29-07-2018, 04:03 AM
(This post was last modified: 29-07-2018, 04:09 AM by Bob Culver.)
I am not in the practice of posting pics and it would take me an hour (or afternoon) to figure.
Hopefully someone more familiar can advise but from sketch, under the end cover there is a pressed slinger curved outwards at the outer dia, the bearing, then a washer cum slinger stepped to clear the outer bearing ring. Surrounding and inward of this this a cup shaped piece with hole to clear the shaft. This piece spaces the bearing in the housing and compresses/retains a felt seal.
i cannot recall the commutator end, except beware the key for the gear may not pass through the bearing bush. Odd sized bushes are encountered so prudent not to destroy.
Apart from a generally cooked appearance and flung solder, the comm is often worn thin. If very thin the end copper may fold out and ruin the brushes. And at risk of the obvious may be convenient to use a steady to run the armature true in a lathe. When undercutting, mica should not remain on the walls of the slots.
The armature on 2 pole dyns is wound 1 to 2 to 3 etc to 1 and a digital meter can detect differences in reistance between adjacent segments; often an indicator of connections requiring resoldering.
Where in the world are you at this hour?
Hopefully someone more familiar can advise but from sketch, under the end cover there is a pressed slinger curved outwards at the outer dia, the bearing, then a washer cum slinger stepped to clear the outer bearing ring. Surrounding and inward of this this a cup shaped piece with hole to clear the shaft. This piece spaces the bearing in the housing and compresses/retains a felt seal.
i cannot recall the commutator end, except beware the key for the gear may not pass through the bearing bush. Odd sized bushes are encountered so prudent not to destroy.
Apart from a generally cooked appearance and flung solder, the comm is often worn thin. If very thin the end copper may fold out and ruin the brushes. And at risk of the obvious may be convenient to use a steady to run the armature true in a lathe. When undercutting, mica should not remain on the walls of the slots.
The armature on 2 pole dyns is wound 1 to 2 to 3 etc to 1 and a digital meter can detect differences in reistance between adjacent segments; often an indicator of connections requiring resoldering.
Where in the world are you at this hour?