Drill Powered Peristaltic Pump, Gear Oil Transfer Pump

Pumping gear oil by hand is frustrating, use this instead!

Chose a quality “engineering” material for best results. I used a Saturn 3 resin printer with Siraya Tech Blu Tough, in Easy Grey.

Some tolerances are relatively tight, I highly recommend calibrating your printer/resin choice for shrinkage/dimensional accuracy before starting this project. Check out this link if you've never done it before:

https://www.printables.com/model/230621-shrinkage-and-exposure-calibration-piece-for-resin

BOM:

Hardware:

4x: ¼ 20 x ¾ in hex bolts

4x: ¼ 20 hex nuts

4x: ¼ flat washers (optional)

1x: ¼ 20 x 1 ½ hex bolt

4x: 608 bearings (22mm O.D. x 8mm I.D. x 7mm Thick)

1x: ¼ I.D. 3/8 O.D. Silicone Tubing, 4+ft long

Printed Parts:

1x: Bearing Spacer

1x: Drive Rotor

1x: Case Bottom

1x: Case Top

2x: Roller Bushing

1x: Driven Rotor

Assembly:

*I used sockets and a drill press as a makeshift arbor press to fit the bearings, they shouldn't be too crazy tight, so use what works for you, vice, real arbor press if you're fancy, clamps if you aren't, hammer if you're a barbarian…

Press fits should be pressed until snug, no need to break anything…

1: Press fit 1x 608 bearing into the center of both Case pieces and one into each Roller Bushing.

2: Press fit 1x ¼ 20 x 1 ½ hex bolt into the Drive Rotor so that the shaft sticks out on the flat side.

3: Fit the bearings that were installed in the Roller Bushings onto the Drive Rotor.

4: Press the hex section of the Driven Rotor onto the Drive Rotor, making sure the bearings of the Roller Bushings stay on the short shafts on both rotors.

5: Press the ends of both Rotor halves together to make sure the shafts are seated all the way into the bearings.

6: Insert the Bearing Spacer into the bearing in one of the Case halves.

7: In the other case half, press the shaft on the Driven Rotor into the bearing of the Case.

8: Work the Silicone Tubing between the Roller Bushings and the case, then install the other case, may have to spin the Rotor assembly by hand back and forth to prevent pinching of the Tubing, be patient here.

9: Install the remaining bolts/nuts.