I'm not a master anything, just a hermit who works in his basement.
401-475-7030, if you call, your number better be listed, I don't answer Private calls. Only one person complained so far, He said, I like my privacy, My reply, NO PROBLEM< Don't call.
15 Edward street
N.Providence R.I.
If I ever want to call you ,I will have to send you a pm with a date and time. I call a friend quite regularly and most times our number comes up as an unknown number from Canada or from Virginia.
Back to the op, the advantage of doing your own from rod is you can make it suite.
For me, I like my own setup, but for customers who like a traditional ferrule, I try to leave as much diameter as I can near the shoulder of the shaft and thread only the front half.
On a 5/16 thread I bore them out to 0.280 right to the end.
Then on the shaft tenon, it gets threaded like others do,and the front of the tenon is made to 0.276 (.004 diameter is for glue )
But threads can be metric or anything you like. The advantage of a threaded on ferrule, is to allow other processors to take place while the glue is setting.You do not need as much thread engagement as you might think to keep it all together and make it work.It is more important to get the air out and have all the volume filled.
Some choose to continue working the ferrule to size while others prefer to set it aside while it sets.
With non threaded tenons, usually you need a clamp to keep it together or leave it setup overnight with tailstock or some other device for pressure.
The way the ferrules screw onto the shaft, when a shock loading is applied to the ferrule and the shear strength of the glue being used is not as strong as the load being applied, the ferrule actually moves away from the threads and has the effect of making it loose.By the way,this is the theory behind impact wrenches loosening tight bolts.It is also why they use special sockets.Off topic but I thought appropriate.
Neil
