1.Ball Bearing Hinge
A, 80% usage for fire rated door.
B, Different material: SS201,304,316, Steel.
C, Different size: 4.5”*4”*3.4mm
4.5”*4.5”*3.4mm
D, Different location: CECO,Amweld,Republic, Curries. E, Popular in US standard doors.
F, UL certification.
2.Spring Hinge
A, 15% usage for fire rated door.
B, Different material: SS201,304,316, Steel.
C, Different size: 4.5”*4”*3.4mm
4.5”*4.5”*3.4mm
D, Different location: CECO, Amweld,Republic, Curries.
E, Sometimes can instead of Closer.
F, UL certification.
G, Single door not total use Spring Hinges
3. Floor Spring (Floor Closer)
A, Use for double action door.
B, Installation on the top and bottom.
E, Must be have 15mm gap between door and frame.
F, Can not fire rated.
4. Others.
A, Flag Ball Bearing Hinge. B, Conceal Hinge. C, Unequal Hinge.
