Cold welding machine Welding Can Be Done In Deep Cavities and Inaccessible Areas Where a TIG Torch Can’t Reach, Repairs Are Permanent. Not A Temporary Quick-Fix Solution, Deposits As Small As 100 Microns (0.1mm) Possible, Very Little Or No Heat Affected Zone Thereby No Weld Sink,. Minimal Machining Required. Hand Finishing Sufficient On Most Occasions