Kennametal 1729924 Replaceable-tip Drill 20.64-21.14mm

Product Description

The KENNAMETAL 1729924 is a replaceable-tip drill body engineered for deep-hole drilling in metalworking and machining applications. It accepts KSEM0813 insert tips at insert seat size 3, allowing fast tip changes without removing the body from the spindle. The drill spans a diameter range of 20.64 to 21.14 mm (0.8126 to 0.8323 inches) and achieves a maximum drilling depth of 206.5 mm (8.13 inches), representing a 10xD depth-to-diameter ratio. Overall length is 307.98 mm (12.12 inches). The straight-cylindrical shank measures 25.4 mm (1.0 inch) in diameter, providing a secure grip in standard drill chucks and toolholders. This tool body is part of the KSEM series and is intended for use by CNC machinists and toolroom professionals in production environments.

This drill body is suited for deep-hole applications in ferrous and non-ferrous materials where consistent bore diameter and drill body longevity are priorities. The replaceable-tip design reduces downtime compared to solid-carbide drills by allowing insert-only replacement at the cutting end. The 10xD capability makes it well-matched to through-hole and blind-hole operations in structural components, housings, and manifolds where conventional drill depth is insufficient. The KSEM series is a standard platform in production CNC turning and machining centers.

Key Features

• Diameter range of 20.64 to 21.14 mm (0.8126 to 0.8323 inches) accommodates slight size variation with compatible insert tips
• 10xD depth-to-diameter ratio supports deep-hole drilling up to 206.5 mm (8.13 inches)
• Straight-cylindrical shank at 25.4 mm (1.0 inch) fits standard CNC toolholders and drill chucks
• Replaceable KSEM0813 insert tips at seat size 3 allow quick tip changes in the field
• Flute length of 227.76 mm (8.97 inches) promotes chip evacuation throughout the full drilling depth
• KSEM series platform provides broad insert availability for ongoing production use

Compatibility

Designed for use with KSEM0813 replaceable insert tips at insert seat size 3. Part of the KSEM series drill body platform.

Installation Notes

Installation and tool changes should be performed by qualified CNC machinists or toolroom technicians with the machine powered down and in a locked-out, tagged-out state before any insert or body service. Verify shank seating and toolholder clamping torque per the machine manufacturer's specifications before running. Inspect the insert seat and clamping screw for wear or debris before each insert tip installation to maintain bore accuracy and prevent premature tip failure.