Item Type: Drill Chuck <br>Model: APU13-MTB3 <br>Material: 42CrMo <br>Taper Shank Maximum End Diameter: Approx. 23.8mm / 0.9in <br>Cone Length: Approx. 86mm / 3.4in <br>Taper: Morse 3 <br>Thread: M12 <br>Type: Pull back self-tightening <br>Hardness: HRC50-55 <br>Accuracy: Less than 0.07mm <br>Clamping Range: Approx. 1-13mm / 0-0.5in <br>How to Use: Machine tool clamping use, self-tightening<br>1、The one-piece structure can reduce connection errors, and the threaded structure will prevent the chuck from falling off. <br>2、3?jaw clamping type, the jaws shrink and hold stable and more powerful, which is beneficial to improve processing efficiency. <br>3、Made of 42CrMo material, with high tensile strength and good toughness, it is not easy to break during operation. <br>4、The surface is precisely ground to increase the finish and abrasion resistance to achieve a better use effect. <br>5、The taper shank is integrally heat treated and finely ground, and the contact area with the inner hole of the machine tool spindle is more than 85%.1 x Drill Chuck