Original title: Why are there black, white and gold drill bits? What's the difference? Which one is of good quality? ☞ This is the 12159th article posted by Metalworking (mw1950pub) Editor's note Drilling is a very widely used processing method in mechanical processing. The drill bits used in drilling usually have different colors. So what do these different colors portend? Drilling is a very extensive processing method in the manufacturing industry. I believe that the small partners who often w...

Original title: The strongest rotary drilling arrangement in history, if you don't know, the construction will be in vain! This article has sorted out the characteristics and scope of application of all rotary drilling tools. You can select and use these drilling tools according to their characteristics during construction. It is strongly recommended for collection! Category I: rotary drilling bucket A: Rock-socketed sand hopper Features: The main body type is the same as the sand layer drilling...

Original title: Structure of down-the-hole drill | Working principle and classification of down-the-hole drill Let the mood travel Down-the-hole drill, which you may not hear much about, is a kind of drilling machine, which is often used for drilling rock anchor cable holes, anchor holes, blasting holes, grouting holes and other drilling construction in urban construction, railway, highway, river, hydropower and other projects. In this article, the small drill will give you a detailed introducti...

Original Title: Construction Method Sharing of Rotary Drilling Rig Roller Bit Drilling Rock-socketed Pile I. Characteristics of construction method 1. The machines and tools used in the construction method are compared with the original steel shot The machines and tools required for alloy drilling are basically the same, except that the rock breaking tool, the drill bit, is replaced and a weighting device is added, which can be popularized and used in general rock-socketed pile construction site...

Original title: Jinan tries out "centralized cooling" without air conditioning, and the room temperature is about 26 ℃. In recent years, the continuous high temperature days have made air conditioning an indispensable "life-prolonging" equipment in summer. Jinan, however, has made everyone feel the coolness of summer in another way, that is, centralized cooling. Since the trial operation of the centralized cooling mode in Jinan CBD area last year, it has covered nearly 210,000 square meters of u...

Original Title: SB330-50A1/114A9-330a Bladder 240926 Bladder 50LM50x1,5/VG5 IIR44/CK35 (compl SB330-50A1/114A9-330a Bladder 240926 Bladder 50LM50x1,5/VG5 IIR44/CK35 (compl) Don't touch things you can't handle. It's the smartest decency to have self-knowledge and know how to fit and stop. SB330-50A1/114A9-330a corresponding to leather bag 50L IIR butyl material 3 240926 Bladder 50LM50x1,5/VG5 IIR44/CK35 (compl SB330-24A1/114A9-330a corresponding to the leather bag 24L IIR butyl material 2 376255 ...

Original Title: Plant Extraction and Separation Methods and Suitable Centrifuge Equipment For plant extraction, centrifuge has become one of the indispensable equipment for enterprises, but for plant extraction, the four commonly used plant extraction methods include ultrasonic extraction, microwave extraction, supercritical extraction and membrane extraction. Its advantages and disadvantages are as follows: 1. Ultrasonic extraction Ultrasonic cavitation accelerates the leaching of plant useful ...

Original title: How much do you know about the types, uses and principles of heat exchangers in the petrochemical industry? At this stage, in the petrochemical industry, the application of heat exchanger is very extensive. Next, Xiaobian shares with you the types and use principles of heat exchangers in the petrochemical industry. Heat pipe heat exchanger in petrochemical industry Generally, the heat pipe heat exchanger is widely used in the harsh conditions of recovering waste heat in the petro...