Actually it has not been discussed a lot, I already did a search before posting. The first link is for a 3/8, which I don't need. It was no help. I already read the second, thanks for the comparison for IR. The third link is all about oiling, so it isn't much help. Aircat says that the TC never needs oil added because its sealed in an oil bath. It still needs oiled daily. The TH needs greased, and they recommend it for industrial use, so does it mean that it will last longer than the TC? I was really wondering about the 1000 TH, because there are not really any reviews on it. When I said a comparison, I meant for the TC vs TH. Hope that this cleared up anything. Eschoendorff please do go on, only if you think that you can help.