tag:blogger.com,1999:blog-2807403883562053852.post3195395046263834161..comments2024-03-27T08:40:31.785-06:00Comments on Clayton Cramer.: Sherline RepairClayton Cramerhttp://www.blogger.com/profile/03258083387204776812noreply@blogger.comBlogger7125tag:blogger.com,1999:blog-2807403883562053852.post-77011825141227867662015-10-19T14:32:35.532-06:002015-10-19T14:32:35.532-06:00Will: too far apart. My guess is that some handf...Will: too far apart. My guess is that some handfitting is required to deal with manufacturing tolerances. A few thousandths of an inch difference on hole locations and the same for star washer and backlash nut would be a problem I have shipped the base back to Sherline. They will have it Wednesday, and I suspect I will have it back next week.Clayton Cramerhttps://www.blogger.com/profile/03258083387204776812noreply@blogger.comtag:blogger.com,1999:blog-2807403883562053852.post-30328047300628866532015-10-18T21:00:43.997-06:002015-10-18T21:00:43.997-06:00Does it act like the parts are too far apart, or t...Does it act like the parts are too far apart, or too close? It would not surprise me to find that the holes in the block are not correctly spaced. If one of those seems to be true, you might try to measure the center to center of them, and call customer support to check what the spacing should be.<br /><br />Of course, they are not called out like that, typically. There would be a 0x0y data point, but they should be able to figure it out.<br /><br />If the spacing seems off, and you have compared new and old parts, getting this question sorted out before you start shipping parts back and forth may save you a fair amount of time. As part of this investigation, look closely at the original parts, and see if it looks like they have been modified to make them fit.Willhttps://www.blogger.com/profile/00722792638246578812noreply@blogger.comtag:blogger.com,1999:blog-2807403883562053852.post-62758551013095350832015-10-18T07:15:48.222-06:002015-10-18T07:15:48.222-06:00Tried that. The next step is to ship back to Sher...Tried that. The next step is to ship back to Sherline. The splines can't engage. I suspect there is a tolerance issue with the replacement parts.Clayton Cramerhttps://www.blogger.com/profile/03258083387204776812noreply@blogger.comtag:blogger.com,1999:blog-2807403883562053852.post-3529403309785475612015-10-17T21:13:47.911-06:002015-10-17T21:13:47.911-06:00That's why I suggested that you back out the b...That's why I suggested that you back out the button head so you can lift and turn the locking washer to look for the best engagement in those radial splines. If they have gotten shredded by forced rotation of the brass insert/nut, you may have to replace one or both parts for adequate engagement.<br /><br />It would seem that the way they are locking the insert, it is intended to be able to override it under severe conditions. Otherwise, it could be done better.<br /><br />If the spot facing the locking setup is bad, but the rest of it is ok, you could chuck it in a lathe, and remove a little from the back side, where it seats against the block. This should allow the part to rotate a bit more into the block, bringing a fresh engagement surface into alignment with the locking washer setup. <br /><br />Trying to put a washer under it, to shift the engagement spot, would not be a good thing to attempt, as it will cause interference with the locking setup, unless you get very creative with a notched washer. I doubt there is enough space to try it. And, it may cause other clearance problems.Willhttps://www.blogger.com/profile/00722792638246578812noreply@blogger.comtag:blogger.com,1999:blog-2807403883562053852.post-5497737536746485122015-10-17T09:20:00.051-06:002015-10-17T09:20:00.051-06:00Will: you are correct. It appears the star washer...Will: you are correct. It appears the star washer is not engaging the backlash nut adequately. I am suspecting one of these parts is out of the proper tolerances.Clayton Cramerhttps://www.blogger.com/profile/03258083387204776812noreply@blogger.comtag:blogger.com,1999:blog-2807403883562053852.post-14220317745659983732015-10-17T03:14:25.060-06:002015-10-17T03:14:25.060-06:00It appears that the large button head screw to the...It appears that the large button head screw to the side of the leadscrew, on the saddle block, is intended to lock that brass washer that is under it.<br /><br />That engages the brass nut the leadscrew runs through. Make sure the "anti-rotating" washer (actual name: backlash lock) properly engages the brass "backlash screw", before tightening it. Back off the button head enough to be able to lift the brash washer to find a good engagement fit to the backlash screw (nut, or insert, might be a better term). I'm assuming that the brass piece that the leadscrew runs through is threaded on the outer diameter, and threads into that saddle block. Willhttps://www.blogger.com/profile/00722792638246578812noreply@blogger.comtag:blogger.com,1999:blog-2807403883562053852.post-47602390455269674622015-10-16T18:48:22.900-06:002015-10-16T18:48:22.900-06:00Not to be a nit picker, but Sherline can't pos...Not to be a nit picker, but Sherline can't possibly be making their leadscrews .100" oversize. An oversize of .001" makes more sense.<br />jdunmyerhttps://www.blogger.com/profile/09304517693383396419noreply@blogger.com