How to Extend a Tween Span with Actionscript

Hello!

I'm animating a record player arm in my movie. It's rotating from a fixed registration point and will rotate 45 degrees from the start position on a record to the end position in the middle area. I'm able to create the animation tween successfully, however, the duration of the tween covers the length of an audio clip of 62 mins and 5 secs. That's a lot of frames (~89000+) and Animate won't publish over 16000.

Is there a way use a couple keyframes and some actions to slowly rotate the record player arm over the above amount of time?

Thanks for any help!