OICU812
04-03-2007, 11:08 PM
Well a few including recently myself have had some bad luck with Actro motors. I was chasing a vibration in my heli that I finally found..
In short it appears there are several Actro motors that have been released that have no bearing retainer on both the bearings outer race nor the inner race to the motor shaft. The outcome for me and a few others was the shaft basically eating itself away at the bottom bearing due to spinning inside the inner race of the bearing. Worse part is that Actro is impossible to get ahold of as they do not have an email you can contact them by, nor do any vendors have the replacement shafts or bearings. It gets worse,,,, goto get the bearings and see how hard they are to find,,, at an oddball size of 6mm ID x 16mm OD x 5mm width you will have fun. I located some finally through Boca Bearings, they were the only ones I could find that have this size. The shaft well,,,,, I will likely have one made as I can not seem to find anyone who sells them.
My particular motor is the 24-4 Actro, I have now heard of this on a few others and in different sizes. If it is not caught it could result in major damage to the model due to this creating a lockout, the shaft breaking etc,,,,
The fix is to simply take yours apart as it is real easy. Use a 5mm punch at the top after removing the 4mm bolt and gently punch it out the bottom from top, you do not have to remove the bottom c-clip, pinion etc. Then simply apply your bearing retainer product such as 609, let set and you should be fine.
Here are some pics of mine and how fast and bad it got chewed up before I noticed this. If Actro would only take a few minutes in assembly and 10 cents and apply a good reatiner this would be avoided. I wish I knew how to contact these guys to tell them to smarten up!!! :bomb:
You may find yours are fine. I would rather post this and save someone else from having a major wreakage though, just in case!! :mrgreen:
In short it appears there are several Actro motors that have been released that have no bearing retainer on both the bearings outer race nor the inner race to the motor shaft. The outcome for me and a few others was the shaft basically eating itself away at the bottom bearing due to spinning inside the inner race of the bearing. Worse part is that Actro is impossible to get ahold of as they do not have an email you can contact them by, nor do any vendors have the replacement shafts or bearings. It gets worse,,,, goto get the bearings and see how hard they are to find,,, at an oddball size of 6mm ID x 16mm OD x 5mm width you will have fun. I located some finally through Boca Bearings, they were the only ones I could find that have this size. The shaft well,,,,, I will likely have one made as I can not seem to find anyone who sells them.
My particular motor is the 24-4 Actro, I have now heard of this on a few others and in different sizes. If it is not caught it could result in major damage to the model due to this creating a lockout, the shaft breaking etc,,,,
The fix is to simply take yours apart as it is real easy. Use a 5mm punch at the top after removing the 4mm bolt and gently punch it out the bottom from top, you do not have to remove the bottom c-clip, pinion etc. Then simply apply your bearing retainer product such as 609, let set and you should be fine.
Here are some pics of mine and how fast and bad it got chewed up before I noticed this. If Actro would only take a few minutes in assembly and 10 cents and apply a good reatiner this would be avoided. I wish I knew how to contact these guys to tell them to smarten up!!! :bomb:
You may find yours are fine. I would rather post this and save someone else from having a major wreakage though, just in case!! :mrgreen: