The ST 4000 U/D is a liquid-cooled TIG torch, 8 m long, with U/D buttons for current control from the handle. At 100% duty cycle it carries 350 A DC and 270 A AC, the highest rating among the ST torches in the Böhler Welding price list. It takes electrodes from 0.5 to 4.0 mm. It is the same torch Böhler supplies in the liquid-cooled TERRA NX 400 TLH and URANOS NX 4000/5000 packages, here in the 8 m length.
Who it is for
For welders who work long hours at high currents. The U/D buttons change the current without leaving the weld. The torch needs a cooling unit and CL10 coolant; the price list does not specify it for the URANOS NX 2200 or TERRA NX 270 TLH.
| Part number | 81.32.261 |
|---|---|
| Brand | Böhler Welding |
| Model | ST 4000 U/D |
| Version | U/D: up/down buttons for current control |
| Cooling | liquid |
| Length | 8 m |
| Electrode diameter | 0.5 to 4.0 mm |
| DC rating | 350 A at 100% duty cycle |
| AC rating | 270 A at 100% duty cycle |
| Consumables | standard (17/18/26 series) |
| Pack quantity | 1 pc |
Fits
- TERRA NX 320/400 TLH (cooling unit WU 230)
- URANOS NX 2700/3200 AC/DC (cooling unit WU 2000)
- URANOS NX 4000/5000 AC/DC (cooling unit WU 3000)
- URANOS NX 4000/5000 GSM (cooling unit WU 3000)
Also order
- Collets (3 pcs): 1.0 mm, 1.6 mm, 2.4 mm, 3.2 mm, 4.0 mm
- Collet bodies (3 pcs): 0.5 to 1.2 mm, 1.6 mm, 2.4 mm, 3.2 mm, 4.0 mm
- Ceramic nozzles (10 pcs): No. 4, No. 5, No. 6, No. 7, No. 8, No. 10, No. 12
- Back caps (3 pcs): long and short
- Cooling unit matching your machine (see Fits): WU 230, WU 2000, WU 3000
- CL10 coolant, 10 kg
FAQ
U/D, FX U/D or DigiTig?
All ST 4000 versions are rated at 350 A DC and 270 A AC at 100% in the price list. The ST 4000 FX U/D 8 m has a flexible neck and fits the same machines as the U/D. The DigiTig and FX DigiTig versions are assigned to URANOS NX only, without the TERRA NX 320/400 TLH.
Which consumables fit the ST 4000 U/D?
Standard 17/18/26 series parts: collets 1.0 to 4.0 mm, collet bodies in the same sizes, ceramic nozzles from No. 4 (6.4 mm) to No. 12 (19 mm) and a long or short back cap. Match the collet and collet body to the electrode diameter.
4 m or 8 m?
The 8 m length gives you reach when you weld away from the machine, for example on a large structure, without moving it. For bench work the ST 4000 U/D 4 m is enough.
Spawlab is an authorised Böhler Welding distributor and service partner in Poland. VAT invoice, courier shipping from Krotoszyn, also to EU countries.
