3.17mm Chucks for mini drill tools

Product details of 3.17mm Chucks for mini drill tools Drill chuck with fastenerThe simplest drill chuck available for motor shafts of 2, 2.3 and 3.175 mm diameter. The clamps are part of the chuck and a fastener tightens them around the drill bit. This design allows a limited clamping range, usually no more than 0.5 mm. Such chucks come in various sizes and you should choose a size that matches the drill bit you’ll be using most. Although some claim it can be tighten by hand, the brass alloy is quite rigid and you may not get enough grip without using some pliers. There is only one lateral screw to fix chuck body to motor axis. If you use only one drill bit size, this type of chuck is a good, cheap choice. It is also a good choice for small motors with thin shaft.