The three main parameters of drill chucks are precision, clamping force and clamping range.
Precision is used to control the runout of the clamped handle tool to ensure the accuracy of the processed hole.
The clamping force is to ensure that the clamped handle tool does not slip and prevent the handle tool from slipping and failing to work. Generally, the chuck used on the bench drill has higher precision requirements, while the chuck used on the hand drill has relatively lower precision.
The clamping range is used to control the minimum and maximum diameters of the chuck clamping tool to meet the work needs.
The drill chuck is one of the main accessories in the power tool industry and the machine tool industry, and is widely used in hand drills and drilling machines. The chuck is an accessory connected to the drill tool and used to clamp the handle tool. There are two ways to connect it to the drill tool: threaded connection and taper hole connection.
According to the current chuck specifications, the threaded connection specifications mainly include 3/8-24UNF, 1/2-20UNF, 5/8-16UN, M12×1.25. There must be B10, B12, B16, B18, B22 and JT0, JT2, JT3, JT6, JT10, JT33 and other specifications.
Threaded connections are mainly used on hand drills, and tapered hole connections are mainly used on drilling machines.
Under normal circumstances, the maximum clamping range is only about 0.5mm larger than the specification of the chuck. If it exceeds the specification, it will greatly waste materials and increase the production cost of the chuck. The minimum clamping range can be very small in theory, but if it is too small, the manufacturer's scrap rate will increase and increase costs. Therefore, considering all aspects, it is more reasonable to set the clamping range of 6, 10, 13, 16, and 20mm chucks to 0.8-6, 0.8-10, 1.5-13, 3-16, and 5-20.
Specification refers to the maximum diameter that the chuck can hold. The specifications of drill chucks are divided into several specifications such as 6, 10, 13, 16, and 20 mm. Hand-tight drill chucks are generally only available in 6, 10, and 13 mm, because if they are larger, the clamping force of the chuck cannot meet the use requirements. Since the wrench chuck is tightened with a wrench, the clamping force of the chuck is large, so the specification can be 20 mm.
The drill chuck can be made of white steel, tungsten steel chuck, auxiliary shaft chuck, special chuck, with rich varieties, and the tool path accuracy can be guaranteed within 0.01-0.015. The use of segmented heat treatment can extend the service life of the chuck. It has good wear resistance and has been widely used in various types of hand drills and drilling machines.