Door Pivot Hinge Heavy Duty Hidden Bookcase Hinges Secret Door Hinges 360 Degree

 Excellent pivot set option when door weight stress on traditional door frame butt hinges is a concernEnables a doorway that pivots from a point on the floor under the doors center instead of from hinges on the side of a door frameAllows for alternative to a traditional door whether function, design, door weight, space or style are the issueWeight: 455g each, For door weights of up to 250 lbs; the floor bears the full weight of the door rather than door hingeDimension: Top Part 130mm*25MM/5.12"1"Bottom Part 105mm25MM/4.12"*1", Hole Size: 6mm/0.23"(as the picture shows)Product features:1. The function is similar to the upper and lower shafts of the ground spring. The heavy-duty shafts are installed at the bottom and top of the door leaf, and play an important role in the opening and closing of the door leaf;2. The maximum opening angle is 90.The main technical parameters:1. The acid salt spray test is performed for 24 hours, and the surface corrosion resistance level reaches the 10-level standard;2. Applicable door thickness: 3260mm, hidden recess 5mm thick, maximum door height dimension 18002800mm, maximum door width 1500mm;3. Maximum load-bearing: 120KG.Product material: SUS304 stainless steelSurface treatment: sand lightproduct advantages:1. The bearing under the rotating shaft adopts steel ball contact, which can be opened and closed freely and silently, and the screw adjustment is convenient for installation and maintenance;2. When the door is closed, the hinge cannot be seen inside or outside, which keeps the door leaf beautiful. Installation method and scope of application:1. Open hidden recesses at the bottom and top of the installed door leaf, and use self-tapping screws to fix the shaft on the door leaf;2. The upper and lower components of the product have different structures and need to be installed separately;3. Use the hexagonal key to adjust the upper shaft screw so t