In article >,
says...

>2. The problem is installing a chain sprocket onto a keyed tapered shaft
>which is then secured with a retaining nut. What is the best practice:
>Install on clean and dry taper, install on greased taper, or apply a high
>strength Loctite 272 to the taper before assembly? The idea is to make a
>good assembly but be able to disassemble with no more than a puller without
>heat. Am I correct in assuming that the key is designed for indexing but
>the torque is taken up by the taper? If the taper is greased, removal is
>easy, but the torque might be passed on to the key and cause localized
>stress and failure. Clean and dry I think is the standard way of assembly,
>but Loctite application may be in common practice too.

I would clean the parts and then add a thin layer of grease. Then torque
the bolt to specs. Even with gease, you will need a puller to get the
sprocket off. Because it is a tapered press fit the sprocket will still
move a bit up the taper.
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Alex