Jammed Motor Pulley on shaft of Myford Super 7

[Michael GilliganParticipant @michaelgilligan61133]

Posted by CotswoldsPhil on 07/09/2014 19:08:21:

… Did the pulley design change over time? as you all seem to be talking about only one grub screw being present.

CotswoldsPhil

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Yes, Phil … I think it must have changed

It seems there might be scope for some further improvement.

MichaelG.

[Chris TriceParticipant @christrice43267]

In my Myford instruction book for the Super 7, although it’s a young machine, paragraph p on fitting the motor states, “.. line up the motor to it (the countershaft pulley) and lock the grub screwS which secure the motor pulley”.

[Michael GilliganParticipant @michaelgilligan61133]

The current Myford part is certainly illustrated with two tapped holes.

MichaelG.

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Edit: Perhaps significant … according to lathes.co.uk the material was changed from Aluminium to Cast Iron.

Note: My ML7-R has both of the "primary" pulleys in Aluminium.

Edited By Michael Gilligan on 07/09/2014 22:05:03

[Chris TriceParticipant @christrice43267]

Mine is cast iron with a single grub screw. My previous older machine pulley was aluminium but I don’t recall how many grub screws. I’m pretty sure the grub screw in the current one is smaller than the one that appears to have been used on the pulley this thread is about.

[Michael GilliganParticipant @michaelgilligan61133]

Adam,

Returning to your original post, about making a puller for pulley removal

I still don't know how many variants there are, but: I've just been cleaning-up my [single grubscrew] Aluminium pulley, and realised that the recess in the face is machined with an angled undercut … I wonder if there was a special puller that fit this?

MichaelG.

[Adam HarrisParticipant @adamharris13683]

Hi Michael, I am pressing ahead with my horse shoe but unfortunately I only have 13mm thick plate (!) so it is now a trip to toolstation to get a pack of thin cutting discs….

[Gordon WParticipant @gordonw]

I would drill and tap two holes in the end face of the pulley while it is off. This can then be used with 2 bolts and a bit of bar the next time it needs to be off.

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