
| Max. electrodes stroke | in (mm) | 2.17 (55) | 2.17 (55) | 2.75 (70) | 2.17 (55) | 2.17 (55) | 2.75 (70) |
| with arms L= | in (mm) | 4.92 (125) | 4.92 (125) | 5.9 (150) | 4.92 (125) | 155 | 5.9 (150) |
| Water cooling required | l/min | 2.5 | 3.7 | 3.7 | 2.5 | 3.7 | 3.7 |
| Water max. pressure | psi | – | – | 2.5 | – | – | 36 |
| Noise produced | dB(A) | < 70 | < 70 | < 70 | 62 | 63 | 64 |
| Level of vibrations | m/s2 | < 2.5 | < 2.5 | < 2.5 | < 2.5 | < 2.5 | < 2.5 |
| Welding parameters | |||||||
| welding time | cycles | 14 | 14 | 20 | 4 | 6 | 6 |
| welding current | kA | 5 | 5 | 6 | 4.1 | 6.1 | 6.1 |
| working rating in welds/min | 2 | 2 | 6 | 11 | 15 | 15 | |
| Mains cable length | ft (m) | 12.47 (3.8) | 12.47 (3.8) | 12.47 (3.8) | 12.47 (3.8) | 12.47 (3.8) | 12.47 (3.8) |
| Net weight with arms 125 mm | lbs (kg) | 23.1 (10.5) | 24.25 (11) | – | 23.1 (10.5) | 24.25 (11) | – |
| Net weight with arms 150 mm | lbs (kg) | – | – | 26.5 (12) | – | – | 26.5 (12) |
| Net weight with arms 500 mm | lbs (kg) | 28.7 (13) | 29.8 (13.5) | 30 (13.6) | 28.7 (13) | 29.8 (13.5) | 30 (13.6) |
Miller Electric Spot Welding Gun Equivalents
Miller Electric no longer produces their line of portable spot welder guns. The experts at T. J. Snow Company have found TECNA® small portable spot weld guns to be a high quality, easy to use, reliable replacement moving forward. See the comparison chart below and contact us with any questions.
| Miller Spot Weld Gun Model Number | Supply Voltage | Output @ 50% Duty Cycle | Cooling | MFR # | TECNA Model Equivalent |
|---|---|---|---|---|---|
| MSW-41 | 110 | 1.5 | Air | 900371 | 7900 |
| MSW-41T | 110 | 1.5 | Air | 901345 | 7900 |
| LMSW-52 | 220 | 2.5 | Air | 900377 | 7902, 7911 |
| LMSW-52T | 220 | 2.5 | Air | 901357 | 7902, 7911 |
For more information about spot welding portable guns or help sizing a gun to your application, please contact T. J. Snow for assistance. More TECNA Products available, please browse our selection:
TECNA MF Inverter Spot Welding Gun
