your 39-187/188 match my old cranks exactly accept that the bottom arm is 5 inches on yours and my originals are 4.5 inches from the pivot point to the end where it clips to the windows.
will these still work? is that extra .5 of an inch going to keep the window from closing?
I do not see any offerings for a smaller arm.
added a photo to show mine is 4.5 inches your replacement shows5 inches.
can you tell me if this is a problem and do you sell anything this size?
Unfortunately we don't have this operator style with a 4-1/2" length link arm, but this problem is not uncommon. You have a few options. First, you can simply install the new operators and see if they work anyways (depending on the window, they might). Second, you can try moving the bracket the new operators connect to on the sash to see if that makes up the difference. Third, you can swap the link arms out. This can be done by drilling the arms off the old and new operator, then installing the old arm on the new operator using our 62-014 rivet.
