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The ring fetter is made up of 3 pieces. The outer cylinder, inner cylinder and the locking bolts. As you draw in on the locking bolts (usually caps screws) the inner and outer cylinders are squashed together locking the shaft to the bearing. To remove there are jacking bolt holes. The ring fetter is a one shot deal. the cylinders are distorted and win not seat properly again.

Bob Page

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Q: How does a ring fetter shaft coupling work?
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