I just found out my 7518 Collet is interchangeable with my PC690.
I did purchase two 7518’s back in the day but have yet to set them up , but I did however discover that I misplaced one of the 1/2” collets somehow.
Trying to source one and found this on amazon.ca
https://www.amazon.ca/PORTER-CABLE-42950-Router-Collet-2-Inch/dp/B00004TRA3?th=1
I did purchase two 7518’s back in the day but have yet to set them up , but I did however discover that I misplaced one of the 1/2” collets somehow.
Trying to source one and found this on amazon.ca
https://www.amazon.ca/PORTER-CABLE-42950-Router-Collet-2-Inch/dp/B00004TRA3?th=1