The DB 600 doesn't use " clicker hubs " like most ( only one of my 4 ) it uses an automotive type differential with a lever to lock the differential in , where as the others used a solid axle and to make a turn one wheel freewheels forward faster then the other " click , click , there was a reverse option/standard on some of those also but never had one myself . The 600 has two different hubs one larger then the other both adjustable along the axle with a pinch bolt and keyway to secure them From years of use the smaller hub wouldn't stay on the axle where I clamped it so I tried tighten very tight and you guessed it broke it ,,,
A fellow at work who was a certified welder is going to repair it for me . After checking the axle it's goes from 1.123" in a spot where the hub never rode to 1.117" towards the high use areas . Then the hub's bore is worn going from 1.127" to 1.132 " I'm not sure that even after he welds it the hub will tighten enough so I'm trying to think of options just in case .
I could braze a little on the outer ends of the hub and file so it just slides any where on the shaft ,or drill and tap 2 holes in line of the key which might be the best because it would be putting pressure 90* from the pinch bolt . The only drawback would be three things to loosen when moving the axle to a different position . Any ideas would be appreciated , thanks Al