What is the recommended torque for tightening the hub carriage bolts when assembling a new wooden wheel for a 22 Model T?
Turn them until just before they break. I have to confess I don't remember a number, but I do know a couple of things. You may know them too, but I'll mention them for those who might not. 1 Don't reuse the old nuts and bolts. 2 Get the new ones from RV Anderson (better than original).
Model T was way before torque specs. You just use the appropriate length wrench. These hub bolts are coarse thread. A 10" socket wrench will snug tight the hub bolt nuts. Don't overdo it. The outer flange is thin, and can be warped or bent around the carriage bolt heads. And you crack or stress the wood spokes.
More important to keep the nuts on, peel or mushroom over the bolt ends, or stake the nuts to the bolt ends to prevent the nut from getting loose. Very important on the rear wheels in the brake drum, lots of load there with the rear wheel drive and stopping.
Some folks in the past have mentioned spot welding the nuts to keep them from loosening, DON'T do it. While they won't loosen, they can't be snugged up again if needed, which they very well may need at a later date. Dave