Diesel Engine Spare Parts Engine Jaw Coupling Spider NT855 NTA855 V28 101920 109859 3046200

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A chuck is a mechanical device used on a machine tool to clamp workpieces. A machine tool accessory that utilizes the radial movement of movable jaws evenly distributed on the chuck body to clamp and position the workpiece. A chuck generally consists of three parts: a chuck body, a movable claw, and a claw drive mechanism. The minimum diameter of the chuck body is 65 millimeters, and the maximum can reach 1500 millimeters. There is a through hole in the center for passing through the workpiece or bar material; The back has a cylindrical or short conical structure, which is directly or through a flange connected to the end of the machine tool spindle. Chucks are usually installed on lathes, external cylindrical grinders, and internal cylindrical grinders, and can also be used in conjunction with various indexing devices for milling and drilling machines.
A chuck is a mechanical device used on a machine tool to clamp workpieces.
model
The chuck machine tool uses manual self centering chucks, which are divided into short cylindrical and short conical chucks according to their connection with the spindle end of the machine tool.
Short cylinder
Generally connected through a transition plate; The short conical chuck can be directly connected to the end of the machine tool spindle, and the connection of the short conical chuck can be divided into four types: A1, A2, C, and D. A2 type has better strength than A1 because it is connected to the outer ring thread of the machine tool spindle end. However, due to the limitations of the internal structure of the chuck, except for a small portion that can be selected, most can only choose A1 type which can be connected to the inner ring thread of the machine tool spindle end. The connection between the C-type and the spindle end of the machine tool is fixed with a pin bolt, which belongs to a type of quick change chuck and can be quickly loaded and unloaded. The D-type is connected to the end of the machine tool spindle by a pull rod, which is tightened by the cam pin at the end of the spindle. It belongs to another type of quick change chuck. The tapered hole design of the short cone chuck is located on the pressure cover of the chuck, and is assembled with two inner and outer screws to form a closed structure, resulting in high centering accuracy and good rigidity. Short overhang.
Short cone
Short cones have been widely used at the spindle end of foreign machine tools, so short cone chucks are indispensable functional components for machine tools. According to international standards, short cone chucks have begun to be popularized in China. Although the price difference between short cone chuck and short cylindrical chuck is about 25%, the actual price difference is less than 10% after deducting the cost of transition disc. The use value of short cone chuck is much higher than that of short cylindrical chuck. The gripper structures of short cylindrical and short conical chucks are divided into two types: integral gripper and separation gripper; Integrated claw - a claw that integrates the basic claw and the top claw, and is connected to the base claw by a cylindrical head hexagonal screw, which can be adjusted to be used as a front or back claw

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