I went to replace the lead screw nut on one of my FP1's yesterday, received from one of our suppliers online. Well I was surprised to find out the nut I got was slightly different than originally fitted on the machine, the first picture shows the two side by side and the differences. Apparently the length but the critical difference is the lubrication distribution method. The machines with the sight glass have the slot that lets the oil fill up the space between the end or the nut and the feed mechanism so it's shorter, they also have a short piece or tubing that rolls around when the screw turns picking up oil and lubricating the screw as it does this. On the machine I'm working on it has a hole drilled through to the threads to get oil the screw. I thought about sending it back but after looking at the two I thought I would try to make it work. I set it up and drilled the hole to lubricate the threads and drilled and bored a hole to fit a plug to block the oil from escaping through the groove shown in the second picture. I turned that and put it in with some super strength Loctite #620 leaving it a little long. The third picture shows it indicated in a 4 jaw chuck. I turned the plug until the indicator showed it proud about .0005", I didn't want to take a chance of accidentally under cutting it and ruining the whole plan. I put it in and pumper some vactra number 4 in it to make sure everything was getting oil as it should before putting it all back together. Sorry for the giant diatribe but I don't know how when trying to explain things. Dan
PS. The last picture shows a tool I made for removing the spanner nut that holds that nut in.
PS. The last picture shows a tool I made for removing the spanner nut that holds that nut in.
