10-03-2019, 12:05 PM
After long last, I've built a bench to mount my vintage Emmert on. After a lot of work, I got the bench side installed into the mortises and the tilting lever in place. After doing research, many recommended that i unscrew the front half to reduce the weight of the thing for the install. I did this.
Now everything is in place but I'm having trouble getting it threaded back together. I've rotated the threads counter-clockwise until the male threads click down into the female part. But I get a lot of resistance after about 1/2 turn clockwise. This happens after multiple attempts and ensuring the shaft is square with the back vise face. After all the time and expense, I don't want to ruin things by cross-threading and cracking a casting. These are Acme threads so the chance of being off a full pitch seems unlikely. I am wondering if this is by design -- so when using I extend the vise out to its full extension, there is a lot of resistance so I know to stop before the front half falls on my toes.
Does anyone have a working Emmert to confirm my theory -- when you extend the vise to full opening is it much harder at the very end? Should I just really tighten the first few turns on the way back in?
Now everything is in place but I'm having trouble getting it threaded back together. I've rotated the threads counter-clockwise until the male threads click down into the female part. But I get a lot of resistance after about 1/2 turn clockwise. This happens after multiple attempts and ensuring the shaft is square with the back vise face. After all the time and expense, I don't want to ruin things by cross-threading and cracking a casting. These are Acme threads so the chance of being off a full pitch seems unlikely. I am wondering if this is by design -- so when using I extend the vise out to its full extension, there is a lot of resistance so I know to stop before the front half falls on my toes.
Does anyone have a working Emmert to confirm my theory -- when you extend the vise to full opening is it much harder at the very end? Should I just really tighten the first few turns on the way back in?