Dismantling an old machine - stuck bits

Not always easy to be sure from one photo, but the 'fastener' in the second picture looks to me like the end of the shaft with a keyway in it . . .

Farmboy - thanks for the suggestion, but the 'fastener' turns with the shaft and pinion, so the slot can't be a keyway. I was hoping that this was some standard sort of fixing that I'd not come across before myself, but it seems not..

MichaelG - interesting indeed that you would have found it easier to interpret picures the other way up - but why?

Robin

Edited By Robin Graham on 26/05/2018 22:57:11

.

Just an experimental observation, Robin ... the lighting seems to work better [shadows cast more appropriately].

MichaelG.

Robin,

I'm probably way off the mark, not seeing it 'in the flesh', but my impression was that the gear shaft had a keyway which runs right to the end of the shaft and is visible on the 'fastener' in the last photo. The gear is prevented from rotating by a key held in place by one of the grub screws. The other grub screw probably locates in a dimple on the shaft to prevent axial movement. The end of that shaft seems to protrude through the casting with a grease nipple in the end to lubricate the plain bearing hole in the casting. If that was the case, removing the grub screws should allow the shaft to be withdrawn from the handle end . . . with a little persuasion, such as tapping alternately on either end with a suitable soft hammer or drift after application of some penetrating oil.

Apologies if I have misinterpreted the photos

Mike.

.

Agreed

MichaelG.

Mike/Michael - you are right!

Mike - I'm sorry I misunderstood your first reply - your interpretation of my pics was right on the money. I feel foolish now - after having come to the conclusion that the pinion must be keyed to the shaft I should have realised that the keyway has to extend to the end of the shaft - the boss visible at the botton of the above is welded in place, so no way was it coming out in that direction .

It was actually worth pursuing the strip-down this far - the shaft is bored to allow lubricant to pass to both bearings, and it was pretty much caked up.

So another result - thanks!

Robin

Excellent result, Robin ... and it appears that nothing was harmed.

... That makes today a good day

MichaelG.

Nice to see a successful operation perhaps you can give us a picture or two of the finished machine.

David

Yes, definitely a good day

Robin is able to finish the job properly, and my ego got a boost with a from MichaelG

Mike.