Improved roll-out trays for cabinets are shown and described. In one embodiment, a quick assembly roll-out tray system is shown and described. Inventions of the disclosure may include a corner bracket for a roll-out tray. Front corner brackets and rear corner brackets may be included. A drawer assembly is considered with the scope of the disclosure. A method and kit for a roll-out tray are disclosed.

A ball bearing slide includes: two outer slides, an inner slide located in the outer slides, two ball cages, and ball rows rollably arranged in the ball cages and supported between the inner slide and the outer slides; wherein the inner slide includes two end parts and a connecting part connecting the two end parts; the ball rows are located between the end parts and the outer slides; the outer slides drive the ball rows to rotate in a pull-out direction and a push-in direction; wherein each of the end parts of the inner slide has a free end; the free end of at least one of the end parts projects towards a centerline of the certain ball row to form a stopping part. During operation, the stopping part prevents the ball rows from falling off from the inner slide under excessive force.

A ball bearing slide (100) includes: at least one outer slide (1), an inner slide (2) located within the outer slide, a ball cage (4) located between the inner slide and the outer slide, and three rows of balls (3) rollably arranged in the ball cage; wherein the three rows of the balls (3) includes a first ball row (31), a second ball row (32), and a third ball row (33) located between the first and second ball rows in a vertical direction; wherein the inner slide includes a first curved part (24) against the first ball row, a second curved part (25) against the second ball row, and a third curved part (26) against the third ball row; the third curved part is located between the first ball row and the second ball row in the vertical direction, and is symmetrically arranged relative to a symmetry axis of a line connecting centers of the first ball row and the second ball row. With the first, second and third curved parts, internal space of the ball bearing slide for containing the inner slide is increased, which rationalizes the ball cage arrangement and optimizes the ball bearing slide design.

A slide rail assembly includes at least two slide rails. One of the two slide rails includes a pair of walls and a middle wall connected between the pair of walls. The middle wall of the slide rail is arranged with a predetermined part bent relative to the middle wall, and the predetermined part is formed with a ball groove.

A ball bearing slide includes: at least one outer slide, an inner slide located within the outer slide, a ball cage located between the inner slide and the outer slide, and three rows of balls rollably arranged in the ball cage; wherein the three rows of the balls includes a first ball row, a second ball row, and a third ball row located between the first and second ball rows in a vertical direction; wherein the inner slide includes a first curved part against the first ball row, a second curved part against the second ball row, and a third curved part against the third ball row. With the first, second and third curved parts, internal space of the ball bearing slide for containing the inner slide is increased, which rationalizes the ball cage arrangement and optimizes the ball bearing slide design.