Prop bore diameter !

[Speedfreek]

Jay already told you no The hub would be to thin I don't suggest it at all what prop anyway ?

Thanks , X57

[Speedfreek]

Using a 1/4 drive dog is a brilliant idea.
This puts all the stress on the outer diameter, and is not transferred through the step down.
I can't say for sure, but I'm willing to bet that the step down has a square corners at the step, which will lead to stress concentrations.
Going with the 1/4 drive dog eliminates all of that. That would be a much more robust setup.

Exactly, thanks.

[Speedfreek]

After all the advice from very experienced people, those who have tried and also from dasboata, the prop guru, it's not advisable to do it. . . then perhaps he needs to find out for himself and go ahead and do it. . .Maybe he will be successful and we can all learn something new!. . .It's like telling a driver not to go through a red light as you might get caught and get a ticket . . .even worse get into an accident. So the driver does it a couple of times and gets away with it, finally on the third time he goes through the red light he gets hit by another car. . .the results are devastating, not just a ticket but perhaps lives lost. I apologize for the very harsh analogy but same principle.. .take the advice and save yourself the trouble. I too have tried it with no success as I ruined the prop before I could even put it on and break it during use. ..

Thanks ,but I needed to here it from a prop guy

[srislash]

Using a 1/4 drive dog is a brilliant idea.
This puts all the stress on the outer diameter, and is not transferred through the step down.
I can't say for sure, but I'm willing to bet that the step down has a square corners at the step, which will lead to stress concentrations.
Going with the 1/4 drive dog eliminates all of that. That would be a much more robust setup.

I’ve been running like this for a number of years. I have not broke a shaft. I have run cut down 457’s on this setup and mangled a couple props due to debris in the water. No broken shafts.

[dasboata]

Thanks ,but I needed to here it from a prop guy

Hey I have a ABC 1/4" shaft 3 blade very similar specs if your interested

[Speedfreek]

I’ve been running like this for a number of years. I have not broke a shaft. I have run cut down 457’s on this setup and mangled a couple props due to debris in the water. No broken shafts.

Sweet

[Speedfreek]

Hey I have a ABC 1/4" shaft 3 blade very similar specs if your interested

Not a real fan of 3 blades , I have a Mystic 138 so would need a set of CR .....
Do you have em in a two blade CR 1/4 ?

[dasboata]

Not a real fan of 3 blades , I have a Mystic 138 so would need a set of CR .....

Ok I like 2 blades on cats anyway !!!

[Speedfreek]

Ok I like 2 blades on cats anyway !!!

What can you recommend in a two blade in a 1/4 Shaft ABC, and a little more aggressive then a Octura X57 ?
Need CR too !

[dasboata]

What can you recommend in a two blade in a 1/4 Shaft ABC, and a little more aggressive then a Octura X57 ?
Need CR too !

Ask your prop guy ????

[dasboata]

[QUOTE=Speedfreek;733986]What can you recommend in a two blade in a 1/4 Shaft ABC, and a little more aggressive then a Octura X57 ?
Need CR too !
[/Q 2214 2215 ish

[Speedfreek]

[QUOTE=dasboata;733996]

What can you recommend in a two blade in a 1/4 Shaft ABC, and a little more aggressive then a Octura X57 ?
Need CR too !
[/Q 2214 2215 ish

I don't know the specs on ABC props I don't have a chart on them my ESC was Luke warm with a X57 108 mph !

[Speedfreek]

If you just have to use 1/4” cable, get one with a steped-down stub shaft. I would NOT drill out a prop, especially for high rpm SAW-type running.

https://www.offshoreelectrics.com/pr...?prod=ose-1290


.

Here is the problem with the OSE shaft for me, mine is 5 1/2 inch before the flex OSE one is 4 inch.
It will not work with my drives

Mine , my bearings are at about 2 and 5 and it's 8mm thick shaft.
1553852644590653879627.jpg

OSE , 3/16 to 1/4
ose-1290_shaft.jpg