Dunlap drill press question

[over40pirate]

When I advance the quill on my Dunlap dp, the step pulley drops about 3/16". Is this normal?
Any owner that can check theirs?
Got press from orig. Owner, and it runs real smooth.
Thanks

 

[FrankLee]

When I advance the quill on my Dunlap dp, the step pulley drops about 3/16". Is this normal?
Any owner that can check theirs?
Got press from orig. Owner, and it runs real smooth.
Thanks

No, not normal.

There are two set screws in the spindle pulley. They probably loosened which allowed the pulley shaft to drop a bit.

Each of those set screws tighten against flats on the shaft. You may need to remove the spindle/quill assembly to hold the shaft up to tighten the set screws.

 

[over40pirate]

No, not normal.

There are two set screws in the spindle pulley. They probably loosened which allowed the pulley shaft to drop a bit.

Each of those set screws tighten against flats on the shaft. You may need to remove the spindle/quill assembly to hold the shaft up to tighten the set screws.

Ive had it apart a number of times. The 2 pulley set screws are tight, and riding on the flats on the sleeve. The sleeve and pulley moves about 3/16" up and down. There is a snap ring on bottom of sleeve, that prevents it from moving up.

 

[FrankLee]

The spindle pulleys on these 12-1/4" models have a washer peened into the underside. This washer rides on the bushing pressed into the head casting. Is that washer present? Sometimes they are so loose, they fall out.

Also, please post a photo of the top of the pulley.

 

[FrankLee]

I found a couple of my pictures that will help. These were from a refurb I completed last November.

The photo below is the as found condition. Notice that the pulley shaft is recessed into the pulley probably 3/32".




During reassembly, the pulley shaft would not go much higher into the pulley than before. There was still vertical movement like you're experiencing. Upon further investigation, I noticed a slight ridge at the top of the pulley bore. This ridge prevented the needed vertical adjustment of the shaft.


In the photo below, you may be able to see the bevel at the top of the pulley bore I cut with a large countersink bit. I removed that ridge and was the able to eliminate that vertical slop. Notice that the top of the pulley shaft now protrudes through the pulley. I also filed small grooves in the top of the pulley shaft to mark the location of the centers of the flats. I also marked the locations of the set screws on the pulley with a sharpie. Alignment was a no-brainer.

 

[FrankLee]

It looks like over40 "fixed" his issue. From his thread on owwm:

I adjusted the feed stop collar. Took the play out.

Adjusting stop collar took out the vertical play in the pulley.

No, it didn't.

The pulley is on all the way.

No, it isn't.


This GJ thread is his first since Sept 2016, so he likely won't be back anytime soon.

Anyway, to add keywords for future searches, the REAL issue can occur on the following 12-1/4" drill presses:

• Dunlap models 103.23620, 103.23621, 103.23622
• Craftsman model 103.23100

I'm not sure about the re-engineered 1964, (1965?) 12-1/4" drill press with the Craftsman crown logo; model number 103.23590.