Nodular cast iron well cover is applied in the infrastructure construction of daily life, which has a very critical use value. It is because of its sense of merit that it is deeply favored by everyone. Here is a simple description for you.
1、 There is no epoxy resin in its own composition, otherwise the hole will be greasy when drilling; the thickness and dimensional tolerance are specified。 Uneven surface will cause damage to drilling。
2、 The heat transfer coefficient is large, which can quickly take away the heat generated during drilling and reduce the temperature of twist drill;
3、 Strength requirements. A certain surface strength can avoid rough edge on the surface of the hole, but too hard will damage the twist drill;
3d捕鱼4、 It should have a certain rigidity to avoid the plate shaking when lifting the drill, and it should also have a certain ductility. When the twist drill comes down, it will immediately deform at the moment of contact, so that the twist drill can accurately point to the part to be drilled, and ensure the accuracy of the drilling part.
Warm reminder: Although the nodular cast iron well cover has the characteristics of the top, but in the application, we also need to do a good job in the maintenance work, maintenance well, the nodular cast iron well cover can be strong and durable.
Thank you for reading, hope the above content is helpful to you, if you want to know more wonderful content, please click our official website: Shandong ductile iron manhole cover http://www.zgcjxdw.com .