How do you connect the Flex shaft collet to the engine?

[EdwardHaines]

Hi,

I’m partway through building my first Outrigger (first boat) I’m stuck on how the flex shaft Collet is attached to the engine. I have noted that the Uni joint for a straight shaft is screwed onto the crankshaft. But the flex shaft Collet that I was sent has no thread in it at all.

Do I need to thread the Collet the same as the Uni joint system or is there another way of securing the Collet to the crankshaft?

Any assistance would be appreciated.

Kind regards

Ted Haines

 

[Tim_Duggan]

Hi,I’m partway through building my first Outrigger (first boat) I’m stuck on how the flex shaft Collet is attached to the engine. I have noted that the Uni joint for a straight shaft is screwed onto the crankshaft. But the flex shaft Collet that I was sent has no thread in it at all.

Do I need to thread the Collet the same as the Uni joint system or is there another way of securing the Collet to the crankshaft?

Any assistance would be appreciated.

Kind regards

Ted Haines

Welcome to IW Ted!

To answer your question - The collet should be a threaded type, to screw onto the crankshaft. I'd say the one you were sent is for an electric motor.

What sort of engine is it that you have? Do you know the thread type on the crank?

 

[EdwardHaines]

Hi,I’m partway through building my first Outrigger (first boat) I’m stuck on how the flex shaft Collet is attached to the engine. I have noted that the Uni joint for a straight shaft is screwed onto the crankshaft. But the flex shaft Collet that I was sent has no thread in it at all.

Do I need to thread the Collet the same as the Uni joint system or is there another way of securing the Collet to the crankshaft?

Any assistance would be appreciated.

Kind regards

Ted Haines

Welcome to IW Ted!

To answer your question - The collet should be a threaded type, to screw onto the crankshaft. I'd say the one you were sent is for an electric motor.

What sort of engine is it that you have? Do you know the thread type on the crank?

Tim,

Thanks for the info. I picked up an OS .21 engine with a tuned pipe in an old mono hull off eBay the other day. After reading your reply I ran a couple of dia’s over the crankshaft thread, the dia that run cleanly up and down the thread was a NF28 ¼”.

I suppose I had better order a collet for an .21 IC Engine, any suggestions were I should try?

Regards Ted

 

[camaroboy383]

Get your self a octura collet.you can get them from

Gary pruesse, g&m models

16302792451

Or bob cormier, evolution hobbies

I beleive john otto, technology hobbies carries octura also

18136896777

You can call gary or john or contact bob through here his user ID is his name.

Remember you will also need to have the size of the shaft when ordering.

Should be either .187 or .150

Good luck,and welcome to intlwaters

Alden

 

[Tim_Duggan]

Ted,

Yeah most 21's use 1/4"-28.

Ozspec hobbies, Hobby Supplies, Excell Products - they all should have them and do mail order.

 

[EdwardHaines]

Ted,Yeah most 21's use 1/4"-28.

Ozspec hobbies, Hobby Supplies, Excell Products - they all should have them and do mail order.

Thanks Tim, I will get on to them stright away.

Regards

Ted Haines

 

[EdwardHaines]

Get your self a octura collet.you can get them from
Gary pruesse, g&m models

16302792451

Or bob cormier, evolution hobbies

I beleive john otto, technology hobbies carries octura also

18136896777

You can call gary or john or contact bob through here his user ID is his name.

Remember you will also need to have the size of the shaft when ordering.

Should be either .187 or .150

Good luck,and welcome to intlwaters

Alden

Thanks Alden,

If I'm unable to get any here downunder I will try your surggestions.

Regards

Ted Haines