Catto Prop Bolts

[J5Ron]

I love my Catto prop as previously discussed. Has anyone noticed the extreme tight fit of the prop bolts that come with the prop. One of my flying buddy’s broke one off in the crank.

Anyone else notice this as well?

[CharlieN]

Are they tight in the hole through the prop or is the hole spacing not spot on to the bushing on the flange?

[spinner2]

I've had three Catto props. Two seemed to have holes through the wood core less than perpendicular to the face of the prop. The steel inserts were aligned and spaced properly but because the bolt came through at a bit of an angle they seemed tight. On a few holes I opened the diameter through the wood with a twist drill and that cured things.

[DW]

I've had several Catto props and never had that issue.

[J5Ron]

Are they tight in the hole through the prop or is the hole spacing not spot on to the bushing on the flange?

No they are tight without the prop...we ran one through a 3/8” x 24 die and goes in much better...
had this issue with several different props and sets...

i didn’t think about it until we had to extract one...

[Nodak33]

I’m running into this. How is some one supposed to get a decent torque value. There not even set and I’m worried something is going to get damaged if I wrench harder.

Doesn’t seem right them being that tight.


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[Mark_Moyle]

I’ve had to run a 0.375” reamer through due to the interference fit on the bolts. Then used a dial type torque wrench while applying torque /holding the torque until the wrench quit moving.. right now I don’t recall how many foot pounds... but held the meter on the torque wrench at that specification

[Nodak33]

So I just got off the phone with saber who is the supplier of said bolts and supposedly he hasn’t seen the pitting like what I received on my set.
He also said they might have a bit of sway to em due to heating.
Either way I think I got a bunk set. Look at the face of each one l. Some tapered some not.



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[Nodak33]

Once I sent the pictures he is getting a new set on the way.

Bad luck I suppose, the new prop is so gorgeous, but I’m grounded for now.


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[180Marty]

I wasn't impressed with the bolts. If sway means the head of the bolt makes an orbit when being turned in the threads-----I have one or two that did that.