Working on custom alu masthead crane. Sheave is Harken 712. Harken says sheave should be "clamped" in place, so that the side plates of the sheave do not spin relative to the fixture in which the sheave is mounted. Question is how to best to do this. One thought is to use a bolt for the pin, and just squish the side of the fixture together slightly. Danger there is that the fixture will not distort evenly, so that the side balls will not be loaded evenly as they rotate. Could also put in set screws that will reach through the side of the fixture and engage the sheave side plate.
Anybody do this before or have a clever idea? The fit of the sheave in the fixture is ok, but not snug enough to "clamp" the sideplates in place.
Vincent DePillisMember Since 19 Jan 2005
Offline Last Active Nov 24 2016 02:45 PM
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