New to me Delta DP220

[validius]

I picked this up locally last month and thought i might share my experience.

As i found it: Shotty wiring, an ugly light, and a welded on switch box.



I looked up the serial number. It appears to have been made in 1944.

It seems to be in decent shape otherwise. There is a bit of bearing noise.

 

[onesojourner]

This is definitely made prior to 1994, 1984 and as far as I know 1974. What are your plans for this guy?

 

[validius]

I figured that i would start by tearing into the motor to replace the bearings.






Square starting cap?


I found it like this. Someone has been in here before.


Unfortunately, i forgot that single phase motors have the clutch for disconnecting the staring cap. This poor motor is no more.

 

[validius]

This is definitely made prior to 1994, 1984 and as far as I know 1974.

Whoops, I meant 1944. Thanks for pointing it out.

 

[validius]

I went to the local industrial surplus store and picked up a 3 phase, 3/4hp, 200V (weird, i know) motor.


The old motor had a 1/2" shaft with a flat for a pair of set screws. This new motor is 5/8 with a key. I bored out and broached the pully. The picture is deceiving. There is more meat around the key farther down.


A friend had a spare VFD that worked great save for needing a resistor soldered to the board for reliable cold weather operation.


Testing it on the bench (ignore the hacked up power cords please).

 

[validius]

What are your plans for this guy?

I want something versatile that is suitable for both metal and woodwork. To this end i picked up a slow speed spindle pulley. With the VFD this should give nearly infinite speed control from ~200 to ~3000 RPM and up to ~5000 RPM if i switch to the faster pulley.

I'm going to mount a 3 pos switch on the motor in a similar location to how the original would have been. I want to buy an original switch linkage and hook it up. The switch is configured for ON-OFF-(ON) where the (ON) is momentary. I'm going to wire the momentary function to jog on the VFD. I'm still undecided on where/how to mount the Jbox containing the speed pot and fwd/rev switch.

After the unit is functional i plan on tearing it down and painting it. I'd also like to add a light but i'm not sure how best to do so.

 

[AdrianBoomer]

The VFD will make this a fun tool!

I have a 1941 DP200 that I rebuilt. It has the original pulley guard etc, very fun drill press and I use it every day.

Good luck and post up some nice detailed pics when you get this thing where you want it. Cheers!

 

[txlonghorn1989]

...

I have a 1941 DP200 that I rebuilt. It has the original pulley guard etc, very fun drill press and I use it every day.
...

Pics please.

 

[AdrianBoomer]

since the work on the server I have not been able to upload to my picture album or post pics to the forum in any way. It *****.

 

[exmaxima1]

I'm most impressed that you were able to broach that pulley. I work among a number of machinists, and none of them have the tools to broach a keyway.

 

[driftpin]

If you look on the underside of your table, you may discover a date cast-into the metal. Mine was during the Battle of the Bulge at the end of 1944.

 

[txlonghorn1989]

since the work on the server I have not been able to upload to my picture album or post pics to the forum in any way. It *****.

Try selecting a (one single) pic and uploading that pic before you do the next one. That's what I've had to do to get it work since the server changes.

 

[rannoch]

I figured that i would start by tearing into the motor to replace the bearings.






Square starting cap?


I found it like this. Someone has been in here before.


Unfortunately, i forgot that single phase motors have the clutch for disconnecting the staring cap. This poor motor is no more.

Not that you want to do so but you can fix the clutch and get the motor spinning again...

 

[Hobbyguru1967]

I am restoring one myself. Working on getting a motor and controller to do a DC conversion. Mine is just a benchtop model. I 3D printed some knobs for it the other day. Works good so far.

 

[Jawn]

I'm most impressed that you were able to broach that pulley. I work among a number of machinists, and none of them have the tools to broach a keyway.

That's a useful set of tools to have. I have a set of broaches too, but I lack an arbor press at this point. I have used them by (carefully) using a hydraulic press. Pain in the rear since the hydraulic press travel is only about 5-6 inches but the broaches are longer than that.

 

[validius]

I'm most impressed that you were able to broach that pulley. I work among a number of machinists, and none of them have the tools to broach a keyway.

I cant take full credit. I'm fortunate to work somewhere that has a well stocked machine shop and is permissive enough to allow me access after hours.

 

[validius]

Not that you want to do so but you can fix the clutch and get the motor spinning again...

How would i do that? I pushed the armature out the wrong side broke the pieces that held it in place.

While i wouldn't reinstall it on this press, i would like to have the motor around for future projects. It's a nice looking little motor.

 

[validius]

I took it apart and replaced all the bearings. The spindle bearings i bought from hammerscale.com (highly recommended). The pully bearing i fabricated by cutting the original one apart then turning down the inner race so i could press it into an off the shelf bearing.

The rest of the machine i cleaned up thoroughly & wiped down with way oil. I think it turned out well.

I'm still interested in any information on fixing the original motor. It's a nice motor that i'm sure i'll have use for in the future.

 

[exmaxima1]

.

I'm still interested in any information on fixing the original motor. It's a nice motor that i'm sure i'll have use for in the future.

That Craftsman motor is very common, and routinely runs $10-40. You should be able to find one (any model) and cannibalize the switch. I'm not a big fan of open frame motors on machine tools though (especially ones with obsolete flat-pack capacitors), but maybe it would be ok in an enclosed cabinet for a jointer or similar...

 

[validius]

That Craftsman motor is very common, and routinely runs $10-40. You should be able to find one (any model) and cannibalize the switch. I'm not a big fan of open frame motors on machine tools though (especially ones with obsolete flat-pack capacitors), but maybe it would be ok in an enclosed cabinet for a jointer or similar...

Can replacement capacitors be obtained?

 

[exmaxima1]

Can replacement capacitors be obtained?

I never looked, but I assume you could make up an array of smaller caps to get the capacitance required in the available space. Any idea what the original capacitance was?

 

[validius]

I never looked, but I assume you could make up an array of smaller caps to get the capacitance required in the available space. Any idea what the original capacitance was?

No clue. I imagine there is likely a table of standard values out there somewhere though.