KSD: Identifies the manufacturer's specific product series line for indexable square-insert U-drills.
170: Indicates the exact metric Cutting/Drilling Diameter (D) of 17.0 mm.
-3D: Specifies the Maximum Drilling Depth Ratio. The length of the drill allows it to plunge up to 3 times its diameter (3 × D), giving it a total operational reach depth of approximately 51 mm.
-525 (or -S25): Defines the straight shank type and its physical size. It features a metric 25 mm Shank Diameter to securely lock into a CNC lathe turret block or a machining centre's side-lock Whistle Notch/Weldon toolholder. Designates the required insert pocket size code. This body is machined precisely to accommodate SPMG 060204 or SPGT 060204 series square, 4-corner indexable carbide inserts.
(H13): Specifies the base core material of the tool body itself. It is machined from heavy-duty AISI H13 hot-work tool steel, which is chromium-molybdenum-vanadium alloyed to resist thermal fatigue, flexing, and bore abrasive wear under extreme environments.