4-22mm HSS 4241 Hex Shank Titanium-plated Straight Flute Step Drill

Features of step drill 1. Ladder structure, one drill bit can open a variety of specifications and sizes of apertures. 2. Deburring, chamfering, drilling and reaming, opening oval holes, the functions that cannot be done by twist drills, it is possible. 3. Compared with ordinary twist drills, it shakes less and is not easy to break when used, and it can open a beautiful hole without using a center punch. 4. It can be installed and used with electric hand drill and bench drill. Specifications Name: 4-22mm Hex Titanium-plated Straight Flute Step Drill Material: High Speed Steel 4241 Color: As shown Surface treatment: Titanium-plated Specification: 4-22mm (10 steps: 4, 6, 8, 10, 12, 14, 16, 18, 20, 22mm) Shank: 6.35mm(Dia), 23mm(L) Total: 75mm(L) Applicable materials: Suitable for workpieces with a hardness below 25. Such as carbon steel, thin iron plates, insulating plates, PVC plates, wood boards, etc. Notice 1. Water injection cooling while working can effectively extend the service life of the drill bit. The recommended drilling speed is 250-400 rpm. 2. For stainless steel, you must choose 6542/M2 material. This step drill is made of 4241 material, so stainless steel cannot be processed. 3. The thickness of the workpiece to be processed needs to be below 5mm!!! Package includes 1 x Hex Titanium-plated Step Drill