This versatile chuck is made of high-quality ed steel, resistant to compression and has a long service life. It has two-way jaws to hold industrial parts in the size range 0.24″ / 6 mm – 9.84″ / 250 mm. Of course, this lathe chuck self-centering function can save the trouble of repeated calibration during installation. This chuck is easy to install and easy to operate. It is suitable for all kinds of general-purpose lathes, economical CNC lathes, grinding machines, milling machines, drilling machines, and machine tool accessories. All guide rails and bearing surfaces of this jaw self-centering keyed chuck are precision-machined and have passed the HRC 58-62 test. Because the pitch of the flat rectangular thread is equal, the three claws have the same movement distance, which has the function of automatic centering. When the bevel gear is pulled with a wrench, the thread wood lathe chuck starts to operate, and the bevel gear controls the precision of the work-piece held by the chuck. This chuck is equipped with a set of reversible jaws, the external jaw clamping range is larger than the internal jaw, which is suitable for clamping a variety of industrial parts. This mini lathe chuck is composed of a chuck body, a movable chuck, and a claw drive. Because the chuck is self-centering and requires no calibration, installation is simple and quick. The 3 jaw lathe chuck is suitable for a variety of general-purpose lathes, economical CNC lathes, grinding machines, milling machines, drilling machines, and machine tool accessories. The lathe chuck body is made of high-quality hardened steel, and the hardness test of the jaws and guides is HRC58-62. It has high strength and toughness, compression resistance and durability, and long service life. The wood lathe chuck jaws and three jaws are self-centering, the alignment accuracy is less than or equal to 0.002 / 0.05 mm, and no adjustment is required after installation. The high precision design of the chuck bevel gear guarantees the accuracy of the chuck operation. DOUBLE JAW CHUCK JAWS? – Internal jaw is a positive L-shape, and external jaw is an inverted L-shape. The clamping range of this chuck is between 0.24″ / 6 mm – 9.84″ / 250 mm, which is suitable for clamping a variety of industrial parts. The 3 jaw lathe chuck has an automatic centering function, so it does not need to be repeatedly calibrated during installation. It only needs to be installed in the correct order, which is simple, fast, and convenient. The accessory screws make the scroll chuck highly adaptable and can be used with the same series of jaws as the chuck. This power lathe chuck is suitable for clamping various parts such as hanging shafts, disks, equilateral triangles, etc. Assembled Product Dimensions (L x W x H): 12.60 x 12.60 x 8.27 Inches. My goal is to make sure you are a happy customer and pleasant shopping with us. We will answer all questions and resolve any problems as quickly as possible. Beijing: 9:30-18:00 from Monday 9:30 to Saturday 18:00. New York: 21:30 – 6:00 from Sunday 21:30 to Saturday 6:00. We try our best to reply to your emails as soon as possible, however, due to high volume of daily incoming emails and time zone difference, we may not be able to reply your emails immediately. Please give us the opportunity to resolve any problem. We understand the concerns and frustrations you might have, and will try our best to resolve the issues. We care about our valued customers, and will always try to help you. These charges are the buyers responsibility. Communication is the best way to solve problem.