johnboy wrote:I've looked at my 63a too. The opposite end of the three-way crimp has a dome with a smaller central flat area compared to the normal front axle, there are no scores or marks on the dome and it looks quite clean. It also has what looks like a small but noticeable step in it (the profile is little like a British tin hat shape!) It might be a red herring, but the other thing I noticed was the fact that the axle is around 2mm longer than the normal front axle, I don't know whether this is common with any of the other models found so far. Would these machines be set by axle length? If they were, perhaps that may be a factor.
Thanks John and Hugh for checking the 63a’s.
John I have seen this tin hat type effect before and will do some checks to see if there is anything in common with the model it is on.
John, I believe the machines would have had a stop or depth of throw set on them for efficiency and consistency. This shows up on some model with more than two axles where the axle ends were done at a different times and we see different finishes on the axle ends on the same model.
I checked two of my 63a with rounded ends and they come in with the following sizes.
Rear axle 24.16mm on two models
Front axle 22.35mm and 23.34mm on two models
The axle is longer to allow for the extra thickness of axle supports on the rear.
I wonder in the case of the three way crimp if machine was set to do front axle the machine would be set for a longer distance of travel and by trying to do the longer rear axle it would engage the axle end sooner before the dome was gripped and in turn create the three way crimp
.
Bert