OCTURA Expensive Collet w brass insert Questions

[high-tech]

I can't seem to get this collet to release my flex cable, I bought an extra brass insert and tried it and still messes my cable up every time.

Is there some kind of magic or tricks or...

I love specific and good info. I'm dumb as a box of rocks and can't read between the lines or guess what someone left out. I'm sorry If I ramble but I'm frustrated. I've gone through 3 cables and the next one is gonna get the whole thing bounced off the wall and away we go...

[martin]

Most that I know use 2 piece collet couplings because of the problems you get with the 3 piece brass insert type not releasing, personally I hate them.

[properchopper]

Had the same frustration with the 3-piece collet. The Octure two-piece has served me well but eventually gets tight. I've tried these and so far I like them a bunch : http://www.offshoreelectrics.com/pro...prod=ose-81518

A good idea to eliminate "false tights" and provide smooth torque-feedback while tightening is to put some anti-seize (auto parts store) on the threads (threads only)

[high-tech]

Thanks for the feedback guys, I cooled off a little and found a way... Spin the nut off and grab the insert with needle nose and give it a little side to side motion and out it comes. seems like a lot to cope with but it works so far

[martin]

As properchopper points out I also always use Permatex Anti seize lube on the threads on 2 piece couplings, as he says you don't suddenly reach that metal to metal tight spot when tightening the nut. They also undo much better with anti seize on the threads.

[grsboats]

Horracing has good ones but personally MBP are my favorites...no way to use other than that.Gill

[martin]

MBP run nice & true compared with most other couplings that can be a bit hit or miss.

[high-tech]

What is MBP? I finally figured out how to get my pic on my post

[martin]

MBP are couplings made in Germany & sold in the US from Rocket City Racing, their quite expensive at around $33 but are probably the best couplings around. They run so true it puts other couplings to shame (at SAW rpm over 50,000rpm it makes a big difference to vibrations where they run so true), they don't use grub screws tightening onto a flat on the motor shaft which pushes other couplings to one side.

[properchopper]

What is MBP? I finally figured out how to get my pic on my post

Sprechen Sie Deutsch ? : http://mbp-rc.de/

[TheShaughnessy]

I want to add my name to the list of frustrated three piece couplers users. A second hand Pursuit I picked up came with one and it was always difficult to get the shaft loose. At the moment I can't get the brass insert loose at all. I haven't had a problem with the two piece designs, but I'm not spinning 40,000 + rpm.

[drwayne]

needle nose pliers were the only way i could separate the brass from coupler..

[785boats]

I just put a small flat blade screwdriver in the slot pointing down along the flex shaft & give the handle a little tap with a pair of pliers, a small hammer, or a 9/16" spanner. What ever comes to hand. It always pops right out.

Then remove collet & replace with a real one.

There are two types of these 3 piece collets that I've come across. The 'Aeromarine' which has the grub screw entering on the point of the hex section, & 'some other' brand that has the grub screw entering on the flat part of the hex section.
The Aeromarine type are easy to remove without hitting. Just put a small screw driver blade in the slot & lightly twist as if doing up a screw. The guys with them at our club do that & the brass bit pops out. I don't have any of that type.
It's the 'other' type that I have, & needs the persuasive little TAP.

[properchopper]

It might just be possible [Speculation Alert : Ignore if you choose] that the three-piece design requires less tightening torque to get a good grip. If it gets cranked on with as much muscle as a two piece design it get stuck. That being said I decline to test this hypothesis as I have already fulfilled my quota of driveshaft/props to the lake bottom.

[longballlumber]

It might just be possible [Speculation Alert : Ignore if you choose] that the three-piece design requires less tightening torque to get a good grip. If it gets cranked on with as much muscle as a two piece design it get stuck. That being said I decline to test this hypothesis as I have already fulfilled my quota of driveshaft/props to the lake bottom.

I believe this response has some merit! I too agree that each design requires MUCH different wrench torque to be effective.

Later
Mike