Kennametal 1517255 Replaceable-tip Drill Ksem Series

Product Description

The KENNAMETAL 1517255 is a replaceable-tip drill body in the KSEM series, designed for deep-hole drilling applications in metal-cutting operations. It accepts KSEM1125 insert tips at an Insert Seat Size 7, allowing the cutting tip to be swapped without replacing the entire drill body. The drill body covers a diameter range of 28.58 to 29.08 mm (1.1252 to 1.1449 inches) with a maximum drill depth of 228.6 mm (9.0 inches), representing an 8xD depth-to-diameter ratio. Overall length is 355.6 mm (14.0 inches). Through-coolant delivery is supported, which is critical for chip evacuation and tool life at these depths. This tool is installed by machinists and CNC operators in production and job-shop environments.

This drill body is suited for deep-hole operations on CNC machining centers and lathes where consistent bore diameter and chip control are required. The 31.75 mm Weldon Flat shank provides positive drive and radial location in standard Weldon-style toolholders. The 8xD depth capability makes it appropriate for through-holes and blind bores in steel, cast iron, and similar workpiece materials typical of the KSEM series application range. The flute length of 257.34 mm (10.13 inches) and shank length of 3.25 inches support reach into deep-feature workpieces.

Key Features

• Replaceable KSEM1125 insert tip — swap the cutting edge without discarding the drill body
• 8xD maximum depth ratio, reaching up to 228.6 mm (9.0 inches)
• Through-coolant delivery with NPT-threaded coolant ports for chip evacuation and thermal control
• 31.75 mm Weldon Flat shank for positive radial drive in standard toolholders
• Insert Seat Size 7 for precise, repeatable tip location
• 355.6 mm overall length with 257.34 mm flute length for deep-feature reach

Compatibility

Compatible with KSEM1125 series replaceable insert tips at Insert Seat Size 7. Fits toolholders accepting a 31.75 mm Weldon Flat shank. Body-side coolant port is 1/8-27 NPT; shank-end coolant port is 1/4-18 NPT.

Installation Notes

Installation is performed by a qualified machinist or CNC setup technician. Ensure the machine spindle and coolant supply are fully de-energized and locked out before mounting or removing the drill body. Seat the Weldon Flat shank fully into the toolholder and torque the set screw per the toolholder manufacturer specification. Verify coolant line connections at both NPT ports are leak-free before initiating the first cycle, and confirm insert tip is properly seated and secured before running.