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question about retrofitting soft close undermount slides.1/17
so ive been asked to retrofit a kitchens worth of drawers. its a kraftmaid kitchen, I don't know how old but the drawers are sliding terrible, they are undermount but no soft close, just self close. grass, old style dynapro. I cant find a number on them. anyway, they are sized ( clearance wise) for the 1/2" or 5/8" slide. meaning, the box is 5/8" less than the opening. but these drawers are all made from 11/16" stock. ive checked it many times. so my question is, do I go with 5/8" slide and worry that the drawer will rub being that its a bit too thick or bump up to the 3/4" slide and then have to alter the clearance which would mean packing out the slides. I cant understand why a drawer is 11/16", especially from a mega company like kraftmaid. I have none in stock currently and the job is pretty far away to be running back n forth to check both styles.
I have seen Kraftmaid use undermount slides for 3/4" stock quite a bit.
Side clearance is irrelevant on undermounts. The critical number is the opening width - the interior width of the drawer ÷ 2. I don't have the spec. sheets in front of me, so you will have to do the conversion, but...
If it is 21mm, it is a 16mm (5/8") slide.
If it is 24mm, it is a 19mm (3/4") slide.
I hope this helps.
Could the customer be talked into new drawer boxes? If not, I would just pack out the new slides. I use Blum tandems (563H), and a properly sized box has approximately 3/16" clearance on either side. Using this hardware, the slides would need packed out an additional 1/4" overall. If this is a face frame cab, you should be able to just add a 1/8" spacer at the face frame. If you use an adjustable rear mount bracket, you'll have the play needed. As noted above, I would double check the inside drawer box dimension, as that will effect the actual packing needed. You may need the 563F slide.
Have you talked to your Grass rep? They might have a solution, and their new slides aren't bad at all.
If you're really in a pickle and the thick drawer sides are pinching the slides, just use a plunge router on the underside to relieve the 1/16 you need on each interior edge.