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Step 5Motor and Drive Shaft
1. Use progressively larger drill bits to drill out the pilot hole in the motor drive shaft so that it is enlarged to 1/8 inch diamater (see photo). Use care to assure the larger hole is still well centered in the motor drive shaft
2. Solder the motor connector wires, see photo to make sure you get the polarity right.
3. Measure and record the inside depth of the cylinder, add 1/8 inch to this dimension, and cut the 1/8 steel rod to that length.
4. On one end of the drive shaft, about 1/4 inch from the end, begin building up the diamter using heat shrink tubing until it's just a little less than the motor shaft dia. The final piece of heat shrink tubing should be longer so that it extends all the way to the end of the shaft. It should fit tightly on the motor shaft. This creates a flexible coupling between the motor and the 1/8 inch drive shaft.
Important -So that the drive shaft can be easily removed from the motor, only heat the top portion of the heat srink tube to bond it the the drive shaft, but not to the motor's shaft.
5. On the other end of the drive shaft, file or grind a nice bullet nose - this is just to make it easier to fit the shaft into the bushing (that is the bushing that is attached to inside closed end of the glass cylinder, see step #6) during final assembly.
6. Next take the 3-48 threaded rod and bend it into a U-shape. The span between the legs should match the two small mounting holes in the motor and the length of the straight portion of each leg should be about 1 3/4 inches. You want the legs somewhat long so that you can lower the motor the make final assemble easier.
7. Thread two nuts up towards the top of the U-bolt, and install the U-bolt thru the holes in the base plate. Then mount the motor to the base plate bottom and secure with two more nuts.
2. Solder the motor connector wires, see photo to make sure you get the polarity right.
3. Measure and record the inside depth of the cylinder, add 1/8 inch to this dimension, and cut the 1/8 steel rod to that length.
4. On one end of the drive shaft, about 1/4 inch from the end, begin building up the diamter using heat shrink tubing until it's just a little less than the motor shaft dia. The final piece of heat shrink tubing should be longer so that it extends all the way to the end of the shaft. It should fit tightly on the motor shaft. This creates a flexible coupling between the motor and the 1/8 inch drive shaft.
Important -So that the drive shaft can be easily removed from the motor, only heat the top portion of the heat srink tube to bond it the the drive shaft, but not to the motor's shaft.
5. On the other end of the drive shaft, file or grind a nice bullet nose - this is just to make it easier to fit the shaft into the bushing (that is the bushing that is attached to inside closed end of the glass cylinder, see step #6) during final assembly.
6. Next take the 3-48 threaded rod and bend it into a U-shape. The span between the legs should match the two small mounting holes in the motor and the length of the straight portion of each leg should be about 1 3/4 inches. You want the legs somewhat long so that you can lower the motor the make final assemble easier.
7. Thread two nuts up towards the top of the U-bolt, and install the U-bolt thru the holes in the base plate. Then mount the motor to the base plate bottom and secure with two more nuts.
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