8/3/2016
Here's my next project. It's not mine, but I'll be mechanically refurb'ing the head frame and checking out the motor on this Craftsman 100 dp#22.
This one was rode hard. Repainted twice, the spindle pulley and pinion gear shaft both have lots of free-play. The owner said there was some kind of nest behind the quill. It's a mess. This is how I received it.
8/4/2016
I got the head frame torn down and found several interesting issues on this machine.
Spindle Pulley Assembly
The assembly came out easy enough, but has a few problems.
The smallest step of the pulley has a few undulations.
The pulley was bumped by the spindle collar so much that the inner snap ring caused a very large burr on the spindle shaft. I had to use a file to cut down that burr in order to remove the pulley bearings.
I got the bearings removed and discovered that the inner race of the lower bearing wore the pulley shaft. I'll use green Loctite on the lower bearing during re-assembly.
The bearings turned very roughly and I could tell that they were very dry. I removed one shield from each and could see why the shaft got worn. I'll clean these and assess whether they can be reused.
The outer snap ring is a different style that I've never seen before.
Head Frame Trim
The head frame trim is also different than anything I've seen before. The imbrication lines are deep and very uniform. It appears that the pattern was pressed into the aluminum rather than engine-turned.
Hub, Pinion, and Spring Assembly
Here's the reason there was so much horizontal play in the pinion shaft. The dog point on the pinion shaft retaining screw is badly worn. To re-use this bolt, during reassembling, I'll add to, or remove the fiber washer to turn the point 90 degrees when tightened.
The spring has noticeable wear near the tang end.
The feed handle knobs and rods were replaced. Heli-coils were needed to attach the knobs.
The hub is no longer round and has a small crack near one of the rods.
8/6/2016
The first cleaning with mineral spirits is complete. Brake cleaner and some wire-wheeling to go.
8/7/2016
Final cleaning is complete and despite all the issues listed above, this drill press is going together nicely.
The hub, pinion, and spring assembly is complete.
The spindle pulley assembly is complete. I cleaned the original bearings, but did not use them. I had another set of used bearings that were in much better shape. Those were cleaned and repacked. I'll apply some green Loctite to the inside of the inner race of lower bearing at the time of pulley installation. I'll also clean the pulley steps more once I get the dp running.
8/8/2016
The quill assembly is back together. The chuck was torn down, cleaned and reassembled. New sealed bearings and new o-ring washers were installed. The chuck will get polished after I get the DP running.
As I stated above, to re-use the pinion shaft retaining screw, I need to have the dog point turned 90 degrees from the original installation when the bolt is tight. To accomplish that, I made a new, slightly thicker washer from left-over shower floor pan liner. Perfect!
8/9/2016
8/10/2016
dp#22 is complete. Despite its looks and the issues listed above, this drill press runs nicely!