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Sterba Propeller Toque?

I have a 20+ year old Sterba prop on my Q-200 that I torque to 18 ft.lbs.. Your milage may vary, but that value has worked for me for many years.

Hope that helps.
 
On my Sonerai, with a 52/42 Ed Sterba prop, I use the 5/16-24 hardware with AN363-516 nuts. I torque to 12ft/lb.
 
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Prop me up....

Zazoos said:
Ready to torque the prop, but not sure how much.

The bolt diameter is 7/16.

Found the following but not sure my answer is in there:
http://www.greatplainsas.com/edinstall.html

Thank you,
Click to expand...

Trent,
I had a Sterba on my RV4 and owned Kenny’s Sonerai previously. The bolt size denotes the torque value and the 7/16” bolts on the 0-320 should be 19-23 ft lbs. Here is a wood prop torque value chart.

https://propellerman.com/assets/Recommended_bolt_torques_for_Sensenich_Wood_Propellers.pdf

I didn’t like how my 3/8” bolts became “loose”in less than 25 hours so I drilled my prop to 1/2”, installed the larger bolts and crush plate from Saber MFG and bumped the torque to 25 ft lbs. They would hold torque until a 50hr oil change afterward. Additionally every year during the CI I would refinish it with spray Spar Varnish from Lowe’s. Ed makes a great prop for a very reasonable price, keep an eye out for cracks along the grain, delamination and keep it properly torqued and varnished. It will serve you well.

http://www.sabermfg.com/bolts.htm

Eventually I sold the Sterba on my RV4 in lieu of installing a composite test prop from a little known (at that time) prop maker named Craig Catto.

The rest as they say is history....:)

V/R
Smokey
 
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