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Delta Homecraft 11-120 11" Drill Press Restoration & Re-wire

Thursday, January 26, 2017
For the last month I've been looking for a drill press and band saw on Craigslist to add to my shop.

When I saw this little beaut it just felt right.  I e-mailed the guy to see if he could budge on the price and I got it for $50.

I honestly didn't know much about drill presses a few weeks ago because I had only used one a handful of times.  I was hoping it would be larger than what it looked to be in the pictures and I was glad to see that it was a good size - and it's a heavy little bugger (I can barely tilt it up from laying down)!

I didn't test it before I bought it because the wiring was cr-aaa-zy!  Seriously, someone just wired an old lamp cord to this thing and wrapped a bunch of electrical tape around the exposed wire ends.  I honestly don't get it.

I'm not going to do an in-depth post about how I re-stored my press because I mostly want to focus on how you can add a switch and a grounded wire (posted here).

But first - BEFORE and AFTER pictures of this machine!

Here's a little bit of the process:

 I first tried to take the surface rust off with WD-40 and a wire brush/steel wool.  It worked OK.  I was also having a hard time getting the chuck off but eventually got it off + was able to take it apart to clean all the internal parts.  Everywhere I read people said to use an arbor press.  I got so flustered with this chuck after it froze up that I took a large hammer over a block of hard wood on the jaws and it popped out so easy, I was surprised.

I cleaned it really well and added new grease to the threads and popped everything back together.

 My table full of parts and tools after the demo.

I was surprised to see what bad shape my hands were in  - YIKES!

 Steel wool and wire brushes just weren't cutting it and I didn't want to use my expensive Evapo-rust so I soaked the rust parts in Vinegar for 12+ hours.

 The rust scrubbed off so easy!

Even though the rust was coming off pretty nicely with the Vinegar I didn't like:
-waiting for hours and hours
-still had to scrub
-didn't help with discoloration/spots
-I had to wash the parts in water to neutralize the acid from the vinegar... then had to stress about drying really well to avoid more rust (also would wipe with WD-40 as an extra precaution)

Basically, I hate soaking parts in ANY solution because it's never good enough, it's messy and time intensive.

Here's my solution.  A beast of a bench grinder.  When I say beast, I mean it.  I wish it was a little less powerful to be honest - the wheels spin FAST and your hands get really cold from the air moving so quickly.  I replaced the stone wheels with a .10 diameter (fine) wire wheel I got from McMaster and a .14 (Coarse) DeWalt wire wheel I got on Amazon.

 Within seconds you can see the difference!

Here's the size difference of my new 8" grinder compared to the 6" grinder we've had for a few years.  Umm.... they don't even compare.  The 6" halts to a stop if you press anything against the wheel and the 8" will eat your hand off.

I should tell you that I had a cupped wire brush on my drill before I caved in and bought my bench grinder and the cupped brush worked wonders for the flat tables!

 Primed and painted.

Clear coated and ready to cure.

I assembled the drill press as I wiped each of the bare metal parts with WD-40 and put grease where needed.

The motor was the very last and most painful thing to work on.
I so badly wish I had a picture of the inside of the motor before I cleaned it out.  It was PACKED full of saw dust.  I can't imagine how it all got in there!

Documenting how the wires attached to be able to put it back together right.

I tagged the wires to help with assembly.

This is where the wires attach to the outside of the motor - also where the original plug attached.

I lightly sanded the armature with a fine-grit sand paper.

 Motor housing cleaned and ready for primer!

 Primer and a little bit of paint.  I love the hammered paint!

Here's the motor parts ready to be assembled.

The main thing I wanted to do with the motor was to bring it up to "code" which meant the stranded wire needed to have terminal ends and not wrapped around a screw.

 I don't like the pre-insulated terminals because they look super bulky and awkward to work with in tight spaces.  I had to special order these non-insulated terminals from McMaster and they're the perfect size for my wires and stud diameter.

 I cut off the old ends.

 Stripped 1/4" of the wire coating away, slid a 1/2" piece of heat shrink tubbing onto the wire before the terminal.

 Crimped the terminal tight onto the wire.

Shrunk tubing over terminal/wire ends with lighter.

 I added all the washers back how they were originally.

 Attached the inside wires to the inside...

 ...and outside wires to the outside.

 Getting the motor housing back together and the wires tucked out of the way was much harder than I expected.  It was such a relief to get the motor bolted to the machine and being so close to seeing the machine finally run.

Because who wouldn't take a selfie with a drill press!?

As always, the manual for download.

Here's some teasers for what you'll see in the next post (how-to add a switch and grounded wire to a shop tool motor):

2 comments on "Delta Homecraft 11-120 11" Drill Press Restoration & Re-wire"
  1. Hey Dani, amazing job on the old press! Wow, you really cleaned it up beautifully. Found this page while trying to learn how to lube my dad's old press which was part of a Rockwell multi-tool (table saw, jointer, drill press combo). You may not be aware that that little loop in the casting aft of the left side of the nut that retains the axle (spindle?) of the raise/lower arm is a keeper for handily storing the chuck key. I'll email you a photo of where it goes. Mike

    1. Oh my heavens!! I looked at the pictures to see what you were talking about and I didn't really give it any thought. That's awesome - right now its tethered to the press with a metal wire and is awkward to use. Thank you for the tip! :)


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