It is hard for me to envision how that short key can move but I shall heed the warning and follow your advise.billmayo wrote:The Short Key (108) should be bent at one end to fit in the hole on the idler shaft before installing the idler sheave. This prevent the short key from moving as the control sheave slides on the idler shaft. I am seeing headstocks that had a straight short key that ended up binding the control sheave. I have added additional bend to some Short Keys to make sure the short key cannot move once the idler sheave is installed. This binding caused damage to the Control Sheave and the Speed Control Assembly.
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Thank you all for your responses to my questions.