The three-jaw chuck consists of a chuck body, movable jaws and a jaw driving mechanism. Under the guide part of the three claws on the three-jaw chuck, there are threads that mesh with the flat threads on the back of the dish-shaped bevel gear. When the small bevel gear is turned with a wrench through the square hole, the dish-shaped gear rotates, and the flat threads on the back simultaneously drive the three claws toward or away from the center to clamp workpieces of different diameters. It is used to replace the three claws with three anti-claws to install workpieces with larger diameters. The self-centering accuracy of the three-jaw chuck is 0.05-0.15mm. The accuracy of processing workpieces with a three-jaw chuck is affected by the manufacturing accuracy of the chuck and the wear and tear after use. The chuck is divided into two types: manual chuck and power chuck according to the power used to drive the jaws. ① Manual chuck: It is a universal accessory. The commonly used three-jaw chucks with automatic centering and four-jaw chucks with each jaw can move independently. The three-jaw chuck has a small bevel gear driving a large bevel gear. On the back of the large bevel gear is Read More »

　　1. The manufacturing errors of the positioning parts, guide parts and tool parts on the three-jaw chuck and the amount of wear during use will change the correct positional relationship between the machine tool, the tool and the workpiece, and can cause processing deviations. 2. The size of these machining deviations can also be determined based on the calculation of manufacturing tolerances of key components of the fixture. It is also possible to measure the actual deflection of a current set of fixtures or a set of fixtures that have been used and worn. According to the measurement results, the centering error of the three-claw self-centering chuck usually can reach 0.1~0.15mm. 3. From the structure of the three-claw self-centering chuck, basically every part of it is a clearance fit. There are certain gaps between each part. For example, the I-shaped groove of the claw and the three-claw chuck housing slide back and forth, creating a certain gap; the plane thread is sleeved on the mandrel of the housing and needs to be rotated, so there is a gap; the three-claw chuck is locked on the flange and also has radial movement. Read More »

　　First, there is a certain taper between the chuck and the spindle. The connection uses 6 hexagonal socket head bolts in the center. To install and replace the chuck, you need to use an hexagon socket wrench to remove the 6 screws. The second type. The connection between the chuck and the spindle relies on the half-cylinder behind the chuck and the half-cylinder in the spindle to engage and fasten each other. Installation and replacement are to use the chuck key to turn the semi-cylinder in the spindle, and the column in the chuck is in a 90-degree engagement and fastening position. It is relatively simple to install and replace. The third type. It is also the most common connection form between the chuck and the spindle. To install or replace, loosen the nut, then rotate the disc at the spindle position a little distance, and the three claws with the connecting screw can be removed or installed. The fourth type. There is a threaded direct connection between the chuck and the spindle. This form of connection is relatively stable. Installation and replacement. Just like removing a nut, turn it clockwise to install it. Counterclockwise is to remove. Read More »

The three-jaw chuck is also called the three-jaw self-centering chuck. It determines the rotation center of the workpiece based on the circumference of the workpiece clamping part, but its centering accuracy is not very high. Generally, depending on the usage occasion, a three-jaw chuck with higher clamping accuracy is selected for finishing turning, grinding, and milling parts with higher precision using a universal indexing head, while in rough turning and grinding, milling and other processes where invisible position accuracy is required, a three-jaw chuck with lower clamping accuracy is used. The principle of clamping workpieces with a three-jaw chuck is to use the chuck wrench to rotate any one of the three bevel teeth on the circumference. This drives the plane thread to rotate and drives the three claws to move together, which plays a role in self-centering the workpiece. From a mechanical structure point of view, the three bevel teeth of the chuck have the same function, but after careful inspection, the accuracy of the three bevel teeth in clamping the workpiece is not the same, and the difference is also large. Read More »

　1 inch is equal to 25.4MM, but 5 inches is 127mm, which is 130 diameter relative to the chuck. Inch (inch) is a unit of length used in the United Kingdom (UK, the British Commonwealth) and its former colonies, generally 1in=2.54cm. In the imperial system, 12 inches is 1 foot, and 36 inches is 1 yard. Main dimensions of 80 chuck claws: 12mm thick, 7mm wide side grooves 100 main dimensions of chuck claws: 15mm thick, 8mm wide side grooves 130 chuck claw dimensions: 16mm thick, 8mm wide side grooves 160 chuck jaw main dimensions: 18.5mm thick, side groove width 10mm 200 chuck jaw main dimensions: 22mm thick, side groove width 10mm 250 chuck jaw main dimensions: 27mm thick, side groove width 10mm 320 chuck jaw main dimensions: 36mm thick, side groove Read More »

Hydraulic chucks are widely used in CNC machine tools. If they are used for a long time, they will not be clamped tightly. In order to ensure that the chuck still has good accuracy in long-term use, lubrication is very important. Incorrect or inappropriate lubrication will cause problems such as: abnormal function at low pressure, weakening of clamping force, and poor clamping accuracy. Hydraulic chucks wear and seize abnormally, so it is necessary to lubricate the chuck correctly. Use chuck lubricant, and be sure to use an air gun or similar tool to clean the chuck body and slide surface after work. Using cutting oil with anti-rust effect can prevent rust inside the chuck. If rust occurs, the clamping force will be reduced, so special attention must be paid. The hydraulic chuck chuck must be removed and cleaned every six months, but if cutting cast iron, it must be cleaned once or more every two months. Check all parts for cracks and wear. After the inspection is completed, oil must be supplied before assembly. 1. Do a good job of smoothing Read More »

The operation of CNC mechanical equipment is inseparable from the chuck, and the pneumatic chuck can ensure the accuracy of the lathe equipment. It has the advantages of simple structure and labor-saving installation. So how should the pneumatic chuck be installed? What are its advantages compared to ordinary chucks? 1. Advantages and characteristics of pneumatic chuck 1. Compared with ordinary chucks, the working efficiency of pneumatic chucks will be greatly improved, such as in clamping. And the practical lifespan will be much longer in comparison. 2. The structure of the pneumatic chuck is very simple and there are no complicated parts and components, so the installation is very convenient and labor-saving, and it is not easy to cause mistakes. 3. In terms of consumables and energy, it can be called no consumption. It is also environmentally friendly and has no pollution, which is a practical and superb advantage today when environmental pollution is increasing day by day. 4. In the machinery industry, everyone knows that safety is the most important thing. Therefore, pneumatic chucks undergo strict factory testing, pressure testing, and error testing. Read More »

The rapid development of machinery manufacturing industries such as hydraulic clamps is due to the promotion of rapid economic development, and the rapid development of brokerage has promoted the rapid development of the machinery manufacturing industry. Then, it has further enhanced the importance of CNC lathes! CNC equipment particularly relies on night-pressure fixtures and pneumatic chuck products to clamp workpieces to ensure the accuracy of turning out equipment. The jaws of the chuck in the hydraulic clamp must be manufactured through a special process to ensure the quality of the chuck and the normal operation of the CNC equipment. Chucks are generally divided into four-claw, six-claw, eight-claw and twelve-claw. The pneumatic chuck we produce can increase or decrease the pressure according to the work requirements when the CNC lathe is working, so as to assist the CNC lathe to turn out better and more beautiful craft parts. Today, when hydraulic clamps are widely used in CNC lathes, we can see the rapid progress of the machinery manufacturing industry and the technical difficulties being overcome one by one. This is inseparable from a good type of workpiece and excellent quality. Read More »