What's the usual way of fixing and quartering drivers on large scale jobs in the UK? The usual practice over here is to use keyways for quartering and fixing drivers but I'd rather not use keys on this locomotive. I'm considering either a press or Loctite, then drill and tap the back of the hub for a threaded cross-pin. Something else I plan to do, that I've not seen done before, is to make the main crankpins adjustable by giving them tapered shanks in matching bores. The locomotive (a Tich x 2) will have Walschearts valve gear and I plan to square the ends of the main crankpins and broach the return cranks to fit, thus some means of exactly locating the squared end (and the return crank) must be found. In plan to do this by boring the driven wheels a 6 degree taper in the crankpin bore. The crankpins are then turned to a 6 degr taper on their shanks and a tapped hole is added to the ends. The taper will allow the crankpins to be adjusted and then pulled tight with the draw-nut/screw on the back of the wheel, and, as Mr. Hardy says to Mr. Laurel "... no one will be the wiser." Regards, Harry Wade Nashville Tennessee MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.