Metal drill (GB/T3211-1987)
Metal drills are tools which can be used to drill holes through metal surfaces. As metal is a more robust material than wood, it demands more specialized tools for drilling. Metal drill (GB/T3211-1987) is a certification standard of metal drill tools in China.
Metal drill (GB/T3211-1987) sets out the mandatory requirements for metal drills, including the materials, shape, size, mechanical properties, etc. The standard is designed to make sure the metal drill tools are of high quality, so that they can meet the needs of cutting through metal surfaces with ease and reliability.
The standard requires metal drills to be made of high grade steel. It specifies that a metal drill should contain the relative percentages of elements like 0.3-0.15% of carbon, 0.19-0.38% of silicon, 0.4-0.7% of manganese, 0.6-1.05% of chromium. The materials used should also possess adequate strength and hardness.
The shape of the metal drill should be circular with a uniform shape. This is to ensure a smooth process when drilling, so there is no risk of damaging the metal surface due to excessive force. The size of the metal drills should also be in line with the size of the holes to be made. It is important that the drill is of the correct size so that there is the least amount of force applied when the operation takes place.
In terms of the mechanical properties of the metal drill, the standard requires the drills to possess certain properties that would enable them to be used reliably and effectively. The standard states that, when tested by the pressure test fixture specified in GB/T 3418-92, the aluminum alloy of a metal drilling should withstand and withstand a certain amount of interference.
In addition, the test should also contain the stages of stress, fatigue, and valid cycle. The aforementioned standard also requires that the metal drills be subjected to a bending test and impact test. The test should be in accordance with the specific requirements of the standard.
Metal drill (GB/T3211-1987) is a certification standard for metal drills in China. This standard ensures the quality and efficiency of metal drills, providing a reliable and safe way to drill through metal surfaces. It is an important tool for ensuring accurate and efficient drilling operations in China and abroad.
