
Functions
- MIG / MAG welding: Gas metal arc welding with direct current (DC). Welding can be carried out with inactive/inert (MIG, e.g. argon) or active (MAG, e.g. CO2) gases. Gas and welding wire come from one torch head and enable welding work to be carried out with just one hand.
- MIG pulse welding: The pulse function also allows aluminum to be processed.
- DC TIG welding: Direct current (DC). Welding of almost all metals, such as steel, stainless steel, copper, brass and many more.
- Flux-cored wire welding (FLUX): MIG MAG welding without gas using a special wire.
- Automatic wire feed: The welding wire is automatically untwisted from the spool and pushed by the wire feed unit through a hose package several meters long to the contact tip in the torch. The speed of the wire feed is self-regulating, depending on the welding current.
- MMA / manual metal arc welding: Manual electrode welding is a universal welding process as it can be used under almost all conditions.
- Powerful plasma cutter: All conductive metals, e.g. standard steel, copper, stainless steel, brass, aluminum, titanium, etc. can be cut with ease.
- Contact ignition: A light touch of the workpiece is sufficient to ignite in plasma mode. There must be permanent contact with the workpiece for the cut.
- Anti-stick: If the electrode sticks to the workpiece, the welding current is automatically reduced. The electrode does not glow out and can be detached from the workpiece more easily.
Features & benefits
- Comprehensive accessory package: In the fully equipped version, the multifunctional device comes with an extensive accessory package that includes an automatic welding helmet as well as filler materials.
- Integrated LED light: As a special highlight, the welding machine has an integrated LED light to illuminate the wire guide, which enables the wire spool to be changed quickly even in poor visibility conditions. This is activated automatically when the protective cover is opened.
- Hot start function: Automatic voltage increase at start for better ignition results. Prevents the sticking of the rod electrode by briefly superimposing the set welding current and heats up the start of the weld seam more quickly.
- IGBT technology: Powerful, innovative technology that sets new standards in welding technology.
- Overheating protection: Switches on as soon as the device is overloaded and switches off as soon as the device cools down again.
- Smart cooling: A powerful fan enables maximum duty cycle to be utilized through excellent cooling.
- ST-Guard housing: Ergonomic, robust and safe to operate. The control panel is easily accessible and intuitive to operate.
- Welding current: Infinitely variable welding current. Set the welding current according to the material thickness of your base material.
- Voltage control: Variable voltage control to manually adjust the penetration and burn-off of the wire. The higher the voltage, the faster the wire burns off. A lower or higher setting can be selected depending on the material and material thickness. This allows the automatic wire feed to be adjusted slightly by speeding up or slowing down the burn-off.
- VRD (Voltage Reduction Device): Manually switching the VRD function on/off allows the output voltage of the welding machine to be reduced to a safe level to protect the operator when touching the electrode while not welding.

Technical Data
| Model | STAHLWERK CTM-250 Puls Pro welding machine |
| Output current MIG | 20 - 200 A |
| Output current MMA | 20 - 200 A |
| Output current HF TIG | 20 - 200 A |
| Duty cycle (40° C) MIG, MMA, TIG | 15 % at 200 A, 60 % at 100 A, 100 % at 77.5 A |
| CUT output current | 15 - 45 A |
| Duty cycle (40° C) CUT | 15 % at 45 A, 60 % at 23 A, 100 % at 17.4 A |
| Protection class | IP21S |
| Mains voltage | 1 x 230 V AC (±15 %) |
| Mains frequency | 50/60 Hz |
| Maximum mains current (I1max) MIG, MMA, TIG, CUT | 33.7 A, 38 A, 26.7 A, 28.2 A |
| Maximum effective mains current (I1eff) MIG, MMA, TIG, CUT | 13 A, 14.7 A, 10.3 A, 10.9 A |
| Weight | 15.7 kg |
| Dimensions L x W x H (mm) | 540 x 240 x 450 |
| Mains connection | CEE 7/7 Schuko plug |
| Standards | IEC 60974-1; EN 60974-10 (Class A) |
| Certified by | SGS Standards Technical Services Co, Ltd. |
Scope of delivery
- 1 x STAHLWERK CTM-250 PULS PRO
- Professional TIG welding torch WP-26F / hose package 3 meters
- TIG TIG accessory set 8 pieces
- Professional plasma hose set AG-60/SG-55 3 meters
- 4-piece plasma accessory set
- Water separator with pressure gauge and snap-on quick couplings (male, female)
- Connecting hose with snap-on quick couplings from the device to the water separator
- Professional MIG welding torch AK-15 / hose package 3 meters with Euro central connection
- 3-piece MIG accessory set (pre-assembled): 1 x gas nozzle, 1 x contact tip 0.8 mm, 1 x gas nozzle holder
- 1 x MIG MAG 15AK wear parts set 28 pieces
- TIG welding rods STAHLWERK ER70S-G3 steel
- STAHLWERK ER307Si TIG welding rods high-alloy stainless steel
- Tungsten electrodes / welding electrodes
- MIG MAG premium welding wire ER70S-6 SG2
- 1 x earth cable 3 meters
- 1 x electrode tongs 3 meters
- 1 x wire brush
- 1 x Gas connection hose with quick coupling 5 meters
- 1 x contact tip M6 x 28 - ø 0.6 mm
- 1 x contact tip M6 x 28 - ø 0.8 mm
- 1 x contact tip M6 x 28 - ø 0.9 mm
- 1 x contact tip M6 x 28 - ø 1.0 mm
- 1 x wire guide roller 0.6 mm & 0.8 mm with V profile
- 1 x wire guide roller 0.8 mm & 1.0 mm with V profile (pre-assembled)
- 1 x wire guide roller 1.0 mm & 1.2 mm with U profile
- 2 x wire guide roller 0.9 mm & 1.0 mm with K profile (knurled)
- 1 x Allen key
- 1 x assembly wrench
- 1 x AG-60 25-piece wear parts set
- 1 x pressure reducer
- 1 x STAHLWERK automatic professional welding helmet
- 1 x assembly wrench
- 1 x protective cover
STAHLWERK Schweissgeräte Deutschland GmbH was founded in 1998 and offers original welding equipment as a manufacturer. We are your professional and reliable welding equipment supplier. Product safety carries the registered trademark STAHLWERK. The company responsible for product safety is STAHLWERK Schweissgeräte GmbH
located in Bornheim
Mainstraße 4
53332
Germany. For questions regarding product safety
please contact us at the electronic address info@stahlwerk-schweissgeraete.de or by phone at +49 228 24331713. The person responsible for product safety is Alexander Hamann.