12 products
Cold Welding Machines
Hand-held and bench machines that join non-ferrous wire by pressure alone, from 0.05 mm hair-fine wire up to 4.50 mm copper.
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Cold Pressure Welding Since 1995
Join Copper and Aluminium Wire Without Heat Flux or Filler
SGT cold welders make a solid-phase joint as strong as the parent wire and with the same electrical characteristics — in a cycle that takes seconds and needs no operator training.
Dies Built to Your Wire
Welding Dies and Drawing Dies Machined to Your Own Wire Sizes
Industry-standard dies from 0.10 mm to 25.0 mm, plus PCD, nano-coated and tungsten carbide drawing dies and extrusion tooling — cut for round or profile wire to your drawing.
Up to 25 mm Aluminium Rod
Hydraulic Pressure Welders for Rod Breakdown and Rectangular Strip
The CHY series covers 1.00 mm to 20.00 mm copper rod and up to 25.00 mm aluminium rod, with machines built for continuous casting and rolling lines and rod breakdown mills.
Chamber Welding Consumables
Quartz Crucibles That Replace Ceramic Tube on Conductor Welders
Hole tolerance of ±0.01 mm against ±0.1 mm for ceramic, a 1300 °C softening point and a transparent wall the operator can actually see the joint through.
What We Make
Four Things a Wire Plant Needs on the Same Shop Floor
SGT has manufactured cold pressure welding equipment in Shunde, Foshan for 30 years. The range covers four things a wire plant needs on the same shop floor: machines that join non-ferrous wire without heat, the dies those machines close onto, drawing and extrusion tooling for the lines downstream, and the butt welders and quartz crucibles used for stranded conductor and cable.
8 products
Hydraulic Pressure Welders
The CHY series covers copper from 1.00 mm to 20.00 mm and aluminium to 25.00 mm, including rectangular strip.
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5 products
Cold Welding Dies
Industry-standard dies for wire from 0.10 mm to 25.0 mm, single or double cavity, round or profile.
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4 products
Diamond Drawing Dies
Drawing and stranding dies from 0.015 mm to 40.00 mm, chosen by wear rate rather than by price per die.
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2 products
Extrusion Dies and Tips
Compression tooling engineered for concentricity, so the insulation wall can be run thin without breaking through.
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2 products
Conductor Butt Welding Machines
Chamber welding for copper conductors from 1.0 mm² to 120 mm², using a quartz crucible instead of ceramic.
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2 products
Quartz Glass Tubes
Hole diameter 0.300 mm to 8.200 mm, held to ±0.02 mm standard and ±0.01 mm high precision.
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2 products
Wire Pointing Machines
Conical points rather than triangular, on wire from φ3.55 mm down to φ0.66 mm and on 8.0 mm copper rod.
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1 products
Electrical Butt Welders
The UN series from 1 kVA to 40 kVA, for steel, aluminium, brass and pure copper wire and rod.
Browse the rangeProduct Range
Machines Dies and Consumables Across the Whole Wire Size Range
Eighteen of the 38 products in the catalogue, from an 820 g hand welder for 0.05 mm wire to a 2000 kg press for 25 mm aluminium rod.
Cold Welding Machines
PW10 Portable Cold Welder for 0.05-0.50 mm Wire
The finest machine in the range — 0.05 mm copper at 820 g in cast stainless steel.
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Cold Welding Machines
DA10 Desk Cold Welder for 0.10-0.50 mm Copper
The bench-mounted DA10 build at 3.5 kg, for fine copper and aluminium wire from 0.10 mm.
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Cold Welding Machines
DB30 Desk Cold Welder for 0.35-1.30 mm Copper
Double cavity dies as standard, copper 0.35-1.30 mm and aluminium 0.30-1.40 mm at 13 kg.
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Cold Welding Machines
DB100 Desk Cold Welder for 1.00-4.00 mm Copper
Bench or trolley mounted, copper 0.90-4.00 mm and aluminium 1.00-5.50 mm on a 36 kg ductile cast iron frame.
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Cold Welding Machines
DJ100 Desk Cold Welder for 1.00-4.50 mm Copper
The largest desk machine — copper to 4.50 mm and aluminium to 6.00 mm on an 80 kg frame with oversized dies.
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Hydraulic Pressure Welders
CHY100 Hydraulic Pressure Welding Machine
The smallest hydraulic welder — copper 1.00-4.00 mm and aluminium 1.00-6.00 mm at 130 kg.
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Hydraulic Pressure Welders
CHY200-B Hydraulic Pressure Welding Machine
Copper 2.00-6.00 mm and aluminium 2.00-8.00 mm on a 380 kg frame with a 1.5 kW motor.
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Hydraulic Pressure Welders
CHY400-B Hydraulic Pressure Welding Machine
Copper 4.00-9.00 mm and aluminium 4.00-12.00 mm, supplied 3P 380 V 50 Hz on a 760 kg frame.
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Hydraulic Pressure Welders
CHY700-B Hydraulic Pressure Welding Machine
Copper 7.00-12.00 mm and aluminium 7.00-20.00 mm on a 1500 kg frame at up to 8.0 MPa.
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Hydraulic Pressure Welders
CHY800 Hydraulic Pressure Welding Machine
The largest frame in the range — copper rod 8.00-20.00 mm and aluminium rod 8.00-25.00 mm.
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Conductor Butt Welding Machines
HD016 Conductor Butt Welding Machine for 1.0-16.0 mm²
Single phase 220 V chamber welder with 12 gears and a quartz crucible, for bunched copper conductor.
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Conductor Butt Welding Machines
HD120 Conductor Butt Welding Machine for 35-120 mm²
Three phase 380 V 50 kVA chamber welder with pneumatic clamping, for large stranded conductor and cable.
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Diamond Drawing Dies
Nano Diamond Coated Drawing Dies
Zero wear across the die life, from φ0.50 mm to φ120 mm, for stranding bunching compacting and drawing.
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Diamond Drawing Dies
PCD Wire Drawing Dies
Polycrystalline diamond dies from φ0.03 mm to φ20.00 mm for drawing and to φ40.00 mm for stranding.
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Diamond Drawing Dies
Tungsten Carbide Wire Drawing Dies
TC dies from 0.015 mm to 32.0 mm, in a large range of nib and hole sizes.
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Quartz Glass Tubes
Quartz Glass Tube Welding Crucibles
Hole diameter 0.3-8.2 mm, length and outside diameter 6-20 mm, ±0.01 mm on the high precision grade.
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Cold Welding Dies
Cold Welding Die Programme From 0.10 mm to 25.0 mm
The full die matching chart — SD1 SD2 DA100/DB100 and CHY sets across every machine in the range.
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Wire Pointing Machines
SGT170 Wire Pointing Machine for Intermediate Drawing
Conical points from φ3.55 mm in to φ0.66 mm out, on eight grooves with nitrided 38CrMoAl rolls.
View specificationsWhat Problem We Solve
Downtime Is the Cost Not the Joint
Every product in the range exists because something on a wire line stops, and stopping is what costs money.
A Broken Wire Stops the Whole Line
One break on a drawing block or an extrusion line means scrap conductor, a restart and lost hours. A cold weld takes seconds, needs no power at the machine for the portable models and produces a joint that will pull through the next die.
Heat Welding Changes the Metal
Brazing and resistance welding anneal the wire and leave an oxide and a heat-affected zone. Cold pressure welding is solid-phase: no heat, no flux, no filler, and the joint keeps the conductivity of the parent wire.
Copper to Aluminium Will Not Braze
Transformer and winding shops need aluminium windings terminated in copper. Cold welding joins dissimilar non-ferrous metals directly, and special dies join two wires of different diameter.
Dies Wear Out Faster Than the Line Can Afford
Tungsten carbide is economical until the wear rate starts costing shifts. PCD dies last longer than carbide, natural and single-crystal diamond; nano diamond-coated dies run at least ten times longer than carbide on the same wire.
Who We Serve
Industries That Run SGT Equipment
The plants that buy cold welders are the ones where a metre of scrap conductor is the least expensive part of a break.
Wire and Cable Manufacturing
From rod breakdown to the extruder, every break is a restart. SGT supplies the welders, dies and crucibles that keep the length continuous.
What we supply
Enamelled and Magnet Wire
Fine wire lines run at speed and break small. A hand welder at the block puts the line back under load in seconds.
What we supply
Transformer and Motor Winding
Aluminium windings with copper terminations are a cold welding job — there is no braze that does it cleanly.
What we supply
Wire Drawing Mills
Point the wire, weld the break, draw through a die that holds its size. Three problems, one supplier.
What we supply
Automotive Wiring Harness
Fine stranded automotive conductor is the hardest case for chamber welding, and the one where the crucible decides the result.
What we supply
Nail Fastener and Wire Rope
Steel is outside cold welding. The UN series covers it, from 0.6 mm up to 4.5 mm on the largest frame.
What we supplyWhy Customers Choose SGT
Thirty Years of Building the Same Machines Better
Numbers from the published specification, not from the brochure.
30Years Building Cold Welders
Manufacturing cold pressure welding machines, dies and wire machinery in Shunde, Foshan since 1995.
0.05–25 mmCopper Wire Range
Hand-held welders start at 0.05 mm; the CHY800 hydraulic welder takes copper rod to 20.00 mm and dies are cut to 25.0 mm.
0.05–50 mmAluminium Wire Range
Aluminium and its alloys up to 50.00 mm across the machine and die programme.
31Export Markets
Shipped to buyers across Asia, the Middle East, Europe, Africa, the Americas and the Pacific.
±0.01 mmQuartz Crucible Tolerance
Hole diameter tolerance on the standard quartz tube; high-precision grade holds ±0.01 mm.
-1% / +2%Die to Wire Tolerance
The published tolerance band between a cold welding die and the wire it is cut for.
Exported To
KoreaMalaysiaPhilippinesThailandSingaporeVietnamBangladeshIndiaPakistanKazakhstanUzbekistanSaudi ArabiaUAEIsraelSyriaJordanTurkeyIranRussiaPolandCzech RepublicFinlandArgentinaColombiaBrazilVenezuelaUnited StatesEgyptSenegalSouth AfricaFiji
Capacity Chart
Welding Capacities of SGT Cold Pressure Welding Machines
The published capacity table. Find the wire, then find the machine.
| Model | Copper Wire | Aluminium Wire |
|---|---|---|
| PB10 / PW10 / DA10 | 0.10 mm – 0.50 mm | 0.10 mm – 0.50 mm |
| PA30 | 0.30 mm – 0.90 mm | 0.30 mm – 1.00 mm |
| DA30 / DB30 | 0.30 mm – 1.20 mm | 0.30 mm – 1.40 mm |
| DA100 / DB100 | 1.00 mm – 3.25 mm | 1.00 mm – 5.00 mm |
| DJ100 | 1.00 mm – 4.50 mm | 1.00 mm – 5.50 mm |
| CHY100 | 1.00 mm – 4.00 mm | 1.00 mm – 6.00 mm |
| CHY200 | 2.00 mm – 5.00 mm | 2.00 mm – 8.00 mm |
| CHY400 | 4.00 mm – 8.00 mm | 4.00 mm – 14.00 mm |
| CHY700 | 7.00 mm – 13.00 mm | 7.00 mm – 25.00 mm |
Aluminium ranges run wider than copper across the programme because aluminium upsets at lower pressure. Rectangular sections are calculated from the cross-sectional area.
Solutions
Built Around the Line Not Around the Machine
Four workflows that cover what actually happens between a break and a running line again.
Solution
Continuous Drawing Without Breaks
A break is unavoidable. What is avoidable is threading the whole line again.
See the workflowSolution
Copper to Aluminium Joining
Dissimilar non-ferrous metals joined in the solid phase, at the same electrical characteristics as the parent wire.
See the workflowSolution
Stranded Conductor Jointing
A homogeneous pore-free and burr-free joint that goes into the extruder nozzle with only minor dressing.
See the workflowSolution
Die and Tooling Programme
Machines are bought once. Dies are bought every month, and they decide what the machines actually produce.
See the workflowKnowledge Center
Process Guides and Buying Guides
Written from the same specification data as the product pages.
Process Guide
How Cold Pressure Welding Works and When to Use It
A solid-phase joint made by pressure alone: what cold welding does to the metal, which materials it takes, and where it beats a heat process.
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Process Guide
Chamber Welding for Stranded and Bunched Conductors
How conductor butt welding produces a homogeneous pore-free and burr-free joint that goes straight into the extruder.
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Comparison Article
Quartz Glass Tube Against Ceramic Tube for Conductor Welding
The published feature-by-feature comparison, the cost of one conductor break, and the 28 AWG validation behind the claim.
Read the guideFAQ
Questions Buyers Ask Before Ordering
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Send the Wire Size and We Will Send the Machine
Give us the material, the diameter and the country you are in. You will get the machine model, the die set and the voltage build, not a catalogue.