Replacement operator for mystery casement bow window

Question

I need to replace both the left and right operators on a casement bow window without identification markings. The gears on both operators is either stripped or missing. The throw arm length is about 12 inches from the jamb to where it meets the track on the sash bottom.

Emily · Accepted Answer

Hey there!

Thank you for reaching out to us. Your operator reminds me of the 39-013 and 39-014. We determine the length of the arm by measuring from the center of the gear to the center of the roller wheel. You'll want to measure as shown below to confirm if these are the parts you need.

Dimensions for 39-013

Dimensions for 39-014