I have been methodically troubleshooting the irregular impression I get on my 15-21 and have since learned about wear on the rails. I am at a point where I’m wondering if I need to do something really serious or if the amount of wear isn’t a big deal and I can somehow adjust the bearings to compensate. The upper rails that the impression bearings ride on are worn by .007 on the operator side and .002 on the opposite side at the head of the press and the wear tapers off within about 8″ down the bed of the press. I bit the bullet and embarked on adjusting the carriage bearings (did this several times thinking I was doing something wrong) and still had less impression at the head of the bed. This press has an adjustable bed so I even cleaned the wedges thinking the bed was not raising and lowering evenly. That helped a little bit.
I would rather not disassemble my press and send it out to have the rails planed because I had to knock a hole in my studio wall to get the press in and now that’s sheetrocked up. (should have put a door in!)
Someone mentioned that someone who does hand metal “scraping” might be able to even out the side with the most wear (.007) but it’s a lost art and possibly hard to find that person.
If I was able to get this one side scraped with press in place, is it a reasonable thought to adjust the bearings on that side so they ride level with the other side? I’m thinking that this metal scraping will be costly but less so than sending the press out. The opposite side impression rail being worn .002 seems not worth scraping since it would take even longer and seems negligible. I would love feedback on this. I’m particularly in need of suggestions regarding how much to adjust bearings to compensate for wear like this.