17lb window springs needed

It's tough to tell from these photos. Would it be possible to see a clear picture of the pivot shoe itself? That will tell me for sure what you need. Thank you!

Thank you! That looks like our 15-177 shoe, which is designed to be used with the Series 152 spring. Your old cover isn't made anymore, but you can reuse it as long as it's in good condition.

Yes, that part that screws in is the cover. If it can't be reused, let me know and I can try to find something else that will work for you.

As for making a cutout, we recommend doing so at the top of the track. The general rule for the bottom sash is that you don't want the shoe to accidentally fall out of the cutout during the window's normal operation, so the top of the track is usually the safest place.

Since your cover isn't made anymore, you'll have to use a somewhat more modern replacement. See our 15-143 bushing, 15-144 bushing cap, and 15-145 support barrel. These three pieces sort of "sandwich" over the spring and keep it stable in the track. in that sense, they really do work more like a cartridge than a cover, but the effect is the same.

As for sash weight to spring stamp, you want to divide the weight of the window between how many coil springs support it in total. So if you only have 1 spring per side, then you want to divide the sash weight by 2. Note that this rule of thumb is only applicable for coil balances; if you have any other type of window balance in your house, then you don't want to follow that rule.

We did carry your vent latch at one time, but it was recently discontinued. Our hope is that it will be made available to us again in the near future, but at this point I don't know when that will be, should that day ever even come. I am very sorry for the inconvenience. Please understand that this was a very recent development so we don't have any known substitutes at this time.

The tilt latch is another matter. We definitely have this. Just eyeballing your measurements, I'd say our 26-120 and 26-121 look close, but I recommend checking our dimensions to confirm. 

Finally, we don't have an illustration on those balance covers. A tutorial video is definitely a possibility in the future, but due to the quarantine our ability to film is limited. I'll definitely recommend it to our video team once things return to normal.

Sounds good! I'd love to hear how it worked out. Thank you very much for your business, of course, and I hope you have a great new year!

I'm sorry to hear that you're having trouble. The coil spring does need to be screwed into the 15-177, yes. There's a little hole on the side of the shoe where you can put the screw. Something like our 33-072 will do it, or anything of the same size you have laying around.

Sure, I actually just had a customer earlier this morning who was looking for the same hardware. I'll use one of the photos they submitted to me, since it shows how the spring attaches to the shoe fairly well.

I'm not sure I understand that question. These are typically installed in the window track below the tilt latch, or at least the position the tilt latch would take when the window is fully closed. If it's any higher than that, then the tilt latch will interfere with the spring and it wouldn't extend properly.

Ohhhhh, I understand now. Thank you so much for clarifying. You don't have to worry about that, it doesn't really matter which side of the pivot shoe your spring is on in my experience.