My motor shaft is too long.......

[andy watson]

I have just bought one of these motors:

 

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=2046

 

I have bought a prop adaptor for it, but the shaft is aout 3cm long.  This means the adaptor sits on the end looking stupid, and also any vibrations are being magnified.

 

Can I just take a hacksaw to it, or is there a proper way to shorten it?  There do seem to be a couple of grub screws that I unscrewed but didn't seem to loosen anything.  There is also a clip at the back (shown well in the picture) that might have something to doo with something.

 

Thanks in advance.

Should have stuck to IC!

[Doug Ireland]

Might be a bit hard for a hacksaw blade. Have you got a Dremel?

[andy watson]

yep- hacksaw was a generic term for chop the end off.

 

Good swing with an axe should see it clear!

[Biggles' Elder Brother - Moderator]

Yeah, first time I did this I felt the same - its irritating that there are no instructions with electric motors! Leaves us IC guys floundering!

 

What I found - after asking a few folks on here! - was:

 

1. Yes you can cut the shaft - I used a cutting disk in a Dremel rather than a hacksaw - they're quite hard these shafts.

 

2. You can move the shaft. I know it doesn't seem like it but you really can! Take out the grub screws, remove the circlip. Then place the motor on a piece of wood with a hole in the middle - I used an old wooden cotton reel - and give the shaft a healty "tap" with a hide mallet. But because of the need for a circlip groove you can't use this to shorten the shaft protuding at the other end - you can only use it to push the shaft all the way through so you can mount the motor the other way round!

 

BEB

[Biggles' Elder Brother - Moderator]

Doug - we X-posted. Great minds think alike!

 

BEB

[Wingman]

When cutting the shaft remember that the motor is full of very powerful magnets which will collect all the cuttings if you are not careful - I put the motor in a thick plastic bag then push the shaft through the plastic for cutting

[andy watson]

Good point Wingman- I wouldn't have thought of that.

 

And cutting the shaft seems to be the answer.

 

Cheers guys

[Pete B]

I did it in this thread, Andy, and it's still working fine.

 

Pete

[Myron Beaumont]

It's when it's too short that you have a serious problem

[Garry Pollard]

Know the feeling well Myron

Garry

[Myron Beaumont]

Garry

I'm only passing on hearsay Sorry that you have the problem

[Boots]

If you cut it too short then find an old cd or dvd player and take the 3mm shafts out. If your motor is 1/8" or as they say 3.17mm not so easy. Why are 1/8" shaft motors advertised as 3.17mm , for gods sake call a spade a spade its 1/8" ???????

[Garry Pollard]

At 75 not the only problem Myron

Garry

[Myron Beaumont]

Garry

75 what

[Garry Pollard]

Years unfortunatly

Garry

[Myron Beaumont]

Garry

You had me worried for a while --I thought you 'd gone all metric (mms)

[ken anderson.]

back to the topic/title..........i cut mine with a dremel...no prob's......took off enough to make the prop adaptor and spinner etc-fit snug to the cowling......i've also done this to other motor's......turnigy was the last one..... 

 

 

 ken anderson    ne...1.

[Craig Carr]

Posted by ken anderson. on 19/12/2010 09:29:22:

back to the topic/title..........i cut mine with a dremel...no prob's.. 

Andy, the advice is sound but have a word with Enrico..... (The foreign lad)....

 

He has within recent weeks managed to  fine tune a much simpler method of shortening motor shafts in flight........ 

 

 

[andy watson]

Just for the record I clamped it in place (using the bag as described above) and whipped the end off with a hacksaw in no time at all.