The Quill Snap Ring
In my Craftsman Drill Press Evolution post, I mentioned that at some point, a groove was added to the lower quill to allow for a snap ring.
I believe that snap ring may have been designed for use with the mortising attachment or other quill attachments when removing the original feed stop bracket. It also serves another very important purpose. Here's how...
Prior to the snap ring, the quill gasket along with the feed stop bracket clamped to the quill act as a bumper when raising the quill.
The picture below on the left is how I found the feed stop bracket on dp#16. Over time, after many cycles of lowering and raising the chuck, the feed stop bracket slid down the quill.
The picture on the right is after I fully re-seated the feed stop bracket on the quill. The difference is about 3/8".
Below are a couple pictures of the top of the quill when fully raised. With the feed stop bracket out of place, the picture on the left shows how the quill raises higher into the head frame allowing the spindle collar to make contact with the bottom of the spindle pulley shaft. The picture on the right shows the proper position of the quill when the feed stop bracket is fully seated on the quill.
When the spindle collar makes contact with the spindle pulley, the outer race of the lower bearing bumps up against the retaining screws. That's when the screw becomes bent and damaged. Sometimes, it's nearly impossible to remove them.
The quill gasket installed above the snap ring provides an absolute stop for the quill and prevents damage to the retaining screws.
6-28-2018
Reseating the Feed Stop Bracket
Quote:
Originally Posted by KJ2018
Have the subject drill press that I began work on. Mainly clean up so far. Has a light grinding noise while running.
Quote:
Originally Posted by FrankLee
The grinding noise could be the feed stop bracket rubbing on the threaded spindle thrust collar. Verify that the feed stop bracket is fully seated onto the quill. I can see a gap where the quill bumper should be contacting the head frame casting.
Quote:
Originally Posted by KJ2018
Let me ask you about that gap. What do I need to do to correct that? ...
Quote:
Originally Posted by FrankLee
- lower and lock the quill
- loosen the nut at the bottom of the feed stop rod
- loosen the nut/bolt on the feed stop bracket
- push up the bracket onto the quill until fully seated
- re-tighten nuts and bolt
- unlock quill
In the past, I have used a low strength thread locker/bearing mount compound on the quill/feed stop bracket on machines without the snap ring.
The base and column from dp#16 cleaned up nicely. On later models, that T-slot plateau is painted.
6-6-2015
I discovered that dp#15, a 100 model
103.23131, has the same bracket/quill/spindle/pulley/screw issue as dp#16:
This morning, I enlarged and tapped the left-rear hole on this Craftsman DP table for the anchor bolt for the Float-Lock vise. That thing is nice!
15157.14380
15159.14444
6-13-2015
More progress on dp#16.... most of it is cleaned-up and it's going back together.
I discovered another interesting thing on this spindle pulley. There is a small hole drilled from the first step through to the underside near the shaft. I can't determine whether this was from the factory or a previous owner. I'm not sure, but I believe it's there to help remove or possibly lube the top bearing.
This pulley also has some scoring on the shaft from the lower bearing. A previous owner used some kind of adhesive to secure the inner race. I needed a puller to remove the lower bearing. The upper bearing and spacer slid right off.
15166.14660
6-20-2015
dp#16 is complete and very nice!.