Catto Prop Bolts
- Thread starter J5Ron
- Start date
spinner2
MEMBER
Montana
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.
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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...
Mark_Moyle
SPONSOR
Platinum
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
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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TxAgfisher
MEMBER
East Texas
Does anyone know the actual size? I have a request out to Catto as I experienced this same issue. It cost me a prop flange bushing which was quite pricey.
Catto has not responded and I am looking to see what I can replace them with.
Catto has not responded and I am looking to see what I can replace them with.
TurboBeaver
Registered User
Northern Maine
They are tight in the holes thru hub for sure, Marks idea of simply running a reamer thru before installing is going to be the best cure. Otherwise you will fight it every trip, oiling the bolt shaft, can actually make it worse. So ream em and ride. ��
Steve Pierce
BENEFACTOR
Graham, TX
Last I knew Saber was Catto's vender for the bolts. https://www.sabermfg.com/bolts
Just spoke to Nicole. We were trying to figure out who you are vice a forum name. Can you call her at two zero nine-7 five 4-3 five five 3?
CubCruiser
SPONSOR
Ormond Beach, Florida
Yep, my first call would have been to Nicole. The customer service at Catto has been great for me and Nicole has helped several times with questions/concerns.
Daryl
Daryl
TxAgfisher
MEMBER
East Texas
Called 3 times today and couldn't get anyone on the phone
My experience with saber’s bolts:
saber heat treats them but doesn’t do a really good job straightening them after. You need to spend a few minutes checking and straightening them prior to installing.
Chuck them up in a drill press or lathe and slowly spin the bolt. Roll them on a flat table works too. If it wobbles a bit it will bind in the prop hub and give erroneous torque readings.
Mark the “high side” of the bolt then put a nut on it to protect threads, lay it horizontally in a hyd press.
Lean on it a bit, may take a few tries, they are like spring steel.
goes pretty quick once you figure it out how much pressure it takes.
if there’s interference with threads when threading into hub (without prop) and you’ve confirmed the inserts are in good shape, probably a bad batch of bolts. DO NOT run a die on them, the threads should be rolled not cut with die.
die cut threads form sharp “v” notch, a stress point prone to fracture over time.
saber heat treats them but doesn’t do a really good job straightening them after. You need to spend a few minutes checking and straightening them prior to installing.
Chuck them up in a drill press or lathe and slowly spin the bolt. Roll them on a flat table works too. If it wobbles a bit it will bind in the prop hub and give erroneous torque readings.
Mark the “high side” of the bolt then put a nut on it to protect threads, lay it horizontally in a hyd press.
Lean on it a bit, may take a few tries, they are like spring steel.
goes pretty quick once you figure it out how much pressure it takes.
if there’s interference with threads when threading into hub (without prop) and you’ve confirmed the inserts are in good shape, probably a bad batch of bolts. DO NOT run a die on them, the threads should be rolled not cut with die.
die cut threads form sharp “v” notch, a stress point prone to fracture over time.
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