Collet Problems

[electric]

I am setting up my first large(Backlash) hydro and it has a 1/4" inch drive shaft. I measured the shaft with my calipers and it came out at .248, so it is about would I would expect. My problem is the collet I purchased will not slip over the shaft. It is an Octura collet and it is for this size shaft, but it will not slide over the shaft. I even did a bit a lite grinding on the shaft and the collet, but no luck. Odd.

http://www.offshoreelectrics.com/pro...oct-ocfhe8mm25

Could some recommend a different collet that would be more likely to work. Thanks.

[Megabiker98]

You did loosen the collet right?? Don't wanna make u look bad, just checking!! Lol

[Jason4636]

Best collets you will find.

http://www.rocketcityracing.com/MBP-Collet-Clutch--8-x-63_p_1709.html

[egneg]

I use one from Kintec Racing it's stainless steel.

[electric]

[QUOTE=Megabiker98;491027]You did loosen the collet right?? Don't wanna make u look bad, just checking!! Lol[/QUOTE
LOL, Heck I had the collet off and was driving a punch through it trying to widen the metal tongs out. The best I could do is get it about 1/8 of an inch on. Will try some other collets as suggested by others.

[jeffrey1]

could try centering phillips head driver in center of collet and tapping to make hole bigger,i had to do that for my genesis with proboat collet.just make sure the nut still will fit over it.

[electric]

Best collets you will find.
http://www.rocketcityracing.com/MBP-...63_p_1709.html

Wow, super nice collet. Thanks for the link.

[Jason4636]

I've got them in my big mono. And from what everyone has told me. They swear by them

[b0atnutz3]

Never heard of an Octura 1/4 collet always asked them to make them for the gas boats but they said no. Where did you get a 1/4 collet from Octura???

[Megabiker98]

Never heard of an Octura 1/4 collet always asked them to make them for the gas boats but they said no. Where did you get a 1/4 collet from Octura???

Offshore electrics has them, check the link in the first post

[Gary]

Best collets you will find.
http://www.rocketcityracing.com/MBP-...63_p_1709.html

I just purchased this collet and was impressed with zero runout. But.....It will not stay tight enough on the motor shaft and slips to the point as it is useless , even with lock tite. At about 75mph and 35,000 rpm with a 648 prop she will not hold on .....long before 45000 and 100mph is reached. Makes a bizar noise. I am going to have to put a set screw in it to make it hold. A little disapointed.

[electric]

I just purchased this collet and was impressed with zero runout. But.....It will not stay tight enough on the motor shaft and slips to the point as it is useless , even with lock tite. At about 75mph and 35,000 rpm with a 648 prop she will not hold on .....long before 45000 and 100mph is reached. Makes a bizar noise. I am going to have to put a set screw in it to make it hold. A little disapointed.

I will let you know how my does after I get it. I also ordered a different one just in case so I will have two to work with.

[oscarel]

I will let you know how my does after I get it. I also ordered a different one just in case so I will have two to work with.

So that's where the last one went. I went looking this morning and they show back ordered. :-)

[Gary]

I just purchased this collet and was impressed with zero runout. But.....It will not stay tight enough on the motor shaft and slips to the point as it is useless , even with lock tite. At about 75mph and 35,000 rpm with a 648 prop she will not hold on .....long before 45000 and 100mph is reached. Makes a bizar noise. I am going to have to put a set screw in it to make it hold. A little disapointed.

Ok. I thinkk the collet is ok and holding. The noise seems to be the ESC getting out of sink and making the motor make some strange sounds. I thought it was the collet because when I took it off it had a lot of aluminum shavings inside but it must have come from their machining procces and was never cleaned out

[iridebikes247]

Do you solder the last inch of the flex shaft solid? No collet will get a good grip if you don't coat the whole thing with solder then sand/scuff it up a bit. I have used crappy collets and have had really good luck in the past t hey always came loose without solder. I have aeromarine they grip very well but its a pain to pull the flex out of the collet after use though.