Hi Larry, my name is ***** ***** minutes recording time on any recorder is too long. The file gets too big, and it could eventually wear out your recorder. What I recommend is stopping the recording at the 30 minute mark, then start a new recording. As a sound engineer who has done thousands of recordings, even on a computer, I know there are limitations to every machine, even a computer which times out at about the 1 hour mark.
When you put a label on the disc, it makes it heavier than the machine is intended. The motor that spins the disc is only intended to spin a disc.
It's my experience that says don't record over a half hour. Newer machines are getting better, but it's good practice to make 30 minute tracks. It does vary from machine to machine, but as a safeguard, plan on 30 minute tracks. There isn't a spec in the world that will tell you this, it's based off of real world experience. If it's stopping at 45 minutes, you have found the limits of the machine. That's why I practice the 30 minute track rule. What if something important is not recorded because the machine failed at the wrong time? You won't have that problem with the 30 minute rule.
Discs can hold up to 80 minutes of audio, IF it is a good brand, and certain conditions don't exist. Click here to read more. Therefore, I would record 2 30 minute tracks per disc. That will leave room for finalization so you can read the discs on another player.
Let me know if you run into any issues.