HP-1.1 Heavy-Duty Ceramic Fusion Butt Welder for Large Stranded Copper & Aluminum
Aluminum, Brass, Bronze, Copper, Nickel
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Butt Welder
GP-2 Ceramic Fusion Butt Welder for Medium Stranded Copper & Aluminum 12–4 AWG
The GP-2 steps into medium-to-heavy stranded conductor territory within Micro Weld’s GP Ceramic Fusion Series, handling 12 AWG through 4 AWG copper and aluminum — the range that covers building wire, power distribution cable, and general industrial conductor. Like all GP models, the ceramic sleeve contains the weld flash during the join, producing a clean, burr-free joint without grinding or secondary finishing. The GP-2 runs on 240V or 480V single phase and draws up to 57A, reflecting the higher current demands of this conductor size. Heat is managed by 99-step SCR control for fine, repeatable selection across the full AWG range, and mechanical spring upset keeps the clamping system air-free.
- 240V or 480V, 60Hz, single phase
- Solid state heat control
- Hand operated clamping mechanism; Spring upset mechanism
- Mounted lamp; Ceramic sleeve sample pack (included)
- Bench mount
Metal:
Aluminum, Brass, Bronze, Copper, Nickel
Construction:
Stranded
Stranded Copper Welding Range:
12 AWG (4 mm²) - 4 AWG (25 mm²)
Solid Aluminum Welding Range:
12 AWG (4 mm²) - 4 AWG (25 mm²)
Max Current Draw:
57/28/14/11
Single Phase Transformer:
Yes
Heat Selection Method:
99 STEP SCR
Upset Method:
Mechanical
Air Requirements:
n/a
Mounting Truck Type:
Bench Mount or 4 Wheels
Dimensions & Weight:
Welding Die Height: Bench: 11 in (27.94 cm) Truck: 42 in (106.68 cm)
Width Across the Front: Bench: 15 in (38.1 cm) Truck" 24 in (60.96 cm)
Depth to the Back: Bench: 9 in (22.86 cm) Truck: 24 in (60.96cm)
Height: Bench: 20 in (50.8cm) Truck: 51 in (129.54 cm)
Weight: Bench: 170 lbs (77.27 kg) Truck: 214 lbs (97.27 kg)
Width Across the Front: Bench: 15 in (38.1 cm) Truck" 24 in (60.96 cm)
Depth to the Back: Bench: 9 in (22.86 cm) Truck: 24 in (60.96cm)
Height: Bench: 20 in (50.8cm) Truck: 51 in (129.54 cm)
Weight: Bench: 170 lbs (77.27 kg) Truck: 214 lbs (97.27 kg)
- Post Type Truck
Butt Welder Upgrades to Improve Your Precision and Productivity
Upgrade your Micro Weld butt welders with world-class safety & technology accessories. You’ll get the same quality, rugged welders with the safety features you need, creating uniformity with every machine and consistency with every training.
- New Finger Safe Covers & Components
- 24V Control Circuit
- Interlock Switch on Rear Access Panel
- Solid-State Heat Control
Applications
Splicing stranded copper building wire in 12–4 AWG on continuous production lines to maintain feed without stopping to re-thread new coils through stranding or insulating equipment
Joining stranded aluminum conductor ahead of insulating and jacketing operations for residential, commercial, and industrial power distribution cable manufacturing
Welding medium stranded conductor for control cable and multi-conductor power assemblies where consistent joint geometry is required to maintain insulation wall integrity downstream
Rejoining conductor on take-up, pay-off, or bunching equipment in the 12–4 AWG range to reduce downtime between coil changes and keep high-throughput lines running
Real-World Benefits
- Ceramic sleeve flash containment delivers a burr-free joint on medium-to-heavy stranded conductor — eliminating post-weld grinding that would otherwise be required at this conductor size to clear the insulating tooling.
- 99-step SCR heat control gives operators fine, repeatable heat selection across the full 12–4 AWG range, supporting consistent weld quality when running mixed sizes or alloys through a single machine.
- 240V/480V dual-voltage input matches the electrical infrastructure typical of medium and heavy industrial production environments, without requiring a step-down transformer.
- Hand-operated clamps with spring mechanical upset eliminate air supply dependency at a conductor size where some competing equipment would require pneumatic actuation — keeping installation simpler and maintenance overhead lower.
- Bench or 4-wheel truck mounting keeps the GP-2 repositionable as line layouts change, without committing to a fixed-floor installation.
Comparison to Similar Models
The GP-2 occupies the middle of the five-machine GP Ceramic Fusion Series by conductor size. Below it, the GP-1 covers 20–8 AWG with the option of 120V input; above it, the GP-3 handles larger stranded conductor where the GP-2’s capacity ends. The GP-2’s shift to 240V/480V-only power reflects the increased current demand of 12–4 AWG conductor — operators moving up from the GP-1 should confirm their facility power before specifying. The HP-1.1 rounds out the top of the series for the largest stranded cross-sections.
If your stranded conductor consistently runs in the 12–4 AWG range, the GP-2 is the right fit. For lighter gauge work, the GP-1 covers it; for heavier conductor, move to the GP-3 or HP-1.1.
Best For
Building wire producers, power distribution cable manufacturers, and industrial conductor operations joining stranded copper or aluminum in the 12–4 AWG range who need burr-free ceramic fusion welding with 99-step SCR heat control on 240V or 480V plant power.
