China Suppliers Factory KSD Indexable Insert Drill for DEREK or SUMITOMO Inserts

The KSD-W series uses WCMX-type inserts (e.g., WCMX030208, WCMX040208, WCMX080412), which are W-shaped trigon inserts commonly used for general-purpose drilling in steel and cast iron. The KSD-S series uses SPMT-type inserts (e.g., SPMT060204, SPMT090408, SPMT140512), which are square positive inserts offering more cutting edges and suited for a broader range of materials including stainless steel and non-ferrous metals.

These designations refer to the drilling depth-to-diameter ratio. 3xD means the drill can reach a depth up to 3 times its diameter, 4xD up to 4 times, and 5xD up to 5 times. For example, a KSD drill with D=20mm and a 3xD rating can drill up to 60mm deep. Deeper ratios (4xD, 5xD) are suitable for applications requiring greater hole depth but may require more careful control of cutting parameters and coolant supply.

In the KSD indexable insert drill specification tables: D is the drill diameter (cutting diameter in mm); d is the shank diameter (in mm); L1 is the flute length (effective cutting depth); L2 is the insert cutting length; and L is the overall tool length. These dimensions are essential for selecting the correct tool holder and ensuring compatibility with your machine spindle and workpiece setup.

Each KSD drill specification in the table lists the matched insert model (e.g., WCMX030208 or SPMT060204) and the corresponding insert screw (e.g., M025W050, M022W050). Always use the exact insert and screw combination specified for your drill model to ensure correct seating, clamping force, and cutting geometry. Using mismatched inserts or screws can result in poor hole quality, insert breakage, or damage to the drill body. The wrench size (e.g., Q08B, Q15B, Q20B) is also specified for proper tightening torque.

The KSD series indexable insert drills are available with shank diameters of d=25mm, d=32mm, and d=40mm, covering drill diameters from 15mm to 70mm. The C25 shank (25mm) is used for smaller drill diameters (typically D15–D19.5mm), the C32 shank (32mm) for mid-range diameters (D20–D39mm), and the C40 shank (40mm) for larger diameters (D40–D70mm). Selecting the appropriate shank size is critical for rigidity and vibration control during drilling.

Yes, KSD indexable insert drills are designed to be compatible with internal coolant-through systems. Using coolant-through delivery significantly improves chip evacuation, reduces cutting temperature, and extends insert life — especially important when drilling with 4xD and 5xD depth ratios where chip removal can be more challenging. It is recommended to use a suitable cutting fluid or emulsion matched to the workpiece material for optimal drilling performance and tool longevity.