A marble right-angle ruler is a measuring tool, commonly referred to as a square, and sometimes called a try square. It is used to check the perpendicularity of workpieces and the perpendicularity of their relative positions, and is also sometimes used for marking lines.

Marble right-angle rulers are measuring tools, commonly referred to as angle gauges, and sometimes called miter squares. They are used to check the perpendicularity of workpieces and the perpendicularity of their relative positions, and are also sometimes used for marking lines. Marble right-angle rulers are suitable for perpendicularity measurements. They adhere to the flatness precision standard GB6092-85 and the perpendicularity standard GB6092-85. Weight reduction holes have been added to reduce weight and facilitate processing. The side tolerance is 0.02.

Marble right-angle rulers are primarily used for measuring the flatness, perpendicularity, and straightness of workpieces. The main mineral composition of marble right-angle rulers includes dolomite, plagioclase, a small amount of olivine, biotite, and trace amounts of magnetite, with a black coloration and a dense, intricate structure. Having undergone billions of years of aging, they possess uniform texture, excellent stability, high strength, and hardness, maintaining high precision under heavy loads. Suitable for measurement work in industrial production and laboratories.

Marble right-angle ruler features:

1. After long-term aging, the rock has a uniform tissue structure, a low linear expansion coefficient, stress relief, and does not deform, thus ensuring high precision.

2. High rigidity, high hardness, and excellent wear resistance.

3. Resistant to acidic and alkaline substances erosion, non-corrosive, no need for oiling, dust-resistant, easy to maintain and care for, with a long service life.

4. No scratches will occur,不受constant temperature conditions, and it can maintain temperature measurement accuracy at room temperature.

5. Non-magnetizable, smooth movement during measurement with no sticking sensation, unaffected by humidity, and the flat surface is well-calibrated.

When using a marble right-angle ruler, it is not only important to consider the shape and position of the item being inspected, but also to note the following:

1. Grade 00 90° marble right-angled rulers are commonly used as a benchmark for verification tools in measurement sections.

2. 90-degree marble right-angle rulers in Grade 0 and 1 are commonly used for inspecting precision parts and adjusting instruments by inspectors.

3. Wide-base right-angle rulers are commonly used for on-site inspection of general parts.

4. When the surface to be inspected is curved, a 90° marble right-angle ruler with a flat measuring surface should be used for inspection.

5. When the inspected surface is flat, a cylindrical protractor or a knife-edge straight edge with a 90° angle should be used for inspection.

Marble right-angle rulers are prone to rust if not stored properly: No need to oil them during use. If not in use for a long time, apply a thin layer of general industrial oil gently when storing to prevent accuracy issues and ensure normal operation.