connect handle to 39-147 operator spline

A quick learner says:
How does the handle connect to the operator spline shaft? Is it a press fit? If it is a press fit (without a set screw or pin to hold the handle in place), if the handle requires replacement (loosens), is a new handle required (or the best option)?
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Donna from SWISCO responded:
Our 39-286 handle actually has a set screw for attachment.

I would start by replacing the handle. If the new handle is still loose then you may need to replace the whole operator, since that means that the splines on the operator may be worn.
A quick learner says:
I'm assuming from your answer that the handle is a press fit, and therefore removing and replacing the handle is going to cause wear. Is this assumption correct?
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Tom from SWISCO responded:
No, the 39-286 is not press fit. You would place the handle over the operator spline and then tighten it with a set screw. However, a set screw can only do so much to secure the handle if the operator spline is worn down.
A quick learner says:
Do you have any handles that are a press fit, i.e without a set-screw?
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Dave Sr. from SWISCO responded:
Not for Andersen hardware, no. As far as I know, Truth is the only company that uses pressure fit casement operator cranks. Are you sure you have an Andersen operator?
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