12-03-2013, 03:16 AM
What little extra time I had was spent re-building a Jacobs 18N chuck that I bought off e-bay. Apparently "good working order" means different things to different people. 
Outwardly it didn't look too bad but it was locked up, almost solid when you put the key to it. On top of that, the R8 shank was packed, almost full, with some kind of fibrous-mud type substance.
Fortunately, when I got it taken apart, it was just gummed up something fierce. A couple hours sitting in some Simple Green, another couple hours in some Evapo-rust, some time spent with some #00 steel wool, a liberal application of high-pressure lithium grease upon re-assembly, and VIOLA!
![[Image: jacobs18n.JPG]](http://www.arcaneiron.com/machines/jacobs18n.JPG)
A very smooth and tight chuck for my mill. I got it cheap enough that it was well worth it, even with the extra work.
-Ron
Outwardly it didn't look too bad but it was locked up, almost solid when you put the key to it. On top of that, the R8 shank was packed, almost full, with some kind of fibrous-mud type substance.Fortunately, when I got it taken apart, it was just gummed up something fierce. A couple hours sitting in some Simple Green, another couple hours in some Evapo-rust, some time spent with some #00 steel wool, a liberal application of high-pressure lithium grease upon re-assembly, and VIOLA!
A very smooth and tight chuck for my mill. I got it cheap enough that it was well worth it, even with the extra work.
-Ron
11" South Bend lathe - Wells-Index 860C mill - 16" Queen City Shaper