BaneBots 42mm Motor Conversion.
Here you will find a tutorial page on how to change the stock 42mm BaneBot Gear Motor to the larger 774 motor.
It will take you through the basic steps as well as show you pictures of the process, I hope it is helpful.
First you start with the stock
BaneBot 42mm gear motor which comes equipped with a 550 motor.
In some applications you will need the larger 775
motor which will give you increased power.
To use this motor you also need to buy the corresponding
pinion gear and
mounting plate.
Once you have cleared yourself a little area to work grab a Phillips screw driver and take out the 4 screws that hold the gearbox to the motor plate. Be careful not to strip out the screws!
Select the appropriate sized screw driver and apply constant and firm pressure to the screws while turning. Also, dont loose them! I put some tape on the end of the holes so they wont slide out vanish.
When you get it all taken apart it should look just like this. I would advise to do this work on a paper towel so that is stays clean, but I seemed to be out of them at the time. Save the large washer and make
sure the gears dont fall out and roll away. Also, try not to take the grease off the parts unless you have more to replace it and take note of the spacing on the pinion gear, you will have to duplicate this on the new motor.
Now that you have the unit taken apart it is time to get the new motor ready to be mounted. The first step in this is to mount the new pinion gear. The fit on this gear to the 775 motor shafts is extremely tight; some say that you
should silver solder this pinion on, but in this case I believe that a press fit is sufficient. To do this you need the use of an arbor press or vise DO NOT use a hammer or a pair of pliers. Keeping correct alignment is very important so you do not bend the shaft.
Once you have the access to your pressing device; a vise in my case align the 2 parts up very carefully and begin to compress the jaws very slowly while always checking to see if the alignment is still correct. Once you have compressed the shaft to the end of the
gear you will have to stop at this point if you are using a vise.
Once you have completed the step above your motor and pinion gear should look like this. I placed the two motors side by side to show you all something that you should be aware of. When pressed to the end of the motor shaft the pinion
protrudes too far and will be too long to fit onto the gearbox. This means that the pinion will have to be pressed onto the shaft further and then the shaft will have to be cut.
So now that you know your shaft needs to be cut you will have to press your pinion gear even further down the shaft so that you will have the correct height which will allow the motor to mount correctly to the gearbox once the shaft has been cut.
To do this with a vise you will need a small socket or tube that will support the pinion yet have a large enough hole in the center for the shaft to pass through. Once you have found a tool that will allow this to happen put the motor with the attached pinion into
the vise and align it with the socket. Again, be sure to check for the proper alignment. Improper alignment at this point can still bend your motor shaft turning it and the pinion into junk. If you have done everything correctly your motor should now look like the picture above.
Now it is time to cut the shaft, but first you need to tape up all the openings on the motor so that metal chips do not get drawn inside the motor by the magnets. Painters tape works best for this because once you pull it off it will not leave a sticky residue like
duct or electrical tape will. When you have it all taped it off pick your tool of choice and cut the shaft off flush with the pinion. You can use a hack saw, dremil, grinder, sander ECT. I used a hack saw to cut off the majority of the shaft and then used a belt sander to finish it up.
When you are finished getting the shaft flush with the pinion grab the 775 motor mount and use the 2 supplied screws to attach it. It is very important to use lock tight here, be generous when applying it and then tightly snug down the screws.
Then take the newly mounted motor and the gearbox that you had set aside and begin to reassemble them. Again, use a generous amount of lock tight here; you dont want your gearbox to come apart while you are in the middle of a match. Snug the screws
first then come back around and give them a good twist to make sure they are nice and tight. Be careful not to strip out the screws during this step.
If you have done everything correctly this is where you get to hook up a battery to the new motor to test out the gearbox! This is not a difficult modification that requires only basic tools that most people have.
If you like the size of the stock 42mm gearbox but want a little more power the 775 motor swap might be a good option for you!
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