The pieces for this aparatus were made entirely on a South Bend lathe, model 10K, and a Taiwanese drill press, without any milling equipment. The exact date of this effort is forgotten. These pictures were taken on 1 FEB 2007.

The motor itself was taken out of a Spintronix daisy wheel computer terminal. It is the carriage position motor. 4-pole, DC, operating on 48V in the terminal. Originally the motor was fitted with with an encoder wheel and driven by a servo mechanism built with acres of TTL and analog electrics. It is about the size of a softball, and is very powerful, even running on 12V.

The next picture shows the majority of the pieces. There are quite a few bits to this thing. At this point I don't even remember how long it took to make it. I never work with drawings, but some critical dimensions must have been on scratch paper, which is now lost to the ages.

The body was made out of a hunk of 6061-T6 aluminum I probably picked up at the scrap yard. For all I know it was a large round bar when I started. This was turned on the lathe in various holdings, mostly a 4-jar chuck to form the square body. Of course I could have started with a square bar, but I didn't have one. A piece of this material of sufficient length, turn cut into the front and rear housings with a parting tool, and both pieces faced.

Towards the left can be seen the small rotor type oil pump (as is commonly found in a Ford motor, but tiny). It's about 1 inch in diameter. I didn't make that. ;-) Those pieces are the lube pump from a General Motors A-6 air conditioning compressor. Those in the know will remember these old type long cylindrical compressors on GM cars. The rear of the compressor is a cast iron piece that supports the inards, clamps to the body, holds the mounting brackets and refrigerant lines. Well, inside that casting at the end of the compressor drive shaft is this tiny oil pump.

Just to the left of the rotor pieces in the picture can be seen the smaller half of my pump body. Inserted into it is a round cast iron piece in which the rotor spins, and has the pump outlet ports machined into it. This piece is all that remains from that cast iron end of the A-6 compressor. The other 5 lbs. of it has been cut away with a hole saw and then this "housing" machined from it.

At the far left is the pressure outlet fitting, which also serves to lock the cast iron insert in the body. A small roll pin keeps it from rotating.

In the middle of the picture are the pump shaft and bearings. The shaft is cut from 1/4 inch drill rod. The thrust collar in the middle is machined from random steel, is a light shrink fit on the shaft, and further held with a small roll pin. The roll pin hole can be seen in the pic. A flat is cut on one end of the shaft to engage the D-shaped hole in the pump rotor, to drive it. Another very small hole can be seen in the side of the shaft. This feeds oil pressure to the bearing, which can be seen to the left of the shaft.

The rotor side bearing serves also as the inlet port for the pump.

Towards the right side of the picture is the shaft side of the body, the other bearing piece, the drive coupling, and input fitting.

This picture shows the bearing side of the body. The block is bored out to fit the bronze bearings. At the far end the oil seal can be seen. At the top is the inlet hole.

Here is the seal side of the body. An ordinary oil seal of the same type used on the pulley end of a crankshaft. It is a light press fit into the body.

These are the shaft pieces. The small holes in the bearings are to allow oil to pass freely, partially for lubrication and partially to keep the seal at the same (low) pressure as the inlet port.

The ATF inlet hole can be seen in this picture, as well as the roll pin in the shaft thrust disc.

Here the bearings and shaft are assembled into the body. The inlet port in the one bearing piece lines up with the threaded hole on the body. A registration diameter on the inlet fitting locks the bearing. The "1" stamped into the body is a witness mark to ensure the whole thing fits together after the various machining operations.

The inlet ports approximate what I found inside the A-6 compressor. Probably cut with the drill press and a Dremel, but at this point I don't remember. The inlet fitting is in this picture, with its registration diameter that holds the bearing in the proper alignment. At the far left the actual pump parts can be seen, in the other half of the body. Staining from ATF sitting in the pump for years is quite visible.

Here you can see the cast iron piece in the body, with its outlet ports. These are just as they came from GM. Clearly a simple drilling with no consideration given to a smooth flow. The small oil pressure hole can be seen in my shaft, and the small hole in the end of the shaft with which it intersects.

Another shot of the cast iron piece in the body, and the outlet fitting which also serves to hold it in place.

The back side of the outlet half of the pump body. The whole thing is held together with socket head capscrews fitted into counterbores.

Here's the insides ready to go toether. The two halves of the body were sealed with a thin gasket cut from a tablet of graph paper.

The body all assembled. Now you can see the drive shaft and the drive coupler.

The round disc with the counter bore and all the holes is an adapter to mount the pump to the Spintronix motor.

Here the mounting adpater is attached to the pump. The drive couple can be seen inside. The drive coupler is there because I wasn't sure how well centered I could manage to get the shafts between the pump and the motor.

The other half of the coupler is a roll pin on the motor amature shaft. In this motor, the actual armature doesn't have its own shaft. The shaft shaft slips through the bearings in the housing and through a close fitting hole in the armature. This shaft is home made to better suit my application.

And here is the overall unit!