Model Boat Mayhem

Mess Deck: General Section => Chit-Chat => Topic started by: F4TCT on May 15, 2014, 09:03:35 am

Title: Couplings
Post by: F4TCT on May 15, 2014, 09:03:35 am

Hi all,


On with the FTX tug and i need a solution. What comes with the FTX running gear is rubber safety couplings which I dont want to use.


I was wondering if anyone knows of any online suppliers who can sort me out with an M8 threaded coupling going onto an 8mm motor shaft?


I may resort to a pully or chain drive if I cannot get the angles right.


Dan


(http://s4.postimg.org/5wtqhfuwt/SAM_3185_4000x3000.jpg)

Title: Re: Couplings
Post by: RMH on May 15, 2014, 09:29:24 am

Hi

I bought some large couplings from prop shop. The motor has an 8mm shaft and the prop shaft end would easily accomodate an 8mm thread.

Title: Re: Couplings
Post by: F4TCT on May 15, 2014, 09:45:31 am

Oh excellent  :-))


Have fired off an email to prop shop to see what they can recommend.


Thanks


Dan

Title: Re: Couplings
Post by: Neil on May 15, 2014, 10:15:40 am

Quote from: F4TCT on May 15, 2014, 09:45:31 am

Oh excellent  :-))


Have fired off an email to prop shop to see what they can recommend.


Thanks


Dan

knowing you for your exuberance and requirements for a quick reply Dan.........give the guy a chance to reply.....might take a few days or even a week, as he is a one man band and usually very busy. neil.

Title: Re: Couplings
Post by: F4TCT on May 15, 2014, 10:22:32 am

Lol


he aint Kim Maclean so he can take aslong as he wants..  :}


Dan

Title: Re: Couplings
Post by: Martin (Admin) on May 15, 2014, 10:51:38 am

How deep are your pockets?

http://www.huco.com/   -   http://www.huco.com/couplingselector.asp

    "World Leading Manufacturers of Small Precision Couplings
    Makers of the World's Only Step-Controllable Air Motor
    UK's Number one source for Power Transmission Components"

Title: Re: Couplings
Post by: malcolmfrary on May 15, 2014, 11:35:14 am

Some interesting looking stuff on here - http://www.motionco.co.uk/ - haven't done any shopping there yet.

Title: Re: Couplings
Post by: a3nige on May 15, 2014, 12:26:30 pm

Got some toothed belts, pulleys, shafts and bearing blocks from motionco and they were very good, fast delivery and quality.
Nige :-))

Title: Re: Couplings
Post by: F4TCT on May 15, 2014, 12:34:48 pm

Problem is Nige that i would need one of the pullys to be M8 threaded - which is suppose is doable myself if I bore it out to 7mm and then tap it.

Title: Re: Couplings
Post by: derekwarner on May 15, 2014, 12:50:16 pm

Guys.....ISO M8 x 1.25P = a tapping drill size of 6.80.....not 7.0  %).....Derek
 

Title: Re: Couplings
Post by: tugboyben on May 15, 2014, 01:32:08 pm

Hi Dan
Great project  :-))

Can you not use longer prop shafts that way the motor goes deeper in the hull you will get the couplings to line up just an idea
Then direct drive is possible


Jason

Title: Re: Couplings
Post by: F4TCT on May 15, 2014, 02:42:18 pm

I may have found the solution!


The running gear comes with the flexy coupling, however it also comes with a brass collet type of thing in which should allow just looking at the rough diameter, a normal say robbe coupling to be used.


Will have a bash at it later on

Title: Re: Couplings
Post by: Stavros on May 15, 2014, 04:54:34 pm

Give Steve model boat bits a ring he will sort you one out and cheap as chips as well


Stav

Title: Re: Couplings
Post by: F4TCT on May 16, 2014, 08:36:09 am

Sadly no further forward.


having measured the little fittings, its still 8.5mm diameter I need to contend with.

Title: Re: Couplings
Post by: slug on May 16, 2014, 06:19:15 pm

shg do belt drives etc...at brians on sat .....tony

Title: Re: Couplings
Post by: Stavros on May 16, 2014, 08:24:47 pm

As I sadi give Mark a ring tell him what the dia on your motro shaft is and also your propshaft size is and he will MAKE you some
 
 
Dave

Title: Re: Couplings
Post by: Umi_Ryuzuki on May 17, 2014, 12:42:25 am

Raboesch Models has some interesting couplings.

It seems you buy a coupling, and can fit a splined connector into either end.
And if needed, a double ended spline could be fit between two universal couplings for
some extended alignments.

http://www.raboeschmodels.com/index.php/nl/component/virtuemart/marine-accessories/couplings