There is a guy advertising a ht4001 on ebay over here at the moment, out of curiosity i googled it and found that its a 340 amp power supply and a water injected arc, my question is why are the cut speeds so slow? The cut speed on 12mm is only about double that of my max 100 and a mile slower than an ht2000, is there something im missing? the guy claims its not 25yr old technology??
The HT4001 is a 400 amp, water injected oxygen or nitogen plasma cutting system. It is rated at 100% duty cycle for cutting up to 2" thickness on stainless steel and aluminum and up to 1-1/4" on steel. Cut speed on 1" steel is 50 inches per minute, which is about 4 times faster than a Max100!
This is a system that was designed to cut 3 shifts a day, 365 days a year at full output power in large industrial applications. It can be paralleled with a second power supply to provide up to 750 amps of cutting power for heavier non-ferrous plate (4" thick stainless). It has a liquid cooled torch, a refrigerated water chiller system, and a microprocessor controlled power supply that helps to provide consumable life that is about 10 to 20 times the consumable life of an air plasma system. You will find that the specifcations for cutting thinner materials will show speeds that are not much faster than some of todays air plasma systems, not because the system cannot achieve these speeds (it actually can cut 9mm at speeds that are much faster than the cut charts shows), but because the large gantry machines that these torches are typically mounted on become unstable at high cutting speeds. Some of these cnc plasma machines are up to 50' wide and up to 350' long, with as many as 4 plasma torches and up to 18 oxyfuel torches mounted on the same gantry.
This unit was replaced about a year ago in Hypertherms product line with the HPR-400 and HPR800 plasma systems. There are thousands of these HT4001's throughout the world in large industrial applications.
Jim Colt Hypertherm