Depending on the aspect of their application, their cross-sectional shapes can vary. Generally speaking there are four main cross-sectional shapes of fixed window profiles: flat, round, unequal polygon and equal polygon. Among them, the plane type is commonly used in door frames, wall corner lines, etc.; round profiles are mainly used for aluminum alloy pipes; unequal polygons and equal polygons are commonly used for window frames, partitions, etc.

4. Door profile
. If the roller is worn out, it will need to be replaced. Purchase a new roller that matches the size and type of the old roller. Install the new roller by sliding it into the door and securing it with screws.
. There are also options with integrated locks, offering both style and security.
Wrought iron has a much lower carbon content (usually less than .08%), but it contains small amounts (1 to 2%) of slag, the byproduct of iron ore smelting consisting of silicon, sulfur, phosphorus, and aluminum oxides). The lower mixture of carbon makes the metal more malleable and ductile. As the material is heated, reheated, and hammered into shape the slag is worked out of the iron and the material grows progressively stronger and more fibrous in composition. Wrought iron will often undergo at least about a half dozen cycles of heating and working.
Furthermore, heavy duty sliding door rollers come in a variety of designs to suit different types of sliding doors. Whether you have a patio door, wardrobe door, or industrial sliding door, there are rollers available to meet your specific needs. From adjustable rollers for precise door alignment to corrosion-resistant rollers for outdoor applications, there is a wide range of options to choose from.