u-i4s-2139 | Pro Spot Refurbished i4s Spot Welder | Reconditioned
One pre-owned Pro Spot i4s smart inverter spot welder, reconditioned in our own shop. This is the machine that reads the panel for you — correcting weld energy thousands of times a second so boron and advanced high-strength steel comes out consistent without a technician chasing settings. Display on the gun, WiFi software updates and weld-log export, and the high-pressure gun standard on this model. Inspected, serviced and weld-tested by CRTE technicians with fresh consumables throughout, the full factory standard equipment set, and the optional C-to-X adapter included. 208–240V three-phase, confirmed on this machine's data plate — see the photos.
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Reconditioned Pre-Owned Pro Spot i4s Smart Spot Welder — i4s-2139
On a modern repair the panel decides the weld. Boron, martensitic, multi-layer advanced high-strength stacks — each one wants different energy, and guessing wrong is how a comeback starts. The i4s takes that judgement off the technician: adaptive auto-weld mode reads thickness, composition and resistance while the squeeze is happening and corrects weld energy thousands of times per second. What the shop gets is a repeatable weld from a tech who spent an hour learning the machine rather than a week.
This is Pro Spot's smart inverter resistance spot welder — the i4 platform with a processor and a network stack behind it. The gun carries its own display, so live feedback and parameter changes happen at the workpiece instead of back at the cart, and the high-pressure gun is standard equipment on this model. Arms stay water-cooled through a full 360 degrees of rotation and seat on a quick-connect docking system. Single-sided work runs off a library of 60-plus preset programs covering stitch welding, nail welding, carbon shrinking and dent pulling.
Being a connected machine matters more every year: WiFi software updates, onboard training and repair-procedure content, weld logs exported by email, and work orders assigned per technician — the documentation side that DRP and OEM-certified programs keep asking shops to produce. We don't distribute the i4s new. They reach us on trade, and serial i4s-2139 arrived on a dealership-group trade this summer. It did not go straight to the sales floor; it went across our service bench first, and it came off that bench inspected, serviced, weld-tested and carrying fresh consumables throughout. As a used purchase the i4s is a sensible machine to own — consumables are cheap and common, the arms hold their value, and the paperwork features are already built in.
What's Included with This Unit
This machine came in with its full factory standard set, inventoried item by item against Pro Spot's current component list and tested:
- High-pressure PS-700W spot gun, liquid cooled, with the display on the gun body
- Overhead boom and 8–10 kg tool balancer carrying the gun and cable weight
- Single-sided gun assembly that drives the preset program library
- Arms: 80 mm C-arm (PSW-080), 90 mm wheelhouse arm, plus 320 mm and 520 mm extension arms
- Electrode and cap kit — A-caps and F-caps, single-sided shank, carbon and stitch electrodes, weld caps and weld-on washers
- Consumable fastener packs: weld-on bolts, weld nuts, moulding-clip rivets, nails, and stud & washer adapters
- Spot hammer with weight, handle and electrode holder, trigger switch, welder cover, O-ring packs, wrenches and fittings
Key Features
- Adaptive auto-weld: weld energy monitored and corrected thousands of times per second against material thickness, composition and resistance
- Inverter resistance spot welding rated to 12,500 A DC on three-phase supply
- Display built into the gun — live weld feedback and fingertip parameter control at the workpiece
- High-pressure gun as standard equipment on this model, in the industry-leading squeeze-force class
- Water cooling maintained through a full 360 degrees of arm rotation
- Quick-connect arm docking
- WiFi connected: software updates, remote troubleshooting, weld logs exported by email
- Training videos and repair-procedure content onboard — a tech is productive inside an hour
- Single-sided welding from 60-plus preset programs: stitch, nail, carbon shrink, dent pulling
- Work orders assignable per technician for repair documentation and QC
The manufacturer's published OEM approvals sheet for the i4s lists GM, GMC, Cadillac, Chrysler, Fiat, Jeep, Tesla and Rivian. Those names are republished from Pro Spot's own materials as-is and are not a representation by CRTE — see the disclaimer below.
Specifications
| Condition | Pre-owned · inspected, serviced and weld-tested by CRTE |
| Serial | i4s-2139 |
| Input voltage | 208–240V three-phase, 60 A — verified on this unit's data plate, see photos |
| Spot gun | PS-700W high-pressure, liquid cooled, on-gun display (standard on the i4s) |
| Electrode force* | 1,240 lbs (565 daN) |
| Max welding current* | 12,500 A DC (three-phase) |
| Cooling* | Radiator/pump active loop, cooled through to the electrode caps |
| Cables* | 30 ft (10 m) power · 8.75 ft (2.67 m) weld cable |
| Protection rating* | IP 21 |
| Software platform* | Wirelessly upgradeable |
| Weight* | approx. 385 lbs (175 kg) |
| Crated dimensions* | approx. 48 × 40 × 60 in |
| Brand | Pro Spot |
| SKU | CRTE-u-i4s-2139 |
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Pro Spot and i4s are trademarks of Pro Spot International, Inc. Innovative Solutions CRTE is an independent reseller and is not affiliated with, authorized by, or endorsed by Pro Spot International. This unit is pre-owned and was inspected, tested and reconditioned by Innovative Solutions CRTE. All model specifications, ratings, and capability figures shown are taken directly from the manufacturer's own published documentation and are republished as-is; Innovative Solutions CRTE has not independently tested these figures and makes no claim as to their accuracy or validity. Any automaker (OEM) program, approval, or requirement referenced likewise reflects the manufacturer's published materials — not a representation by CRTE — applies to the equipment model as manufactured and supported by Pro Spot, and no shop certification transfers to the buyer with the machine. Buyers should confirm current specifications and OEM requirements directly with the manufacturer and the automaker.
