A New Project - Early Delta Drill Press Power Feed

[Rick_Br]

This power feed came to me with a Delta 17" drill press



I believe this was introduced in the early 1940's and was replaced with a newer design in the late 1950's. This is driven from the motor - which is double shafted - and has a pulley on the lower shaft which is the power source for the power feed. The unit has a unique motor, pinion and depth stop. Here is a link to the early Delta brochure

http://vintagemachinery.org/pubs/1141/12602.pdf

I plan on using this as a fill in project so updates may be sporadic. So far I have gotten the rear drive section disassembled



The only questions at this point relate to a bearing - Anew departure 3202 which is open both sides. That bearing is available or I could use a standard 6202 with seals. I believe this bearing is in an oil bath so maybe open both sides is appropriate and I could just clean up the original and use it?

just below that bearing is an oil seal which I pretty much destroyed trying to get it out. It is marked 500006? I think - not sure about the 6 or what may come after it if anything. It seems to have an 1.125" OD and a .360" thickness. The ID is hard to determine due to my heavy hand but it fits on a .656" shaft. This Timken Seal seems close - Timken P/N 481528. The width/thickness is off by an 1/8" but I'm not sure that is a concern. The OEM version is 23/64" and the pocket it sits in is 1/2". What do you think - will this work?


Here is the parts schematic - the b earing and oil seal are on the lower right hand side of the schematic



I thought maybe this project would be of some interest

Rick

 

[Rick_Br]

I am continuing to plug away at the disassembly of the front drive. As I got to the last screw (10-32 SHCS) I discovered the socket was rounded over. I have never been successful with extractors and this screw did not change my luck. I buggered it up pretty good.



So I was thinking last night about the socket head cap screw situation - the good screw looks like this



The screw, as expected, is holding two pieces together - you can barely see the line separating the two pieces but it is there



I realized that the bottom piece had a counterbore and a clearance hole and the top piece had the threads. I concluded that if I could drill out the head the bottom piece (with the clearance hole) would slide off leaving a good piece of the threaded section exposed so I could grab it.

I didn't want to use a drill because of the point configuration so I used a center cutting end mill in the bridgeport



I figured the counterbore was not extremely critical so I lined it up by eye and started milling. Worked like a charm. I used the good screw and inverted as a depth gauge. I got very close and was then able to pry the bottom piece off pretty easily. This left the threaded section exposed



Then I was able to simply turn the remaining threaded section out.
Now the front drive section is completely disassembled



and the 4 main castings are at the sand blaster. Next step is to determine what, if anything, I am missing. I'm pretty sure there is a cover plate missing, some gaskets, a fiber washer, the pinion thumb screw and a broken spring.

Big question is can I get this all back together

Rick

 

[Nutria]

Anew departure 3202 which is open both sides. That bearing is available or I could use a standard 6202 with seals. I believe this bearing is in an oil bath so maybe open both sides is appropriate and I could just clean up the original and use it?

New Departure made good bearings. Personally, I'd clean and reuse it, particularly given that it is open, in an oil bath, and probably working at low revs.

Super neat project.

 

[alfadan]

I'd think that oil seal ID is a nominal 5/8 to stretch over a .656 shaft.

 

[alfadan]

Found that shaft diameter in my National catalogue .pdf.

 

[Rick_Br]

Thanks for the responses - I decided to reuse the open bearing and buy te Timen oil seal I referenced above.

More to come
Rick

 

[Rick_Br]

 

[Nutria]

You are speedy!

 

[Rick_Br]

You are speedy!

In all fairness - that is only the rear drive and the motor was already done a month or so ago. There is one front drive casting there. I pay someone to do blasting - sometimes it takes a week or so but this time it was next day.
Rick

 

[Rick_Br]

I spent a little time on assembly of the rear drive section - got the belt guard components assembled and the belt guard hinged to the rear drive casting.



Next up is the worm and worm gear assembly for the rear drive - not expecting this to go easy

Rick

 

[Rick_Br]

So I have been away from this project for about 6 weeks. I'm trying to fit it in among other things/projects. I received the new oil seal and got it installed. As recommended by "William I decided to use the original open on two sides bearing on the worm shaft assembly. I started to assemble the worm shaft and worm gear shaft -the two major sub assemblies of the rear drive.





I discovered I was missing a hard felt washer See Discussion. I'm going to order thar from McMaster.

I am also missing two gaskets - see schematic below



I have one of them but it is torn - it measures .020" thick. This is not a high pressure oil reservoir - mainly a means of lubricating the worm and worm gear. I am thinking about just using a permatex type of gasket maker - any thoughts about that? I'm not sure if the solid .020" gasket also is important to the worm and worm gear placement.

Rick

 

[Hoorn]

Fantastic project, when you're done can you post as many pictures as possible on the Delta thread.